refactor: enforce BasedPyright strict type checking (#5158)

.agent/design.md

@@ -24,6 +24,14 @@ Fix bugs by changing only what is necessary. Do not bundle unrelated refactors o
 
 A bugfix should make the protected invariant clear, change the smallest surface that enforces it, and add only the closest regression test. If a diff starts changing ownership boundaries or mixing behavior changes with clean-up, split it before it becomes hard to review.
 
+## Type dynamic boundaries at the edge
+
+Wire payloads, persisted records, and third-party SDK objects are untrusted dynamic boundaries. Prefer a parser or small normalizer at the owning edge, and use `TypedDict` for stable dictionary shapes, so validation happens once and internal code receives a concrete type. Do not spread raw dynamic dictionaries or SDK objects through the core.
+
+Stable first-party dependencies must be typed where they are stored or passed. Do not declare an internal service, context field, or callback result as `Any` and then recover its real type with consumer-side casts. Use the concrete type or a narrow `Protocol`; reserve `Any` for genuinely dynamic boundaries.
+
+`typing.cast` performs no runtime validation. Every new cast must be supported by a runtime check on the same path or by an explicit invariant that is clear from construction and control flow (and documented locally when it is not obvious). If input can violate the claimed type, handle that invalid case before casting; never use `cast` only to silence BasedPyright.
+
 ## Explicit over magical
 
 Configuration must be declared explicitly in `config/schema.py` Pydantic models. Error handling should raise clear exceptions rather than silently correcting bad input. Provider auto-detection exists, but every resolution path must be traceable from the factory to the concrete provider class.

.github/workflows/ci.yml

@@ -129,6 +129,10 @@ jobs:
         if: matrix.coverage
         run: uv run --no-sync ruff check nanobot tests conftest.py
 
+      - name: Type check with BasedPyright (strict)
+        if: matrix.coverage
+        run: uv run --no-sync basedpyright
+
       - name: Run tests with coverage
         if: matrix.coverage
         run: >-

AGENTS.md

@@ -11,6 +11,11 @@ nanobot is a lightweight, open-source AI agent framework written in Python with
 pytest tests/test_openai_api.py::test_function -v
 ruff check nanobot/
 
+# Strict type checking (matches CI)
+uv sync --all-extras --dev
+uv run --no-sync python -m scripts.install_channel_dependencies --all-channels
+uv run --no-sync basedpyright
+
 # WebUI: dev server (proxies API/WS to gateway :8765), build, test
 # Build outputs to ../nanobot/web/dist (bundled into the Python wheel)
 cd webui && bun run dev      # or NANOBOT_API_URL=... bun run dev

CONTRIBUTING.md

@@ -78,6 +78,20 @@ ruff check nanobot/
 ruff format <files-you-changed>
 ```
 
+### Strict Type Checking
+
+Strict type checking covers optional providers and channels. Reproduce the CI environment
+with the same dependency sources and commands:
+
+```bash
+uv sync --all-extras --dev
+uv run --no-sync python -m scripts.install_channel_dependencies --all-channels
+uv run --no-sync basedpyright
+```
+
+Keep `--no-sync` on the final commands: channel dependencies come from their package
+manifests and are installed explicitly by the setup step.
+
 ## Contribution License
 
 By submitting a contribution, you confirm that you have the right to submit it

nanobot/__init__.py

@@ -6,6 +6,32 @@ import tomllib
 from importlib.metadata import PackageNotFoundError
 from importlib.metadata import version as _pkg_version
 from pathlib import Path
+from typing import TYPE_CHECKING, Any
+
+if TYPE_CHECKING:
+    from .agent.tools.context import RequestContext
+    from .bus.runtime_events import SessionTurnPersisted
+    from .nanobot import (
+        STREAM_EVENT_REASONING_COMPLETED,
+        STREAM_EVENT_REASONING_DELTA,
+        STREAM_EVENT_RUN_COMPLETED,
+        STREAM_EVENT_RUN_FAILED,
+        STREAM_EVENT_RUN_STARTED,
+        STREAM_EVENT_TEXT_COMPLETED,
+        STREAM_EVENT_TEXT_DELTA,
+        STREAM_EVENT_TOOL_COMPLETED,
+        STREAM_EVENT_TOOL_FAILED,
+        STREAM_EVENT_TOOL_STARTED,
+        STREAM_EVENT_TYPES,
+        Nanobot,
+        RunResult,
+        RunStream,
+        SessionInfo,
+        SessionSnapshot,
+        StreamEvent,
+        StreamEventType,
+    )
+    from .runtime_context import RuntimeContextBlock, RuntimeContextProvider
 
 
 def _read_pyproject_version() -> str | None:
@@ -54,7 +80,7 @@ _LAZY_EXPORTS = {
 }
 
 
-def __getattr__(name: str):
+def __getattr__(name: str) -> Any:
     module_path = _LAZY_EXPORTS.get(name)
     if module_path is None:
         raise AttributeError(f"module {__name__!r} has no attribute {name!r}")

nanobot/agent/autocompact.py

@@ -4,7 +4,7 @@ from __future__ import annotations
 
 from collections.abc import Collection
 from datetime import datetime
-from typing import TYPE_CHECKING, Callable, Coroutine
+from typing import TYPE_CHECKING, Any, Callable, Coroutine, cast
 
 from loguru import logger
 
@@ -65,7 +65,7 @@ class AutoCompact:
 
     def check_expired(
         self,
-        schedule_background: Callable[[Coroutine], None],
+        schedule_background: Callable[[Coroutine[Any, Any, None]], None],
         resolve_runtime: Callable[[Session], LLMRuntime],
         active_session_keys: Collection[str] = (),
     ) -> None:
@@ -103,8 +103,8 @@ class AutoCompact:
                 meta = session.metadata.get("_last_summary")
                 if isinstance(meta, dict):
                     self._summaries[key] = (
-                        meta["text"],
-                        datetime.fromisoformat(meta["last_active"]),
+                        cast(str, meta["text"]),
+                        datetime.fromisoformat(cast(str, meta["last_active"])),
                     )
         except Exception:
             logger.exception("Auto-compact: failed for {}", key)
@@ -126,5 +126,8 @@ class AutoCompact:
         # Cold path: summary persisted in session metadata (process restarted).
         meta = session.metadata.get("_last_summary")
         if isinstance(meta, dict):
-            return session, self._format_summary(meta["text"], datetime.fromisoformat(meta["last_active"]))
+            return session, self._format_summary(
+                cast(str, meta["text"]),
+                datetime.fromisoformat(cast(str, meta["last_active"])),
+            )
         return session, None

nanobot/agent/context.py

@@ -4,7 +4,7 @@ import base64
 import mimetypes
 import platform
 from pathlib import Path
-from typing import Any, Mapping, Sequence
+from typing import Any, Mapping, Sequence, cast
 
 from nanobot.agent.memory import MemoryStore
 from nanobot.agent.skills import SkillsLoader
@@ -148,7 +148,12 @@ class ContextBuilder:
 
         def _to_blocks(value: Any) -> list[dict[str, Any]]:
             if isinstance(value, list):
-                return [item if isinstance(item, dict) else {"type": "text", "text": str(item)} for item in value]
+                return [
+                    cast(dict[str, Any], item)
+                    if isinstance(item, dict)
+                    else {"type": "text", "text": str(item)}
+                    for item in cast(list[Any], value)
+                ]
             if value is None:
                 return []
             return [{"type": "text", "text": str(value)}]
@@ -157,7 +162,7 @@ class ContextBuilder:
 
     def _load_bootstrap_files(self, workspace: Path | None = None) -> str:
         """Load project instructions plus the agent's global profile files."""
-        parts = []
+        parts: list[str] = []
         project_root = workspace or self.workspace
         sources = [
             ("AGENTS.md", project_root),
@@ -212,7 +217,7 @@ class ContextBuilder:
         user_content = self.build_user_content(current_message, image_paths=media)
         blocks = list(runtime_context_blocks or ()) if current_role == "user" else []
         merged, runtime_context_meta = append_runtime_context(user_content, blocks)
-        messages = [
+        messages: list[dict[str, Any]] = [
             {
                 "role": "system",
                 "content": self.build_system_prompt(
@@ -235,7 +240,7 @@ class ContextBuilder:
                 last["_meta"] = internal_meta
             messages[-1] = last
             return messages
-        current = {"role": current_role, "content": merged}
+        current: dict[str, Any] = {"role": current_role, "content": merged}
         if current_role == "user" and runtime_context_meta is not None:
             current["_meta"] = {RUNTIME_CONTEXT_MESSAGE_META: runtime_context_meta}
         messages.append(current)
@@ -250,7 +255,7 @@ class ContextBuilder:
         if not image_paths:
             return text
 
-        image_blocks = []
+        image_blocks: list[dict[str, Any]] = []
         for path in image_paths:
             p = Path(path)
             if not p.is_file():

nanobot/agent/context_governance.py

@@ -9,7 +9,7 @@ from __future__ import annotations
 
 from dataclasses import dataclass
 from pathlib import Path
-from typing import TYPE_CHECKING, Any
+from typing import TYPE_CHECKING, Any, cast
 
 from loguru import logger
 
@@ -23,6 +23,7 @@ from nanobot.utils.helpers import (
 from nanobot.utils.runtime import ensure_nonempty_tool_result
 
 if TYPE_CHECKING:
+    from nanobot.agent.tools.registry import ToolRegistry
     from nanobot.providers.base import LLMProvider
 
 SNIP_SAFETY_BUFFER = 1024
@@ -49,8 +50,9 @@ def _tool_call_name_is_valid(tool_call: Any) -> bool:
     """
     if not isinstance(tool_call, dict):
         return False
-    fn = tool_call.get("function")
-    name = fn.get("name") if isinstance(fn, dict) else tool_call.get("name")
+    tool_call_data = cast(dict[str, Any], tool_call)
+    fn = tool_call_data.get("function")
+    name = cast(dict[str, Any], fn).get("name") if isinstance(fn, dict) else tool_call_data.get("name")
     return isinstance(name, str) and bool(name)
 
 
@@ -58,7 +60,7 @@ def _tool_call_name_is_valid(tool_call: Any) -> bool:
 class ContextGovernanceConfig:
     provider: LLMProvider
     model: str
-    tools: Any
+    tools: ToolRegistry
     workspace: Path | None
     session_key: str | None
     max_tool_result_chars: int
@@ -199,7 +201,7 @@ class ContextGovernor:
                 if updated is not None:
                     updated.append(msg)
                 continue
-            kept = [tc for tc in calls if _tool_call_name_is_valid(tc)]
+            kept = [tc for tc in cast(list[Any], calls) if _tool_call_name_is_valid(tc)]
             if len(kept) == len(calls):
                 if updated is not None:
                     updated.append(msg)
@@ -238,9 +240,11 @@ class ContextGovernor:
         for idx, msg in enumerate(messages):
             role = msg.get("role")
             if role == "assistant":
-                for tc in msg.get("tool_calls") or []:
-                    if isinstance(tc, dict) and tc.get("id"):
-                        declared.add(str(tc["id"]))
+                for tc in cast(list[Any], msg.get("tool_calls") or []):
+                    if isinstance(tc, dict):
+                        tool_call = cast(dict[str, Any], tc)
+                        if tool_call.get("id"):
+                            declared.add(str(tool_call["id"]))
             if role == "tool":
                 tid = msg.get("tool_call_id")
                 tid_str = str(tid) if tid else ""
@@ -266,13 +270,17 @@ class ContextGovernor:
         for idx, msg in enumerate(messages):
             role = msg.get("role")
             if role == "assistant":
-                for tc in msg.get("tool_calls") or []:
-                    if isinstance(tc, dict) and tc.get("id"):
+                for tc in cast(list[Any], msg.get("tool_calls") or []):
+                    if isinstance(tc, dict):
                         name = ""
-                        func = tc.get("function")
-                        if isinstance(func, dict):
-                            name = func.get("name", "")
-                        declared.append((idx, str(tc["id"]), name))
+                        tool_call = cast(dict[str, Any], tc)
+                        if tool_call.get("id"):
+                            func = tool_call.get("function")
+                            if isinstance(func, dict):
+                                func_data = cast(dict[str, Any], func)
+                                raw_name = func_data.get("name", "")
+                                name = raw_name if isinstance(raw_name, str) else str(raw_name)
+                            declared.append((idx, str(tool_call["id"]), name))
             elif role == "tool":
                 tid = msg.get("tool_call_id")
                 if tid:

nanobot/agent/hooks/file_edit_activity.py

@@ -4,7 +4,7 @@ from __future__ import annotations
 
 from collections.abc import Awaitable, Callable
 from pathlib import Path
-from typing import Any
+from typing import Any, cast
 
 from nanobot.agent.hook import (
     AgentHook,
@@ -56,17 +56,21 @@ class FileEditActivityHook(AgentHook):
     ) -> None:
         if self._on_progress is None or not isinstance(params, dict):
             return
+        typed_params = cast(dict[str, Any], params)
         trackers = prepare_file_edit_trackers(
             call_id=tool_call.id,
             tool_name=tool_call.name,
             tool=tool,
             workspace=self._workspace,
-            params=params,
+            params=typed_params,
         )
         if not trackers:
             return
         self._trackers_by_call[self._tool_call_key(tool_call)] = trackers
-        await self._emit([build_file_edit_start_event(tracker, params) for tracker in trackers])
+        await self._emit([
+            build_file_edit_start_event(tracker, typed_params)
+            for tracker in trackers
+        ])
 
     async def after_execute_tool(
         self,

nanobot/agent/loop.py

@@ -1,5 +1,7 @@
 """Agent loop: the core processing engine."""
 
+# pyright: reportPrivateUsage=false
+
 from __future__ import annotations
 
 import asyncio
@@ -7,13 +9,13 @@ import dataclasses
 import inspect
 import os
 import time
-from collections.abc import Mapping
+from collections.abc import Coroutine, Iterable, Mapping
 from contextlib import AbstractContextManager, ExitStack, nullcontext, suppress
 from dataclasses import dataclass, field
 from enum import Enum, auto
 from functools import partial
 from pathlib import Path
-from typing import TYPE_CHECKING, Any, Awaitable, Callable, TypeVar
+from typing import TYPE_CHECKING, Any, Awaitable, Callable, TypeVar, cast
 
 from loguru import logger
 
@@ -94,10 +96,13 @@ if TYPE_CHECKING:
     from nanobot.agent.tools.mcp import MCPConnection
     from nanobot.config.schema import (
         ChannelsConfig,
+        Config,
+        MCPServerConfig,
         ProviderConfig,
         ToolsConfig,
     )
     from nanobot.cron.service import CronService
+    from nanobot.triggers.local_store import LocalTriggerStore
 
 _T = TypeVar("_T")
 
@@ -142,7 +147,7 @@ class TurnContext:
     on_runtime_admitted: Callable[[LLMRuntime], Awaitable[None]] | None = None
     on_retry_wait: Callable[[str], Awaitable[None]] | None = None
 
-    pending_queue: asyncio.Queue | None = None
+    pending_queue: asyncio.Queue[InboundMessage] | None = None
     pending_summary: str | None = None
 
     ephemeral: bool = False
@@ -156,6 +161,18 @@ class TurnContext:
     visible_run_started_at: float | None = None
     turn_latency_ms: int | None = None
 
+    def require_runtime(self) -> LLMRuntime:
+        """Return the runtime established by the BUILD stage."""
+        if self.runtime is None:
+            raise RuntimeError("turn runtime is not initialized; BUILD must run before this stage")
+        return self.runtime
+
+    def require_session(self) -> Session:
+        """Return the session established by the RESTORE stage."""
+        if self.session is None:
+            raise RuntimeError("turn session is not initialized; RESTORE must run before this stage")
+        return self.session
+
 
 class AgentLoop:
     """
@@ -243,7 +260,7 @@ class AgentLoop:
         cron_service: CronService | None = None,
         restrict_to_workspace: bool = False,
         session_manager: SessionManager | None = None,
-        mcp_servers: dict | None = None,
+        mcp_servers: dict[str, MCPServerConfig] | None = None,
         channels_config: ChannelsConfig | None = None,
         timezone: str | None = None,
         session_ttl_minutes: int = 0,
@@ -266,7 +283,7 @@ class AgentLoop:
         turn_delivery_factory: TurnDeliveryFactory | None = None,
         runtime_model_publisher: Callable[[str, str | None], None] | None = None,
         restart_mode: str = "auto",
-        local_trigger_store: Any | None = None,
+        local_trigger_store: LocalTriggerStore | None = None,
         idle_compact_check_interval_seconds: int = 0,
     ):
         from nanobot.config.schema import ToolsConfig
@@ -381,7 +398,7 @@ class AgentLoop:
         # Per-session pending queues for mid-turn message injection.
         # When a session has an active task, new messages for that session
         # are routed here instead of creating a new task.
-        self._pending_queues: dict[str, asyncio.Queue] = {}
+        self._pending_queues: dict[str, asyncio.Queue[InboundMessage]] = {}
         self._deferred_automation_turns: dict[str, list[InboundMessage]] = {}
         self._cron_turns = CronTurnCoordinator(
             publish_inbound=self.bus.publish_inbound,
@@ -430,7 +447,7 @@ class AgentLoop:
     @classmethod
     def from_config(
         cls,
-        config: Any,
+        config: Config,
         bus: MessageBus | None = None,
         **extra: Any,
     ) -> AgentLoop:
@@ -657,12 +674,17 @@ class AgentLoop:
         """
         if not turn_continuation.should_persist_user_message(msg.metadata):
             return False
-        media_paths = [p for p in (msg.media or []) if isinstance(p, str) and p]
-        has_text = isinstance(msg.content, str) and msg.content.strip()
+        media_paths = [
+            path
+            for path in (msg.media or [])
+            if isinstance(cast(object, path), str) and path
+        ]
+        content_value = cast(object, msg.content)
+        has_text = isinstance(content_value, str) and content_value.strip()
         if has_text or media_paths or runtime_context_blocks:
             extra: dict[str, Any] = ({"media": list(media_paths)} if media_paths else {}) | agent_context.session_extra(msg.metadata)
             extra.update(kwargs)
-            text = msg.content if isinstance(msg.content, str) else ""
+            text = content_value if isinstance(content_value, str) else ""
             text_override, automation_extra = automation_history_overrides(msg.metadata)
             if text_override is not None:
                 text = text_override
@@ -810,7 +832,7 @@ class AgentLoop:
 
     async def _run_agent_loop(
         self,
-        initial_messages: list[dict],
+        initial_messages: list[dict[str, Any]],
         on_progress: Callable[..., Awaitable[None]] | None = None,
         on_stream: Callable[[str], Awaitable[None]] | None = None,
         on_stream_end: Callable[..., Awaitable[None]] | None = None,
@@ -824,7 +846,7 @@ class AgentLoop:
         metadata: dict[str, Any] | None = None,
         session_key: str | None = None,
         original_user_text: str | None = None,
-        pending_queue: asyncio.Queue | None = None,
+        pending_queue: asyncio.Queue[InboundMessage] | None = None,
         ephemeral: bool = False,
         run_extra_hooks_for_ephemeral: bool = False,
         hooks: list[AgentHook] | None = None,
@@ -832,7 +854,7 @@ class AgentLoop:
         turn_scopes: list[AbstractContextManager[Any]] | None = None,
         tools: ToolRegistry | None = None,
         request_context: RequestContext | None = None,
-    ) -> tuple[str | None, list[str], list[dict], str, bool]:
+    ) -> tuple[str | None, list[str], list[dict[str, Any]], str, bool]:
         """Run the agent iteration loop.
 
         *on_stream*: called with each content delta during streaming.
@@ -875,7 +897,12 @@ class AgentLoop:
                     image_paths=image_paths,
                 )
                 row: dict[str, Any] = {"role": "user", "content": user_content}
-                metadata = pending_msg.metadata if isinstance(pending_msg.metadata, dict) else {}
+                metadata_value = cast(object, pending_msg.metadata)
+                metadata = (
+                    pending_msg.metadata
+                    if isinstance(metadata_value, dict)
+                    else {}
+                )
                 if pending_msg.channel != "system":
                     scope = self.workspace_scopes.for_turn(
                         channel=pending_msg.channel,
@@ -899,19 +926,24 @@ class AgentLoop:
                         pending_request,
                         effective_tools,
                     )
-                    row["content"], marker = append_runtime_context(user_content, blocks)
-                    if marker is not None:
-                        row["_meta"] = {RUNTIME_CONTEXT_MESSAGE_META: marker}
+                    row["content"], runtime_marker = append_runtime_context(
+                        user_content,
+                        blocks,
+                    )
+                    if runtime_marker is not None:
+                        row["_meta"] = {
+                            RUNTIME_CONTEXT_MESSAGE_META: runtime_marker,
+                        }
                 if (
                     pending_msg.sender_id == "subagent"
                     and metadata.get("injected_event") == "subagent_result"
                 ):
-                    marker: dict[str, Any] = {"kind": "subagent_result"}
+                    subagent_marker: dict[str, Any] = {"kind": "subagent_result"}
                     task_id = metadata.get("subagent_task_id")
                     if isinstance(task_id, str) and task_id:
-                        marker["subagent_task_id"] = task_id
+                        subagent_marker["subagent_task_id"] = task_id
                         row["subagent_task_id"] = task_id
-                    row[HIDDEN_HISTORY_META] = marker
+                    row[HIDDEN_HISTORY_META] = subagent_marker
                     row["injected_event"] = "subagent_result"
                 return row
 
@@ -1178,7 +1210,7 @@ class AgentLoop:
         gate = self._concurrency_gate or nullcontext()
 
         delivery = self.turn_delivery_factory.unrouted(msg, session_key)
-        pending: asyncio.Queue | None = None
+        pending: asyncio.Queue[InboundMessage] | None = None
         try:
             async with lock, gate:
                 # Only the task that owns the session lock may publish the
@@ -1304,7 +1336,7 @@ class AgentLoop:
         if errors:
             raise BaseExceptionGroup("failed to close agent resources", errors)
 
-    def _schedule_background(self, coro) -> None:
+    def _schedule_background(self, coro: Coroutine[Any, Any, Any]) -> None:
         """Schedule a coroutine as a tracked background task (drained on shutdown)."""
         task = asyncio.create_task(coro)
         self._background_tasks.add(task)
@@ -1322,7 +1354,7 @@ class AgentLoop:
         on_progress: Callable[..., Awaitable[None]] | None = None,
         on_stream: Callable[[str], Awaitable[None]] | None = None,
         on_stream_end: Callable[..., Awaitable[None]] | None = None,
-        pending_queue: asyncio.Queue | None = None,
+        pending_queue: asyncio.Queue[InboundMessage] | None = None,
         ephemeral: bool = False,
         run_extra_hooks_for_ephemeral: bool = False,
         hooks: list[AgentHook] | None = None,
@@ -1518,27 +1550,33 @@ class AgentLoop:
         # ensure it exists in case this handler is invoked independently.
         if ctx.session is None:
             ctx.session = self.sessions.get_or_create(ctx.session_key)
+        session = ctx.session
         self._remember_unified_session_route(
-            ctx.session,
+            session,
             msg,
             is_user_turn=ctx.original_user_text is not None,
         )
         await ctx.delivery.started()
         if ctx.kind is TurnKind.USER:
-            self.workspace_scopes.persist_message_scope(ctx.session, msg)
+            self.workspace_scopes.persist_message_scope(session, msg)
 
-        if self._restore_runtime_checkpoint(ctx.session):
-            self.sessions.save(ctx.session)
-        if self._restore_pending_user_turn(ctx.session):
-            self.sessions.save(ctx.session)
+        if self._restore_runtime_checkpoint(session):
+            self.sessions.save(session)
+        if self._restore_pending_user_turn(session):
+            self.sessions.save(session)
 
     async def _compact_session(self, ctx: TurnContext) -> None:
-        ctx.session, pending = self.auto_compact.prepare_session(ctx.session, ctx.session_key)
+        session = ctx.require_session()
+        ctx.session, pending = self.auto_compact.prepare_session(
+            session,
+            ctx.session_key,
+        )
         ctx.pending_summary = pending
 
     async def _dispatch_command(self, ctx: TurnContext) -> bool:
         if ctx.kind is TurnKind.SYSTEM:
             return False
+        session = ctx.require_session()
         raw = ctx.msg.content.strip()
         _, automation_metadata = automation_history_overrides(ctx.msg.metadata)
         is_user_turn = (
@@ -1549,7 +1587,7 @@ class AgentLoop:
         )
         cmd_ctx = CommandContext(
             msg=ctx.msg,
-            session=ctx.session,
+            session=session,
             key=ctx.session_key,
             raw=raw,
             loop=self,
@@ -1567,13 +1605,13 @@ class AgentLoop:
             # intentionally clears the session.
             if cmd_ctx.raw.lower() != "/new":
                 ctx.input_persisted_early = self._persist_user_message_early(
-                    ctx.msg, ctx.session, _command=True
+                    ctx.msg, session, _command=True
                 )
-                ctx.session.add_message(
+                session.add_message(
                     "assistant", result.content, _command=True
                 )
-                self._clear_pending_user_turn(ctx.session)
-                self.sessions.save(ctx.session)
+                self._clear_pending_user_turn(session)
+                self.sessions.save(session)
                 if not ctx.ephemeral:
                     await self.runtime_event_publisher.session_turn_persisted(
                         ctx.msg,
@@ -1585,9 +1623,10 @@ class AgentLoop:
         return False
 
     async def _build_turn(self, ctx: TurnContext) -> None:
+        session = ctx.require_session()
         runtime = ctx.runtime
         if runtime is None:
-            runtime = self.runtime_for_session(ctx.session)
+            runtime = self.runtime_for_session(session)
             ctx.runtime = runtime
         if ctx.session_key.startswith("dream:"):
             logger.info(
@@ -1602,7 +1641,7 @@ class AgentLoop:
         )
         if not ctx.ephemeral:
             await self.consolidator.maybe_consolidate_by_tokens(
-                ctx.session,
+                session,
                 runtime=runtime,
                 replay_max_messages=replay_max_messages,
             )
@@ -1617,18 +1656,18 @@ class AgentLoop:
             "max_tokens": self._replay_token_budget(runtime),
             "extend_to_user": is_subagent,
         }
-        ctx.history = ctx.session.get_history(**_hist_kwargs)
+        ctx.history = session.get_history(**_hist_kwargs)
         if is_subagent:
             # Keep the durable internal delivery as an assistant record, but
             # present this completion to the model as fresh follow-up input.
             # Providers without assistant-prefill support drop trailing
             # assistant messages, so using the persisted record as the current
             # prompt would hide an independently dispatched subagent result.
-            if self._persist_subagent_followup(ctx.session, ctx.msg):
+            if self._persist_subagent_followup(session, ctx.msg):
                 logger.debug("Subagent result persisted for session {}", ctx.session_key)
-                self.sessions.save(ctx.session)
+                self.sessions.save(session)
             ctx.input_persisted_early = True
-        ctx.delivery.record_runtime(ctx.runtime)
+        ctx.delivery.record_runtime(runtime)
 
         ctx.request_context = self._request_context_for_turn(ctx)
         if ctx.kind is TurnKind.USER:
@@ -1637,7 +1676,7 @@ class AgentLoop:
         if ctx.kind is TurnKind.USER:
             ctx.input_persisted_early = self._persist_user_message_early(
                 ctx.msg,
-                ctx.session,
+                session,
                 runtime_context_blocks=ctx.runtime_context_blocks,
             )
 
@@ -1647,12 +1686,13 @@ class AgentLoop:
             ctx.on_retry_wait = ctx.delivery.retry_wait_callback()
 
     async def _run_turn(self, ctx: TurnContext) -> None:
+        runtime = ctx.require_runtime()
         if ctx.visible_run_started_at is None:
             ctx.visible_run_started_at = time.time()
         await ctx.delivery.running(started_at=ctx.visible_run_started_at)
         result = await self._run_agent_loop(
             ctx.initial_messages,
-            runtime=ctx.runtime,
+            runtime=runtime,
             on_progress=ctx.on_progress,
             on_stream=ctx.on_stream,
             on_stream_end=ctx.on_stream_end,
@@ -1682,6 +1722,8 @@ class AgentLoop:
             await turn_continuation.maybe_continue_turn(ctx)
 
     async def _persist_turn(self, ctx: TurnContext) -> None:
+        runtime = ctx.require_runtime()
+        session = ctx.require_session()
         turn_continuation.prepare_save_boundary(ctx)
 
         if (
@@ -1702,26 +1744,26 @@ class AgentLoop:
         )
         ctx.turn_latency_ms = max(0, int((time.time() - latency_started_at) * 1000))
         self._save_turn(
-            ctx.session, ctx.all_messages, ctx.save_skip,
+            session, ctx.all_messages, ctx.save_skip,
             turn_latency_ms=ctx.turn_latency_ms,
         )
         ctx.delivery.record_latency(ctx.turn_latency_ms)
         if not ctx.ephemeral:
-            ctx.session.enforce_file_cap(
+            session.enforce_file_cap(
                 on_archive=partial(self.context.memory.raw_archive, session_key=ctx.session_key)
             )
             self._schedule_background(
                 self.consolidator.maybe_consolidate_by_tokens(
-                    ctx.session,
-                    runtime=ctx.runtime,
+                    session,
+                    runtime=runtime,
                     replay_max_messages=replay_max_messages_for_context(
-                        ctx.runtime.context_window_tokens
+                        runtime.context_window_tokens
                     ),
                 )
             )
-        self._clear_pending_user_turn(ctx.session)
-        self._clear_runtime_checkpoint(ctx.session)
-        self.sessions.save(ctx.session)
+        self._clear_pending_user_turn(session)
+        self._clear_runtime_checkpoint(session)
+        self.sessions.save(session)
         if not ctx.ephemeral:
             await self.runtime_event_publisher.session_turn_persisted(
                 ctx.msg,
@@ -1744,7 +1786,7 @@ class AgentLoop:
             return
         ctx.outbound = self._assemble_outbound(
             ctx.msg,
-            ctx.final_content,
+            cast(str, ctx.final_content),
             ctx.stop_reason,
             ctx.had_injections,
             ctx.streamed_content,
@@ -1755,39 +1797,47 @@ class AgentLoop:
 
     def _sanitize_persisted_blocks(
         self,
-        content: list[dict[str, Any]],
+        content: list[object],
         *,
         should_truncate_text: bool = False,
-    ) -> list[dict[str, Any]]:
+    ) -> list[object]:
         """Strip volatile multimodal payloads before writing session history."""
-        filtered: list[dict[str, Any]] = []
+        filtered: list[object] = []
         for block in content:
             if not isinstance(block, dict):
                 filtered.append(block)
                 continue
 
-            if block.get("type") == "image_url" and block.get("image_url", {}).get(
-                "url", ""
+            block_data = cast(dict[str, Any], block)
+            image_url = cast(dict[str, Any], block_data.get("image_url", {}))
+            if block_data.get("type") == "image_url" and str(
+                image_url.get("url", "")
             ).startswith("data:image/"):
-                path = (block.get("_meta") or {}).get("path", "")
-                filtered.append({"type": "text", "text": image_placeholder_text(path)})
+                internal_meta = cast(dict[str, Any], block_data.get("_meta") or {})
+                path = cast(str, internal_meta.get("path", ""))
+                filtered.append(
+                    {"type": "text", "text": image_placeholder_text(path)}
+                )
                 continue
 
-            if block.get("type") == "text" and isinstance(block.get("text"), str):
-                text = block["text"]
+            if block_data.get("type") == "text" and isinstance(
+                block_data.get("text"),
+                str,
+            ):
+                text = cast(str, block_data["text"])
                 if should_truncate_text and len(text) > self.max_tool_result_chars:
                     text = truncate_text_fn(text, self.max_tool_result_chars)
-                filtered.append({**block, "text": text})
+                filtered.append({**block_data, "text": text})
                 continue
 
-            filtered.append(block)
+            filtered.append(block_data)
 
         return filtered
 
     def _save_turn(
         self,
         session: Session,
-        messages: list[dict],
+        messages: list[dict[str, Any]],
         skip: int,
         *,
         turn_latency_ms: int | None = None,
@@ -1799,8 +1849,10 @@ class AgentLoop:
             str(tc["id"])
             for m in session.messages
             if m.get("role") == "assistant"
-            for tc in m.get("tool_calls") or []
-            if isinstance(tc, dict) and tc.get("id")
+            for tc_value in cast(Iterable[object], m.get("tool_calls") or [])
+            if isinstance(tc_value, dict)
+            for tc in (cast(dict[str, Any], tc_value),)
+            if tc.get("id")
         }
         fulfilled_tool_call_ids = {
             str(m["tool_call_id"])
@@ -1810,9 +1862,11 @@ class AgentLoop:
         last_assistant_idx: int | None = None
         for m in messages[skip:]:
             entry = dict(m)
-            internal_meta = entry.pop("_meta", None)
+            internal_meta = cast(object, entry.pop("_meta", None))
             runtime_context_meta = (
-                internal_meta.get(RUNTIME_CONTEXT_MESSAGE_META)
+                cast(dict[str, Any], internal_meta).get(
+                    RUNTIME_CONTEXT_MESSAGE_META
+                )
                 if isinstance(internal_meta, dict)
                 else None
             )
@@ -1838,7 +1892,10 @@ class AgentLoop:
                 if isinstance(content, str) and len(content) > self.max_tool_result_chars:
                     entry["content"] = truncate_text_fn(content, self.max_tool_result_chars)
                 elif isinstance(content, list):
-                    filtered = self._sanitize_persisted_blocks(content, should_truncate_text=True)
+                    filtered = self._sanitize_persisted_blocks(
+                        cast(list[object], content),
+                        should_truncate_text=True,
+                    )
                     if not filtered:
                         # Preserve the tool_call/result pair after block filtering.
                         filtered = [
@@ -1847,7 +1904,9 @@ class AgentLoop:
                     entry["content"] = filtered
             elif role == "user":
                 if isinstance(content, list):
-                    filtered = self._sanitize_persisted_blocks(content)
+                    filtered = self._sanitize_persisted_blocks(
+                        cast(list[object], content),
+                    )
                     if not filtered:
                         continue
                     entry["content"] = filtered
@@ -1859,8 +1918,13 @@ class AgentLoop:
                 last_assistant_idx = len(session.messages) - 1
                 declared_tool_call_ids.update(
                     str(tc["id"])
-                    for tc in entry.get("tool_calls") or []
-                    if isinstance(tc, dict) and tc.get("id")
+                    for tc_value in cast(
+                        Iterable[object],
+                        entry.get("tool_calls") or [],
+                    )
+                    if isinstance(tc_value, dict)
+                    for tc in (cast(dict[str, Any], tc_value),)
+                    if tc.get("id")
                 )
         if turn_latency_ms is not None and last_assistant_idx is not None:
             session.messages[last_assistant_idx]["latency_ms"] = int(turn_latency_ms)
@@ -1875,7 +1939,12 @@ class AgentLoop:
         """
         if not msg.content:
             return False
-        task_id = msg.metadata.get("subagent_task_id") if isinstance(msg.metadata, dict) else None
+        metadata_value = cast(object, msg.metadata)
+        task_id = (
+            msg.metadata.get("subagent_task_id")
+            if isinstance(metadata_value, dict)
+            else None
+        )
         if task_id and any(
             m.get("injected_event") == "subagent_result" and m.get("subagent_task_id") == task_id
             for m in session.messages
@@ -1921,29 +1990,44 @@ class AgentLoop:
         """Materialize an unfinished turn into session history before a new request."""
         from datetime import datetime
 
-        checkpoint = session.metadata.get(self._RUNTIME_CHECKPOINT_KEY)
+        checkpoint = cast(
+            object,
+            session.metadata.get(self._RUNTIME_CHECKPOINT_KEY),
+        )
         if not isinstance(checkpoint, dict):
             return False
+        checkpoint_data = cast(dict[str, Any], checkpoint)
 
-        assistant_message = checkpoint.get("assistant_message")
-        completed_tool_results = checkpoint.get("completed_tool_results") or []
-        pending_tool_calls = checkpoint.get("pending_tool_calls") or []
+        assistant_message = cast(object, checkpoint_data.get("assistant_message"))
+        completed_tool_results = cast(
+            Iterable[object],
+            checkpoint_data.get("completed_tool_results") or [],
+        )
+        pending_tool_calls = cast(
+            Iterable[object],
+            checkpoint_data.get("pending_tool_calls") or [],
+        )
 
         restored_messages: list[dict[str, Any]] = []
         if isinstance(assistant_message, dict):
-            restored = dict(assistant_message)
+            restored = dict(cast(dict[str, Any], assistant_message))
             restored.setdefault("timestamp", datetime.now().isoformat())
             restored_messages.append(restored)
         for message in completed_tool_results:
             if isinstance(message, dict):
-                restored = dict(message)
+                restored = dict(cast(dict[str, Any], message))
                 restored.setdefault("timestamp", datetime.now().isoformat())
                 restored_messages.append(restored)
         for tool_call in pending_tool_calls:
             if not isinstance(tool_call, dict):
                 continue
-            tool_id = tool_call.get("id")
-            name = ((tool_call.get("function") or {}).get("name")) or "tool"
+            tool_call_data = cast(dict[str, Any], tool_call)
+            tool_id = tool_call_data.get("id")
+            function_data = cast(
+                dict[str, Any],
+                tool_call_data.get("function") or {},
+            )
+            name = function_data.get("name") or "tool"
             restored_messages.append(
                 {
                     "role": "tool",

nanobot/agent/memory.py

@@ -1,5 +1,10 @@
 """Memory system: pure file I/O store and lightweight Consolidator."""
 
+# Tool schemas are installed by the ``@tool_parameters`` class decorator at
+# runtime; static analyzers cannot observe that it clears ``parameters`` from
+# ``__abstractmethods__`` before these classes are instantiated.
+# pyright: reportAbstractUsage=false, reportPrivateUsage=false
+
 from __future__ import annotations
 
 import asyncio
@@ -11,7 +16,7 @@ import weakref
 from contextlib import suppress
 from datetime import datetime
 from pathlib import Path
-from typing import TYPE_CHECKING, Any, Callable, Iterator
+from typing import TYPE_CHECKING, Any, Callable, Iterator, cast
 
 from loguru import logger
 
@@ -38,6 +43,7 @@ from nanobot.utils.workspace_prompts import (
 )
 
 if TYPE_CHECKING:
+    from nanobot.agent.tools.registry import ToolRegistry
     from nanobot.utils.llm_runtime import LLMRuntime
 
 # ---------------------------------------------------------------------------
@@ -58,7 +64,7 @@ class DreamRunProgress:
         **_kwargs: Any,
     ) -> None:
         if any(
-            isinstance(event, dict) and event.get("phase") == "error"
+            isinstance(cast(object, event), dict) and event.get("phase") == "error"
             for event in tool_events or ()
         ):
             self.had_tool_errors = True
@@ -474,11 +480,11 @@ class MemoryStore:
                     line = line.strip()
                     if line:
                         try:
-                            parsed = json.loads(line)
+                            parsed: object = json.loads(line)
                         except json.JSONDecodeError:
                             continue
                         if isinstance(parsed, dict):
-                            entries.append(parsed)
+                            entries.append(cast(dict[str, Any], parsed))
 
         return entries
 
@@ -496,8 +502,8 @@ class MemoryStore:
                 lines = [line for line in data.split("\n") if line.strip()]
                 if not lines:
                     return None
-                parsed = json.loads(lines[-1])
-                return parsed if isinstance(parsed, dict) else None
+                parsed: object = json.loads(lines[-1])
+                return cast(dict[str, Any], parsed) if isinstance(parsed, dict) else None
         except (FileNotFoundError, json.JSONDecodeError, UnicodeDecodeError):
             return None
 
@@ -612,7 +618,7 @@ class MemoryStore:
             ("USER.md", self.user_file),
             ("memory/MEMORY.md", self.memory_file),
         ]
-        blocks = []
+        blocks: list[str] = []
         for label, path in files:
             try:
                 content = path.read_text(encoding="utf-8") if path.exists() else ""
@@ -633,7 +639,7 @@ class MemoryStore:
             return ""
         return self._git.summarize_working_tree(list(self._DREAM_CONTENT_PATHS))
 
-    def build_dream_tools(self):
+    def build_dream_tools(self) -> ToolRegistry:
         """Build the restricted tool registry used by Dream runs."""
         from nanobot.agent.skills import BUILTIN_SKILLS_DIR
         from nanobot.agent.tools.apply_patch import ApplyPatchTool
@@ -684,17 +690,15 @@ class MemoryStore:
     ) -> bool:
         """Return True only when a Dream turn completed without tool failures."""
         metadata = getattr(resp, "metadata", None)
-        return (
-            not had_tool_errors
-            and isinstance(metadata, dict)
-            and metadata.get("_stop_reason") == "completed"
-        )
+        if had_tool_errors or not isinstance(metadata, dict):
+            return False
+        return cast(dict[str, Any], metadata).get("_stop_reason") == "completed"
 
     # -- message formatting utility ------------------------------------------
 
     @staticmethod
-    def _format_messages(messages: list[dict]) -> str:
-        lines = []
+    def _format_messages(messages: list[dict[str, Any]]) -> str:
+        lines: list[str] = []
         for message in messages:
             content = content_with_media_breadcrumbs(
                 message.get("role"),
@@ -703,16 +707,22 @@ class MemoryStore:
             )
             if not content:
                 continue
-            tools = f" [tools: {', '.join(message['tools_used'])}]" if message.get("tools_used") else ""
+            tools_used = message.get("tools_used")
+            tools = (
+                f" [tools: {', '.join(cast(list[str], tools_used))}]"
+                if tools_used
+                else ""
+            )
+            timestamp = cast(str, message.get("timestamp", "?"))
+            role = cast(str, message["role"])
             lines.append(
-                f"[{message.get('timestamp', '?')[:16]}] "
-                f"{message['role'].upper()}{tools}: {content}"
+                f"[{timestamp[:16]}] {role.upper()}{tools}: {content}"
             )
         return "\n".join(lines)
 
     def raw_archive(
         self,
-        messages: list[dict],
+        messages: list[dict[str, Any]],
         *,
         max_chars: int | None = None,
         session_key: str | None = None,
@@ -766,9 +776,9 @@ class MemoryStore:
         Only current base64url-encoded Dream session keys are considered.
         Non-dream session files are never touched.
         """
-        dream_files = []
+        dream_files: list[Path] = []
         for path in sessions_dir.glob("*.jsonl"):
-            decoded_key = SessionManager._decode_storage_key(path.stem)
+            decoded_key = SessionManager.decode_storage_key(path.stem)
             if decoded_key is not None and decoded_key.startswith("dream:"):
                 dream_files.append(path)
         dream_files.sort(key=lambda p: p.stat().st_mtime)
@@ -943,7 +953,13 @@ class Consolidator:
         channel = session.key.split(":", 1)[0] if ":" in session.key else None
         # Include archived summary in estimation so the budget accounts for it.
         meta = session.metadata.get("_last_summary")
-        summary = meta.get("text") if isinstance(meta, dict) else (meta if isinstance(meta, str) else None)
+        summary = (
+            cast(dict[str, Any], meta).get("text")
+            if isinstance(meta, dict)
+            else meta
+            if isinstance(meta, str)
+            else None
+        )
         probe_messages = self._build_messages(
             history=history,
             current_message="[token-probe]",
@@ -976,11 +992,11 @@ class Consolidator:
 
     async def archive(
         self,
-        messages: list[dict],
+        messages: list[dict[str, Any]],
         *,
         runtime: LLMRuntime,
         session_key: str | None = None,
-        summary_messages: list[dict] | None = None,
+        summary_messages: list[dict[str, Any]] | None = None,
     ) -> str | None:
         """Summarize messages via LLM and append to history.jsonl.
 

nanobot/agent/model_presets.py

@@ -5,9 +5,8 @@ from __future__ import annotations
 from collections.abc import Callable, Mapping
 from dataclasses import replace
 from pathlib import Path
-from typing import Any
 
-from nanobot.config.schema import ModelPresetConfig
+from nanobot.config.schema import Config, ModelPresetConfig
 from nanobot.providers.base import LLMProvider
 from nanobot.providers.factory import ProviderSnapshot, build_provider_snapshot
 
@@ -22,7 +21,7 @@ def default_selection_signature(
     return (model_preset, *signature[:2]) if signature else None
 
 
-def configured_model_presets(config: Any) -> dict[str, ModelPresetConfig]:
+def configured_model_presets(config: Config) -> dict[str, ModelPresetConfig]:
     return {**config.model_presets, "default": config.resolve_default_preset()}
 
 
@@ -41,7 +40,7 @@ def load_model_preset_catalog(
 
 
 def make_preset_snapshot_loader(
-    config: Any,
+    config: Config,
     provider_snapshot_loader: Callable[..., ProviderSnapshot] | None,
 ) -> PresetSnapshotLoader:
     if provider_snapshot_loader is not None:

nanobot/agent/model_runtime.py

@@ -5,6 +5,7 @@ from __future__ import annotations
 from collections.abc import Callable, Mapping
 from dataclasses import replace
 from types import MappingProxyType
+from typing import cast
 
 from nanobot.agent import model_presets as preset_helpers
 from nanobot.config.schema import Config, ModelPresetConfig
@@ -139,7 +140,7 @@ class ModelRuntimeResolver:
 
     def select_model(self, model: str) -> LLMRuntime:
         """Change the default model without reconstructing downstream consumers."""
-        if not isinstance(model, str) or not model.strip():
+        if not isinstance(cast(object, model), str) or not model.strip():
             raise ValueError("model must be a non-empty string")
         self._runtime = replace(
             self._runtime,
@@ -150,8 +151,9 @@ class ModelRuntimeResolver:
 
     def select_context_window(self, context_window_tokens: int) -> LLMRuntime:
         """Change the default context limit for future admissions."""
-        if not isinstance(context_window_tokens, int) or isinstance(
-            context_window_tokens,
+        raw_context_window = cast(object, context_window_tokens)
+        if not isinstance(raw_context_window, int) or isinstance(
+            raw_context_window,
             bool,
         ):
             raise TypeError("context_window_tokens must be an integer")

nanobot/agent/progress_hook.py

@@ -4,7 +4,7 @@ from __future__ import annotations
 
 import inspect
 import json
-from typing import Any, Awaitable, Callable
+from typing import Any, Awaitable, Callable, cast
 
 from loguru import logger
 
@@ -124,7 +124,7 @@ class AgentProgressHook(AgentHook):
         arguments = event.get("arguments")
         if not isinstance(arguments, dict):
             arguments = {}
-        payload = {
+        payload: dict[str, Any] = {
             "version": 1,
             "phase": phase,
             "call_id": str(call_id),
@@ -169,7 +169,7 @@ class AgentProgressHook(AgentHook):
             tool_events = [build_tool_event_start_payload(tc) for tc in context.tool_calls]
             await invoke_on_progress(
                 self._on_progress,
-                tool_hint,
+                cast(str, tool_hint),
                 tool_hint=True,
                 tool_events=tool_events,
             )

nanobot/agent/runner.py

@@ -5,10 +5,11 @@ from __future__ import annotations
 import asyncio
 import inspect
 import os
+from collections.abc import Awaitable, Callable, Iterable
 from copy import deepcopy
 from dataclasses import dataclass, field
 from pathlib import Path
-from typing import Any, Callable
+from typing import Any, cast
 
 from loguru import logger
 
@@ -48,6 +49,10 @@ from nanobot.utils.runtime import (
 )
 
 GoalContinueMessage = str | Callable[[], str | None]
+ProgressCallback = Callable[[str], Awaitable[None]]
+RetryWaitCallback = Callable[[str], Awaitable[None]]
+CheckpointCallback = Callable[[dict[str, Any]], Awaitable[None]]
+InjectionCallback = Callable[..., Awaitable[Iterable[Any] | None]]
 
 _DEFAULT_ERROR_MESSAGE = "Sorry, I encountered an error calling the AI model."
 _ARREARAGE_ERROR_MESSAGE = (
@@ -90,11 +95,11 @@ class AgentRunSpec:
     session_key: str | None = None
     context_block_limit: int | None = None
     provider_retry_mode: str = "standard"
-    progress_callback: Any | None = None
+    progress_callback: ProgressCallback | None = None
     stream_progress_deltas: bool = True
-    retry_wait_callback: Any | None = None
-    checkpoint_callback: Any | None = None
-    injection_callback: Any | None = None
+    retry_wait_callback: RetryWaitCallback | None = None
+    checkpoint_callback: CheckpointCallback | None = None
+    injection_callback: InjectionCallback | None = None
     llm_timeout_s: float | None = None
     goal_active_predicate: Callable[[], bool] | None = None
     goal_continue_message: GoalContinueMessage | None = None
@@ -131,8 +136,10 @@ class AgentRunner:
         def _to_blocks(value: Any) -> list[dict[str, Any]]:
             if isinstance(value, list):
                 return [
-                    item if isinstance(item, dict) else {"type": "text", "text": str(item)}
-                    for item in value
+                    cast(dict[str, Any], item)
+                    if isinstance(item, dict)
+                    else {"type": "text", "text": str(item)}
+                    for item in cast(list[Any], value)
                 ]
             if value is None:
                 return []
@@ -158,25 +165,37 @@ class AgentRunner:
                 merged = dict(messages[-1])
                 left_meta = merged.get("_meta")
                 right_meta = injection.get("_meta")
+                left_meta_dict = cast(dict[str, Any], left_meta) if isinstance(left_meta, dict) else None
+                right_meta_dict = (
+                    cast(dict[str, Any], right_meta) if isinstance(right_meta, dict) else None
+                )
                 left_marker = (
-                    left_meta.get(RUNTIME_CONTEXT_MESSAGE_META)
-                    if isinstance(left_meta, dict)
+                    left_meta_dict.get(RUNTIME_CONTEXT_MESSAGE_META)
+                    if left_meta_dict is not None
                     else None
                 )
                 right_marker = (
-                    right_meta.get(RUNTIME_CONTEXT_MESSAGE_META)
-                    if isinstance(right_meta, dict)
+                    right_meta_dict.get(RUNTIME_CONTEXT_MESSAGE_META)
+                    if right_meta_dict is not None
                     else None
                 )
+                left_marker_dict = (
+                    cast(dict[str, Any], left_marker) if isinstance(left_marker, dict) else None
+                )
+                right_marker_dict = (
+                    cast(dict[str, Any], right_marker) if isinstance(right_marker, dict) else None
+                )
+                empty_sources: list[str] = []
+                empty_blocks: list[dict[str, Any]] = []
                 detached_left = (
-                    detach_runtime_context(merged.get("content"), left_marker)
-                    if isinstance(left_marker, dict)
-                    else (merged.get("content"), [], [])
+                    detach_runtime_context(merged.get("content"), left_marker_dict)
+                    if left_marker_dict is not None
+                    else (merged.get("content"), empty_sources, empty_blocks)
                 )
                 detached_right = (
-                    detach_runtime_context(injection.get("content"), right_marker)
-                    if isinstance(right_marker, dict)
-                    else (injection.get("content"), [], [])
+                    detach_runtime_context(injection.get("content"), right_marker_dict)
+                    if right_marker_dict is not None
+                    else (injection.get("content"), empty_sources, empty_blocks)
                 )
                 if detached_left is not None and detached_right is not None:
                     left_content, left_sources, left_blocks = detached_left
@@ -189,9 +208,9 @@ class AgentRunner:
                             [*left_sources, *right_sources],
                             context_blocks,
                         )
-                        internal_meta = dict(left_meta) if isinstance(left_meta, dict) else {}
-                        if isinstance(right_meta, dict):
-                            for key, value in right_meta.items():
+                        internal_meta = dict(left_meta_dict) if left_meta_dict is not None else {}
+                        if right_meta_dict is not None:
+                            for key, value in right_meta_dict.items():
                                 internal_meta.setdefault(key, value)
                         internal_meta[RUNTIME_CONTEXT_MESSAGE_META] = marker
                         merged["_meta"] = internal_meta
@@ -302,11 +321,11 @@ class AgentRunner:
         for item in items:
             if item is None:
                 continue
-            if isinstance(item, dict) and item.get("role") == "user" and "content" in item:
-                if self._has_injection_content(item.get("content")):
-                    injected_messages.append(item)
-                continue
             if isinstance(item, dict):
+                message_item = cast(dict[str, Any], item)
+                if message_item.get("role") == "user" and "content" in message_item:
+                    if self._has_injection_content(message_item.get("content")):
+                        injected_messages.append(message_item)
                 continue
             content = getattr(item, "content") if hasattr(item, "content") else str(item)
             if self._has_injection_content(content):
@@ -327,7 +346,7 @@ class AgentRunner:
         if isinstance(content, str):
             return bool(content.strip())
         if isinstance(content, list):
-            return bool(content)
+            return bool(cast(list[Any], content))
         return True
 
     async def run(self, spec: AgentRunSpec) -> AgentRunResult:
@@ -592,7 +611,7 @@ class AgentRunner:
             if response.finish_reason == "length" and not is_blank_text(clean):
                 if len(length_recovery_parts) < _MAX_LENGTH_RECOVERIES:
                     length_recovery_parts.append(
-                        _restore_outer_whitespace(clean, original_content)
+                        _restore_outer_whitespace(clean or "", original_content)
                     )
                     logger.info(
                         "Output truncated on turn {} for {} ({}/{}); continuing",
@@ -609,7 +628,7 @@ class AgentRunner:
                         reasoning_content=response.reasoning_content,
                         thinking_blocks=response.thinking_blocks,
                     ))
-                    messages.append(build_length_recovery_message(clean))
+                    messages.append(build_length_recovery_message(clean or ""))
                     await hook.after_iteration(context)
                     continue
 
@@ -626,7 +645,7 @@ class AgentRunner:
             ):
                 await hook.on_stream(
                     context,
-                    _restore_outer_whitespace(clean, original_content),
+                    _restore_outer_whitespace(clean or "", original_content),
                 )
                 context.streamed_content = True
 
@@ -717,7 +736,7 @@ class AgentRunner:
             if length_recovery_parts:
                 final_content = (
                     "".join(length_recovery_parts)
-                    + _restore_outer_whitespace(clean, original_content)
+                    + _restore_outer_whitespace(clean or "", original_content)
                 ).strip()
             else:
                 final_content = clean
@@ -798,7 +817,7 @@ class AgentRunner:
         context: AgentHookContext,
         *,
         malformed_retry: bool = False,
-    ):
+    ) -> LLMResponse:
         timeout_s: float | None = spec.llm_timeout_s
         if timeout_s is None:
             # Default to a finite timeout to avoid per-session lock starvation when an LLM
@@ -809,7 +828,7 @@ class AgentRunner:
                 timeout_s = float(raw)
             except (TypeError, ValueError):
                 timeout_s = 300.0
-        if timeout_s is not None and timeout_s <= 0:
+        if timeout_s <= 0:
             timeout_s = None
 
         kwargs = self._build_request_kwargs(
@@ -818,10 +837,11 @@ class AgentRunner:
             tools=spec.tools.get_definitions(),
         )
         wants_streaming = hook.wants_streaming()
+        progress_callback = spec.progress_callback
         wants_progress_streaming = (
             not wants_streaming
             and spec.stream_progress_deltas
-            and spec.progress_callback is not None
+            and progress_callback is not None
             and getattr(spec.runtime.provider, "supports_progress_deltas", False) is True
         )
 
@@ -894,7 +914,9 @@ class AgentRunner:
                         await hook.emit_reasoning_end()
                         progress_state["reasoning_open"] = False
                     context.streamed_content = True
-                    await spec.progress_callback(incremental)
+                    callback = progress_callback
+                    if callback is not None:
+                        await callback(incremental)
 
             coro = spec.runtime.provider.chat_stream_with_retry(
                 **kwargs,
@@ -1038,7 +1060,7 @@ class AgentRunner:
         self,
         spec: AgentRunSpec,
         messages: list[dict[str, Any]],
-    ):
+    ) -> LLMResponse:
         retry_messages = self._finalization_retry_messages(messages)
         return await self._request_no_tools(spec, retry_messages)
 
@@ -1224,7 +1246,7 @@ class AgentRunner:
                 ))
                 tool_results.extend(batch_results)
             else:
-                batch_results = []
+                batch_results: list[tuple[Any, dict[str, str], BaseException | None]] = []
                 for tool_call in batch:
                     result = await self._run_tool(
                         spec,
@@ -1273,12 +1295,17 @@ class AgentRunner:
             if spec.fail_on_tool_error:
                 return lookup_error + hint, event, RuntimeError(lookup_error)
             return lookup_error + hint, event, None
-        prepare_call = getattr(spec.tools, "prepare_call", None)
+        prepare_call = cast(
+            Callable[[str, Any], object] | None,
+            getattr(spec.tools, "prepare_call", None),
+        )
         tool, params, prep_error = None, tool_call.arguments, None
         if callable(prepare_call):
             prepared = prepare_call(tool_call.name, tool_call.arguments)
-            if isinstance(prepared, tuple) and len(prepared) == 3:
-                tool, params, prep_error = prepared
+            if isinstance(prepared, tuple):
+                prepared_tuple = cast(tuple[object, ...], prepared)
+                if len(prepared_tuple) == 3:
+                    tool, params, prep_error = cast(tuple[Any, Any, str | None], prepared_tuple)
         if prep_error:
             event = {
                 "name": tool_call.name,
@@ -1490,7 +1517,7 @@ class AgentRunner:
         batches: list[list[ToolCallRequest]] = []
         current: list[ToolCallRequest] = []
         for tool_call in tool_calls:
-            get_tool = getattr(spec.tools, "get", None)
+            get_tool = cast(Callable[[str], Any] | None, getattr(spec.tools, "get", None))
             tool = get_tool(tool_call.name) if callable(get_tool) else None
             can_batch = bool(tool and tool.concurrency_safe)
             if can_batch:

nanobot/agent/skills.py

@@ -5,6 +5,7 @@ import os
 import re
 import shutil
 from pathlib import Path
+from typing import Any, cast
 
 import yaml
 
@@ -144,7 +145,7 @@ class SkillsLoader:
                 skill_name = entry["name"]
                 meta = self._get_skill_meta(skill_name)
                 available = self._check_requirements(meta)
-                desc = self._get_skill_description(skill_name)
+                desc = self.get_skill_description(skill_name)
                 suffix = ""
                 if not available:
                     missing = self._get_missing_requirements(meta)
@@ -155,18 +156,18 @@ class SkillsLoader:
         return "\n\n".join(sections)
 
     @staticmethod
-    def _requirement_lists(skill_meta: dict) -> tuple[list[str], list[str]]:
+    def _requirement_lists(skill_meta: dict[str, Any]) -> tuple[list[str], list[str]]:
         """Return (bins, env) lists from skill metadata, tolerating null/wrong shapes."""
-        requires = skill_meta.get("requires") or {}
-        if not isinstance(requires, dict):
+        requires = cast(dict[str, Any], skill_meta.get("requires") or {})
+        if not isinstance(skill_meta.get("requires") or {}, dict):
             return [], []
-        bins_raw = requires.get("bins") or []
-        env_raw = requires.get("env") or []
-        bins = [str(v) for v in bins_raw if isinstance(v, str) and v.strip()] if isinstance(bins_raw, list) else []
-        env = [str(v) for v in env_raw if isinstance(v, str) and v.strip()] if isinstance(env_raw, list) else []
+        bins_raw: object = requires.get("bins") or []
+        env_raw: object = requires.get("env") or []
+        bins = [value for value in cast(list[object], bins_raw) if isinstance(value, str) and value.strip()] if isinstance(bins_raw, list) else []
+        env = [value for value in cast(list[object], env_raw) if isinstance(value, str) and value.strip()] if isinstance(env_raw, list) else []
         return bins, env
 
-    def _get_missing_requirements(self, skill_meta: dict) -> str:
+    def _get_missing_requirements(self, skill_meta: dict[str, Any]) -> str:
         """Get a description of missing requirements."""
         required_bins, required_env_vars = self._requirement_lists(skill_meta)
         return ", ".join(
@@ -190,11 +191,12 @@ class SkillsLoader:
             "missing_env": [value for value in env if not os.environ.get(value)],
         }
 
-    def _get_skill_description(self, name: str) -> str:
+    def get_skill_description(self, name: str) -> str:
         """Get the description of a skill from its frontmatter."""
         meta = self.get_skill_metadata(name)
-        if meta and meta.get("description"):
-            return meta["description"]
+        description = meta.get("description") if meta else None
+        if isinstance(description, str) and description:
+            return description
         return name  # Fallback to skill name
 
     def _strip_frontmatter(self, content: str) -> str:
@@ -206,13 +208,13 @@ class SkillsLoader:
             return content[match.end():].strip()
         return content
 
-    def _parse_nanobot_metadata(self, raw: object) -> dict:
+    def _parse_nanobot_metadata(self, raw: object) -> dict[str, Any]:
         """Extract nanobot/openclaw metadata from a frontmatter field.
 
         ``raw`` may be a dict (already parsed by yaml.safe_load) or a JSON str.
         """
         if isinstance(raw, dict):
-            data = raw
+            data = cast(dict[str, Any], raw)
         elif isinstance(raw, str):
             try:
                 data = json.loads(raw)
@@ -222,17 +224,18 @@ class SkillsLoader:
             return {}
         if not isinstance(data, dict):
             return {}
-        payload = data.get("nanobot", data.get("openclaw", {}))
-        return payload if isinstance(payload, dict) else {}
+        data_object = cast(dict[str, Any], data)
+        payload = data_object.get("nanobot", data_object.get("openclaw", {}))
+        return cast(dict[str, Any], payload) if isinstance(payload, dict) else {}
 
-    def _check_requirements(self, skill_meta: dict) -> bool:
+    def _check_requirements(self, skill_meta: dict[str, Any]) -> bool:
         """Check if skill requirements are met (bins, env vars)."""
         required_bins, required_env_vars = self._requirement_lists(skill_meta)
         return all(shutil.which(cmd) for cmd in required_bins) and all(
             os.environ.get(var) for var in required_env_vars
         )
 
-    def _get_skill_meta(self, name: str) -> dict:
+    def _get_skill_meta(self, name: str) -> dict[str, Any]:
         """Get nanobot metadata for a skill (cached in frontmatter)."""
         raw_meta = self.get_skill_metadata(name) or {}
         return self._parse_nanobot_metadata(raw_meta.get("metadata"))
@@ -249,7 +252,7 @@ class SkillsLoader:
             )
         ]
 
-    def get_skill_metadata(self, name: str) -> dict | None:
+    def get_skill_metadata(self, name: str) -> dict[str, object] | None:
         """
         Get metadata from a skill's frontmatter.
 
@@ -274,6 +277,6 @@ class SkillsLoader:
         # yaml.safe_load returns native types (int, bool, list, etc.);
         # keep values as-is so downstream consumers get correct types.
         metadata: dict[str, object] = {}
-        for key, value in parsed.items():
+        for key, value in cast(dict[object, object], parsed).items():
             metadata[str(key)] = value
         return metadata

nanobot/agent/subagent.py

@@ -7,12 +7,12 @@ import uuid
 import warnings
 from dataclasses import dataclass, field
 from pathlib import Path
-from typing import Any, Callable
+from typing import Any, Callable, TypedDict
 
 from loguru import logger
 
 from nanobot.agent.hook import AgentHook, AgentHookContext
-from nanobot.agent.runner import AgentRunner, AgentRunSpec
+from nanobot.agent.runner import AgentRunner, AgentRunResult, AgentRunSpec
 from nanobot.agent.tools.base import ToolResult
 from nanobot.agent.tools.context import (
     RequestContext,
@@ -38,6 +38,12 @@ from nanobot.utils.llm_runtime import LLMRuntime
 from nanobot.utils.prompt_templates import render_template
 
 
+class _SubagentOrigin(TypedDict):
+    channel: str
+    chat_id: str
+    session_key: str | None
+
+
 @dataclass(slots=True)
 class SubagentStatus:
     """Real-time status of a running subagent."""
@@ -48,8 +54,8 @@ class SubagentStatus:
     started_at: float          # time.monotonic()
     phase: str = "initializing"  # initializing | awaiting_tools | tools_completed | final_response | done | error
     iteration: int = 0
-    tool_events: list = field(default_factory=list)   # [{name, status, detail}, ...]
-    usage: dict = field(default_factory=dict)          # token usage
+    tool_events: list[dict[str, str]] = field(default_factory=list)
+    usage: dict[str, int] = field(default_factory=dict)
     stop_reason: str | None = None
     error: str | None = None
 
@@ -237,7 +243,11 @@ class SubagentManager:
             runtime = runtime.with_generation_overrides(temperature=temperature)
         task_id = str(uuid.uuid4())[:8]
         display_label = label or task[:30] + ("..." if len(task) > 30 else "")
-        origin = {"channel": origin_channel, "chat_id": origin_chat_id, "session_key": session_key}
+        origin: _SubagentOrigin = {
+            "channel": origin_channel,
+            "chat_id": origin_chat_id,
+            "session_key": session_key,
+        }
 
         status = SubagentStatus(
             task_id=task_id,
@@ -263,7 +273,7 @@ class SubagentManager:
         if session_key:
             self._session_tasks.setdefault(session_key, set()).add(task_id)
 
-        def _cleanup(_: asyncio.Task) -> None:
+        def _cleanup(_: asyncio.Task[str]) -> None:
             self._running_tasks.pop(task_id, None)
             self._task_statuses.pop(task_id, None)
             if session_key and (ids := self._session_tasks.get(session_key)):
@@ -296,7 +306,7 @@ class SubagentManager:
             runtime = runtime.with_generation_overrides(temperature=temperature)
         task_id = str(uuid.uuid4())[:8]
         display_label = label or task[:30] + ("..." if len(task) > 30 else "")
-        origin = {
+        origin: _SubagentOrigin = {
             "channel": origin_channel,
             "chat_id": origin_chat_id,
             "session_key": session_key,
@@ -343,7 +353,7 @@ class SubagentManager:
         task_id: str,
         task: str,
         label: str,
-        origin: dict[str, str],
+        origin: _SubagentOrigin,
         status: SubagentStatus,
         runtime: LLMRuntime,
         origin_message_id: str | None = None,
@@ -354,7 +364,7 @@ class SubagentManager:
         """Execute the subagent task and announce the result."""
         logger.info("Subagent [{}] starting task: {}", task_id, label)
 
-        async def _on_checkpoint(payload: dict) -> None:
+        async def _on_checkpoint(payload: dict[str, Any]) -> None:
             status.phase = payload.get("phase", status.phase)
             status.iteration = payload.get("iteration", status.iteration)
 
@@ -456,7 +466,7 @@ class SubagentManager:
         label: str,
         task: str,
         result: str,
-        origin: dict[str, str],
+        origin: _SubagentOrigin,
         status: str,
         origin_message_id: str | None = None,
     ) -> None:
@@ -496,7 +506,7 @@ class SubagentManager:
         logger.debug("Subagent [{}] announced result to {}:{}", task_id, origin['channel'], origin['chat_id'])
 
     @staticmethod
-    def _format_partial_progress(result) -> str:
+    def _format_partial_progress(result: AgentRunResult) -> str:
         completed = [e for e in result.tool_events if e["status"] == "ok"]
         failure = next((e for e in reversed(result.tool_events) if e["status"] == "error"), None)
         lines: list[str] = []

nanobot/agent/tools/apply_patch.py

@@ -5,10 +5,10 @@ from __future__ import annotations
 import difflib
 from dataclasses import dataclass
 from pathlib import Path
-from typing import Any
+from typing import Any, cast
 
 from nanobot.agent.tools.base import ToolResult, tool_parameters
-from nanobot.agent.tools.filesystem import _FsTool
+from nanobot.agent.tools.filesystem import _FsTool  # pyright: ignore[reportPrivateUsage]
 from nanobot.agent.tools.schema import (
     ArraySchema,
     BooleanSchema,
@@ -134,7 +134,7 @@ class ApplyPatchTool(_FsTool):
 
     async def execute(
         self,
-        edits: list[dict] | None = None,
+        edits: list[object] | None = None,
         dry_run: bool = False,
         **kwargs: Any,
     ) -> str:
@@ -145,9 +145,10 @@ class ApplyPatchTool(_FsTool):
             writes: dict[Path, str] = {}
             summaries: list[_PatchSummary] = []
 
-            for edit in edits:
-                if not isinstance(edit, dict):
+            for edit_value in edits:
+                if not isinstance(edit_value, dict):
                     raise _PatchError("each edit must be an object")
+                edit = cast(dict[str, Any], edit_value)
                 raw_path = edit.get("path")
                 if not isinstance(raw_path, str):
                     raise _PatchError("path required for edit")
@@ -161,6 +162,7 @@ class ApplyPatchTool(_FsTool):
                     new_text = edit.get("new_text")
                     if new_text is None:
                         raise _PatchError(f"new_text required for add: {path}")
+                    new_text = cast(str, new_text)
 
                     pending = writes.get(source)
                     if pending is not None:
@@ -204,9 +206,11 @@ class ApplyPatchTool(_FsTool):
                     old_text = edit.get("old_text") or ""
                     if not old_text:
                         raise _PatchError(f"old_text required for replace: {path}")
+                    old_text = cast(str, old_text)
                     new_text = edit.get("new_text")
                     if new_text is None:
                         raise _PatchError(f"new_text required for replace: {path}")
+                    new_text = cast(str, new_text)
 
                     pending = writes.get(source)
                     if pending is not None:

nanobot/agent/tools/base.py

@@ -5,7 +5,7 @@ import typing
 from abc import ABC, abstractmethod
 from collections.abc import Callable
 from copy import deepcopy
-from typing import Any, TypeVar
+from typing import Any, TypeVar, cast
 
 if typing.TYPE_CHECKING:
     from pydantic import BaseModel
@@ -38,8 +38,9 @@ class Schema(ABC):
     def resolve_json_schema_type(t: Any) -> str | None:
         """Resolve the non-null type name from JSON Schema ``type`` (e.g. ``['string','null']`` -> ``'string'``)."""
         if isinstance(t, list):
-            return next((x for x in t if x != "null"), None)
-        return t  # type: ignore[return-value]
+            types = cast(list[Any], t)
+            return cast(str | None, next((x for x in types if x != "null"), None))
+        return cast(str | None, t)
 
     @staticmethod
     def subpath(path: str, key: str) -> str:
@@ -76,33 +77,41 @@ class Schema(ABC):
             if "maximum" in schema and val > schema["maximum"]:
                 errors.append(f"{label} must be <= {schema['maximum']}")
         if t == "string":
-            if "minLength" in schema and len(val) < schema["minLength"]:
+            string_value = cast(str, val)
+            if "minLength" in schema and len(string_value) < schema["minLength"]:
                 errors.append(f"{label} must be at least {schema['minLength']} chars")
-            if "maxLength" in schema and len(val) > schema["maxLength"]:
+            if "maxLength" in schema and len(string_value) > schema["maxLength"]:
                 errors.append(f"{label} must be at most {schema['maxLength']} chars")
         if t == "object":
-            props = schema.get("properties", {})
-            for k in schema.get("required", []):
-                if k not in val:
+            object_value = cast(dict[str, Any], val)
+            props = cast(dict[str, Any], schema.get("properties", {}))
+            required = cast(list[Any], schema.get("required", []))
+            for k in required:
+                if k not in object_value:
                     errors.append(f"missing required {Schema.subpath(path, k)}")
             additional = schema.get("additionalProperties", True)
-            for k, v in val.items():
+            for k, v in object_value.items():
                 if k in props:
                     errors.extend(Schema.validate_json_schema_value(v, props[k], Schema.subpath(path, k)))
                 elif additional is False:
                     errors.append(f"unexpected parameter {Schema.subpath(path, k)}")
                 elif isinstance(additional, dict):
                     errors.extend(
-                        Schema.validate_json_schema_value(v, additional, Schema.subpath(path, k))
+                        Schema.validate_json_schema_value(
+                            v,
+                            cast(dict[str, Any], additional),
+                            Schema.subpath(path, k),
+                        )
                     )
         if t == "array":
-            if "minItems" in schema and len(val) < schema["minItems"]:
+            array_value = cast(list[Any], val)
+            if "minItems" in schema and len(array_value) < schema["minItems"]:
                 errors.append(f"{label} must have at least {schema['minItems']} items")
-            if "maxItems" in schema and len(val) > schema["maxItems"]:
+            if "maxItems" in schema and len(array_value) > schema["maxItems"]:
                 errors.append(f"{label} must be at most {schema['maxItems']} items")
             if "items" in schema:
                 prefix = f"{path}[{{}}]" if path else "[{}]"
-                for i, item in enumerate(val):
+                for i, item in enumerate(array_value):
                     errors.extend(
                         Schema.validate_json_schema_value(item, schema["items"], prefix.format(i))
                     )
@@ -114,9 +123,9 @@ class Schema(ABC):
         # Try to_json_schema first: Schema instances must be distinguished from dicts that are already JSON Schema
         to_js = getattr(value, "to_json_schema", None)
         if callable(to_js):
-            return to_js()
+            return cast(dict[str, Any], to_js())
         if isinstance(value, dict):
-            return value
+            return cast(dict[str, Any], value)
         raise TypeError(f"Expected schema object or dict, got {type(value).__name__}")
 
     @abstractmethod
@@ -223,14 +232,15 @@ class Tool(ABC):
     def _cast_object(self, obj: Any, schema: dict[str, Any]) -> dict[str, Any]:
         if not isinstance(obj, dict):
             return obj
-        props = schema.get("properties", {})
+        props = cast(dict[str, Any], schema.get("properties", {}))
         additional = schema.get("additionalProperties")
         casted: dict[str, Any] = {}
-        for k, v in obj.items():
+        object_value = cast(dict[str, Any], obj)
+        for k, v in object_value.items():
             if k in props:
                 casted[k] = self._cast_value(v, props[k])
             elif isinstance(additional, dict):
-                casted[k] = self._cast_value(v, additional)
+                casted[k] = self._cast_value(v, cast(dict[str, Any], additional))
             else:
                 casted[k] = v
         return casted
@@ -273,7 +283,8 @@ class Tool(ABC):
 
         if t == "array" and isinstance(val, list):
             items = schema.get("items")
-            return [self._cast_value(x, items) for x in val] if items else val
+            array_value = cast(list[Any], val)
+            return [self._cast_value(x, items) for x in array_value] if items else array_value
 
         if t == "object" and isinstance(val, dict):
             return self._cast_object(val, schema)
@@ -282,7 +293,7 @@ class Tool(ABC):
 
     def validate_params(self, params: dict[str, Any]) -> list[str]:
         """Validate against JSON schema; empty list means valid."""
-        if not isinstance(params, dict):
+        if not isinstance(cast(object, params), dict):
             return [f"parameters must be an object, got {type(params).__name__}"]
         schema = self.parameters or {}
         if schema.get("type", "object") != "object":

nanobot/agent/tools/cli_apps.py

@@ -1,14 +1,15 @@
 """Controlled runner for installed CLI Apps."""
 
+# pyright: reportIncompatibleMethodOverride=false
+
 from __future__ import annotations
 
 from pathlib import Path
-from typing import Any
 
 from pydantic import Field
 
 from nanobot.agent.tools.base import Tool, ToolResult, tool_parameters
-from nanobot.agent.tools.context import RequestContext
+from nanobot.agent.tools.context import RequestContext, ToolContext
 from nanobot.agent.tools.schema import (
     ArraySchema,
     BooleanSchema,
@@ -66,11 +67,11 @@ class CliAppsTool(Tool):
         return CliAppsToolConfig
 
     @classmethod
-    def enabled(cls, ctx: Any) -> bool:
+    def enabled(cls, ctx: ToolContext) -> bool:
         return ctx.config.cli_apps.enable
 
     @classmethod
-    def create(cls, ctx: Any) -> Tool:
+    def create(cls, ctx: ToolContext) -> Tool:
         cfg = ctx.config.cli_apps
         return cls(
             workspace=Path(ctx.workspace),

nanobot/agent/tools/context.py

@@ -8,6 +8,16 @@ from pathlib import Path
 from typing import TYPE_CHECKING, Any, Callable, Protocol, runtime_checkable
 
 if TYPE_CHECKING:
+    from nanobot.agent.subagent import SubagentManager
+    from nanobot.agent.tools.exec_session import ExecSessionManager
+    from nanobot.agent.tools.file_state import FileStates
+    from nanobot.bus.queue import MessageBus
+    from nanobot.bus.runtime_events import RuntimeEventBus
+    from nanobot.config.schema import ProviderConfig, ToolsConfig
+    from nanobot.cron.service import CronService
+    from nanobot.providers.factory import ProviderSnapshot
+    from nanobot.security.workspace_access import WorkspaceSandboxStatus
+    from nanobot.session.manager import SessionManager
     from nanobot.utils.llm_runtime import LLMRuntime
 
 _CURRENT_REQUEST_CONTEXT: ContextVar["RequestContext | None"] = ContextVar(
@@ -67,16 +77,16 @@ def current_request_session_key() -> str | None:
 
 @dataclass
 class ToolContext:
-    config: Any
+    config: ToolsConfig
     workspace: str
-    bus: Any | None = None
-    subagent_manager: Any | None = None
-    cron_service: Any | None = None
-    exec_session_manager: Any | None = None
-    sessions: Any | None = None
-    file_state_store: Any = field(default=None)
-    provider_snapshot_loader: Callable[[], Any] | None = None
-    image_generation_provider_configs: dict[str, Any] | None = None
+    bus: MessageBus | None = None
+    subagent_manager: SubagentManager | None = None
+    cron_service: CronService | None = None
+    exec_session_manager: ExecSessionManager | None = None
+    sessions: SessionManager | None = None
+    file_state_store: FileStates | None = None
+    provider_snapshot_loader: Callable[..., ProviderSnapshot] | None = None
+    image_generation_provider_configs: dict[str, ProviderConfig] | None = None
     timezone: str = "UTC"
-    workspace_sandbox: Any | None = None
-    runtime_events: Any | None = None
+    workspace_sandbox: WorkspaceSandboxStatus | None = None
+    runtime_events: RuntimeEventBus | None = None

nanobot/agent/tools/cron.py

@@ -1,13 +1,15 @@
 """Cron tool for scheduling reminders and tasks."""
 
+# pyright: reportIncompatibleMethodOverride=false
+
 from __future__ import annotations
 
-from contextvars import ContextVar
+from contextvars import ContextVar, Token
 from datetime import datetime
 from typing import Any
 
 from nanobot.agent.tools.base import Tool, ToolResult, tool_parameters
-from nanobot.agent.tools.context import current_request_context
+from nanobot.agent.tools.context import ToolContext, current_request_context
 from nanobot.agent.tools.schema import (
     IntegerSchema,
     StringSchema,
@@ -60,12 +62,15 @@ class CronTool(Tool):
         self._in_cron_context: ContextVar[bool] = ContextVar("cron_in_context", default=False)
 
     @classmethod
-    def enabled(cls, ctx: Any) -> bool:
+    def enabled(cls, ctx: ToolContext) -> bool:
         return ctx.cron_service is not None
 
     @classmethod
-    def create(cls, ctx: Any) -> Tool:
-        return cls(cron_service=ctx.cron_service, default_timezone=ctx.timezone)
+    def create(cls, ctx: ToolContext) -> Tool:
+        cron_service = ctx.cron_service
+        if cron_service is None:
+            raise RuntimeError("CronTool requires an initialized cron service")
+        return cls(cron_service=cron_service, default_timezone=ctx.timezone)
 
     @staticmethod
     def _request_route() -> tuple[str, str, str, dict[str, Any]]:
@@ -79,11 +84,11 @@ class CronTool(Tool):
         )
         return session_key, ctx.channel or "", ctx.chat_id or "", dict(ctx.metadata or {})
 
-    def set_cron_context(self, active: bool):
+    def set_cron_context(self, active: bool) -> Token[bool]:
         """Mark whether the tool is executing inside a cron job callback."""
         return self._in_cron_context.set(active)
 
-    def reset_cron_context(self, token) -> None:
+    def reset_cron_context(self, token: Token[bool]) -> None:
         """Restore previous cron context."""
         self._in_cron_context.reset(token)
 
@@ -257,7 +262,7 @@ class CronTool(Tool):
         jobs = self._cron.list_jobs()
         if not jobs:
             return "No scheduled jobs."
-        lines = []
+        lines: list[str] = []
         for j in jobs:
             timing = self._format_timing(j.schedule)
             parts = [f"- {j.name} (id: {j.id}, {timing})"]

nanobot/agent/tools/exec_session.py

@@ -10,7 +10,7 @@ from dataclasses import dataclass
 from typing import Any
 
 from nanobot.agent.tools.base import Tool, ToolResult, tool_parameters
-from nanobot.agent.tools.context import current_request_session_key
+from nanobot.agent.tools.context import ToolContext, current_request_session_key
 from nanobot.agent.tools.schema import (
     BooleanSchema,
     IntegerSchema,
@@ -151,8 +151,8 @@ class _ExecSession:
                     timeout=2.0,
                 )
             # Safety-net reap after normal exit.
-            from nanobot.agent.tools.shell import _reap_pid
-            _reap_pid(self.process.pid)
+            from nanobot.agent.tools.shell import _reap_pid  # pyright: ignore[reportPrivateUsage]
+            _reap_pid(self.process.pid)  # pyright: ignore[reportPrivateUsage]
         elif yield_time_ms > 0:
             await self._wait_for_buffered_output()
 
@@ -177,9 +177,9 @@ class _ExecSession:
 
         try:
             if self._process_tree:
-                await ExecTool._kill_process_tree(self.process)
+                await ExecTool._kill_process_tree(self.process)  # pyright: ignore[reportPrivateUsage]
             else:
-                await ExecTool._kill_process(self.process)
+                await ExecTool._kill_process(self.process)  # pyright: ignore[reportPrivateUsage]
         finally:
             with suppress(asyncio.TimeoutError):
                 await asyncio.wait_for(
@@ -311,13 +311,13 @@ class ExecSessionManager:
         """Terminate and remove all active sessions during shutdown."""
         async with self._lock:
             self._closed = True
-            sessions = list(self._sessions.values())
+            sessions: list[_ExecSession] = list(self._sessions.values())
             self._sessions.clear()
-        results = await asyncio.gather(
+        results: list[None | BaseException] = list(await asyncio.gather(
             *(session.kill() for session in sessions),
             return_exceptions=True,
-        )
-        failures = [
+        ))
+        failures: list[tuple[_ExecSession, BaseException]] = [
             (session, result)
             for session, result in zip(sessions, results, strict=True)
             if isinstance(result, BaseException)
@@ -337,15 +337,15 @@ class ExecSessionManager:
     async def terminate_by_owner(self, owner_session_key: str) -> int:
         """Terminate all sessions owned by owner_session_key. Returns count."""
         async with self._lock:
-            victims = []
+            victims: list[_ExecSession] = []
             for sid, s in list(self._sessions.items()):
                 if s.owner_session_key == owner_session_key:
                     victims.append(self._sessions.pop(sid))
-        results = await asyncio.gather(
+        results: list[None | BaseException] = list(await asyncio.gather(
             *(s.kill() for s in victims),
             return_exceptions=True,
-        )
-        failures = [
+        ))
+        failures: list[tuple[_ExecSession, BaseException]] = [
             (session, result)
             for session, result in zip(victims, results, strict=True)
             if isinstance(result, BaseException)
@@ -384,7 +384,7 @@ class ExecSessionManager:
     ) -> asyncio.subprocess.Process:
         from nanobot.agent.tools.shell import ExecTool
 
-        return await ExecTool._spawn(
+        return await ExecTool._spawn(  # pyright: ignore[reportPrivateUsage]
             command, cwd, env, shell_program, login,
             stdin=asyncio.subprocess.PIPE,
             process_tree=True,
@@ -489,7 +489,7 @@ class WriteStdinTool(Tool):
         return ExecToolConfig
 
     @classmethod
-    def enabled(cls, ctx: Any) -> bool:
+    def enabled(cls, ctx: ToolContext) -> bool:
         return ctx.config.exec.enable
 
     def __init__(
@@ -500,8 +500,8 @@ class WriteStdinTool(Tool):
         self._manager = manager or DEFAULT_EXEC_SESSION_MANAGER
 
     @classmethod
-    def create(cls, ctx: Any) -> Tool:
-        return cls(manager=getattr(ctx, "exec_session_manager", None))
+    def create(cls, ctx: ToolContext) -> Tool:
+        return cls(manager=ctx.exec_session_manager)
 
     @property
     def exclusive(self) -> bool:
@@ -522,7 +522,7 @@ class WriteStdinTool(Tool):
             "Do not use this to start new commands; start them with exec."
         )
 
-    async def execute(
+    async def execute(  # pyright: ignore[reportIncompatibleMethodOverride]
         self,
         session_id: str,
         chars: str | None = None,
@@ -633,7 +633,7 @@ class ListExecSessionsTool(Tool):
         return ExecToolConfig
 
     @classmethod
-    def enabled(cls, ctx: Any) -> bool:
+    def enabled(cls, ctx: ToolContext) -> bool:
         return ctx.config.exec.enable
 
     def __init__(
@@ -644,8 +644,8 @@ class ListExecSessionsTool(Tool):
         self._manager = manager or DEFAULT_EXEC_SESSION_MANAGER
 
     @classmethod
-    def create(cls, ctx: Any) -> Tool:
-        return cls(manager=getattr(ctx, "exec_session_manager", None))
+    def create(cls, ctx: ToolContext) -> Tool:
+        return cls(manager=ctx.exec_session_manager)
 
     @property
     def name(self) -> str:
@@ -671,7 +671,7 @@ class ListExecSessionsTool(Tool):
             )
             if not sessions:
                 return "No active exec sessions."
-            lines = []
+            lines: list[str] = []
             for info in sessions:
                 command = " ".join(info.command.split())
                 if len(command) > 120:

nanobot/agent/tools/file_state.py

@@ -125,6 +125,10 @@ class FileStates:
         """Return the raw ReadState entry for a path, or None."""
         return self._state.get(str(Path(path).resolve()))
 
+    def raw_state(self) -> dict[str, ReadState]:
+        """Return the mutable backing map for legacy compatibility."""
+        return self._state
+
     def clear(self) -> None:
         """Clear all tracked state (useful for testing)."""
         self._state.clear()
@@ -201,5 +205,5 @@ def clear() -> None:
 # so existing imports keep working.
 def __getattr__(name: str):
     if name == "_state":
-        return _default._state
+        return _default.raw_state()
     raise AttributeError(name)

nanobot/agent/tools/filesystem.py

@@ -1,5 +1,7 @@
 """File system tools: read, write, edit, list."""
 
+# pyright: reportPrivateUsage=false, reportUnusedFunction=false
+
 import difflib
 import mimetypes
 import os
@@ -8,6 +10,7 @@ from pathlib import Path
 from typing import Any
 
 from nanobot.agent.tools.base import Tool, ToolResult, tool_parameters
+from nanobot.agent.tools.context import ToolContext
 from nanobot.agent.tools.file_state import FileStates, _hash_file, current_file_states
 from nanobot.agent.tools.path_utils import resolve_workspace_path
 from nanobot.agent.tools.schema import (
@@ -37,7 +40,7 @@ class _FsTool(Tool):
         return FileToolsConfig
 
     @classmethod
-    def enabled(cls, ctx: Any) -> bool:
+    def enabled(cls, ctx: ToolContext) -> bool:
         return ctx.config.file.enable
 
     def __init__(
@@ -77,7 +80,7 @@ class _FsTool(Tool):
         self._fallback_file_states = FileStates()
 
     @classmethod
-    def create(cls, ctx: Any) -> Tool:
+    def create(cls, ctx: ToolContext) -> Tool:
         from nanobot.agent.skills import BUILTIN_SKILLS_DIR
 
         agent_workspace = Path(ctx.workspace)
@@ -408,7 +411,8 @@ class ReadFileTool(_FsTool):
             result = "\n".join(numbered)
 
             if len(result) > self._MAX_CHARS:
-                trimmed, chars = [], 0
+                trimmed: list[str] = []
+                chars = 0
                 for line in numbered:
                     chars += len(line) + 1
                     if chars > self._MAX_CHARS:

nanobot/agent/tools/image_generation.py

@@ -4,7 +4,7 @@ from __future__ import annotations
 
 import asyncio
 from pathlib import Path
-from typing import TYPE_CHECKING, Any
+from typing import TYPE_CHECKING, Any, cast
 
 from loguru import logger
 from pydantic import Field
@@ -23,6 +23,7 @@ from nanobot.bus.events import (
     RUNTIME_CONTROL_IMAGE_GENERATION_RELOAD,
     InboundMessage,
 )
+from nanobot.bus.queue import MessageBus
 from nanobot.config.paths import get_media_dir
 from nanobot.config_base import Base
 from nanobot.providers.image_generation import (
@@ -41,6 +42,7 @@ from nanobot.utils.artifacts import (
 from nanobot.utils.helpers import detect_image_mime
 
 if TYPE_CHECKING:
+    from nanobot.agent.tools.context import ToolContext
     from nanobot.config.schema import ProviderConfig
 
 
@@ -89,11 +91,11 @@ class ImageGenerationTool(Tool):
         return ImageGenerationToolConfig
 
     @classmethod
-    def enabled(cls, ctx: Any) -> bool:
+    def enabled(cls, ctx: ToolContext) -> bool:
         return ctx.config.image_generation.enabled
 
     @classmethod
-    def create(cls, ctx: Any) -> Tool:
+    def create(cls, ctx: ToolContext) -> Tool:
         return cls(
             workspace=ctx.workspace,
             config=ctx.config.image_generation,
@@ -134,12 +136,14 @@ class ImageGenerationTool(Tool):
         cls = get_image_gen_provider(self.config.provider)
         if cls is None:
             return None
-        kwargs = {
-            "api_key": provider.api_key if provider else None,
-            "api_base": provider.api_base if provider else None,
-            "extra_headers": provider.extra_headers if provider else None,
-            "extra_body": provider.extra_body if provider else None,
-            "proxy": provider.proxy if provider else None,
+        kwargs: dict[str, Any] = {
+            "api_key": provider.api_key if provider and isinstance(provider.api_key, str) else None,
+            "api_base": provider.api_base if provider and isinstance(provider.api_base, str) else None,
+            "extra_headers": provider.extra_headers
+            if provider and isinstance(provider.extra_headers, dict) else None,
+            "extra_body": provider.extra_body
+            if provider and isinstance(provider.extra_body, dict) else None,
+            "proxy": provider.proxy if provider and isinstance(provider.proxy, str) else None,
         }
         return cls(**kwargs)
 
@@ -172,7 +176,7 @@ class ImageGenerationTool(Tool):
             return []
         return [self._resolve_reference_image(value) for value in values if value]
 
-    async def execute(
+    async def execute(  # pyright: ignore[reportIncompatibleMethodOverride]
         self,
         prompt: str,
         reference_images: list[str] | None = None,
@@ -238,7 +242,7 @@ async def reload_image_generation_tool(state: Any, registry: ToolRegistry) -> di
         }
 
     next_tool = (
-        ImageGenerationTool(
+        ImageGenerationTool(  # pyright: ignore[reportAbstractUsage]
             workspace=state.workspace,
             config=tool_config,
             provider_configs=provider_configs,
@@ -271,7 +275,7 @@ async def reload_image_generation_tool(state: Any, registry: ToolRegistry) -> di
 
 
 async def request_image_generation_reload(
-    bus: Any,
+    bus: MessageBus,
     *,
     timeout: float = 5.0,
 ) -> dict[str, Any]:
@@ -298,11 +302,13 @@ async def request_image_generation_reload(
             "message": "Image generation hot reload timed out.",
             "requires_restart": True,
         }
-    return result if isinstance(result, dict) else {
-        "ok": False,
-        "message": "Image generation hot reload returned an unexpected response.",
-        "requires_restart": True,
-    }
+    if not isinstance(cast(object, result), dict):
+        return {
+            "ok": False,
+            "message": "Image generation hot reload returned an unexpected response.",
+            "requires_restart": True,
+        }
+    return result
 
 
 async def handle_runtime_control(
@@ -311,7 +317,7 @@ async def handle_runtime_control(
     registry: ToolRegistry,
 ) -> bool:
     """Handle an in-process image generation reload request."""
-    metadata = msg.metadata if isinstance(msg.metadata, dict) else {}
+    metadata = msg.metadata
     if metadata.get(INBOUND_META_RUNTIME_CONTROL) != RUNTIME_CONTROL_IMAGE_GENERATION_RELOAD:
         return False
 
@@ -327,5 +333,5 @@ async def handle_runtime_control(
             "error": str(exc),
         }
     if isinstance(ack, asyncio.Future) and not ack.done():
-        ack.set_result(result)
+        cast(asyncio.Future[Any], ack).set_result(result)
     return True

nanobot/agent/tools/loader.py

@@ -1,16 +1,22 @@
 """Tool discovery and registration via package scanning."""
+
+# pyright: reportIncompatibleVariableOverride=false
+
 from __future__ import annotations
 
 import importlib
 import pkgutil
 from importlib.metadata import entry_points
-from typing import Any
+from typing import TYPE_CHECKING, Any
 
 from loguru import logger
 
 from nanobot.agent.tools.base import Tool, ToolResult
 from nanobot.agent.tools.registry import ToolRegistry
 
+if TYPE_CHECKING:
+    from nanobot.agent.tools.context import RequestContext, ToolContext
+
 _SKIP_MODULES = frozenset({
     "base", "schema", "registry", "context", "loader", "config",
     "file_state", "sandbox", "mcp", "__init__", "runtime_state",
@@ -83,7 +89,7 @@ class ToolLoader:
         self._plugins = plugins
         return plugins
 
-    def load(self, ctx: Any, registry: ToolRegistry, *, scope: str = "core") -> list[str]:
+    def load(self, ctx: ToolContext, registry: ToolRegistry, *, scope: str = "core") -> list[str]:
         registered: list[str] = []
         builtin_names: set[str] = set()
         sources = [(self.discover(), False), (self._discover_plugins().values(), True)]
@@ -157,7 +163,7 @@ class _LegacyErrorPrefixTool(Tool):
     def config_key(self) -> str:
         return getattr(self._wrapped, "config_key", "")
 
-    def set_context(self, ctx: Any) -> None:
+    def set_context(self, ctx: RequestContext) -> None:
         set_context = getattr(self._wrapped, "set_context", None)
         if callable(set_context):
             set_context(ctx)

nanobot/agent/tools/long_task.py

@@ -1,5 +1,7 @@
 """Sustained-goal tools with explicit user opt-in at the execution boundary."""
 
+# pyright: reportIncompatibleMethodOverride=false
+
 from __future__ import annotations
 
 from copy import deepcopy
@@ -11,7 +13,7 @@ from nanobot.agent.goal_permission import (
     revoke_goal_mutation_permission,
 )
 from nanobot.agent.tools.base import Tool, ToolResult, tool_parameters
-from nanobot.agent.tools.context import RequestContext, current_request_context
+from nanobot.agent.tools.context import RequestContext, ToolContext, current_request_context
 from nanobot.agent.tools.schema import StringSchema, tool_parameters_schema
 from nanobot.bus.runtime_events import GoalStateChanged, RuntimeEventBus, RuntimeEventContext
 from nanobot.runtime_context import RuntimeContextBlock, wrap_runtime_context_lines
@@ -132,23 +134,24 @@ class CreateGoalTool(Tool, _GoalToolsMixin):
 
     def __init__(
         self,
-        sessions: Any,
+        sessions: SessionManager,
         runtime_events: RuntimeEventBus | None = None,
     ) -> None:
         _GoalToolsMixin.__init__(self, sessions, runtime_events)
 
     @classmethod
-    def create(cls, ctx: Any) -> Tool:
-        sess = getattr(ctx, "sessions", None)
-        assert sess is not None
+    def create(cls, ctx: ToolContext) -> Tool:
+        sess = ctx.sessions
+        if sess is None:
+            raise RuntimeError("CreateGoalTool requires an initialized session manager")
         return cls(
             sessions=sess,
-            runtime_events=getattr(ctx, "runtime_events", None),
+            runtime_events=ctx.runtime_events,
         )
 
     @classmethod
-    def enabled(cls, ctx: Any) -> bool:
-        return getattr(ctx, "sessions", None) is not None
+    def enabled(cls, ctx: ToolContext) -> bool:
+        return ctx.sessions is not None
 
     @property
     def name(self) -> str:
@@ -262,23 +265,24 @@ class UpdateGoalTool(Tool, _GoalToolsMixin):
 
     def __init__(
         self,
-        sessions: Any,
+        sessions: SessionManager,
         runtime_events: RuntimeEventBus | None = None,
     ) -> None:
         _GoalToolsMixin.__init__(self, sessions, runtime_events)
 
     @classmethod
-    def create(cls, ctx: Any) -> Tool:
-        sess = getattr(ctx, "sessions", None)
-        assert sess is not None
+    def create(cls, ctx: ToolContext) -> Tool:
+        sess = ctx.sessions
+        if sess is None:
+            raise RuntimeError("UpdateGoalTool requires an initialized session manager")
         return cls(
             sessions=sess,
-            runtime_events=getattr(ctx, "runtime_events", None),
+            runtime_events=ctx.runtime_events,
         )
 
     @classmethod
-    def enabled(cls, ctx: Any) -> bool:
-        return getattr(ctx, "sessions", None) is not None
+    def enabled(cls, ctx: ToolContext) -> bool:
+        return ctx.sessions is not None
 
     @property
     def name(self) -> str:

nanobot/agent/tools/mcp.py

@@ -7,9 +7,9 @@ import os
 import re
 import shutil
 import urllib.parse
-from collections.abc import Awaitable, Callable
+from collections.abc import AsyncIterator, Awaitable, Callable
 from contextlib import AsyncExitStack, suppress
-from typing import Any, Mapping, Protocol
+from typing import TYPE_CHECKING, Any, Mapping, Protocol, cast
 from weakref import WeakKeyDictionary
 
 import httpx
@@ -23,6 +23,7 @@ from nanobot.bus.events import (
     RUNTIME_CONTROL_MCP_RELOAD,
     InboundMessage,
 )
+from nanobot.bus.queue import MessageBus
 from nanobot.security.network import (
     PinnedDNSAsyncTransport,
     env_proxy_applies_to_url,
@@ -32,6 +33,13 @@ from nanobot.security.network import (
 )
 from nanobot.utils.cancellation import task_is_cancelling
 
+if TYPE_CHECKING:
+    from mcp import ClientSession
+    from mcp.types import Prompt, Resource
+    from mcp.types import Tool as MCPToolDefinition
+
+    from nanobot.config.schema import MCPServerConfig
+
 # Transient connection errors that warrant a single retry.
 # These typically happen when an MCP server restarts or a network
 # connection is interrupted between calls.
@@ -92,7 +100,7 @@ def _mcp_jsonrpc_payload(message: Any) -> Any:
 
 def _payload_value(payload: Any, key: str) -> Any:
     if isinstance(payload, Mapping):
-        return payload.get(key)
+        return cast(Mapping[str, Any], payload).get(key)
     return getattr(payload, key, None)
 
 
@@ -106,7 +114,7 @@ class _MalformedProgressNotificationFilter:
     def __init__(self, read_stream: Any, server_name: str) -> None:
         self._read_stream = read_stream
         self._server_name = server_name
-        self._iterator: Any | None = None
+        self._iterator: AsyncIterator[Any] | None = None
 
     async def __aenter__(self) -> "_MalformedProgressNotificationFilter":
         await self._read_stream.__aenter__()
@@ -120,11 +128,13 @@ class _MalformedProgressNotificationFilter:
         return self
 
     async def __anext__(self) -> Any:
-        if self._iterator is None:
-            self._iterator = self._read_stream.__aiter__()
+        iterator = self._iterator
+        if iterator is None:
+            iterator = self._read_stream.__aiter__()
+            self._iterator = iterator
 
         while True:
-            message = await self._iterator.__anext__()
+            message = await anext(iterator)
             if _is_malformed_mcp_progress_notification(message):
                 logger.debug(
                     "MCP server '{}': dropped progress notification without progressToken",
@@ -241,8 +251,8 @@ def _redact_url(url: str) -> str:
         return "<redacted-url>"
 
 
-def _pinned_transport_kwargs() -> dict[str, object]:
-    kwargs: dict[str, object] = {"transport": PinnedDNSAsyncTransport()}
+def _pinned_transport_kwargs() -> dict[str, Any]:
+    kwargs: dict[str, Any] = {"transport": PinnedDNSAsyncTransport()}
     mounts = httpx_env_proxy_mounts()
     if mounts:
         kwargs["mounts"] = mounts
@@ -302,13 +312,14 @@ def _extract_nullable_branch(options: Any) -> tuple[dict[str, Any], bool] | None
 
     non_null: list[dict[str, Any]] = []
     saw_null = False
-    for option in options:
+    for option in cast(list[object], options):
         if not isinstance(option, dict):
             return None
-        if option.get("type") == "null":
+        option_schema = cast(dict[str, Any], option)
+        if option_schema.get("type") == "null":
             saw_null = True
             continue
-        non_null.append(option)
+        non_null.append(option_schema)
 
     if saw_null and len(non_null) == 1:
         return non_null[0], True
@@ -330,9 +341,9 @@ def _resolve_local_schema_ref(root: dict[str, Any], ref: str) -> Any:
     for raw_part in pointer[1:].split("/"):
         part = raw_part.replace("~1", "/").replace("~0", "~")
         if isinstance(current, dict):
-            current = current[part]
+            current = cast(dict[str, Any], current)[part]
         elif isinstance(current, list):
-            current = current[int(part)]
+            current = cast(list[Any], current)[int(part)]
         else:
             raise KeyError(part)
     return current
@@ -345,14 +356,15 @@ def _rewrite_local_schema_refs(schema: dict[str, Any]) -> dict[str, Any]:
 
     def rewrite(value: Any) -> Any:
         if isinstance(value, list):
-            return [rewrite(item) for item in value]
+            return [rewrite(item) for item in cast(list[Any], value)]
         if not isinstance(value, dict):
             return value
 
-        rewritten = dict(value)
-        ref = rewritten.get("$ref")
+        rewritten = dict(cast(dict[str, Any], value))
+        raw_ref = rewritten.get("$ref")
+        ref = raw_ref if isinstance(raw_ref, str) else None
         is_rewritable_ref = False
-        if isinstance(ref, str) and not ref.startswith("#/$defs/"):
+        if ref is not None and not ref.startswith("#/$defs/"):
             try:
                 pointer = urllib.parse.unquote(ref[1:], errors="strict")
             except (UnicodeDecodeError, ValueError):
@@ -362,6 +374,7 @@ def _rewrite_local_schema_refs(schema: dict[str, Any]) -> dict[str, Any]:
                     not pointer or pointer.startswith("/")
                 )
         if is_rewritable_ref:
+            assert ref is not None
             name = rewritten_refs.get(ref)
             if name is None:
                 try:
@@ -369,7 +382,6 @@ def _rewrite_local_schema_refs(schema: dict[str, Any]) -> dict[str, Any]:
                 except (KeyError, IndexError, TypeError, UnicodeDecodeError, ValueError):
                     logger.warning("MCP tool schema contains an unresolved local $ref: {}", ref)
                 else:
-                    assert isinstance(ref, str)
                     name = f"ref_{hashlib.sha256(ref.encode()).hexdigest()[:12]}"
                     existing_defs = schema.get("$defs")
                     while isinstance(existing_defs, dict) and name in existing_defs:
@@ -383,7 +395,7 @@ def _rewrite_local_schema_refs(schema: dict[str, Any]) -> dict[str, Any]:
 
         return {key: rewrite(item) for key, item in rewritten.items()}
 
-    result = rewrite(schema)
+    result = cast(dict[str, Any], rewrite(schema))
     if generated_defs:
         existing_defs = result.get("$defs")
         result["$defs"] = {
@@ -398,8 +410,9 @@ def _normalize_nullable_schema(schema: dict[str, Any]) -> dict[str, Any]:
     normalized = dict(schema)
     raw_type = normalized.get("type")
     if isinstance(raw_type, list):
-        non_null = [item for item in raw_type if item != "null"]
-        if "null" in raw_type and len(non_null) == 1:
+        type_values = cast(list[Any], raw_type)
+        non_null = [item for item in type_values if item != "null"]
+        if "null" in type_values and len(non_null) == 1:
             normalized["type"] = non_null[0]
             normalized["nullable"] = True
 
@@ -413,19 +426,28 @@ def _normalize_nullable_schema(schema: dict[str, Any]) -> dict[str, Any]:
             normalized["nullable"] = True
             break
 
-    if isinstance(normalized.get("properties"), dict):
+    properties = normalized.get("properties")
+    if isinstance(properties, dict):
+        property_schemas = cast(dict[str, Any], properties)
         normalized["properties"] = {
-            name: _normalize_nullable_schema(prop) if isinstance(prop, dict) else prop
-            for name, prop in normalized["properties"].items()
+            name: (
+                _normalize_nullable_schema(cast(dict[str, Any], prop))
+                if isinstance(prop, dict)
+                else prop
+            )
+            for name, prop in property_schemas.items()
         }
-    if isinstance(normalized.get("items"), dict):
-        normalized["items"] = _normalize_nullable_schema(normalized["items"])
-    if isinstance(normalized.get("$defs"), dict):
+    items = normalized.get("items")
+    if isinstance(items, dict):
+        normalized["items"] = _normalize_nullable_schema(cast(dict[str, Any], items))
+    definitions = normalized.get("$defs")
+    if isinstance(definitions, dict):
+        definition_schemas = cast(dict[str, Any], definitions)
         normalized["$defs"] = {
-            name: _normalize_nullable_schema(definition)
+            name: _normalize_nullable_schema(cast(dict[str, Any], definition))
             if isinstance(definition, dict)
             else definition
-            for name, definition in normalized["$defs"].items()
+            for name, definition in definition_schemas.items()
         }
 
     if normalized.get("type") == "object":
@@ -438,15 +460,19 @@ def _normalize_schema_for_openai(schema: Any) -> dict[str, Any]:
     """Normalize MCP JSON Schema patterns for tool definitions."""
     if not isinstance(schema, dict):
         return {"type": "object", "properties": {}}
-    return _normalize_nullable_schema(_rewrite_local_schema_refs(schema))
+    schema_mapping = cast(dict[str, Any], schema)
+    return _normalize_nullable_schema(_rewrite_local_schema_refs(schema_mapping))
 
 
 class _MCPWrapperBase(Tool):
     """Common reconnect handling for wrappers bound to one MCP server session."""
 
     _plugin_discoverable = False
+    _session: "ClientSession"
+    _server_name: str
+    _name: str
 
-    def _set_mcp_connection(self, session: Any, server_name: str) -> None:
+    def _set_mcp_connection(self, session: "ClientSession", server_name: str) -> None:
         self._session = session
         self._server_name = server_name
         self._reconnect: _ReconnectCallback | None = None
@@ -500,9 +526,10 @@ def _image_block_data_url(block: Any, types: Any) -> str | None:
     if embedded_cls is not None and isinstance(block, embedded_cls):
         resource = getattr(block, "resource", None)
         if blob_cls is not None and isinstance(resource, blob_cls):
-            mime = getattr(resource, "mimeType", None) or ""
+            blob_resource = cast(Any, resource)
+            mime = getattr(blob_resource, "mimeType", None) or ""
             if isinstance(mime, str) and mime.startswith("image/"):
-                return f"data:{mime};base64,{resource.blob}"
+                return f"data:{mime};base64,{blob_resource.blob}"
     return None
 
 
@@ -533,7 +560,13 @@ class MCPToolWrapper(_MCPWrapperBase):
 
     _plugin_discoverable = False
 
-    def __init__(self, session, server_name: str, tool_def, tool_timeout: int = 30):
+    def __init__(
+        self,
+        session: "ClientSession",
+        server_name: str,
+        tool_def: "MCPToolDefinition",
+        tool_timeout: int = 30,
+    ):
         self._set_mcp_connection(session, server_name)
         self._original_name = tool_def.name
         self._name = _sanitize_mcp_tool_name(f"mcp_{server_name}_{tool_def.name}")
@@ -689,7 +722,13 @@ class MCPResourceWrapper(_MCPWrapperBase):
 
     _plugin_discoverable = False
 
-    def __init__(self, session, server_name: str, resource_def, resource_timeout: int = 30):
+    def __init__(
+        self,
+        session: "ClientSession",
+        server_name: str,
+        resource_def: "Resource",
+        resource_timeout: int = 30,
+    ):
         self._set_mcp_connection(session, server_name)
         self._uri = resource_def.uri
         self._name = _sanitize_mcp_tool_name(f"mcp_{server_name}_resource_{resource_def.name}")
@@ -775,7 +814,7 @@ class MCPResourceWrapper(_MCPWrapperBase):
                 for block in result.contents:
                     if isinstance(block, types.TextResourceContents):
                         parts.append(block.text)
-                    elif isinstance(block, types.BlobResourceContents):
+                    elif isinstance(cast(object, block), types.BlobResourceContents):
                         parts.append(f"[Binary resource: {len(block.blob)} bytes]")
                     else:
                         parts.append(str(block))
@@ -787,7 +826,13 @@ class MCPPromptWrapper(_MCPWrapperBase):
 
     _plugin_discoverable = False
 
-    def __init__(self, session, server_name: str, prompt_def, prompt_timeout: int = 30):
+    def __init__(
+        self,
+        session: "ClientSession",
+        server_name: str,
+        prompt_def: "Prompt",
+        prompt_timeout: int = 30,
+    ):
         self._set_mcp_connection(session, server_name)
         self._prompt_name = prompt_def.name
         self._name = _sanitize_mcp_tool_name(f"mcp_{server_name}_prompt_{prompt_def.name}")
@@ -916,7 +961,7 @@ class MCPPromptWrapper(_MCPWrapperBase):
 
 
 async def connect_mcp_servers(
-    mcp_servers: dict, registry: ToolRegistry
+    mcp_servers: "dict[str, MCPServerConfig]", registry: ToolRegistry
 ) -> dict[str, MCPConnection]:
     """Connect to configured MCP servers and register their tools, resources, prompts.
 
@@ -929,7 +974,9 @@ async def connect_mcp_servers(
     from mcp.client.stdio import stdio_client
     from mcp.client.streamable_http import streamable_http_client
 
-    async def open_single_server(name: str, cfg) -> tuple[str, AsyncExitStack | None]:
+    async def open_single_server(
+        name: str, cfg: "MCPServerConfig"
+    ) -> tuple[str, AsyncExitStack | None]:
         server_stack = AsyncExitStack()
         await server_stack.__aenter__()
 
@@ -1148,7 +1195,9 @@ async def connect_mcp_servers(
                 await server_stack.aclose()
             return name, None
 
-    async def connect_single_server(name: str, cfg) -> tuple[str, MCPConnection | None]:
+    async def connect_single_server(
+        name: str, cfg: "MCPServerConfig"
+    ) -> tuple[str, MCPConnection | None]:
         loop = asyncio.get_running_loop()
         ready: asyncio.Future[bool] = loop.create_future()
         close_requested = asyncio.Event()
@@ -1192,7 +1241,7 @@ async def connect_mcp_servers(
         except Exception as e:
             logger.exception("MCP server '{}' connection failed: {}", name, e)
             continue
-        if result is not None and result[1] is not None:
+        if result[1] is not None:
             server_stacks[result[0]] = result[1]
 
     return server_stacks
@@ -1335,7 +1384,11 @@ async def reload_servers(state: Any, registry: ToolRegistry) -> dict[str, Any]:
         }
 
 
-async def request_mcp_reload(bus: Any, *, timeout: float = 15.0) -> dict[str, Any]:
+async def request_mcp_reload(
+    bus: MessageBus,
+    *,
+    timeout: float = 15.0,
+) -> dict[str, Any]:
     """Ask the running agent loop to reconcile live MCP connections."""
     loop = asyncio.get_running_loop()
     ack: asyncio.Future[dict[str, Any]] = loop.create_future()
@@ -1359,7 +1412,7 @@ async def request_mcp_reload(bus: Any, *, timeout: float = 15.0) -> dict[str, An
             "message": "MCP hot reload timed out. Restart nanobot to pick up changes.",
             "requires_restart": True,
         }
-    return result if isinstance(result, dict) else {
+    return result if isinstance(cast(object, result), dict) else {
         "ok": False,
         "message": "MCP hot reload returned an unexpected response.",
         "requires_restart": True,
@@ -1367,7 +1420,7 @@ async def request_mcp_reload(bus: Any, *, timeout: float = 15.0) -> dict[str, An
 
 
 async def handle_runtime_control(state: Any, msg: InboundMessage, registry: ToolRegistry) -> bool:
-    metadata = msg.metadata if isinstance(msg.metadata, dict) else {}
+    metadata = msg.metadata if isinstance(cast(object, msg.metadata), dict) else {}
     control = metadata.get(INBOUND_META_RUNTIME_CONTROL)
     if control != RUNTIME_CONTROL_MCP_RELOAD:
         return False
@@ -1384,7 +1437,7 @@ async def handle_runtime_control(state: Any, msg: InboundMessage, registry: Tool
             "error": str(exc),
         }
     if isinstance(ack, asyncio.Future) and not ack.done():
-        ack.set_result(result)
+        cast(asyncio.Future[dict[str, Any]], ack).set_result(result)
     return True
 
 

nanobot/agent/tools/message.py

@@ -1,13 +1,15 @@
 """Message tool for sending messages to users."""
 
-from contextvars import ContextVar
+# pyright: reportIncompatibleMethodOverride=false
+
+from contextvars import ContextVar, Token
 from pathlib import Path
-from typing import Any, Awaitable, Callable
+from typing import Any, Awaitable, Callable, cast
 
 from loguru import logger
 
 from nanobot.agent.tools.base import Tool, ToolResult, tool_parameters
-from nanobot.agent.tools.context import current_request_context
+from nanobot.agent.tools.context import ToolContext, current_request_context
 from nanobot.agent.tools.path_utils import resolve_workspace_path
 from nanobot.agent.tools.schema import ArraySchema, StringSchema, tool_parameters_schema
 from nanobot.bus.events import OutboundMessage
@@ -73,7 +75,7 @@ class MessageTool(Tool):
         )
 
     @classmethod
-    def create(cls, ctx: Any) -> Tool:
+    def create(cls, ctx: ToolContext) -> Tool:
         send_callback = ctx.bus.publish_outbound if ctx.bus else None
         return cls(
             send_callback=send_callback,
@@ -89,11 +91,11 @@ class MessageTool(Tool):
         """Reset per-turn send tracking."""
         self._sent_in_turn = False
 
-    def set_suppress_delivery(self, active: bool):
+    def set_suppress_delivery(self, active: bool) -> Token[bool]:
         """Acknowledge but don't deliver tool sends (heartbeat internal check)."""
         return self._suppress_delivery_var.set(active)
 
-    def reset_suppress_delivery(self, token) -> None:
+    def reset_suppress_delivery(self, token: Token[bool]) -> None:
         """Restore previous delivery-suppression state."""
         self._suppress_delivery_var.reset(token)
 
@@ -148,19 +150,23 @@ class MessageTool(Tool):
         chat_id: str | None = None,
         message_id: str | None = None,
         media: list[str] | None = None,
-        buttons: list[list[str]] | None = None,
+        buttons: Any = None,
         **kwargs: Any,
-    ) -> str:
+    ) -> str:  # pyright: ignore[reportIncompatibleMethodOverride]
         from nanobot.utils.helpers import strip_think
 
         content = strip_think(content)
 
+        button_rows: list[list[str]] | None = None
         if buttons is not None:
-            if not isinstance(buttons, list) or any(
-                not isinstance(row, list) or any(not isinstance(label, str) for label in row)
-                for row in buttons
+            raw_buttons = cast(list[Any], buttons) if isinstance(buttons, list) else None
+            if raw_buttons is None or any(
+                not isinstance(row, list)
+                or any(not isinstance(label, str) for label in cast(list[Any], row))
+                for row in raw_buttons
             ):
                 return ToolResult.error("Error: buttons must be a list of list of strings")
+            button_rows = cast(list[list[str]], raw_buttons)
         request_ctx = current_request_context()
         default_channel = (
             request_ctx.channel if request_ctx is not None else self._fallback_channel
@@ -228,7 +234,7 @@ class MessageTool(Tool):
             chat_id=chat_id,
             content=content,
             media=media or [],
-            buttons=buttons or [],
+            buttons=button_rows or [],
             metadata=metadata,
         )
 
@@ -241,7 +247,11 @@ class MessageTool(Tool):
             if channel == default_channel and chat_id == default_chat_id:
                 self._sent_in_turn = True
             media_info = f" with {len(media)} attachments" if media else ""
-            button_info = f" with {sum(len(row) for row in buttons)} button(s)" if buttons else ""
+            button_info = (
+                f" with {sum(len(row) for row in button_rows)} button(s)"
+                if button_rows
+                else ""
+            )
             return f"Message sent to {channel}:{chat_id}{media_info}{button_info}"
         except Exception as e:
             return ToolResult.error(f"Error sending message: {str(e)}")

nanobot/agent/tools/registry.py

@@ -3,7 +3,7 @@
 from __future__ import annotations
 
 import json
-from typing import TYPE_CHECKING, Any
+from typing import TYPE_CHECKING, Any, cast
 
 from nanobot.agent.tools.base import Tool, ToolResult
 from nanobot.agent.tools.context import ContextAware, current_request_context
@@ -77,7 +77,7 @@ class ToolRegistry:
         """Extract a normalized tool name from either OpenAI or flat schemas."""
         fn = schema.get("function")
         if isinstance(fn, dict):
-            name = fn.get("name")
+            name = cast(dict[str, Any], fn).get("name")
             if isinstance(name, str):
                 return name
         name = schema.get("name")
@@ -140,7 +140,7 @@ class ToolRegistry:
                 )
             )
 
-        cast_params = tool.cast_params(params)
+        cast_params = tool.cast_params(cast(dict[str, Any], params))
         errors = tool.validate_params(cast_params)
         if errors:
             return tool, cast_params, (
@@ -176,12 +176,15 @@ class ToolRegistry:
 
     @classmethod
     def _unwrap_arguments_payload(cls, tool: Tool, params: Any) -> Any:
-        if not isinstance(params, dict) or set(params) != {"arguments"}:
+        if not isinstance(params, dict):
             return params
+        arguments_payload = cast(dict[str, Any], params)
+        if set(arguments_payload) != {"arguments"}:
+            return arguments_payload
         properties = (tool.parameters or {}).get("properties", {})
         if isinstance(properties, dict) and "arguments" in properties:
-            return params
-        return cls._coerce_argument_value(params.get("arguments"))
+            return arguments_payload
+        return cls._coerce_argument_value(arguments_payload.get("arguments"))
 
     async def execute(self, name: str, params: Any) -> Any:
         """Execute a tool by name with given parameters."""

nanobot/agent/tools/runtime_state.py

@@ -1,6 +1,15 @@
 """RuntimeState protocol: agent loop state exposed to MyTool."""
 
-from typing import Any, Protocol
+from __future__ import annotations
+
+from pathlib import Path
+from typing import TYPE_CHECKING, Any, Protocol
+
+if TYPE_CHECKING:
+    from nanobot.agent.subagent import SubagentManager
+    from nanobot.agent.tools.shell import ExecToolConfig
+    from nanobot.agent.tools.web import WebToolsConfig
+    from nanobot.utils.llm_runtime import LLMRuntime
 
 
 class RuntimeState(Protocol):
@@ -25,7 +34,7 @@ class RuntimeState(Protocol):
     def tool_names(self) -> list[str]: ...
 
     @property
-    def workspace(self) -> str: ...
+    def workspace(self) -> Path: ...
 
     @property
     def provider_retry_mode(self) -> str: ...
@@ -37,34 +46,31 @@ class RuntimeState(Protocol):
     def context_window_tokens(self) -> int: ...
 
     @property
-    def web_config(self) -> Any: ...
+    def web_config(self) -> WebToolsConfig: ...
 
     @property
-    def exec_config(self) -> Any: ...
+    def exec_config(self) -> ExecToolConfig: ...
 
     @property
-    def workspace_sandbox(self) -> Any: ...
-
-    @property
-    def subagents(self) -> Any: ...
+    def subagents(self) -> SubagentManager: ...
 
     @property
     def _runtime_vars(self) -> dict[str, Any]: ...
 
     @property
-    def _last_usage(self) -> Any: ...
+    def _last_usage(self) -> dict[str, int]: ...
 
     def _sync_subagent_runtime_limits(self) -> None: ...
 
-    def set_runtime_model(self, model: str) -> Any: ...
+    def set_runtime_model(self, model: str) -> LLMRuntime: ...
 
-    def set_runtime_context_window(self, context_window_tokens: int) -> Any: ...
+    def set_runtime_context_window(self, context_window_tokens: int) -> LLMRuntime: ...
 
     def set_session_model_preset(
         self,
         session_key: str,
         name: str,
-    ) -> Any: ...
+    ) -> LLMRuntime: ...
 
     @property
     def model_preset(self) -> str | None: ...

nanobot/agent/tools/search.py

@@ -1,5 +1,7 @@
 """Search tools: file discovery and grep."""
 
+# pyright: reportIncompatibleMethodOverride=false, reportPrivateUsage=false
+
 from __future__ import annotations
 
 import fnmatch

nanobot/agent/tools/self.py

@@ -1,10 +1,14 @@
 """MyTool: runtime state inspection and configuration for the agent loop."""
 
+# RuntimeState intentionally exposes a narrow set of AgentLoop internals to
+# this manually registered tool. Tool.execute accepts heterogeneous schemas.
+# pyright: reportPrivateUsage=false, reportIncompatibleMethodOverride=false
+
 from __future__ import annotations
 
 import time
 from collections.abc import Mapping
-from typing import TYPE_CHECKING, Any
+from typing import TYPE_CHECKING, Any, TypeGuard, cast
 
 from loguru import logger
 
@@ -15,6 +19,7 @@ from nanobot.config_base import Base
 
 if TYPE_CHECKING:
     from nanobot.agent.subagent import SubagentStatus
+    from nanobot.agent.tools.context import ToolContext
 
 
 class MyToolConfig(Base):
@@ -36,7 +41,7 @@ def _has_real_attr(obj: Any, key: str) -> bool:
     return False
 
 
-def _is_subagent_status(value: Any) -> bool:
+def _is_subagent_status(value: object) -> TypeGuard[SubagentStatus]:
     from nanobot.agent.subagent import SubagentStatus
 
     return isinstance(value, SubagentStatus)
@@ -53,7 +58,7 @@ class MyTool(Tool):
         return MyToolConfig
 
     @classmethod
-    def enabled(cls, ctx: Any) -> bool:
+    def enabled(cls, ctx: ToolContext) -> bool:
         return ctx.config.my.enable
 
     BLOCKED = frozenset({
@@ -205,7 +210,7 @@ class MyTool(Tool):
 
     def _resolve_path(self, path: str) -> tuple[Any, str | None]:
         parts = path.split(".")
-        obj = self._runtime_state
+        obj: Any = self._runtime_state
         for part in parts:
             if part in self._DENIED_ATTRS or part.startswith("__"):
                 return None, f"'{part}' is not accessible"
@@ -215,8 +220,9 @@ class MyTool(Tool):
                 return None, f"'{part}' is not accessible"
             try:
                 if isinstance(obj, Mapping):
-                    if part in obj:
-                        obj = obj[part]
+                    mapping = cast(Mapping[str, Any], obj)
+                    if part in mapping:
+                        obj = mapping[part]
                     else:
                         return None, f"'{part}' not found in mapping"
                 else:
@@ -259,28 +265,40 @@ class MyTool(Tool):
             detail = MyTool._format_status(val, "  ")
             return f"{header}\n  task: {val.task_description}\n{detail}"
         # SubagentManager: delegate to its _task_statuses dict
-        if hasattr(val, "_task_statuses") and isinstance(val._task_statuses, dict):
-            return MyTool._format_value(val._task_statuses, key)
-        if isinstance(val, Mapping) and val and _is_subagent_status(next(iter(val.values()))):
+        task_statuses = getattr(val, "_task_statuses", None)
+        if isinstance(task_statuses, dict):
+            return MyTool._format_value(task_statuses, key)
+        if isinstance(val, Mapping):
+            mapping = cast(Mapping[object, object], val)
+        else:
+            mapping = None
+        if (
+            mapping
+            and _is_subagent_status(next(iter(mapping.values())))
+        ):
+            status_mapping: Mapping[object, SubagentStatus] = cast(Any, mapping)
             prefix = f"{key}: " if key else ""
-            lines = [f"{prefix}{len(val)} subagent(s):"]
-            for tid, st in val.items():
+            lines = [f"{prefix}{len(status_mapping)} subagent(s):"]
+            for tid, st in status_mapping.items():
                 detail = MyTool._format_status(st, "    ")
                 lines.append(f"  [{tid}] '{st.label}'\n{detail}")
             return "\n".join(lines)
-        if hasattr(val, "tool_names"):
-            return f"tools: {len(val.tool_names)} registered — {val.tool_names}"
+        dynamic_value = cast(Any, val)
+        if hasattr(dynamic_value, "tool_names"):
+            tool_names: Any = getattr(dynamic_value, "tool_names")
+            return f"tools: {len(tool_names)} registered — {tool_names}"
         # Scalar types — repr is fine
         if isinstance(val, (str, int, float, bool, type(None))):
             r = repr(val)
             return f"{key}: {r}" if key else r
         # Mapping — small: show content; large: show keys for dot-path navigation
         if isinstance(val, Mapping):
-            ks = list(val.keys())
+            value_mapping = cast(Mapping[object, object], val)
+            ks = list(value_mapping.keys())
             if not ks:
                 return f"{key}: {{}}" if key else "{}"
             if len(ks) <= 5:
-                r = repr(val)
+                r = repr(value_mapping)
                 if len(r) <= 200:
                     return f"{key}: {r}" if key else r
             preview = ", ".join(str(k) for k in ks[:15])
@@ -288,18 +306,20 @@ class MyTool(Tool):
             return f"{key}: {{{preview}{suffix}}}" if key else f"{{{preview}{suffix}}}"
         # List/tuple — count for large, repr for small
         if isinstance(val, (list, tuple)):
-            if len(val) > 20:
-                return f"{key}: [{len(val)} items]" if key else f"[{len(val)} items]"
-            r = repr(val)
+            sequence = cast(list[object] | tuple[object, ...], val)
+            if len(sequence) > 20:
+                return f"{key}: [{len(sequence)} items]" if key else f"[{len(sequence)} items]"
+            r = repr(sequence)
             return f"{key}: {r}" if key else r
         # Complex object — small Pydantic models: show values; others: show field names for navigation
-        cls_name = type(val).__name__
-        model_fields = getattr(type(val), "model_fields", None)
-        if model_fields:
-            fields = list(model_fields.keys())
+        value_type = type(cast(object, val))
+        cls_name = value_type.__name__
+        model_fields = cast(object, getattr(value_type, "model_fields", None))
+        if isinstance(model_fields, Mapping) and model_fields:
+            fields = list(cast(Mapping[str, object], model_fields).keys())
             if len(fields) <= 8:
                 # Small config objects: show field=value pairs
-                pairs = []
+                pairs: list[str] = []
                 for f in fields:
                     fv = getattr(val, f, "?")
                     if MyTool._is_sensitive_field_name(f):
@@ -311,7 +331,8 @@ class MyTool(Tool):
                 preview = ", ".join(pairs)
                 return f"{key}: {preview}" if key else preview
         else:
-            fields = [a for a in getattr(val, "__dict__", {}) if not a.startswith("__")]
+            attributes = cast(dict[str, Any], getattr(val, "__dict__", {}))
+            fields = [name for name in attributes if not name.startswith("__")]
         if fields:
             preview = ", ".join(str(f) for f in fields[:20])
             suffix = ", ..." if len(fields) > 20 else ""
@@ -417,6 +438,7 @@ class MyTool(Tool):
     def _modify(self, key: str | None, value: Any) -> str:
         if err := self._validate_key(key):
             return err
+        key = cast(str, key)
         top = key.split(".")[0]
         if top in self.BLOCKED or top in self._DENIED_ATTRS or top.startswith("__") or top.lower() in self._SENSITIVE_NAMES:
             self._audit("modify", f"BLOCKED {key}")
@@ -478,7 +500,7 @@ class MyTool(Tool):
 
     def _modify_restricted(self, key: str, value: Any) -> str:
         spec = self.RESTRICTED[key]
-        expected = spec["type"]
+        expected = cast(type[Any], spec["type"])
         if expected is int and isinstance(value, bool):
             return ToolResult.error(f"Error: '{key}' must be {expected.__name__}, got bool")
         if not isinstance(value, expected):
@@ -499,9 +521,9 @@ class MyTool(Tool):
                 "during an active session; use a configured model_preset"
             )
         if key == "model":
-            self._runtime_state.set_runtime_model(value)
+            self._runtime_state.set_runtime_model(cast(str, value))
         elif key == "context_window_tokens":
-            self._runtime_state.set_runtime_context_window(value)
+            self._runtime_state.set_runtime_context_window(cast(int, value))
         else:
             setattr(self._runtime_state, key, value)
         if key == "max_iterations" and hasattr(
@@ -516,7 +538,8 @@ class MyTool(Tool):
         if _has_real_attr(self._runtime_state, key):
             old = getattr(self._runtime_state, key)
             if isinstance(old, (str, int, float, bool)):
-                old_t, new_t = type(old), type(value)
+                old_t: type[Any] = type(old)
+                new_t = cast(type[Any], type(value))
                 if old_t is float and new_t is int:
                     pass  # int → float coercion allowed
                 elif old_t is not new_t:
@@ -555,12 +578,12 @@ class MyTool(Tool):
         if isinstance(value, (str, int, float, bool, type(None))):
             return None
         if isinstance(value, list):
-            for i, item in enumerate(value):
+            for i, item in enumerate(cast(list[Any], value)):
                 if err := cls._validate_json_safe(item, depth + 1):
                     return f"list[{i}] contains {err}"
             return None
         if isinstance(value, dict):
-            for k, v in value.items():
+            for k, v in cast(dict[Any, Any], value).items():
                 if not isinstance(k, str):
                     return f"dict key must be str, got {type(k).__name__}"
                 if err := cls._validate_json_safe(v, depth + 1):

nanobot/agent/tools/shell.py

@@ -18,13 +18,14 @@ from loguru import logger
 from pydantic import Field
 
 from nanobot.agent.tools.base import Tool, ToolResult, tool_parameters
-from nanobot.agent.tools.context import current_request_session_key
+from nanobot.agent.tools.context import ToolContext, current_request_session_key
 from nanobot.agent.tools.exec_session import (
     DEFAULT_EXEC_SESSION_MANAGER,
     DEFAULT_MAX_OUTPUT_CHARS,
     DEFAULT_YIELD_MS,
     MAX_OUTPUT_CHARS,
     MAX_YIELD_MS,
+    ExecSessionManager,
     clamp_session_int,
     format_session_poll,
 )
@@ -174,11 +175,11 @@ class ExecTool(Tool):
         return ExecToolConfig
 
     @classmethod
-    def enabled(cls, ctx: Any) -> bool:
+    def enabled(cls, ctx: ToolContext) -> bool:
         return ctx.config.exec.enable
 
     @classmethod
-    def create(cls, ctx: Any) -> Tool:
+    def create(cls, ctx: ToolContext) -> Tool:
         cfg = ctx.config.exec
         return cls(
             working_dir=ctx.workspace,
@@ -193,7 +194,7 @@ class ExecTool(Tool):
             allowed_env_keys=cfg.allowed_env_keys,
             allow_patterns=cfg.allow_patterns,
             deny_patterns=cfg.deny_patterns,
-            session_manager=getattr(ctx, "exec_session_manager", None),
+            session_manager=ctx.exec_session_manager,
         )
 
     def __init__(
@@ -211,7 +212,7 @@ class ExecTool(Tool):
         sandbox_ro_binds: list[str] | None = None,
         sandbox_rw_binds: list[str] | None = None,
         allowed_env_keys: list[str] | None = None,
-        session_manager: Any | None = None,
+        session_manager: ExecSessionManager | None = None,
     ):
         self.timeout = timeout
         self.working_dir = working_dir
@@ -344,7 +345,7 @@ class ExecTool(Tool):
             # misses it, leaving a zombie.
             _reap_pid(process.pid)
 
-            output_parts = []
+            output_parts: list[str] = []
 
             if stdout:
                 output_parts.append(stdout.decode("utf-8", errors="replace"))
@@ -504,7 +505,7 @@ class ExecTool(Tool):
         )
 
     def _compose_path(self, current_path: str) -> str:
-        parts = []
+        parts: list[str] = []
         if self.path_prepend:
             parts.append(self.path_prepend)
         if current_path:
@@ -514,7 +515,7 @@ class ExecTool(Tool):
         return os.pathsep.join(parts)
 
     def _wrap_path_export(self, command: str, env: dict[str, str]) -> str:
-        segments = []
+        segments: list[str] = []
         if self.path_prepend:
             env["NANOBOT_PATH_PREPEND"] = self.path_prepend
             segments.append("$NANOBOT_PATH_PREPEND")
@@ -568,11 +569,21 @@ class ExecTool(Tool):
                 env=env,
             )
         shell_program = shell_program or shutil.which("bash") or "/bin/bash"
-        args = [shell_program]
+        args: list[str] = [shell_program]
         shell_name = Path(shell_program).name.lower()
         if login and shell_name in {"bash", "bash.exe", "zsh", "zsh.exe"}:
             args.append("-l")
         args.extend(["-c", command])
+        if process_tree:
+            return await asyncio.create_subprocess_exec(
+                *args,
+                stdin=stdin,
+                stdout=asyncio.subprocess.PIPE,
+                stderr=asyncio.subprocess.PIPE,
+                cwd=cwd,
+                env=env,
+                start_new_session=True,
+            )
         return await asyncio.create_subprocess_exec(
             *args,
             stdin=stdin,
@@ -580,7 +591,6 @@ class ExecTool(Tool):
             stderr=asyncio.subprocess.PIPE,
             cwd=cwd,
             env=env,
-            **({"start_new_session": True} if process_tree else {}),
         )
 
     @staticmethod

nanobot/agent/tools/spawn.py

@@ -1,5 +1,7 @@
 """Spawn tool for creating background subagents."""
 
+# pyright: reportIncompatibleMethodOverride=false
+
 from __future__ import annotations
 
 from typing import TYPE_CHECKING, Any
@@ -16,6 +18,7 @@ from nanobot.security.workspace_access import current_workspace_scope
 
 if TYPE_CHECKING:
     from nanobot.agent.subagent import SubagentManager
+    from nanobot.agent.tools.context import ToolContext
 
 
 @tool_parameters(
@@ -49,8 +52,11 @@ class SpawnTool(Tool):
         self._manager = manager
 
     @classmethod
-    def create(cls, ctx: Any) -> Tool:
-        return cls(manager=ctx.subagent_manager)
+    def create(cls, ctx: ToolContext) -> Tool:
+        manager = ctx.subagent_manager
+        if manager is None:
+            raise RuntimeError("SpawnTool requires an initialized subagent manager")
+        return cls(manager=manager)
 
     @property
     def name(self) -> str:

nanobot/agent/tools/web.py

@@ -1,5 +1,7 @@
 """Web tools: web_search and web_fetch."""
 
+# pyright: reportIncompatibleMethodOverride=false
+
 from __future__ import annotations
 
 import asyncio
@@ -7,7 +9,8 @@ import html
 import json
 import os
 import re
-from typing import Any, Callable
+from collections.abc import Callable
+from typing import Any, cast
 from urllib.parse import quote, urljoin, urlparse
 
 import httpx
@@ -15,6 +18,7 @@ from loguru import logger
 from pydantic import Field
 
 from nanobot.agent.tools.base import Tool, ToolResult, tool_parameters
+from nanobot.agent.tools.context import ToolContext
 from nanobot.agent.tools.schema import (
     BooleanSchema,
     IntegerSchema,
@@ -291,8 +295,8 @@ class WebSearchTool(Tool):
     """Search the web using configured provider."""
     _scopes = {"core", "subagent"}
 
-    name = "web_search"
-    description = (
+    name = "web_search"  # pyright: ignore[reportIncompatibleMethodOverride, reportAssignmentType]
+    description = (  # pyright: ignore[reportIncompatibleMethodOverride, reportAssignmentType]
         "Search the web. Returns titles, URLs, and snippets. "
         "count defaults to 5 (max 10). "
         "Some providers support timeRange, authLevel, and queryRewrite. "
@@ -302,20 +306,21 @@ class WebSearchTool(Tool):
     config_key = "web"
 
     @classmethod
-    def config_cls(cls):
+    def config_cls(cls) -> type[WebToolsConfig]:
         return WebToolsConfig
 
     @classmethod
-    def enabled(cls, ctx: Any) -> bool:
+    def enabled(cls, ctx: ToolContext) -> bool:
         return ctx.config.web.enable
 
     @classmethod
-    def create(cls, ctx: Any) -> Tool:
-        config_loader = None
+    def create(cls, ctx: ToolContext) -> Tool:
+        config_loader: Callable[[], WebSearchConfig] | None = None
         if ctx.provider_snapshot_loader is not None:
-            def config_loader():
+            def _load_search_config() -> WebSearchConfig:
                 from nanobot.config.loader import load_config, resolve_config_env_vars
                 return resolve_config_env_vars(load_config()).tools.web.search
+            config_loader = _load_search_config
         return cls(
             config=ctx.config.web.search,
             proxy=ctx.config.web.proxy,
@@ -404,7 +409,7 @@ class WebSearchTool(Tool):
         auth_level: int | None = None,
         query_rewrite: bool | None = None,
         **kwargs: Any,
-    ) -> str:
+    ) -> str:  # pyright: ignore[reportIncompatibleMethodOverride]
         self._refresh_config()
         provider = self.config.provider.strip().lower() or "brave"
         n = min(max(count or self.config.max_results, 1), 10)
@@ -448,15 +453,20 @@ class WebSearchTool(Tool):
 
     async def _search_olostep(self, query: str, n: int) -> str:
         try:
-            from olostep import AsyncOlostep, Olostep_BaseError
+            from olostep import (  # pyright: ignore[reportMissingImports]
+                AsyncOlostep,  # pyright: ignore[reportUnknownVariableType]
+                Olostep_BaseError,  # pyright: ignore[reportUnknownVariableType]
+            )
         except ImportError:
             return ToolResult.error("Error: olostep package not installed. Run: pip install olostep")
+        async_olostep = cast(Any, AsyncOlostep)
+        olostep_base_error = cast(type[Exception], Olostep_BaseError)
         api_key = self.config.api_key or os.environ.get("OLOSTEP_API_KEY", "")
         if not api_key:
             logger.warning("OLOSTEP_API_KEY not set, falling back to DuckDuckGo")
             return await self._search_duckduckgo(query, n)
         try:
-            async with AsyncOlostep(api_key=api_key) as client:
+            async with async_olostep(api_key=api_key) as client:
                 if self.proxy:
                     transport = getattr(client, "_transport", None)
                     http_client = getattr(transport, "_client", None)
@@ -472,14 +482,16 @@ class WebSearchTool(Tool):
                             ),
                             http2=True,
                         )
-                result = await client.answers.create(task=query)
+                result: Any = await client.answers.create(task=query)
 
-            sources = getattr(result, "sources", None) or []
-            source_lines = []
-            for i, source in enumerate(sources[:n], 1):
+            sources = cast(list[Any], getattr(result, "sources", None) or [])
+            source_lines: list[str] = []
+            for i, source_value in enumerate(sources[:n], 1):
+                source: Any = source_value
                 if isinstance(source, dict):
-                    title = source.get("title", "")
-                    url = source.get("url", "")
+                    source_dict = cast(dict[str, Any], source)
+                    title = source_dict.get("title", "")
+                    url = source_dict.get("url", "")
                 else:
                     title = getattr(source, "title", "")
                     url = getattr(source, "url", "")
@@ -493,7 +505,7 @@ class WebSearchTool(Tool):
             answer_text = getattr(result, "answer", "") or ""
             items = [{"title": answer_text or "Olostep answer", "url": "", "content": "\n".join(source_lines)}]
             return _format_results(query, items, n)
-        except Olostep_BaseError as e:
+        except olostep_base_error as e:
             return ToolResult.error(f"Error: Olostep search error: {type(e).__name__}: {e}")
         except Exception as e:
             return ToolResult.error(f"Error: Olostep search error: {type(e).__name__}: {e}")
@@ -510,6 +522,7 @@ class WebSearchTool(Tool):
                 "User-Agent": self.user_agent,
             }
             async with httpx.AsyncClient(proxy=self.proxy) as client:
+                r: httpx.Response | None = None
                 for attempt in range(2):
                     r = await client.get(
                         "https://api.search.brave.com/res/v1/web/search",
@@ -522,6 +535,7 @@ class WebSearchTool(Tool):
                     if attempt == 0:
                         logger.warning("Brave search rate limited; retrying once in 1.0s")
                         await asyncio.sleep(1.0)
+                assert r is not None
                 r.raise_for_status()
             items = [
                 {"title": x.get("title", ""), "url": x.get("url", ""), "content": x.get("description", "")}
@@ -691,13 +705,19 @@ class WebSearchTool(Tool):
                     timeout=float(self.config.timeout),
                 )
                 r.raise_for_status()
-            items = []
-            for result in r.json().get("results", []):
-                if not isinstance(result, dict):
+            data = cast(dict[str, Any], r.json())
+            items: list[dict[str, Any]] = []
+            for result_value in cast(list[object], data.get("results", [])):
+                if not isinstance(result_value, dict):
                     continue
-                highlights = result.get("highlights") or []
+                result = cast(dict[str, Any], result_value)
+                highlights: Any = result.get("highlights") or []
                 if isinstance(highlights, list):
-                    content = "\n".join(str(highlight) for highlight in highlights if highlight)
+                    content = "\n".join(
+                        str(highlight)
+                        for highlight in cast(list[object], highlights)
+                        if highlight
+                    )
                 else:
                     content = str(highlights)
                 if not content:
@@ -737,14 +757,17 @@ class WebSearchTool(Tool):
                     timeout=float(self.config.timeout),
                 )
                 r.raise_for_status()
-            items = [
+            data = cast(dict[str, Any], r.json())
+            organic = cast(list[object], data.get("organic", []))
+            items: list[dict[str, Any]] = [
                 {
                     "title": result.get("title", ""),
                     "url": result.get("link", ""),
                     "content": result.get("snippet", ""),
                 }
-                for result in r.json().get("organic", [])
-                if isinstance(result, dict)
+                for result_value in organic
+                if isinstance(result_value, dict)
+                for result in (cast(dict[str, Any], result_value),)
             ]
             return _format_results(query, items, n)
         except httpx.HTTPStatusError as e:
@@ -806,7 +829,7 @@ class WebSearchTool(Tool):
                     timeout=float(self.config.timeout),
                 )
                 r.raise_for_status()
-            data = r.json()
+            data = cast(dict[str, Any], r.json())
         except httpx.HTTPStatusError as e:
             if e.response.status_code == 429:
                 return ToolResult.error("Error: Volcengine search rate limited. Try again later or reduce search frequency.")
@@ -814,20 +837,36 @@ class WebSearchTool(Tool):
         except Exception as e:
             return ToolResult.error(f"Error: Volcengine search failed: {e}")
 
-        error = (data.get("ResponseMetadata") or {}).get("Error") or data.get("Error") or data.get("error")
+        response_metadata = cast(
+            dict[str, Any],
+            data.get("ResponseMetadata") or {},
+        )
+        error = (
+            response_metadata.get("Error")
+            or data.get("Error")
+            or data.get("error")
+        )
         if error:
             if isinstance(error, dict):
+                error = cast(dict[str, Any], error)
                 code = error.get("Code") or error.get("code") or "unknown"
                 message = error.get("Message") or error.get("message") or error
                 return ToolResult.error(f"Error: Volcengine search error {code}: {message}")
             return ToolResult.error(f"Error: Volcengine search error: {error}")
 
-        result = data.get("Result") or data
-        web_results = result.get("WebResults") or result.get("webResults") or result.get("results") or []
+        result = cast(dict[str, Any], data.get("Result") or data)
+        web_results = cast(
+            list[object],
+            result.get("WebResults")
+            or result.get("webResults")
+            or result.get("results")
+            or [],
+        )
         items: list[dict[str, Any]] = []
-        for item in web_results:
-            if not isinstance(item, dict):
+        for item_value in web_results:
+            if not isinstance(item_value, dict):
                 continue
+            item = cast(dict[str, Any], item_value)
             meta_parts = [
                 str(part)
                 for part in (
@@ -837,7 +876,7 @@ class WebSearchTool(Tool):
                 )
                 if part
             ]
-            summary = (
+            summary = cast(str, (
                 item.get("Summary")
                 or item.get("summary")
                 or item.get("Snippet")
@@ -845,7 +884,7 @@ class WebSearchTool(Tool):
                 or item.get("Content")
                 or item.get("content")
                 or ""
-            )
+            ))
             content = "\n".join(part for part in (" | ".join(meta_parts), summary) if part)
             items.append(
                 {
@@ -861,18 +900,20 @@ class WebSearchTool(Tool):
         try:
             # Note: duckduckgo_search is synchronous and does its own requests
             # We run it in a thread to avoid blocking the loop
-            from ddgs import DDGS
+            from ddgs import DDGS  # pyright: ignore[reportUnknownVariableType]
 
-            ddgs = DDGS(timeout=10, proxy=self.proxy)
+            ddgs_type = cast(Any, DDGS)
+            ddgs = ddgs_type(timeout=10, proxy=self.proxy)
             raw = await asyncio.wait_for(
                 asyncio.to_thread(ddgs.text, query, max_results=n),
                 timeout=self.config.timeout,
             )
             if not raw:
                 return f"No results for: {query}"
-            items = [
+            raw_items = cast(list[dict[str, Any]], raw)
+            items: list[dict[str, Any]] = [
                 {"title": r.get("title", ""), "url": r.get("href", ""), "content": r.get("body", "")}
-                for r in raw
+                for r in raw_items
             ]
             return _format_results(query, items, n)
         except Exception as e:
@@ -907,15 +948,19 @@ class WebSearchTool(Tool):
                 if r.status_code == 429:
                     return ToolResult.error("Error: Bocha search rate-limited (HTTP 429). Wait and retry.")
                 r.raise_for_status()
-            data = r.json()
-            wrapped_data = data.get("data") if isinstance(data, dict) else None
-            result_data = wrapped_data if isinstance(wrapped_data, dict) else data
-            web_pages = (
-                result_data.get("webPages", {}).get("value", [])
-                if isinstance(result_data, dict)
-                else []
+            data = cast(dict[str, Any], r.json())
+            wrapped_data = data.get("data")
+            result_data = (
+                cast(dict[str, Any], wrapped_data)
+                if isinstance(wrapped_data, dict)
+                else data
             )
-            items = [
+            web_pages_data = cast(
+                dict[str, Any],
+                result_data.get("webPages", {}),
+            )
+            web_pages = cast(list[dict[str, Any]], web_pages_data.get("value", []))
+            items: list[dict[str, Any]] = [
                 {
                     "title": x.get("name", ""),
                     "url": x.get("url", ""),
@@ -946,8 +991,8 @@ class WebFetchTool(Tool):
     """Fetch and extract content from a URL."""
     _scopes = {"core", "subagent"}
 
-    name = "web_fetch"
-    description = (
+    name = "web_fetch"  # pyright: ignore[reportIncompatibleMethodOverride, reportAssignmentType]
+    description = (  # pyright: ignore[reportIncompatibleMethodOverride, reportAssignmentType]
         "Fetch a URL and extract readable content (HTML → markdown/text). "
         "Output is capped at maxChars (default 50 000). "
         "Works for most web pages and docs; may fail on login-walled or JS-heavy sites."
@@ -956,15 +1001,15 @@ class WebFetchTool(Tool):
     config_key = "web"
 
     @classmethod
-    def config_cls(cls):
+    def config_cls(cls) -> type[WebToolsConfig]:
         return WebToolsConfig
 
     @classmethod
-    def enabled(cls, ctx: Any) -> bool:
+    def enabled(cls, ctx: ToolContext) -> bool:
         return ctx.config.web.enable
 
     @classmethod
-    def create(cls, ctx: Any) -> Tool:
+    def create(cls, ctx: ToolContext) -> Tool:
         return cls(
             config=ctx.config.web.fetch,
             proxy=ctx.config.web.proxy,
@@ -987,10 +1032,10 @@ class WebFetchTool(Tool):
         extract_mode: str = "markdown",
         max_chars: int | None = None,
         **kwargs: Any,
-    ) -> Any:
+    ) -> Any:  # pyright: ignore[reportIncompatibleMethodOverride]
         url = url.strip(" \t\r\n`\"'")
         extract_mode = kwargs.pop("extractMode", extract_mode)
-        max_chars = kwargs.pop("maxChars", max_chars) or self.max_chars
+        max_chars = cast(int, kwargs.pop("maxChars", max_chars) or self.max_chars)
         is_valid, error_msg = _validate_url_safe(url)
         if not is_valid:
             return json.dumps({"error": f"URL validation failed: {error_msg}", "url": url}, ensure_ascii=False)
@@ -1119,10 +1164,10 @@ class WebFetchTool(Tool):
             return json.dumps({"error": str(e), "url": url}, ensure_ascii=False)
 
     def _extract_readable_html(self, html_content: str, extract_mode: str) -> str:
-        from readability import Document
+        from readability import Document  # pyright: ignore[reportMissingTypeStubs]
 
         doc = Document(html_content)
-        summary = doc.summary()
+        summary = cast(str, doc.summary())
         content = self._to_markdown(summary) if extract_mode == "markdown" else _strip_tags(summary)
         return f"# {doc.title()}\n\n{content}" if doc.title() else content
 

nanobot/agent/turn_delivery.py

@@ -6,7 +6,7 @@ import dataclasses
 import time
 from collections.abc import Awaitable, Callable
 from dataclasses import dataclass, field
-from typing import Any
+from typing import TYPE_CHECKING, Any, cast
 
 from nanobot.bus.events import InboundMessage, OutboundMessage
 from nanobot.bus.outbound_events import (
@@ -20,6 +20,9 @@ from nanobot.bus.progress import build_bus_progress_callback
 from nanobot.bus.queue import MessageBus
 from nanobot.bus.runtime_events import RuntimeEventBus, RuntimeEventPublisher
 
+if TYPE_CHECKING:
+    from nanobot.utils.llm_runtime import LLMRuntime
+
 
 @dataclass(frozen=True)
 class TurnRoute:
@@ -62,7 +65,7 @@ class TurnDeliveryFactory:
         route = self._default_route(msg, session_key)
         if self.route_policy is not None:
             route = self.route_policy(msg, session_key, route)
-            if not isinstance(route, TurnRoute):
+            if not isinstance(cast(object, route), TurnRoute):
                 raise TypeError("turn route policy must return TurnRoute")
         return TurnDelivery(
             bus=self.bus,
@@ -186,7 +189,7 @@ class TurnDelivery:
                 started_at=started_at,
             )
 
-    def record_runtime(self, runtime: Any) -> None:
+    def record_runtime(self, runtime: LLMRuntime) -> None:
         self.runtime_event_publisher.record_turn_runtime(self.session_key, runtime)
 
     def record_latency(self, latency_ms: int | None) -> None:

nanobot/api/runtime.py

@@ -35,7 +35,7 @@ def api_runtime_paths(config_path: Path) -> ProcessRuntimePaths:
     )
 
 
-class ApiRuntime(ManagedProcessRuntime):
+class ApiRuntime(ManagedProcessRuntime[ApiStartOptions]):
     """Manage a WebUI-controlled OpenAI-compatible API process."""
 
     service_name = "api"

nanobot/api/server.py

@@ -12,7 +12,7 @@ import hmac
 import json as _json
 import time
 import uuid
-from typing import Any
+from typing import TYPE_CHECKING, Any, Awaitable, Callable, cast
 
 from aiohttp import web
 from loguru import logger
@@ -30,6 +30,9 @@ from nanobot.utils.media_decode import (
 )
 from nanobot.utils.runtime import EMPTY_FINAL_RESPONSE_MESSAGE
 
+if TYPE_CHECKING:
+    from nanobot.agent.loop import AgentLoop
+
 __all__ = (
     "MAX_FILE_SIZE",
     "_FileSizeExceeded",
@@ -44,7 +47,7 @@ API_CHAT_ID = "default"
 _AGENT_LOOP_KEY = web.AppKey[Any]("agent_loop")
 _MODEL_NAME_KEY = web.AppKey[str]("model_name")
 _REQUEST_TIMEOUT_KEY = web.AppKey[float]("request_timeout")
-_SESSION_LOCKS_KEY = web.AppKey[dict]("session_locks")
+_SESSION_LOCKS_KEY = web.AppKey[dict[str, asyncio.Lock]]("session_locks")
 _MISSING = object()
 
 
@@ -111,6 +114,26 @@ def _response_text(value: Any) -> str:
         return str(getattr(value, "content") or "")
     return str(value)
 
+
+def _as_str(value: object) -> str:
+    """Return *value* when it is text, otherwise an empty string."""
+    return value if isinstance(value, str) else ""
+
+
+def _require_json_object(value: object, field: str) -> dict[str, Any]:
+    """Validate an object-valued field from an untrusted JSON request."""
+    if not isinstance(value, dict):
+        raise TypeError(f"{field} must be an object")
+    return cast(dict[str, Any], value)
+
+
+def _require_json_string(value: object, field: str) -> str:
+    """Validate a string-valued field from an untrusted JSON request."""
+    if not isinstance(value, str):
+        raise TypeError(f"{field} must be a string")
+    return value
+
+
 # ---------------------------------------------------------------------------
 # SSE helpers
 # ---------------------------------------------------------------------------
@@ -141,13 +164,19 @@ _SSE_DONE = b"data: [DONE]\n\n"
 # ---------------------------------------------------------------------------
 
 
-def _parse_json_content(body: dict) -> tuple[str, list[str]]:
+def _parse_json_content(body: dict[str, Any]) -> tuple[str, list[str]]:
     """Parse JSON request body. Returns (text, media_paths)."""
-    messages = body.get("messages")
-    if not isinstance(messages, list) or len(messages) != 1:
+    messages_value = cast(object, body.get("messages"))
+    if not isinstance(messages_value, list):
         raise ValueError("Only a single user message is supported")
-    message = messages[0]
-    if not isinstance(message, dict) or message.get("role") != "user":
+    messages = cast(list[object], messages_value)
+    if len(messages) != 1:
+        raise ValueError("Only a single user message is supported")
+    message_value: object = messages[0]
+    if not isinstance(message_value, dict):
+        raise ValueError("Only a single user message is supported")
+    message = cast(dict[str, Any], message_value)
+    if message.get("role") != "user":
         raise ValueError("Only a single user message is supported")
 
     user_content = message.get("content", "")
@@ -156,13 +185,26 @@ def _parse_json_content(body: dict) -> tuple[str, list[str]]:
 
     if isinstance(user_content, list):
         text_parts: list[str] = []
-        for part in user_content:
-            if not isinstance(part, dict):
+        for part_value in cast(list[object], user_content):
+            if not isinstance(part_value, dict):
                 continue
+            part = cast(dict[str, Any], part_value)
             if part.get("type") == "text":
-                text_parts.append(part.get("text", ""))
+                text_parts.append(
+                    _require_json_string(
+                        cast(object, part.get("text", "")),
+                        "messages[0].content[].text",
+                    )
+                )
             elif part.get("type") == "image_url":
-                url = part.get("image_url", {}).get("url", "")
+                image_url = _require_json_object(
+                    cast(object, part.get("image_url", {})),
+                    "messages[0].content[].image_url",
+                )
+                url = _require_json_string(
+                    cast(object, image_url.get("url", "")),
+                    "messages[0].content[].image_url.url",
+                )
                 if url.startswith("data:"):
                     saved = _save_base64_data_url(url, media_dir)
                     if saved:
@@ -191,7 +233,7 @@ async def _parse_multipart(request: web.Request) -> tuple[str, list[str], str |
     media_paths: list[str] = []
 
     while True:
-        part = await reader.next()
+        part: Any = await reader.next()
         if part is None:
             break
         if part.name == "message":
@@ -223,11 +265,9 @@ async def _parse_multipart(request: web.Request) -> tuple[str, list[str], str |
 # ---------------------------------------------------------------------------
 
 
-async def handle_chat_completions(request: web.Request) -> web.Response:
+async def handle_chat_completions(request: web.Request) -> web.Response | web.StreamResponse:
     """POST /v1/chat/completions — supports JSON and multipart/form-data."""
-    content_type = request.content_type or ""
-    if not isinstance(content_type, str):
-        content_type = ""
+    content_type = _as_str(cast(object, request.content_type or ""))
 
     agent_loop = _app_value(request.app, _AGENT_LOOP_KEY, "agent_loop")
     timeout_s: float = _app_value(
@@ -247,6 +287,9 @@ async def handle_chat_completions(request: web.Request) -> web.Response:
                 body = await request.json()
             except Exception:
                 return _error_json(400, "Invalid JSON body")
+            if not isinstance(body, dict):
+                return _error_json(400, "Invalid JSON body")
+            body = cast(dict[str, Any], body)
             stream = body.get("stream", False)
             requested_model = body.get("model")
             text, media_paths = _parse_json_content(body)
@@ -405,7 +448,7 @@ async def handle_health(request: web.Request) -> web.Response:
 
 
 def create_app(
-    agent_loop,
+    agent_loop: "AgentLoop",
     model_name: str = "nanobot",
     request_timeout: float = 120.0,
     api_key: str = "",
@@ -425,7 +468,10 @@ def create_app(
     app[_SESSION_LOCKS_KEY] = {}  # per-user locks, keyed by session_key
 
     @web.middleware
-    async def auth_middleware(request: web.Request, handler) -> web.StreamResponse:
+    async def auth_middleware(
+        request: web.Request,
+        handler: Callable[[web.Request], Awaitable[web.StreamResponse]],
+    ) -> web.StreamResponse:
         # Allow unauthenticated health checks.
         if request.path == "/health":
             return await handler(request)

nanobot/apps/cli/service.py

@@ -10,10 +10,11 @@ import shutil
 import subprocess
 import sys
 import time
+from collections.abc import Iterable
 from dataclasses import dataclass
 from importlib import metadata as importlib_metadata
 from pathlib import Path
-from typing import Any
+from typing import Any, cast
 from urllib.parse import urlparse
 
 import httpx
@@ -204,6 +205,11 @@ def _now() -> float:
     return time.time()
 
 
+def _as_object_dict(value: object) -> dict[str, Any] | None:
+    """Narrow a JSON-like object to the string-keyed mapping used by this module."""
+    return cast(dict[str, Any], value) if isinstance(value, dict) else None
+
+
 def _safe_skill_name(name: str) -> str:
     clean = _SAFE_NAME_RE.sub("-", name.lower()).strip("-")
     return f"cli-app-{clean or 'app'}"
@@ -277,10 +283,11 @@ def _console_script_distribution(entry_point: str) -> str | None:
             if item.group != "console_scripts" or item.name != entry_point:
                 continue
             try:
-                name = distribution.metadata.get("Name")
+                name: object = cast(Any, distribution.metadata).get("Name")
             except Exception:
                 name = None
-            return str(name or getattr(distribution, "name", "") or "").strip() or None
+            fallback_name = cast(object, getattr(distribution, "name", ""))
+            return str(name or fallback_name or "").strip() or None
     return None
 
 
@@ -335,10 +342,10 @@ def _brand_payload(app: dict[str, Any]) -> tuple[str | None, str | None]:
 
 def _read_json(path: Path) -> dict[str, Any] | None:
     try:
-        data = json.loads(path.read_text(encoding="utf-8"))
+        data: object = json.loads(path.read_text(encoding="utf-8"))
     except (OSError, json.JSONDecodeError):
         return None
-    return data if isinstance(data, dict) else None
+    return _as_object_dict(data)
 
 
 def _write_json(path: Path, data: dict[str, Any]) -> None:
@@ -414,8 +421,8 @@ class CliAppManager:
         cached = _read_json(cache_path)
         if not cached:
             return None, 0.0
-        data = cached.get("data")
-        if not isinstance(data, dict):
+        data = _as_object_dict(cached.get("data"))
+        if data is None:
             return None, 0.0
         try:
             cached_at = float(cached.get("_cached_at", 0))
@@ -425,8 +432,8 @@ class CliAppManager:
 
     def _load_installed(self) -> dict[str, Any]:
         data = _read_json(self.installed_path) or {}
-        apps = data.get("apps") if isinstance(data.get("apps"), dict) else data
-        return apps if isinstance(apps, dict) else {}
+        apps = _as_object_dict(data.get("apps"))
+        return apps if apps is not None else data
 
     def _save_installed(self, installed: dict[str, Any]) -> None:
         _write_json(self.installed_path, {"schema_version": 1, "apps": installed})
@@ -453,8 +460,8 @@ class CliAppManager:
         try:
             response = httpx.get(url, timeout=15.0, follow_redirects=True)
             response.raise_for_status()
-            fetched = response.json()
-            if not isinstance(fetched, dict):
+            fetched = _as_object_dict(response.json())
+            if fetched is None:
                 raise ValueError("registry response must be an object")
         except Exception:
             if data is not None:
@@ -483,8 +490,8 @@ class CliAppManager:
             async with httpx.AsyncClient(timeout=15.0, follow_redirects=True) as client:
                 response = await client.get(url)
             response.raise_for_status()
-            fetched = response.json()
-            if not isinstance(fetched, dict):
+            fetched = _as_object_dict(response.json())
+            if fetched is None:
                 raise ValueError("registry response must be an object")
         except Exception:
             if data is not None:
@@ -534,13 +541,14 @@ class CliAppManager:
         apps_by_name: dict[str, dict[str, Any]] = {}
         updated_values: list[str] = []
         for source, raw_base, registry in registries:
-            meta = registry.get("meta")
-            if isinstance(meta, dict) and isinstance(meta.get("updated"), str):
+            meta = _as_object_dict(registry.get("meta"))
+            if meta is not None and isinstance(meta.get("updated"), str):
                 updated_values.append(meta["updated"])
-            for row in registry.get("clis", []):
-                if not isinstance(row, dict) or not row.get("name"):
+            for row in cast(Iterable[object], registry.get("clis", [])):
+                entry = _as_object_dict(row)
+                if entry is None or not entry.get("name"):
                     continue
-                entry = dict(row)
+                entry = dict(entry)
                 entry["_source"] = source
                 entry["_raw_base"] = raw_base
                 key = str(entry["name"]).lower()
@@ -588,7 +596,7 @@ class CliAppManager:
         if not installed:
             return []
         installed_by_name = {
-            str(name).lower(): (str(name), data if isinstance(data, dict) else {})
+            str(name).lower(): (str(name), _as_object_dict(data) or {})
             for name, data in installed.items()
         }
         seen: set[str] = set()
@@ -769,12 +777,14 @@ class CliAppManager:
             for app in cached_apps
             if app.get("name")
         }
-        rows = []
+        rows: list[dict[str, Any]] = []
         for name, raw_entry in sorted(installed.items()):
-            entry = raw_entry if isinstance(raw_entry, dict) else {}
+            entry = _as_object_dict(raw_entry)
+            if entry is None:
+                entry = {}
             strategy = str(entry.get("strategy") or "bundled")
             cached_app = cached_by_name.get(str(name).lower(), {})
-            app = {
+            app: dict[str, Any] = {
                 "name": str(name),
                 "display_name": str(
                     cached_app.get("display_name") or entry.get("display_name") or name
@@ -1165,7 +1175,9 @@ Use the `run_cli_app` tool with `name="{name}"` for command execution. Do not in
         if str(app["name"]) not in installed:
             raise CliAppError("CLI app is not installed")
         raw_installed_entry = installed.get(str(app["name"]))
-        installed_entry = raw_installed_entry if isinstance(raw_installed_entry, dict) else {}
+        installed_entry = _as_object_dict(raw_installed_entry)
+        if installed_entry is None:
+            installed_entry = {}
         strategy = self._strategy(app)
         entry_point = str(app.get("entry_point") or "").strip()
         managed_entry_path = str(installed_entry.get("entry_point_path") or "").strip()

nanobot/apps/cli/utils.py

@@ -3,7 +3,7 @@
 from __future__ import annotations
 
 from pathlib import Path
-from typing import Any, Mapping
+from typing import Any, Mapping, cast
 
 
 def session_extra(metadata: Mapping[str, Any] | None) -> dict[str, Any]:
@@ -29,9 +29,11 @@ def runtime_lines_for_request(
     """Return CLI App annotations from an immutable request snapshot."""
     structured = metadata.get("cli_apps") if isinstance(metadata, Mapping) else None
     if isinstance(structured, list):
+        structured_items = cast(list[Any], structured)
         mentions = [
-            item for item in structured
-            if isinstance(item, Mapping) and isinstance(item.get("name"), str)
+            cast(Mapping[str, Any], item) for item in structured_items
+            if isinstance(item, Mapping)
+            and isinstance(cast(Mapping[str, Any], item).get("name"), str)
         ]
         if mentions:
             return [
@@ -49,7 +51,10 @@ def runtime_lines_for_request(
     try:
         from nanobot.apps.cli import CliAppManager
 
-        mentions = CliAppManager(workspace=workspace).mentioned_installed_apps(text)
+        mentions = cast(
+            list[dict[str, Any]],
+            CliAppManager(workspace=workspace).mentioned_installed_apps(text),
+        )
     except Exception:
         return []
     return [

nanobot/audio/transcription.py

@@ -22,6 +22,7 @@ from nanobot.audio.transcription_registry import (
 )
 from nanobot.config.loader import resolve_env_refs
 from nanobot.config.paths import get_media_dir
+from nanobot.config.schema import Config, ProviderConfig
 from nanobot.providers.registry import find_by_name
 from nanobot.utils.media_decode import FileSizeExceeded, save_base64_data_url
 
@@ -73,8 +74,9 @@ def _as_provider(value: Any) -> TranscriptionProviderName | None:
     return spec.name if spec else None
 
 
-def _provider_config(config: Any, provider: str) -> Any:
-    return getattr(getattr(config, "providers", None), provider, None)
+def _provider_config(config: Config, provider: str) -> ProviderConfig | None:
+    value = getattr(config.providers, provider, None)
+    return value if isinstance(value, ProviderConfig) else None
 
 
 def _provider_default_api_base(provider: str) -> str | None:
@@ -82,7 +84,10 @@ def _provider_default_api_base(provider: str) -> str | None:
     return spec.default_api_base if spec else None
 
 
-def _resolve_transcription_api_key(provider: str, provider_cfg: Any) -> str:
+def _resolve_transcription_api_key(
+    provider: str,
+    provider_cfg: ProviderConfig | None,
+) -> str:
     api_key = resolve_env_refs(getattr(provider_cfg, "api_key", None) or "") if provider_cfg else ""
     if api_key:
         return api_key
@@ -94,10 +99,13 @@ def _resolve_transcription_api_key(provider: str, provider_cfg: Any) -> str:
             return env_key
 
     env_key = spec.env_key if spec else ""
-    return os.environ.get(env_key) if env_key else ""
+    return os.environ.get(env_key, "") if env_key else ""
 
 
-def _resolve_transcription_api_base(provider: str, provider_cfg: Any) -> str:
+def _resolve_transcription_api_base(
+    provider: str,
+    provider_cfg: ProviderConfig | None,
+) -> str:
     api_base = resolve_env_refs(getattr(provider_cfg, "api_base", None) or "") if provider_cfg else ""
     if api_base:
         return api_base
@@ -111,7 +119,7 @@ def _extract_data_url_mime(url: str) -> str | None:
     return header[5:].split(";", 1)[0].strip().lower() or None
 
 
-def resolve_transcription_config(config: Any) -> EffectiveTranscriptionConfig:
+def resolve_transcription_config(config: Config) -> EffectiveTranscriptionConfig:
     """Resolve top-level transcription settings with legacy channel fallback."""
     top = getattr(config, "transcription", None)
     channels = getattr(config, "channels", None)

nanobot/bus/outbound_events.py

@@ -9,7 +9,7 @@ from __future__ import annotations
 
 from collections.abc import Mapping
 from dataclasses import dataclass, replace
-from typing import Any
+from typing import Any, cast
 
 from nanobot.bus.events import OutboundMessage
 
@@ -153,7 +153,11 @@ def _legacy_event_from_metadata(msg: OutboundMessage) -> OutboundEvent | None:
         )
     if meta.get("_goal_state_sync"):
         goal_state = meta.get("goal_state")
-        return GoalStateSyncEvent(goal_state if isinstance(goal_state, dict) else {"active": False})
+        return GoalStateSyncEvent(
+            cast(dict[str, Any], goal_state)
+            if isinstance(goal_state, dict)
+            else {"active": False}
+        )
     if meta.get("_goal_status"):
         status = meta.get("goal_status")
         if not isinstance(status, str) or not status:
@@ -166,7 +170,7 @@ def _legacy_event_from_metadata(msg: OutboundMessage) -> OutboundEvent | None:
         goal_state = meta.get("goal_state")
         return TurnEndEvent(
             latency_ms=_metadata_int(meta, "latency_ms"),
-            goal_state=goal_state if isinstance(goal_state, dict) else None,
+            goal_state=cast(dict[str, Any], goal_state) if isinstance(goal_state, dict) else None,
         )
     if meta.get("_session_updated"):
         return SessionUpdatedEvent(scope=_metadata_str(meta, "_session_update_scope"))
@@ -203,8 +207,12 @@ def _legacy_event_from_metadata(msg: OutboundMessage) -> OutboundEvent | None:
             reasoning_delta=bool(meta.get("_reasoning_delta")),
             reasoning_end=bool(meta.get("_reasoning_end")),
             stream_id=_metadata_str(meta, "_stream_id"),
-            tool_events=tool_events if isinstance(tool_events, list) else None,
-            file_edit_events=file_edit_events if isinstance(file_edit_events, list) else None,
+            tool_events=cast(list[dict[str, Any]], tool_events)
+            if isinstance(tool_events, list)
+            else None,
+            file_edit_events=cast(list[dict[str, Any]], file_edit_events)
+            if isinstance(file_edit_events, list)
+            else None,
         )
     return None
 

nanobot/bus/runtime_events.py

@@ -12,12 +12,15 @@ import contextlib
 import inspect
 from collections.abc import Awaitable, Callable
 from dataclasses import dataclass, field
-from typing import Any
+from typing import TYPE_CHECKING, Any
 
 from loguru import logger
 
 from nanobot.bus.events import InboundMessage
 
+if TYPE_CHECKING:
+    from nanobot.utils.llm_runtime import LLMRuntime
+
 
 @dataclass(frozen=True)
 class RuntimeEventContext:
@@ -52,7 +55,7 @@ class TurnCompleted:
 
     context: RuntimeEventContext
     latency_ms: int | None = None
-    runtime: Any | None = None
+    runtime: LLMRuntime | None = None
 
 
 @dataclass(frozen=True)
@@ -155,7 +158,7 @@ class RuntimeEventPublisher:
     def __init__(self, bus: RuntimeEventBus | None = None) -> None:
         self.bus = bus or RuntimeEventBus()
         self._turn_latency_ms: dict[str, int] = {}
-        self._turn_runtime: dict[str, Any] = {}
+        self._turn_runtime: dict[str, LLMRuntime] = {}
 
     @staticmethod
     def _context(
@@ -174,7 +177,7 @@ class RuntimeEventPublisher:
             attributes=dict(attributes or {}),
         )
 
-    def record_turn_runtime(self, session_key: str, runtime: Any) -> None:
+    def record_turn_runtime(self, session_key: str, runtime: LLMRuntime) -> None:
         self._turn_runtime[session_key] = runtime
 
     def record_turn_latency(self, session_key: str, latency_ms: int | None) -> None:

nanobot/channels/base.py

@@ -4,7 +4,7 @@ from __future__ import annotations
 
 from abc import ABC, abstractmethod
 from pathlib import Path
-from typing import Any
+from typing import Any, cast
 
 from loguru import logger
 
@@ -201,13 +201,21 @@ class BaseChannel(ABC):
     def supports_streaming(self) -> bool:
         """True when config enables streaming AND this subclass implements send_delta."""
         cfg = self.config
-        streaming = cfg.get("streaming", False) if isinstance(cfg, dict) else getattr(cfg, "streaming", False)
+        config_mapping = cast(dict[str, Any], cfg) if isinstance(cfg, dict) else None
+        streaming: Any = (
+            config_mapping.get("streaming", False)
+            if config_mapping is not None
+            else getattr(cast(Any, cfg), "streaming", False)
+        )
         return bool(streaming) and type(self).send_delta is not BaseChannel.send_delta
 
     def is_allowed(self, sender_id: str) -> bool:
         """Check sender permission: star > allowlist > pairing store > deny."""
         if isinstance(self.config, dict):
-            allow_list = self.config.get("allow_from") or self.config.get("allowFrom") or []
+            config_mapping = cast(dict[str, Any], self.config)
+            allow_list: Any = (
+                config_mapping.get("allow_from") or config_mapping.get("allowFrom") or []
+            )
         else:
             allow_list = getattr(self.config, "allow_from", None) or []
         if "*" in allow_list:

nanobot/channels/contracts.py

@@ -6,7 +6,7 @@ from collections.abc import Iterable
 from copy import deepcopy
 from dataclasses import dataclass
 from pathlib import Path
-from typing import TYPE_CHECKING, Any, Callable, Literal
+from typing import TYPE_CHECKING, Any, Callable, Literal, TypeGuard, cast
 
 if TYPE_CHECKING:
     from nanobot.channels.plugin import ChannelPlugin
@@ -22,6 +22,8 @@ class ChannelValidationContext:
     allow_local_service_access: bool = False
 
 
+# Keep callback contracts precise for static consumers. The public adapters below
+# still validate third-party implementations at runtime.
 SetupValidator = Callable[[dict[str, Any], ChannelValidationContext], dict[str, Any]]
 DefaultConfigFactory = Callable[[], dict[str, Any]]
 InstanceSpecsFactory = Callable[..., Iterable["ChannelInstanceSpec"]]
@@ -87,7 +89,7 @@ class ChannelActivation:
         instances = (
             tuple(
                 cls.from_config(item, include_instances=True)
-                for item in raw_instances
+                for item in cast(list[Any], raw_instances)
                 if _config_mapping(item) is not None
             )
             if isinstance(raw_instances, list)
@@ -193,7 +195,7 @@ class ChannelSetupSpec:
     def to_public_dict(self, channel_name: str) -> dict[str, Any]:
         """Serialize the writable setup contract for generic WebUI consumers."""
         simple_required = set(self.simple_required_fields)
-        fields = []
+        fields: list[dict[str, Any]] = []
         for name, field in self.fields.items():
             if not field.writable:
                 continue
@@ -268,35 +270,37 @@ def channel_default_config(plugin: ChannelPlugin) -> dict[str, Any]:
     defaults: dict[str, Any] = {"enabled": plugin.default_enabled}
     if plugin.setup is not None:
         for name, field in plugin.setup.fields.items():
-            value = field.default
+            value: Any = field.default
             if value is None:
-                value = {
+                fallback_defaults: dict[str, Any] = {
                     "string": "",
                     "secret": "",
                     "list": [],
                     "bool": False,
-                }.get(field.kind, _MISSING)
+                }
+                value = fallback_defaults.get(field.kind, _MISSING)
             if value is not _MISSING:
                 _assign_channel_field(defaults, name, deepcopy(value))
 
     factory = plugin.management.default_config
     if factory is None:
         return defaults
-    values = factory()
-    if not isinstance(values, dict):
+    values_raw = cast(object, factory())
+    if not isinstance(values_raw, dict):
         raise TypeError(f"ChannelPlugin.management.default_config for '{plugin.name}' must return a dict")
-    return merge_missing_defaults(values, defaults)
+    values = cast(dict[str, Any], values_raw)
+    return cast(dict[str, Any], merge_missing_defaults(values, defaults))
 
 
 def _assign_channel_field(values: dict[str, Any], field: str, value: Any) -> None:
     target = values
     parts = field.split(".")
     for part in parts[:-1]:
-        nested = target.get(part)
+        nested: object = target.get(part)
         if not isinstance(nested, dict):
             nested = {}
             target[part] = nested
-        target = nested
+        target = cast(dict[str, Any], nested)
     target[parts[-1]] = value
 
 
@@ -327,27 +331,28 @@ def channel_instance_specs(
     factory = plugin.management.instance_specs
     if factory is None:
         activation = ChannelActivation.from_config(section)
-        raw_specs: Iterable[ChannelInstanceSpec] = (
+        raw_specs: object = (
             []
             if enabled_only and not activation.resolve(default=plugin.default_enabled)
             else [ChannelInstanceSpec(instance_id="default", config=section)]
         )
     else:
-        raw_specs = factory(section, enabled_only=enabled_only)
+        raw_specs = cast(object, factory(section, enabled_only=enabled_only))
     if not isinstance(raw_specs, Iterable):
         raise TypeError(
             f"ChannelPlugin.management.instance_specs for '{plugin.name}' must return an iterable"
         )
-    specs = list(raw_specs)
+    specs = list(cast(Iterable[object], raw_specs))
+    if not _all_channel_instance_specs(specs):
+        raise TypeError(
+            f"ChannelPlugin.management.instance_specs for '{plugin.name}' returned an invalid item"
+        )
 
     instance_ids: set[str] = set()
     runtime_names: set[str] = set()
     for spec in specs:
-        if not isinstance(spec, ChannelInstanceSpec):
-            raise TypeError(
-                f"ChannelPlugin.management.instance_specs for '{plugin.name}' returned an invalid item"
-            )
-        if not isinstance(spec.instance_id, str) or not spec.instance_id.strip():
+        instance_id = cast(object, spec.instance_id)
+        if not isinstance(instance_id, str) or not instance_id.strip():
             raise ValueError(
                 f"ChannelPlugin.management.instance_specs for '{plugin.name}' returned an empty instance id"
             )
@@ -367,6 +372,12 @@ def channel_instance_specs(
     return specs
 
 
+def _all_channel_instance_specs(
+    values: list[object],
+) -> TypeGuard[list[ChannelInstanceSpec]]:
+    return all(isinstance(value, ChannelInstanceSpec) for value in values)
+
+
 def resolve_channel_action_target(
     requested_instance_id: str | None,
 ) -> str:
@@ -393,8 +404,17 @@ def channel_instance_config(
         return {}
     config = selected.config
     if hasattr(config, "model_dump"):
-        return dict(config.model_dump(mode="json", by_alias=True))
-    return dict(config) if isinstance(config, dict) else {}
+        dumped: dict[str, Any] = config.model_dump(mode="json", by_alias=True)
+        copied: dict[str, Any] = {}
+        for key in dumped:
+            copied[key] = dumped[key]
+        return copied
+    if not isinstance(config, dict):
+        return {}
+    copied_config: dict[str, Any] = {}
+    for key, value in cast(dict[object, Any], config).items():
+        copied_config[cast(str, key)] = value
+    return copied_config
 
 
 def channel_update_instance_config(
@@ -409,7 +429,10 @@ def channel_update_instance_config(
         if instance_id not in {"", "default"}:
             raise ValueError(f"{plugin.name} does not support multiple instances")
         return values
-    return updater(section, values, instance_id=instance_id)
+    updated = cast(object, updater(section, values, instance_id=instance_id))
+    if not isinstance(updated, dict):
+        raise TypeError(f"ChannelPlugin.management.update_instance_config for '{plugin.name}' must return a dict")
+    return cast(dict[str, Any], updated)
 
 
 def channel_set_config_enabled(
@@ -423,7 +446,7 @@ def channel_set_config_enabled(
     from nanobot.config.loader import merge_missing_defaults
 
     values = channel_instance_config(plugin, section, instance_id=instance_id)
-    values = merge_missing_defaults(values, channel_default_config(plugin))
+    values = cast(dict[str, Any], merge_missing_defaults(values, channel_default_config(plugin)))
     values["enabled"] = enabled
     return channel_update_instance_config(
         plugin,
@@ -440,12 +463,16 @@ def channel_feature_instances(
     setup_spec: ChannelSetupSpec | None = None,
 ) -> list[dict[str, Any]] | None:
     factory = plugin.management.feature_instances
-    overrides = factory(section, setup_spec=setup_spec) if factory is not None else None
+    overrides = (
+        cast(object, factory(section, setup_spec=setup_spec))
+        if factory is not None
+        else None
+    )
     if overrides is None and not plugin.management.multi_instance:
         return None
     if overrides is not None and (
         not isinstance(overrides, list)
-        or any(not isinstance(instance, dict) for instance in overrides)
+        or any(not isinstance(instance, dict) for instance in cast(list[object], overrides))
     ):
         raise TypeError(
             f"ChannelPlugin.management.feature_instances for '{plugin.name}' "
@@ -470,7 +497,8 @@ def channel_feature_instances(
 
     by_id = {instance["id"]: instance for instance in instances}
     seen: set[str] = set()
-    for override in overrides:
+    for override_value in cast(list[object], overrides):
+        override = cast(dict[str, Any], override_value)
         instance_id = override.get("id")
         if not isinstance(instance_id, str) or instance_id not in by_id:
             raise ValueError(
@@ -514,20 +542,21 @@ def _validate_runtime_name(plugin: ChannelPlugin, runtime_name: Any) -> None:
 
 
 def channel_field_value(values: Any, field_path: str) -> Any:
-    current = values
+    current: Any = values
     for part in field_path.split("."):
         candidates = (part, _camel_to_snake(part))
         if isinstance(current, dict):
             for candidate in candidates:
                 if candidate in current:
-                    current = current[candidate]
+                    current = cast(Any, current)[candidate]
                     break
             else:
                 return None
             continue
         for candidate in candidates:
-            if hasattr(current, candidate):
-                current = getattr(current, candidate)
+            current_value = current
+            if hasattr(current_value, candidate):
+                current = getattr(current_value, candidate)
                 break
         else:
             return None
@@ -542,7 +571,7 @@ def stringify_channel_value(value: Any) -> str:
     if isinstance(value, bool):
         return "true" if value else "false"
     if isinstance(value, list):
-        return ", ".join(str(item) for item in value)
+        return ", ".join(str(item) for item in cast(list[Any], value))
     return str(value)
 
 
@@ -586,8 +615,8 @@ def _channel_feature_instance(
 def _config_mapping(value: Any) -> dict[str, Any] | None:
     if hasattr(value, "model_dump"):
         dumped = value.model_dump(mode="json", by_alias=True)
-        return dumped if isinstance(dumped, dict) else None
-    return value if isinstance(value, dict) else None
+        return cast(dict[str, Any], dumped) if isinstance(dumped, dict) else None
+    return cast(dict[str, Any], value) if isinstance(value, dict) else None
 
 
 def _camel_to_snake(value: str) -> str:

nanobot/channels/dingtalk/runtime.py

@@ -1,3 +1,4 @@
+# pyright: reportConstantRedefinition=false, reportMissingTypeStubs=false, reportPrivateUsage=false
 """DingTalk/DingDing channel implementation using Stream Mode."""
 
 import asyncio
@@ -10,7 +11,7 @@ from contextlib import suppress
 from inspect import isawaitable
 from io import BytesIO
 from pathlib import Path
-from typing import Any
+from typing import Any, cast
 from urllib.parse import unquote, urljoin, urlparse
 
 import httpx
@@ -36,11 +37,17 @@ def _escape_markdown_sender_name(value: str) -> str:
         for char in normalized
     )
 
+DINGTALK_AVAILABLE = False
+AckMessage: Any = None
+CallbackHandler: Any = object
+Credential: Any = None
+DingTalkStreamClient: Any = None
+ChatbotMessage: Any = None
+
 try:
     from dingtalk_stream import (
         AckMessage,
         CallbackHandler,
-        CallbackMessage,
         Credential,
         DingTalkStreamClient,
     )
@@ -48,41 +55,41 @@ try:
 
     DINGTALK_AVAILABLE = True
 except ImportError:
-    DINGTALK_AVAILABLE = False
-    # Fallback so class definitions don't crash at module level
-    CallbackHandler = object  # type: ignore[assignment,misc]
-    CallbackMessage = None  # type: ignore[assignment,misc]
-    AckMessage = None  # type: ignore[assignment,misc]
-    ChatbotMessage = None  # type: ignore[assignment,misc]
+    pass
 
 
-class NanobotDingTalkHandler(CallbackHandler):
+_CallbackHandlerBase = CallbackHandler
+
+
+class NanobotDingTalkHandler(_CallbackHandlerBase):
     """
     Standard DingTalk Stream SDK Callback Handler.
     Parses incoming messages and forwards them to the Nanobot channel.
     """
 
     def __init__(self, channel: "DingTalkChannel"):
-        super().__init__()
+        super().__init__()  # pyright: ignore[reportUnknownMemberType]
         self.channel = channel
 
-    async def process(self, message: CallbackMessage):
+    async def process(self, message: Any) -> tuple[Any, str]:
         """Process incoming stream message."""
         try:
             # Parse using SDK's ChatbotMessage for robust handling
-            chatbot_msg = ChatbotMessage.from_dict(message.data)
+            chatbot_msg: Any = ChatbotMessage.from_dict(message.data)
+            message_data = cast(dict[str, Any], message.data)
 
             # Extract text content; fall back to raw dict if SDK object is empty
             content = ""
             if chatbot_msg.text:
-                content = chatbot_msg.text.content.strip()
+                content = cast(str, chatbot_msg.text.content).strip()
             elif chatbot_msg.extensions.get("content", {}).get("recognition"):
-                content = chatbot_msg.extensions["content"]["recognition"].strip()
+                content = cast(str, chatbot_msg.extensions["content"]["recognition"]).strip()
             if not content:
-                content = message.data.get("text", {}).get("content", "").strip()
+                text_data = cast(dict[str, Any], message_data.get("text", {}))
+                content = cast(str, text_data.get("content", "")).strip()
 
             # Handle file/image messages
-            file_paths = []
+            file_paths: list[str] = []
             if chatbot_msg.message_type == "picture" and chatbot_msg.image_content:
                 download_code = chatbot_msg.image_content.download_code
                 if download_code:
@@ -93,8 +100,18 @@ class NanobotDingTalkHandler(CallbackHandler):
                         content = content or "[Image]"
 
             elif chatbot_msg.message_type == "file":
-                download_code = message.data.get("content", {}).get("downloadCode") or message.data.get("downloadCode")
-                fname = message.data.get("content", {}).get("fileName") or message.data.get("fileName") or "file"
+                message_content = cast(dict[str, Any], message_data.get("content", {}))
+                download_code = cast(
+                    str,
+                    message_content.get("downloadCode")
+                    or message_data.get("downloadCode"),
+                )
+                fname = cast(
+                    str,
+                    message_content.get("fileName")
+                    or message_data.get("fileName")
+                    or "file",
+                )
                 if download_code:
                     sender_uid = chatbot_msg.sender_staff_id or chatbot_msg.sender_id or "unknown"
                     fp = await self.channel._download_dingtalk_file(download_code, fname, sender_uid)
@@ -103,13 +120,17 @@ class NanobotDingTalkHandler(CallbackHandler):
                         content = content or "[File]"
 
             elif chatbot_msg.message_type == "richText" and chatbot_msg.rich_text_content:
-                rich_list = chatbot_msg.rich_text_content.rich_text_list or []
-                for item in rich_list:
-                    if not isinstance(item, dict):
+                rich_list = cast(
+                    list[object],
+                    chatbot_msg.rich_text_content.rich_text_list or [],
+                )
+                for item_value in rich_list:
+                    if not isinstance(item_value, dict):
                         continue
+                    item = cast(dict[str, Any], item_value)
                     # A rich-text item may carry text and/or a downloadCode; the
                     # DingTalk SDK treats them independently, so handle both.
-                    t = item.get("text", "").strip()
+                    t = cast(str, item.get("text", "")).strip()
                     if t:
                         fmt = item.get("type", "")
                         if fmt == "bold":
@@ -124,8 +145,8 @@ class NanobotDingTalkHandler(CallbackHandler):
                             formatted = t
                         content = (content + " " + formatted).strip() if content else formatted
                     if item.get("downloadCode"):
-                        dc = item["downloadCode"]
-                        fname = item.get("fileName") or "file"
+                        dc = cast(str, item["downloadCode"])
+                        fname = cast(str, item.get("fileName") or "file")
                         sender_uid = chatbot_msg.sender_staff_id or chatbot_msg.sender_id or "unknown"
                         fp = await self.channel._download_dingtalk_file(dc, fname, sender_uid)
                         if fp:
@@ -143,13 +164,22 @@ class NanobotDingTalkHandler(CallbackHandler):
                 )
                 return AckMessage.STATUS_OK, "OK"
 
-            sender_id = chatbot_msg.sender_staff_id or chatbot_msg.sender_id
-            sender_name = chatbot_msg.sender_nick or "Unknown"
+            sender_id = cast(
+                str | None,
+                chatbot_msg.sender_staff_id or chatbot_msg.sender_id,
+            )
+            sender_name = cast(str, chatbot_msg.sender_nick or "Unknown")
 
-            conversation_type = message.data.get("conversationType")
+            conversation_type = cast(
+                str | None,
+                message_data.get("conversationType"),
+            )
             conversation_id = (
-                message.data.get("conversationId")
-                or message.data.get("openConversationId")
+                cast(
+                    str | None,
+                    message_data.get("conversationId")
+                    or message_data.get("openConversationId"),
+                )
             )
 
             self.channel.logger.info("Received message from {} ({}): {}", sender_name, sender_id, content)
@@ -218,14 +248,14 @@ class DingTalkChannel(BaseChannel):
         self.config: DingTalkConfig = config
         self._client: Any = None
         self._http: httpx.AsyncClient | None = None
-        self._start_task: asyncio.Task | None = None
+        self._start_task: asyncio.Task[Any] | None = None
 
         # Access Token management for sending messages
         self._access_token: str | None = None
         self._token_expiry: float = 0
 
         # Hold references to background tasks to prevent GC
-        self._background_tasks: set[asyncio.Task] = set()
+        self._background_tasks: set[asyncio.Task[None]] = set()
 
     async def start(self) -> None:
         """Start the DingTalk bot with Stream Mode."""
@@ -575,7 +605,11 @@ class DingTalkChannel(BaseChannel):
         try:
             resp = await self._http.post(url, files=files)
             text = resp.text
-            result = resp.json() if resp.headers.get("content-type", "").startswith("application/json") else {}
+            result = (
+                cast(dict[str, Any], resp.json())
+                if resp.headers.get("content-type", "").startswith("application/json")
+                else {}
+            )
             if resp.status_code >= 400:
                 self.logger.error("media upload failed status={} type={} body={}", resp.status_code, media_type, text[:500])
                 return None
@@ -583,7 +617,7 @@ class DingTalkChannel(BaseChannel):
             if errcode != 0:
                 self.logger.error("media upload api error type={} errcode={} body={}", media_type, errcode, text[:500])
                 return None
-            sub = result.get("result") or {}
+            sub = cast(dict[str, Any], result.get("result") or {})
             media_id = result.get("media_id") or result.get("mediaId") or sub.get("media_id") or sub.get("mediaId")
             if not media_id:
                 self.logger.error("media upload missing media_id body={}", text[:500])
@@ -634,7 +668,7 @@ class DingTalkChannel(BaseChannel):
                 self.logger.error("send failed msgKey={} status={} body={}", msg_key, resp.status_code, body[:500])
                 return False
             try:
-                result = resp.json()
+                result = cast(dict[str, Any], resp.json())
             except Exception:
                 result = {}
             errcode = result.get("errcode")

nanobot/channels/discord/runtime.py

@@ -1,4 +1,5 @@
 """Discord channel implementation using discord.py."""
+# pyright: reportPrivateUsage=false, reportUnusedFunction=false
 
 from __future__ import annotations
 
@@ -8,7 +9,7 @@ import time
 from contextlib import suppress
 from dataclasses import dataclass
 from pathlib import Path
-from typing import TYPE_CHECKING, Any, Literal
+from typing import TYPE_CHECKING, Any, Literal, cast
 
 from pydantic import Field
 
@@ -43,7 +44,7 @@ class _StreamBuf:
     """Per-chat streaming accumulator for progressive Discord message edits."""
 
     text: str = ""
-    message: Any | None = None
+    message: discord.Message | None = None
     last_edit: float = 0.0
     stream_id: str | None = None
 
@@ -266,13 +267,14 @@ if DISCORD_AVAILABLE:
                     self._channel.logger.warning("channel {} unavailable: {}", msg.chat_id, e)
                     raise
 
-            reference, mention_settings = self._build_reply_context(channel, msg.reply_to)
+            messageable_channel = cast(Messageable, channel)
+            reference, mention_settings = self._build_reply_context(messageable_channel, msg.reply_to)
             sent_media = False
             failed_media: list[str] = []
 
             for index, media_path in enumerate(msg.media or []):
                 if await self._send_file(
-                    channel,
+                    messageable_channel,
                     media_path,
                     reference=reference if index == 0 else None,
                     mention_settings=mention_settings,
@@ -288,7 +290,7 @@ if DISCORD_AVAILABLE:
                 if index == 0 and reference is not None and not sent_media:
                     kwargs["reference"] = reference
                     kwargs["allowed_mentions"] = mention_settings
-                await channel.send(**kwargs)
+                await messageable_channel.send(**kwargs)
 
         async def _send_file(
             self,
@@ -344,7 +346,7 @@ if DISCORD_AVAILABLE:
                 self._channel.logger.warning("Invalid reply target: {}", reply_to)
                 return None, mention_settings
 
-            return channel.get_partial_message(message_id), mention_settings
+            return cast(Any, channel).get_partial_message(message_id), mention_settings
 
 
 class DiscordChannel(BaseChannel):
@@ -423,8 +425,8 @@ class DiscordChannel(BaseChannel):
                 import aiohttp
 
                 proxy_auth = aiohttp.BasicAuth(
-                    login=self.config.proxy_username,
-                    password=self.config.proxy_password,
+                    login=cast(str, self.config.proxy_username),
+                    password=cast(str, self.config.proxy_password),
                 )
             elif has_user != has_pass:
                 self.logger.warning(
@@ -507,7 +509,7 @@ class DiscordChannel(BaseChannel):
                 return
             if stream_id is not None and buf.stream_id is not None and buf.stream_id != stream_id:
                 return
-            await self._finalize_stream(chat_id, buf)
+            await self._finalize_stream(chat_id, buf, buf.message)
             return
 
         buf = self._stream_bufs.get(chat_id)
@@ -635,7 +637,12 @@ class DiscordChannel(BaseChannel):
             self.logger.warning("channel {} unavailable: {}", chat_id, e)
             return None
 
-    async def _finalize_stream(self, chat_id: str, buf: _StreamBuf) -> None:
+    async def _finalize_stream(
+        self,
+        chat_id: str,
+        buf: _StreamBuf,
+        message: discord.Message,
+    ) -> None:
         """Commit the final streamed content and flush overflow chunks."""
         chunks = DiscordBotClient._build_chunks(buf.text, [], False)
         if not chunks:
@@ -643,16 +650,12 @@ class DiscordChannel(BaseChannel):
             return
 
         try:
-            await buf.message.edit(content=chunks[0])
+            await message.edit(content=chunks[0])
         except Exception as e:
             self.logger.warning("final stream edit failed: {}", e)
             raise
 
-        target = getattr(buf.message, "channel", None) or await self._resolve_channel(chat_id)
-        if target is None:
-            self.logger.warning("stream follow-up target {} unavailable", chat_id)
-            self._stream_bufs.pop(chat_id, None)
-            return
+        target = message.channel
 
         for extra_chunk in chunks[1:]:
             await target.send(content=extra_chunk)

nanobot/channels/email/runtime.py

@@ -17,7 +17,7 @@ from email.parser import BytesParser
 from email.utils import parseaddr
 from fnmatch import fnmatch
 from pathlib import Path
-from typing import Any, Literal
+from typing import Any, Literal, cast
 
 from loguru import logger
 from pydantic import Field
@@ -188,7 +188,9 @@ class EmailChannel(BaseChannel):
                         self.logger.exception("Error delivering email from {}", sender)
                         continue
 
-                    uid = str((item.get("metadata") or {}).get("uid") or "")
+                    metadata = item.get("metadata")
+                    metadata_data = cast(dict[str, Any], metadata) if isinstance(metadata, dict) else {}
+                    uid = str(metadata_data.get("uid") or "")
                     if uid and should_apply_post_action:
                         post_actions_uids.add(uid)
 
@@ -312,7 +314,7 @@ class EmailChannel(BaseChannel):
             raise
 
     def _validate_config(self) -> bool:
-        missing = []
+        missing: list[str] = []
         if not self.config.imap_host:
             missing.append("imap_host")
         if not self.config.imap_username:
@@ -427,7 +429,7 @@ class EmailChannel(BaseChannel):
         messages: list[dict[str, Any]],
         skipped_uids: set[str],
         cycle_uids: set[str],
-    ) -> None:
+    ) -> list[dict[str, Any]] | None:
         """Fetch messages by arbitrary IMAP search criteria."""
         mailbox = self.config.imap_mailbox or "INBOX"
 
@@ -765,8 +767,10 @@ class EmailChannel(BaseChannel):
     @staticmethod
     def _extract_message_bytes(fetched: list[Any]) -> bytes | None:
         for item in fetched:
-            if isinstance(item, tuple) and len(item) >= 2 and isinstance(item[1], (bytes, bytearray)):
-                return bytes(item[1])
+            if isinstance(item, tuple):
+                fetched_item = cast(tuple[Any, ...], item)
+                if len(fetched_item) >= 2 and isinstance(fetched_item[1], (bytes, bytearray)):
+                    return bytes(fetched_item[1])
         return None
 
     @staticmethod
@@ -837,8 +841,8 @@ class EmailChannel(BaseChannel):
         """
         spf_pass = False
         dkim_pass = False
-        for ar_header in parsed_msg.get_all("Authentication-Results") or []:
-            ar_lower = ar_header.lower()
+        for ar_header in cast(list[Any], parsed_msg.get_all("Authentication-Results") or []):
+            ar_lower = str(ar_header).lower()
             if re.search(r"\bspf\s*=\s*pass\b", ar_lower):
                 spf_pass = True
             if re.search(r"\bdkim\s*=\s*pass\b", ar_lower):

nanobot/channels/feishu/connect.py

@@ -1,5 +1,7 @@
 """Short-lived WebUI channel connection sessions."""
 
+# pyright: reportPrivateUsage=false
+
 from __future__ import annotations
 
 import asyncio

nanobot/channels/feishu/instances.py

@@ -3,7 +3,7 @@
 from __future__ import annotations
 
 import re
-from typing import Any
+from typing import Any, cast
 
 from loguru import logger
 
@@ -46,7 +46,7 @@ def update_managed_feishu_instance(
     *,
     instance_id: str = DEFAULT_INSTANCE_ID,
 ) -> dict[str, Any]:
-    existing = section if isinstance(section, dict) else {}
+    existing = cast(dict[str, Any], section) if isinstance(section, dict) else {}
     return upsert_feishu_instance(
         existing,
         feishu_default_config(),
@@ -69,8 +69,8 @@ def _normalize_feishu_instance(
     inherited: dict[str, Any] | None = None,
     fallback_id: str = DEFAULT_INSTANCE_ID,
 ) -> dict[str, Any]:
-    config = merge_missing_defaults(inherited or {}, defaults)
-    config = merge_missing_defaults(raw, config)
+    config = cast(dict[str, Any], merge_missing_defaults(inherited or {}, defaults))
+    config = cast(dict[str, Any], merge_missing_defaults(raw, config))
 
     raw_id = raw.get("id") or raw.get("instanceId") or raw.get("instance_id") or fallback_id
     instance_id = validate_instance_id(str(raw_id))
@@ -97,12 +97,13 @@ def _feishu_instance_inputs(
         section = section.model_dump(mode="json", by_alias=True)
     if not isinstance(section, dict):
         section = {}
+    section_data = cast(dict[str, Any], section)
 
-    instances = section.get("instances")
+    instances = section_data.get("instances")
     if isinstance(instances, list):
-        inherited = {key: value for key, value in section.items() if key != "instances"}
-        return list(instances), inherited
-    return ([section] if section else [_base_feishu_instance_config(defaults)]), None
+        inherited = {key: value for key, value in section_data.items() if key != "instances"}
+        return list(cast(list[Any], instances)), inherited
+    return ([section_data] if section_data else [_base_feishu_instance_config(defaults)]), None
 
 
 def feishu_instance_specs(
@@ -124,7 +125,7 @@ def feishu_instance_specs(
         fallback_id = DEFAULT_INSTANCE_ID if index == 0 else f"assistant-{index + 1}"
         try:
             config = _normalize_feishu_instance(
-                raw,
+                cast(dict[str, Any], raw),
                 defaults,
                 inherited=inherited,
                 fallback_id=fallback_id,
@@ -179,7 +180,7 @@ def canonical_feishu_section(section: Any, defaults: dict[str, Any]) -> dict[str
         fallback_id = DEFAULT_INSTANCE_ID if index == 0 else f"assistant-{index + 1}"
         try:
             config = _normalize_feishu_instance(
-                raw,
+                cast(dict[str, Any], raw),
                 defaults,
                 inherited=inherited,
                 fallback_id=fallback_id,
@@ -238,9 +239,9 @@ def update_feishu_instance_preserving_shape(
     if (
         instance_id == DEFAULT_INSTANCE_ID
         and isinstance(section, dict)
-        and not isinstance(section.get("instances"), list)
+        and not isinstance(cast(dict[str, Any], section).get("instances"), list)
     ):
-        return {**section, **values}
+        return {**cast(dict[str, Any], section), **values}
 
     return upsert_feishu_instance(section, defaults, instance_id, values)
 

nanobot/channels/feishu/runtime.py

@@ -1,4 +1,5 @@
 """Feishu/Lark channel implementation using lark-oapi SDK with WebSocket long connection."""
+# pyright: reportMissingModuleSource=false, reportMissingTypeStubs=false
 
 from __future__ import annotations
 
@@ -14,8 +15,9 @@ from collections import OrderedDict
 from contextlib import suppress
 from dataclasses import dataclass
 from datetime import UTC, datetime
+from functools import partial
 from pathlib import Path
-from typing import TYPE_CHECKING, Any
+from typing import TYPE_CHECKING, Any, TypedDict, cast
 
 from rich.console import Console
 from rich.markup import escape
@@ -44,7 +46,10 @@ from nanobot.utils.helpers import safe_filename
 from nanobot.utils.logging_bridge import redirect_lib_logging
 
 if TYPE_CHECKING:
-    from lark_oapi.api.im.v1.model import MentionEvent, P2ImMessageReceiveV1
+    from lark_oapi.api.im.v1.model import (  # pyright: ignore[reportMissingTypeStubs]
+        MentionEvent,
+        P2ImMessageReceiveV1,
+    )
 
 FEISHU_AVAILABLE = importlib.util.find_spec("lark_oapi") is not None
 _LOGIN_CONSOLE = Console()
@@ -55,6 +60,20 @@ def _identity_timestamp() -> str:
     return datetime.now(UTC).isoformat(timespec="seconds").replace("+00:00", "Z")
 
 
+def _as_json_object(value: Any) -> dict[str, Any] | None:
+    """Narrow untyped SDK/JSON objects at the channel boundary."""
+    return cast(dict[str, Any], value) if isinstance(value, dict) else None
+
+
+def _as_json_list(value: Any) -> list[Any] | None:
+    """Narrow untyped SDK/JSON arrays at the channel boundary."""
+    return cast(list[Any], value) if isinstance(value, list) else None
+
+
+def _ignore_event(_: Any) -> None:
+    """Consume SDK events that intentionally have no channel action."""
+
+
 def _load_lark_runtime() -> tuple[Any, str, str]:
     """Import the heavy Feishu SDK lazily.
 
@@ -69,9 +88,12 @@ def _load_lark_runtime() -> tuple[Any, str, str]:
     # close the same loop.
     with _LARK_RUNTIME_LOCK:
         ws_client_already_imported = "lark_oapi.ws.client" in sys.modules
-        import lark_oapi as lark
-        import lark_oapi.ws.client as lark_ws_client
-        from lark_oapi.core.const import FEISHU_DOMAIN, LARK_DOMAIN
+        import lark_oapi as lark  # pyright: ignore[reportMissingTypeStubs]
+        import lark_oapi.ws.client as lark_ws_client  # pyright: ignore[reportMissingTypeStubs]
+        from lark_oapi.core.const import (  # pyright: ignore[reportMissingTypeStubs]
+            FEISHU_DOMAIN,
+            LARK_DOMAIN,
+        )
 
         if (
             not ws_client_already_imported
@@ -106,7 +128,7 @@ def fetch_feishu_app_identity(
 
     try:
         lark, feishu_domain, lark_domain = _load_lark_runtime()
-        from lark_oapi.api.application.v6.model.get_application_request import (
+        from lark_oapi.api.application.v6.model.get_application_request import (  # pyright: ignore[reportMissingTypeStubs]
             GetApplicationRequest,
         )
 
@@ -151,9 +173,9 @@ MSG_TYPE_MAP = {
 }
 
 
-def _extract_share_card_content(content_json: dict, msg_type: str) -> str:
+def _extract_share_card_content(content_json: dict[str, Any], msg_type: str) -> str:
     """Extract text representation from share cards and interactive messages."""
-    parts = []
+    parts: list[str] = []
 
     if msg_type == "share_chat":
         parts.append(f"[shared chat: {content_json.get('chat_id', '')}]")
@@ -171,9 +193,9 @@ def _extract_share_card_content(content_json: dict, msg_type: str) -> str:
     return "\n".join(parts) if parts else f"[{msg_type}]"
 
 
-def _extract_interactive_content(content: dict) -> list[str]:
+def _extract_interactive_content(content: str | dict[str, Any]) -> list[str]:
     """Recursively extract text and links from interactive card content."""
-    parts = []
+    parts: list[str] = []
 
     if isinstance(content, str):
         try:
@@ -189,8 +211,9 @@ def _extract_interactive_content(content: dict) -> list[str]:
     if isinstance(user_dsl, str) and user_dsl.strip():
         try:
             dsl = json.loads(user_dsl)
-            if isinstance(dsl, dict):
-                parts.extend(_extract_interactive_content(dsl))
+            dsl_object = _as_json_object(dsl)
+            if dsl_object is not None:
+                parts.extend(_extract_interactive_content(dsl_object))
                 if parts:
                     return parts
         except (json.JSONDecodeError, TypeError):
@@ -198,8 +221,9 @@ def _extract_interactive_content(content: dict) -> list[str]:
 
     if "title" in content:
         title = content["title"]
-        if isinstance(title, dict):
-            title_content = title.get("content", "") or title.get("text", "")
+        title_object = _as_json_object(title)
+        if title_object is not None:
+            title_content = title_object.get("content", "") or title_object.get("text", "")
             if title_content:
                 parts.append(f"title: {title_content}")
         elif isinstance(title, str):
@@ -207,34 +231,39 @@ def _extract_interactive_content(content: dict) -> list[str]:
 
     # Top-level elements: flat list or nested list format
     elements = content.get("elements")
-    if isinstance(elements, list):
-        if elements and isinstance(elements[0], list):
+    elements_list = _as_json_list(elements)
+    if elements_list is not None:
+        if elements_list and isinstance(elements_list[0], list):
             # Nested list: [[{tag:"text",text:"..."}], ...]
-            for row in elements:
-                if isinstance(row, list):
-                    for element in row:
+            for row in elements_list:
+                row_list = _as_json_list(row)
+                if row_list is not None:
+                    for element in row_list:
                         parts.extend(_extract_element_content(element))
         else:
             # Flat list: [{tag:"markdown",content:"..."}, ...]
-            for element in elements:
+            for element in elements_list:
                 parts.extend(_extract_element_content(element))
 
     # Body elements (schema 2.0)
     body = content.get("body", {})
-    if isinstance(body, dict):
-        body_elements = body.get("elements")
-        if isinstance(body_elements, list):
+    body_object = _as_json_object(body)
+    if body_object is not None:
+        body_elements = _as_json_list(body_object.get("elements"))
+        if body_elements is not None:
             for element in body_elements:
                 parts.extend(_extract_element_content(element))
 
     card = content.get("card", {})
-    if card:
-        parts.extend(_extract_interactive_content(card))
+    card_object = _as_json_object(card)
+    if card_object:
+        parts.extend(_extract_interactive_content(card_object))
 
     header = content.get("header", {})
-    if header:
-        header_title = header.get("title", {})
-        if isinstance(header_title, dict):
+    header_object = _as_json_object(header)
+    if header_object is not None:
+        header_title = _as_json_object(header_object.get("title", {}))
+        if header_title is not None:
             header_text = header_title.get("content", "") or header_title.get("text", "")
             if header_text:
                 parts.append(f"title: {header_text}")
@@ -242,13 +271,16 @@ def _extract_interactive_content(content: dict) -> list[str]:
     return parts
 
 
-def _extract_element_content(element: dict) -> list[str]:
+def _extract_element_content(element: Any) -> list[str]:
     """Extract content from a single card element."""
-    parts = []
+    parts: list[str] = []
 
-    if not isinstance(element, dict):
+    element_object = _as_json_object(element)
+    if element_object is None:
         return parts
 
+    element = element_object
+
     tag = element.get("tag", "")
 
     if tag in ("markdown", "lark_md"):
@@ -263,16 +295,18 @@ def _extract_element_content(element: dict) -> list[str]:
 
     elif tag == "div":
         text = element.get("text", {})
-        if isinstance(text, dict):
-            text_content = text.get("content", "") or text.get("text", "")
+        text_object = _as_json_object(text)
+        if text_object is not None:
+            text_content = text_object.get("content", "") or text_object.get("text", "")
             if text_content:
                 parts.append(text_content)
         elif isinstance(text, str):
             parts.append(text)
-        for field in element.get("fields") or []:
-            if isinstance(field, dict):
-                field_text = field.get("text", {})
-                if isinstance(field_text, dict):
+        for field in _as_json_list(element.get("fields")) or []:
+            field_object = _as_json_object(field)
+            if field_object is not None:
+                field_text = _as_json_object(field_object.get("text", {}))
+                if field_text is not None:
                     c = field_text.get("content", "")
                     if c:
                         parts.append(c)
@@ -287,30 +321,33 @@ def _extract_element_content(element: dict) -> list[str]:
 
     elif tag == "button":
         text = element.get("text", {})
-        if isinstance(text, dict):
-            c = text.get("content", "")
+        text_object = _as_json_object(text)
+        if text_object is not None:
+            c = text_object.get("content", "")
             if c:
                 parts.append(c)
-        multi_url = element.get("multi_url") or {}
+        multi_url: Any = element.get("multi_url") or {}
+        multi_url_object = _as_json_object(multi_url)
         url = element.get("url", "") or (
-            multi_url.get("url", "") if isinstance(multi_url, dict) else ""
+            multi_url_object.get("url", "") if multi_url_object is not None else ""
         )
         if url:
             parts.append(f"link: {url}")
 
     elif tag == "img":
-        alt = element.get("alt", {})
-        parts.append(alt.get("content", "[image]") if isinstance(alt, dict) else "[image]")
+        alt = _as_json_object(element.get("alt", {}))
+        parts.append(alt.get("content", "[image]") if alt is not None else "[image]")
 
     elif tag == "note":
-        for ne in element.get("elements") or []:
+        for ne in _as_json_list(element.get("elements")) or []:
             parts.extend(_extract_element_content(ne))
 
     elif tag == "column_set":
-        for col in element.get("columns") or []:
-            if not isinstance(col, dict):
+        for col in _as_json_list(element.get("columns")) or []:
+            col_object = _as_json_object(col)
+            if col_object is None:
                 continue
-            for ce in col.get("elements") or []:
+            for ce in _as_json_list(col_object.get("elements")) or []:
                 parts.extend(_extract_element_content(ce))
 
     elif tag == "plain_text":
@@ -319,36 +356,44 @@ def _extract_element_content(element: dict) -> list[str]:
             parts.append(content)
 
     elif tag == "table":
-        columns = [
-            (column["name"], str(column.get("display_name") or column["name"]))
-            for column in (element.get("columns") or [])
-            if isinstance(column, dict) and column.get("name")
-        ]
-        rows = element.get("rows") or []
+        columns: list[tuple[str, str]] = []
+        for column in _as_json_list(element.get("columns")) or []:
+            column_object = _as_json_object(column)
+            if column_object is None:
+                continue
+            name = column_object.get("name")
+            if isinstance(name, str) and name:
+                columns.append((name, str(column_object.get("display_name") or name)))
+        rows = _as_json_list(element.get("rows")) or []
         if columns:
             parts.append(" | ".join(header for _, header in columns))
-        if isinstance(rows, list):
+        if rows:
             for row in rows:
-                if not isinstance(row, dict):
+                row_object = _as_json_object(row)
+                if row_object is None:
                     continue
-                values = []
+                values: list[str] = []
                 for name, _ in columns:
-                    value = row.get(name)
+                    value = row_object.get(name)
                     if isinstance(value, list):
-                        value = " ".join(str(item).strip() for item in value if item is not None)
+                        value = " ".join(
+                            str(item).strip()
+                            for item in cast(list[Any], value)
+                            if item is not None
+                        )
                     values.append("" if value is None else str(value).strip())
                 row_text = " | ".join(values).strip()
                 if row_text:
                     parts.append(row_text)
 
     else:
-        for ne in element.get("elements") or []:
+        for ne in _as_json_list(element.get("elements")) or []:
             parts.extend(_extract_element_content(ne))
 
     return parts
 
 
-def _extract_post_content(content_json: dict) -> tuple[str, list[str]]:
+def _extract_post_content(content_json: dict[str, Any]) -> tuple[str, list[str]]:
     """Extract text and image keys from Feishu post (rich text) message.
 
     Handles three payload shapes:
@@ -357,45 +402,48 @@ def _extract_post_content(content_json: dict) -> tuple[str, list[str]]:
     - Wrapped:   {"post": {"zh_cn": {"title": "...", "content": [...]}}}
     """
 
-    def _parse_block(block: dict) -> tuple[str | None, list[str]]:
-        if not isinstance(block, dict) or not isinstance(block.get("content"), list):
+    def _parse_block(block: dict[str, Any]) -> tuple[str | None, list[str]]:
+        content = _as_json_list(block.get("content"))
+        if content is None:
             return None, []
-        texts, images = [], []
+        texts: list[str] = []
+        images: list[str] = []
         title = block.get("title")
         if isinstance(title, str) and title:
             texts.append(title)
-        for row in block["content"]:
-            if not isinstance(row, list):
+        for row in content:
+            row_items = _as_json_list(row)
+            if row_items is None:
                 continue
-            for el in row:
-                if not isinstance(el, dict):
+            for el in row_items:
+                element = _as_json_object(el)
+                if element is None:
                     continue
-                tag = el.get("tag")
+                tag = element.get("tag")
                 if tag in ("text", "a"):
-                    text = el.get("text", "")
+                    text = element.get("text", "")
                     if isinstance(text, str):
                         texts.append(text)
                 elif tag == "at":
-                    user = el.get("user_name", "user")
+                    user = element.get("user_name", "user")
                     texts.append(f"@{user if isinstance(user, str) and user else 'user'}")
                 elif tag == "code_block":
-                    lang = el.get("language", "")
-                    code_text = el.get("text", "")
+                    lang = element.get("language", "")
+                    code_text = element.get("text", "")
                     if not isinstance(lang, str):
                         lang = ""
                     if not isinstance(code_text, str):
                         code_text = ""
                     texts.append(f"\n```{lang}\n{code_text}\n```\n")
-                elif tag == "img" and (key := el.get("image_key")):
+                elif tag == "img" and isinstance((key := element.get("image_key")), str):
                     images.append(key)
         return (" ".join(texts).strip() or None), images
 
     # Unwrap optional {"post": ...} envelope
     root = content_json
-    if isinstance(root, dict) and isinstance(root.get("post"), dict):
-        root = root["post"]
-    if not isinstance(root, dict):
-        return "", []
+    post = _as_json_object(root.get("post"))
+    if post is not None:
+        root = post
 
     # Direct format
     if "content" in root:
@@ -406,19 +454,23 @@ def _extract_post_content(content_json: dict) -> tuple[str, list[str]]:
     # Localized: prefer known locales, then fall back to any dict child
     for key in ("zh_cn", "en_us", "ja_jp"):
         if key in root:
-            text, imgs = _parse_block(root[key])
+            block = _as_json_object(root[key])
+            if block is None:
+                continue
+            text, imgs = _parse_block(block)
             if text or imgs:
                 return text or "", imgs
     for val in root.values():
-        if isinstance(val, dict):
-            text, imgs = _parse_block(val)
+        block = _as_json_object(val)
+        if block is not None:
+            text, imgs = _parse_block(block)
             if text or imgs:
                 return text or "", imgs
 
     return "", []
 
 
-def _extract_post_text(content_json: dict) -> str:
+def _extract_post_text(content_json: dict[str, Any]) -> str:  # pyright: ignore[reportUnusedFunction]
     """Extract plain text from Feishu post (rich text) message content.
 
     Legacy wrapper for _extract_post_content, returns only text.
@@ -442,11 +494,18 @@ _REGISTRATION_PATH = "/oauth/v1/app/registration"
 _ONBOARD_REQUEST_TIMEOUT_S = 10
 
 
+class _RegistrationStart(TypedDict):
+    device_code: str
+    qr_url: str
+    interval: int
+    expire_in: int
+
+
 def _accounts_base_url(domain: str) -> str:
     return _ONBOARD_ACCOUNTS_URLS.get(domain, _ONBOARD_ACCOUNTS_URLS["feishu"])
 
 
-def _post_registration(base_url: str, body: dict[str, str]) -> dict:
+def _post_registration(base_url: str, body: dict[str, str]) -> dict[str, Any]:
     """POST form-encoded data to the registration endpoint, return parsed JSON.
 
     The registration endpoint returns JSON even on HTTP errors (e.g. poll
@@ -462,7 +521,8 @@ def _post_registration(base_url: str, body: dict[str, str]) -> dict:
         headers={"Content-Type": "application/x-www-form-urlencoded"},
     )
     try:
-        return resp.json()
+        parsed = resp.json()
+        return _as_json_object(parsed) or {}
     except json.JSONDecodeError:
         resp.raise_for_status()
         return {}
@@ -472,7 +532,7 @@ def _init_registration(domain: str = "feishu") -> None:
     """Verify the environment supports client_secret auth. Raises RuntimeError if not."""
     base_url = _accounts_base_url(domain)
     res = _post_registration(base_url, {"action": "init"})
-    methods = res.get("supported_auth_methods") or []
+    methods = _as_json_list(res.get("supported_auth_methods")) or []
     if "client_secret" not in methods:
         raise RuntimeError(
             f"Feishu / Lark registration does not support client_secret auth. "
@@ -480,7 +540,7 @@ def _init_registration(domain: str = "feishu") -> None:
         )
 
 
-def _begin_registration(domain: str = "feishu") -> dict:
+def _begin_registration(domain: str = "feishu") -> _RegistrationStart:
     """Start the device-code flow. Returns device_code, qr_url, interval, expire_in."""
     base_url = _accounts_base_url(domain)
     res = _post_registration(base_url, {
@@ -490,16 +550,18 @@ def _begin_registration(domain: str = "feishu") -> dict:
         "request_user_info": "open_id",
     })
     device_code = res.get("device_code")
-    if not device_code:
+    if not isinstance(device_code, str) or not device_code:
         raise RuntimeError("Feishu / Lark registration did not return a device_code")
     qr_url = res.get("verification_uri_complete", "")
-    if not qr_url:
+    if not isinstance(qr_url, str) or not qr_url:
         raise RuntimeError("Feishu / Lark registration did not return a login URL")
+    interval = res.get("interval")
+    expire_in = res.get("expire_in")
     return {
         "device_code": device_code,
         "qr_url": qr_url,
-        "interval": res.get("interval") or 5,
-        "expire_in": res.get("expire_in") or 600,
+        "interval": interval if isinstance(interval, int) else 5,
+        "expire_in": expire_in if isinstance(expire_in, int) else 600,
     }
 
 
@@ -509,7 +571,7 @@ def _poll_registration(
     interval: int,
     expire_in: int,
     domain: str = "feishu",
-) -> dict | None:
+) -> dict[str, Any] | None:
     """Poll until the user scans the QR code, or timeout/denial.
 
     Returns dict with app_id, app_secret, domain on success, None on failure.
@@ -548,7 +610,7 @@ def poll_registration_once(
     *,
     device_code: str,
     domain: str = "feishu",
-) -> dict:
+) -> dict[str, Any]:
     """Poll the Feishu/Lark device-code flow once.
 
     This non-blocking shape is used by WebUI. The CLI keeps using
@@ -562,7 +624,7 @@ def poll_registration_once(
         "tp": "ob_app",
     })
 
-    user_info = res.get("user_info") or {}
+    user_info = _as_json_object(res.get("user_info")) or {}
     tenant_brand = user_info.get("tenant_brand")
     if tenant_brand == "lark":
         current_domain = "lark"
@@ -641,9 +703,7 @@ def sync_saved_feishu_identity_boundary(
     from nanobot.config.loader import load_config, save_config
 
     full_config = load_config()
-    feishu_cfg = getattr(full_config.channels, "feishu", None) or {}
-    if not isinstance(feishu_cfg, dict):
-        feishu_cfg = {}
+    feishu_cfg = _as_json_object(getattr(full_config.channels, "feishu", None)) or {}
 
     defaults = feishu_default_config()
     previous_identity_key = ""
@@ -675,7 +735,7 @@ def sync_saved_feishu_identity_boundary(
 
 
 def save_registration_result(
-    result: dict,
+    result: dict[str, Any],
     *,
     instance_id: str = DEFAULT_INSTANCE_ID,
     name: str | None = None,
@@ -684,9 +744,7 @@ def save_registration_result(
     from nanobot.config.loader import load_config, save_config
 
     full_config = load_config()
-    feishu_cfg = getattr(full_config.channels, "feishu", None) or {}
-    if not isinstance(feishu_cfg, dict):
-        feishu_cfg = {}
+    feishu_cfg = _as_json_object(getattr(full_config.channels, "feishu", None)) or {}
     defaults = feishu_default_config()
     app_id = str(result["app_id"]).strip()
     domain = str(result.get("domain", "feishu") or "feishu").strip().lower()
@@ -809,7 +867,7 @@ def refresh_saved_feishu_identities(
 def qr_register(
     *,
     initial_domain: str = "feishu",
-) -> dict | None:
+) -> dict[str, Any] | None:
     """Run the Feishu / Lark scan-to-create QR registration flow.
 
     Returns on success:
@@ -853,7 +911,7 @@ def _print_qr_code(url: str) -> None:
 def _qr_register_inner(
     *,
     initial_domain: str,
-) -> dict | None:
+) -> dict[str, Any] | None:
     """Run init → begin → poll. Raises on network/protocol errors."""
     _LOGIN_CONSOLE.print("[cyan]Preparing Feishu/Lark login...[/cyan]")
     _init_registration(initial_domain)
@@ -935,7 +993,7 @@ class FeishuChannel(BaseChannel):
         self._loop: asyncio.AbstractEventLoop | None = None
         self._stream_bufs: dict[str, _FeishuStreamBuf] = {}
         self._bot_open_id: str | None = None
-        self._background_tasks: set[asyncio.Task] = set()
+        self._background_tasks: set[asyncio.Task[Any]] = set()
         self._reaction_ids: dict[str, str] = {}  # message_id → reaction_id
 
     # ------------------------------------------------------------------
@@ -1062,12 +1120,12 @@ class FeishuChannel(BaseChannel):
         builder = self._register_optional_event(
             builder,
             "register_p2_im_chat_member_bot_added_v1",
-            lambda _: None,
+            _ignore_event,
         )
         builder = self._register_optional_event(
             builder,
             "register_p2_im_chat_member_bot_deleted_v1",
-            lambda _: None,
+            _ignore_event,
         )
         event_handler = builder.build()
 
@@ -1126,9 +1184,11 @@ class FeishuChannel(BaseChannel):
             if response.success():
                 import json
 
-                data = json.loads(response.raw.content)
-                bot = (data.get("data") or data).get("bot") or data.get("bot") or {}
-                return bot.get("open_id")
+                data = _as_json_object(json.loads(response.raw.content)) or {}
+                wrapped = _as_json_object(data.get("data")) or data
+                bot = _as_json_object(wrapped.get("bot")) or _as_json_object(data.get("bot")) or {}
+                open_id = bot.get("open_id")
+                return open_id if isinstance(open_id, str) else None
             self.logger.warning("Failed to get bot info: code={}, msg={}", response.code, response.msg)
             return None
         except Exception as e:
@@ -1218,7 +1278,7 @@ class FeishuChannel(BaseChannel):
         if "@_all" in raw_content:
             return True
 
-        for mention in getattr(message, "mentions", None) or []:
+        for mention in cast(list[Any], getattr(message, "mentions", None) or []):
             if self._is_bot_mention_event(mention):
                 return True
         return False
@@ -1312,7 +1372,7 @@ class FeishuChannel(BaseChannel):
         loop = asyncio.get_running_loop()
         await loop.run_in_executor(None, self._remove_reaction_sync, message_id, reaction_id)
 
-    def _on_background_task_done(self, task: asyncio.Task) -> None:
+    def _on_background_task_done(self, task: asyncio.Task[Any]) -> None:
         """Callback: remove from tracking set and log unhandled exceptions."""
         self._background_tasks.discard(task)
         if task.cancelled():
@@ -1322,7 +1382,7 @@ class FeishuChannel(BaseChannel):
         except Exception as exc:
             self.logger.warning("Background task failed: {}", exc)
 
-    def _on_reaction_added(self, message_id: str, task: asyncio.Task) -> None:
+    def _on_reaction_added(self, message_id: str, task: asyncio.Task[Any]) -> None:
         """Callback: store reaction_id after background add-reaction completes."""
         if task.cancelled():
             return
@@ -1375,7 +1435,7 @@ class FeishuChannel(BaseChannel):
         return text
 
     @classmethod
-    def _parse_md_table(cls, table_text: str) -> dict | None:
+    def _parse_md_table(cls, table_text: str) -> dict[str, Any] | None:
         """Parse a markdown table into a Feishu table element."""
         lines = [_line.strip() for _line in table_text.strip().split("\n") if _line.strip()]
         if len(lines) < 3:
@@ -1399,7 +1459,7 @@ class FeishuChannel(BaseChannel):
             ],
         }
 
-    def _build_card_elements(self, content: str) -> list[dict]:
+    def _build_card_elements(self, content: str) -> list[dict[str, Any]]:
         """Split content into div/markdown + table elements for Feishu card."""
         protected = content
         code_blocks: list[str] = []
@@ -1407,7 +1467,8 @@ class FeishuChannel(BaseChannel):
             code_blocks.append(m.group(1))
             protected = protected.replace(m.group(1), f"\x00CODE{len(code_blocks) - 1}\x00", 1)
 
-        elements, last_end = [], 0
+        elements: list[dict[str, Any]] = []
+        last_end = 0
         for m in self._TABLE_RE.finditer(protected):
             before = protected[last_end : m.start()]
             if before.strip():
@@ -1429,8 +1490,8 @@ class FeishuChannel(BaseChannel):
 
     @staticmethod
     def _split_elements_by_table_limit(
-        elements: list[dict], max_tables: int = 1
-    ) -> list[list[dict]]:
+        elements: list[dict[str, Any]], max_tables: int = 1
+    ) -> list[list[dict[str, Any]]]:
         """Split card elements into groups with at most *max_tables* table elements each.
 
         Feishu cards have a hard limit of one table per card (API error 11310).
@@ -1439,8 +1500,8 @@ class FeishuChannel(BaseChannel):
         """
         if not elements:
             return [[]]
-        groups: list[list[dict]] = []
-        current: list[dict] = []
+        groups: list[list[dict[str, Any]]] = []
+        current: list[dict[str, Any]] = []
         table_count = 0
         for el in elements:
             if el.get("tag") == "table":
@@ -1457,15 +1518,15 @@ class FeishuChannel(BaseChannel):
             groups.append(current)
         return groups or [[]]
 
-    def _split_headings(self, content: str) -> list[dict]:
+    def _split_headings(self, content: str) -> list[dict[str, Any]]:
         """Split content by headings, converting headings to div elements."""
         protected = content
-        code_blocks = []
+        code_blocks: list[str] = []
         for m in self._CODE_BLOCK_RE.finditer(content):
             code_blocks.append(m.group(1))
             protected = protected.replace(m.group(1), f"\x00CODE{len(code_blocks) - 1}\x00", 1)
 
-        elements = []
+        elements: list[dict[str, Any]] = []
         last_end = 0
         for m in self._HEADING_RE.finditer(protected):
             before = protected[last_end : m.start()].strip()
@@ -1573,10 +1634,10 @@ class FeishuChannel(BaseChannel):
         Each line becomes a paragraph (row) in the post body.
         """
         lines = content.strip().split("\n")
-        paragraphs: list[list[dict]] = []
+        paragraphs: list[list[dict[str, Any]]] = []
 
         for line in lines:
-            elements: list[dict] = []
+            elements: list[dict[str, Any]] = []
             last_end = 0
 
             for m in cls._MD_LINK_RE.finditer(line):
@@ -1768,7 +1829,7 @@ class FeishuChannel(BaseChannel):
         return candidate
 
     async def _download_and_save_media(
-        self, msg_type: str, content_json: dict, message_id: str | None = None
+        self, msg_type: str, content_json: dict[str, Any], message_id: str | None = None
     ) -> tuple[str | None, str]:
         """
         Download media from Feishu and save to local disk.
@@ -2306,8 +2367,11 @@ class FeishuChannel(BaseChannel):
                 fallback_msg_id = self._thread_reply_target(meta)
                 if fallback_msg_id:
                     await loop.run_in_executor(
-                        None, lambda: self._reply_message_sync(
-                            fallback_msg_id, "interactive", card,
+                        None, partial(
+                            self._reply_message_sync,
+                            fallback_msg_id,
+                            "interactive",
+                            card,
                             reply_in_thread=self._should_use_reply_in_thread(meta),
                         ),
                     )
@@ -2563,6 +2627,9 @@ class FeishuChannel(BaseChannel):
             return
         try:
             event = data.event
+            if event is None or event.message is None or event.sender is None:
+                self.logger.warning("Ignoring incomplete Feishu message event")
+                return
             message = event.message
             sender = event.sender
 
@@ -2579,6 +2646,20 @@ class FeishuChannel(BaseChannel):
             chat_id = message.chat_id
             chat_type = message.chat_type
             msg_type = message.message_type
+            if not all(isinstance(value, str) and value for value in (
+                message_id,
+                sender_id,
+                chat_id,
+                chat_type,
+                msg_type,
+            )):
+                self.logger.warning("Ignoring Feishu message event with missing routing fields")
+                return
+            message_id = cast(str, message_id)
+            sender_id = cast(str, sender_id)
+            chat_id = cast(str, chat_id)
+            chat_type = cast(str, chat_type)
+            msg_type = cast(str, msg_type)
 
             if chat_type == "group" and not self._is_group_message_for_bot(message):
                 self.logger.debug("skipping group message (not mentioned)")
@@ -2616,17 +2697,19 @@ class FeishuChannel(BaseChannel):
             task.add_done_callback(lambda t: self._on_reaction_added(message_id, t))
 
             # Parse content
-            content_parts = []
-            media_paths = []
+            content_parts: list[str] = []
+            media_paths: list[str] = []
 
             try:
-                content_json = json.loads(message.content) if message.content else {}
+                raw_content = message.content if isinstance(message.content, str) else ""
+                content_json = _as_json_object(json.loads(raw_content)) if raw_content else {}
             except json.JSONDecodeError:
                 content_json = {}
+            content_json = content_json or {}
 
             if msg_type == "text":
                 text = content_json.get("text", "")
-                if text:
+                if isinstance(text, str) and text:
                     mentions = getattr(message, "mentions", None)
                     text = self._strip_leading_bot_mention(text, mentions)
                     text = self._resolve_mentions(text, mentions)
@@ -2676,9 +2759,12 @@ class FeishuChannel(BaseChannel):
                 content_parts.append(MSG_TYPE_MAP.get(msg_type, f"[{msg_type}]"))
 
             # Extract reply context (parent/root message IDs)
-            parent_id = getattr(message, "parent_id", None) or None
-            root_id = getattr(message, "root_id", None) or None
-            thread_id = getattr(message, "thread_id", None) or None
+            parent_id = getattr(message, "parent_id", None)
+            root_id = getattr(message, "root_id", None)
+            thread_id = getattr(message, "thread_id", None)
+            parent_id = parent_id if isinstance(parent_id, str) else None
+            root_id = root_id if isinstance(root_id, str) else None
+            thread_id = thread_id if isinstance(thread_id, str) else None
 
             # Prepend quoted message text when the user replied to another message
             if parent_id and self._client:

nanobot/channels/feishu/websocket.py

@@ -1,3 +1,4 @@
+# pyright: reportMissingTypeStubs=false, reportPrivateUsage=false
 """Shared Feishu/Lark WebSocket runtime.
 
 The official lark_oapi websocket client stores an asyncio loop in a module-level
@@ -148,7 +149,7 @@ class FeishuWsRunner:
     async def _client_main(
         self, key: str, client: _LarkWsClient, stop_event: asyncio.Event
     ) -> None:
-        ping_task: asyncio.Task | None = None
+        ping_task: asyncio.Task[None] | None = None
         while not stop_event.is_set():
             try:
                 await client._connect()
@@ -171,12 +172,12 @@ class FeishuWsRunner:
                     await client._disconnect()
 
 
-_RUNNER: FeishuWsRunner | None = None
+_runner: FeishuWsRunner | None = None
 
 
 def get_feishu_ws_runner() -> FeishuWsRunner:
     """Return the process-wide Feishu WebSocket runner."""
-    global _RUNNER
-    if _RUNNER is None:
-        _RUNNER = FeishuWsRunner()
-    return _RUNNER
+    global _runner
+    if _runner is None:
+        _runner = FeishuWsRunner()
+    return _runner

nanobot/channels/manager.py

@@ -8,7 +8,7 @@ import inspect
 from collections.abc import Callable, Iterable
 from contextlib import suppress
 from pathlib import Path
-from typing import TYPE_CHECKING, Any
+from typing import TYPE_CHECKING, Any, cast
 
 from loguru import logger
 
@@ -41,7 +41,9 @@ from nanobot.utils.restart import (
 )
 
 if TYPE_CHECKING:
+    from nanobot.cron.service import CronService
     from nanobot.session.manager import SessionManager
+    from nanobot.triggers.local_store import LocalTriggerStore
 
 
 def _default_webui_dist() -> Path | None:
@@ -90,8 +92,8 @@ class ChannelManager:
         bus: MessageBus,
         *,
         session_manager: "SessionManager | None" = None,
-        cron_service: Any | None = None,
-        local_trigger_store: Any | None = None,
+        cron_service: CronService | None = None,
+        local_trigger_store: LocalTriggerStore | None = None,
         webui_runtime_model_name: Callable[[], str | None] | None = None,
         webui_cron_pending_job_ids: Callable[[str], set[str]] | None = None,
         webui_local_trigger_pending_ids: Callable[[str], set[str]] | None = None,
@@ -114,8 +116,8 @@ class ChannelManager:
         self._channel_owners: dict[str, str] = {}
         self._channel_runtime_specs: dict[str, tuple[str, str]] = {}
         self._channel_errors: dict[str, str] = {}
-        self._channel_tasks: dict[str, asyncio.Task] = {}
-        self._dispatch_task: asyncio.Task | None = None
+        self._channel_tasks: dict[str, asyncio.Task[None]] = {}
+        self._dispatch_task: asyncio.Task[None] | None = None
         self._started = False
         self._origin_reply_fingerprints: dict[tuple[str, str, str], str] = {}
 
@@ -291,10 +293,11 @@ class ChannelManager:
         for name, ch in self.channels.items():
             cfg = ch.config
             if isinstance(cfg, dict):
-                if "allow_from" in cfg:
-                    allow = cfg.get("allow_from")
+                config_data = cast(dict[str, Any], cfg)
+                if "allow_from" in config_data:
+                    allow = config_data.get("allow_from")
                 else:
-                    allow = cfg.get("allowFrom")
+                    allow = config_data.get("allowFrom")
             else:
                 allow = getattr(cfg, "allow_from", None)
             if allow is None:
@@ -321,11 +324,12 @@ class ChannelManager:
         Pydantic models.
         """
         if isinstance(section, dict):
-            value = section.get(key)
+            section_data = cast(dict[str, Any], section)
+            value = section_data.get(key)
             if value is None:
                 camel = _BOOL_CAMEL_ALIASES.get(key)
                 if camel:
-                    value = section.get(camel)
+                    value = section_data.get(camel)
             return value if isinstance(value, bool) else default
         value = getattr(section, key, None)
         return value if isinstance(value, bool) else default
@@ -344,7 +348,7 @@ class ChannelManager:
             errors[name] = "Channel failed to start. Check gateway logs."
             logger.exception("Failed to start channel {}", name)
 
-    def _start_channel_task(self, name: str, channel: BaseChannel) -> asyncio.Task:
+    def _start_channel_task(self, name: str, channel: BaseChannel) -> asyncio.Task[None]:
         logger.info("Starting {} channel...", name)
         task = asyncio.create_task(self._start_channel(name, channel))
         self._channel_tasks[name] = task
@@ -361,7 +365,8 @@ class ChannelManager:
             await channel.stop()
             logger.info("Stopped {} channel", name)
         except asyncio.CancelledError:
-            if asyncio.current_task() and asyncio.current_task().cancelling():
+            current_task = asyncio.current_task()
+            if current_task is not None and current_task.cancelling():
                 raise
             logger.debug("Channel {} stop task was already cancelled", name)
         except Exception:
@@ -553,7 +558,7 @@ class ChannelManager:
         self._dispatch_task = asyncio.create_task(self._dispatch_outbound())
 
         # Start channels
-        tasks = []
+        tasks: list[asyncio.Task[None]] = []
         for name, channel in self.channels.items():
             tasks.append(self._start_channel_task(name, channel))
 

nanobot/channels/matrix/runtime.py

@@ -1,5 +1,7 @@
 """Matrix (Element) channel — inbound sync + outbound message/media delivery."""
 
+# pyright: reportMissingTypeStubs=false
+
 import asyncio
 import html
 import json
@@ -10,7 +12,7 @@ import time
 from contextlib import suppress
 from dataclasses import dataclass
 from pathlib import Path
-from typing import Any, Literal, TypeAlias
+from typing import Any, Callable, Literal, Protocol, TypeAlias, cast
 from urllib.parse import quote, unquote, urlparse
 
 from pydantic import Field
@@ -75,6 +77,18 @@ MATRIX_MEDIA_EVENT_FILTER = (RoomMessageMedia, RoomEncryptedMedia)
 MatrixMediaEvent: TypeAlias = RoomMessageMedia | RoomEncryptedMedia
 
 
+class _MatrixCallbackRegistrar(Protocol):
+    """Runtime callback surface whose upstream stubs reject valid filtered handlers."""
+
+    def add_event_callback(self, callback: Callable[..., Any], event_filter: Any) -> None: ...
+    def add_to_device_callback(
+        self,
+        callback: Callable[..., Any],
+        event_filter: Any,
+    ) -> None: ...
+    def add_response_callback(self, callback: Callable[..., Any], response_filter: Any) -> None: ...
+
+
 class _MediaTooLargeError(Exception):
     """Raised when an inbound Matrix media download exceeds the configured cap."""
 
@@ -187,7 +201,7 @@ def _render_markdown_html(text: str) -> str | None:
     """Render markdown to sanitized HTML; returns None for plain text."""
     try:
         masked_text = _mask_mxc_markdown_image_sources(text)
-        rendered = _mask_mxc_image_sources(MATRIX_MARKDOWN(masked_text))
+        rendered = _mask_mxc_image_sources(cast(str, MATRIX_MARKDOWN(masked_text)))
         formatted = _unmask_mxc_image_sources(MATRIX_HTML_CLEANER.clean(rendered).strip())
     except Exception:
         return None
@@ -229,16 +243,17 @@ def _build_matrix_text_content(
         content["format"] = MATRIX_HTML_FORMAT
         content["formatted_body"] = html
     if event_id:
-        content["m.new_content"] = {
+        new_content: dict[str, object] = {
             "body": text,
             "msgtype": "m.text",
         }
+        content["m.new_content"] = new_content
         content["m.relates_to"] = {
             "rel_type": "m.replace",
             "event_id": event_id,
         }
         if thread_relates_to:
-            content["m.new_content"]["m.relates_to"] = thread_relates_to
+            new_content["m.relates_to"] = thread_relates_to
     elif thread_relates_to:
         content["m.relates_to"] = thread_relates_to
 
@@ -276,7 +291,7 @@ class MatrixChannel(BaseChannel):
     name = "matrix"
     display_name = "Matrix"
     _STREAM_EDIT_INTERVAL = 2 # min seconds between edit_message_text calls
-    monotonic_time = time.monotonic
+    monotonic_time: Callable[[], float] = staticmethod(time.monotonic)
 
     @classmethod
     def default_config(cls) -> dict[str, Any]:
@@ -294,8 +309,8 @@ class MatrixChannel(BaseChannel):
             config = MatrixConfig.model_validate(config)
         super().__init__(config, bus)
         self.client: AsyncClient | None = None
-        self._sync_task: asyncio.Task | None = None
-        self._typing_tasks: dict[str, asyncio.Task] = {}
+        self._sync_task: asyncio.Task[None] | None = None
+        self._typing_tasks: dict[str, asyncio.Task[None]] = {}
         self._restrict_to_workspace = bool(restrict_to_workspace)
         self._workspace = (
             Path(workspace).expanduser().resolve(strict=False) if workspace is not None else None
@@ -325,7 +340,7 @@ class MatrixChannel(BaseChannel):
         self.client = AsyncClient(
             homeserver=self.config.homeserver,
             user=self.config.user_id,
-            store_path=self.store_path,
+            store_path=str(self.store_path),
             config=AsyncClientConfig(
                 store_sync_tokens=True,
                 encryption_enabled=self.config.e2ee_enabled,
@@ -386,6 +401,16 @@ class MatrixChannel(BaseChannel):
 
         self._sync_task = asyncio.create_task(self._sync_loop())
 
+    def _require_client(self) -> AsyncClient:
+        if self.client is None:
+            raise RuntimeError("Matrix client is not started")
+        return self.client
+
+    def _callback_registrar(self) -> _MatrixCallbackRegistrar:
+        # matrix-nio's callback annotations do not model filtered subtype or
+        # async handlers, although the runtime API supports both.
+        return cast(_MatrixCallbackRegistrar, self._require_client())
+
     async def stop(self) -> None:
         """Stop the Matrix channel with graceful sync shutdown."""
         self._running = False
@@ -428,9 +453,10 @@ class MatrixChannel(BaseChannel):
         seen: set[str] = set()
         candidates: list[Path] = []
         for raw in media:
-            if not isinstance(raw, str) or not raw.strip():
+            raw_value = cast(object, raw)
+            if not isinstance(raw_value, str) or not raw_value.strip():
                 continue
-            path = Path(raw.strip()).expanduser()
+            path = Path(raw_value.strip()).expanduser()
             try:
                 key = str(path.resolve(strict=False))
             except OSError:
@@ -535,8 +561,13 @@ class MatrixChannel(BaseChannel):
             self.logger.error("Matrix media upload failed for %s", filename, exc_info=True)
             return fail
 
-        upload_response = upload_result[0] if isinstance(upload_result, tuple) else upload_result
-        encryption_info = upload_result[1] if isinstance(upload_result, tuple) and isinstance(upload_result[1], dict) else None
+        is_tuple_result = isinstance(cast(object, upload_result), tuple)
+        upload_response = upload_result[0] if is_tuple_result else upload_result
+        encryption_info = (
+            upload_result[1]
+            if is_tuple_result and isinstance(cast(object, upload_result[1]), dict)
+            else None
+        )
         if isinstance(upload_response, UploadError):
             return fail
         mxc_url = getattr(upload_response, "content_uri", None)
@@ -645,28 +676,31 @@ class MatrixChannel(BaseChannel):
                 buf.last_edit = now
                 if not buf.event_id:
                     # we are editing the same message all the time, so only the first time the event id needs to be set
-                    buf.event_id = response.event_id
+                    buf.event_id = cast(RoomSendResponse, response).event_id
             except Exception:
                 self.logger.error("Stream send/edit failed for chat_id=%s", chat_id, exc_info=True)
                 await self._stop_typing_keepalive(chat_id, clear_typing=True)
 
 
     def _register_event_callbacks(self) -> None:
-        self.client.add_event_callback(self._on_message, RoomMessageText)
-        self.client.add_event_callback(self._on_media_message, MATRIX_MEDIA_EVENT_FILTER)
-        self.client.add_event_callback(self._on_room_invite, InviteEvent)
+        client = self._callback_registrar()
+        client.add_event_callback(self._on_message, RoomMessageText)
+        client.add_event_callback(self._on_media_message, MATRIX_MEDIA_EVENT_FILTER)
+        client.add_event_callback(self._on_room_invite, InviteEvent)
 
     def _register_to_device_callbacks(self) -> None:
         if self.config.e2ee_enabled and self.config.sas_verification:
-            self.client.add_to_device_callback(
+            client = self._callback_registrar()
+            client.add_to_device_callback(
                 self._on_key_verification_event,
                 (KeyVerificationEvent,),
             )
 
     def _register_response_callbacks(self) -> None:
-        self.client.add_response_callback(self._on_sync_error, SyncError)
-        self.client.add_response_callback(self._on_join_error, JoinError)
-        self.client.add_response_callback(self._on_send_error, RoomSendError)
+        client = self._callback_registrar()
+        client.add_response_callback(self._on_sync_error, SyncError)
+        client.add_response_callback(self._on_join_error, JoinError)
+        client.add_response_callback(self._on_send_error, RoomSendError)
 
     def _is_sas_sender_allowed(self, sender: str) -> bool:
         return bool(sender and self.is_allowed(sender))
@@ -791,7 +825,8 @@ class MatrixChannel(BaseChannel):
         backoff = 2.0
         while self._running:
             try:
-                await self.client.sync_forever(timeout=30000, full_state=True)
+                client = self._require_client()
+                await client.sync_forever(timeout=30000, full_state=True)
                 backoff = 2.0
             except asyncio.CancelledError:
                 break
@@ -803,7 +838,8 @@ class MatrixChannel(BaseChannel):
 
     async def _on_room_invite(self, room: MatrixRoom, event: InviteEvent) -> None:
         if self.is_allowed(event.sender):
-            await self.client.join(room.room_id)
+            client = self._require_client()
+            await client.join(room.room_id)
 
     def _is_direct_room(self, room: MatrixRoom) -> bool:
         count = getattr(room, "member_count", None)
@@ -814,13 +850,19 @@ class MatrixChannel(BaseChannel):
         source = getattr(event, "source", None)
         if not isinstance(source, dict):
             return False
-        mentions = (source.get("content") or {}).get("m.mentions")
+        source_data = cast(dict[str, Any], source)
+        content = cast(dict[str, Any], source_data.get("content") or {})
+        mentions = cast(object, content.get("m.mentions"))
         if not isinstance(mentions, dict):
             return False
-        user_ids = mentions.get("user_ids")
+        mentions_data = cast(dict[str, Any], mentions)
+        user_ids = cast(object, mentions_data.get("user_ids"))
         if isinstance(user_ids, list) and self.config.user_id in user_ids:
             return True
-        return bool(self.config.allow_room_mentions and mentions.get("room") is True)
+        return bool(
+            self.config.allow_room_mentions
+            and mentions_data.get("room") is True
+        )
 
     def _is_pre_startup_event(self, event: RoomMessage) -> bool:
         """Skip events that landed in the timeline before this process started.
@@ -855,14 +897,21 @@ class MatrixChannel(BaseChannel):
         source = getattr(event, "source", None)
         if not isinstance(source, dict):
             return {}
-        content = source.get("content")
-        return content if isinstance(content, dict) else {}
+        source_data = cast(dict[str, Any], source)
+        content = cast(object, source_data.get("content"))
+        return cast(dict[str, Any], content) if isinstance(content, dict) else {}
 
     def _event_thread_root_id(self, event: RoomMessage) -> str | None:
-        relates_to = self._event_source_content(event).get("m.relates_to")
-        if not isinstance(relates_to, dict) or relates_to.get("rel_type") != "m.thread":
+        relates_to = cast(
+            object,
+            self._event_source_content(event).get("m.relates_to"),
+        )
+        if not isinstance(relates_to, dict):
             return None
-        root_id = relates_to.get("event_id")
+        relation = cast(dict[str, Any], relates_to)
+        if relation.get("rel_type") != "m.thread":
+            return None
+        root_id = cast(object, relation.get("event_id"))
         return root_id if isinstance(root_id, str) and root_id else None
 
     def _thread_metadata(self, event: RoomMessage) -> dict[str, str] | None:
@@ -888,7 +937,7 @@ class MatrixChannel(BaseChannel):
 
     def _event_attachment_type(self, event: MatrixMediaEvent) -> str:
         msgtype = self._event_source_content(event).get("msgtype")
-        return _MSGTYPE_MAP.get(msgtype, "file")
+        return _MSGTYPE_MAP.get(cast(str, msgtype), "file")
 
     @staticmethod
     def _is_encrypted_media_event(event: MatrixMediaEvent) -> bool:
@@ -897,16 +946,27 @@ class MatrixChannel(BaseChannel):
                 and isinstance(getattr(event, "iv", None), str))
 
     def _event_declared_size_bytes(self, event: MatrixMediaEvent) -> int | None:
-        info = self._event_source_content(event).get("info")
-        size = info.get("size") if isinstance(info, dict) else None
+        info = cast(object, self._event_source_content(event).get("info"))
+        size = (
+            cast(dict[str, Any], info).get("size")
+            if isinstance(info, dict)
+            else None
+        )
         return size if type(size) is int and size >= 0 else None  # noqa: E721
 
     def _event_mime(self, event: MatrixMediaEvent) -> str | None:
-        info = self._event_source_content(event).get("info")
-        if isinstance(info, dict) and isinstance(m := info.get("mimetype"), str) and m:
-            return m
-        m = getattr(event, "mimetype", None)
-        return m if isinstance(m, str) and m else None
+        info = cast(object, self._event_source_content(event).get("info"))
+        if (
+            isinstance(info, dict)
+            and isinstance(
+                mime := cast(dict[str, Any], info).get("mimetype"),
+                str,
+            )
+            and mime
+        ):
+            return mime
+        mime = getattr(event, "mimetype", None)
+        return mime if isinstance(mime, str) and mime else None
 
     def _event_filename(self, event: MatrixMediaEvent, attachment_type: str) -> str:
         body = getattr(event, "body", None)
@@ -973,9 +1033,21 @@ class MatrixChannel(BaseChannel):
 
     def _decrypt_media_bytes(self, event: MatrixMediaEvent, ciphertext: bytes) -> bytes | None:
         key_obj, hashes, iv = getattr(event, "key", None), getattr(event, "hashes", None), getattr(event, "iv", None)
-        key = key_obj.get("k") if isinstance(key_obj, dict) else None
-        sha256 = hashes.get("sha256") if isinstance(hashes, dict) else None
-        if not all(isinstance(v, str) for v in (key, sha256, iv)):
+        key = (
+            cast(dict[str, Any], key_obj).get("k")
+            if isinstance(key_obj, dict)
+            else None
+        )
+        sha256 = (
+            cast(dict[str, Any], hashes).get("sha256")
+            if isinstance(hashes, dict)
+            else None
+        )
+        if (
+            not isinstance(key, str)
+            or not isinstance(sha256, str)
+            or not isinstance(iv, str)
+        ):
             return None
         try:
             return decrypt_attachment(ciphertext, key, sha256, iv)

nanobot/channels/mattermost/runtime.py

@@ -6,7 +6,7 @@ import asyncio
 import json
 import re
 from pathlib import Path
-from typing import Any
+from typing import Any, cast
 
 import httpx
 from pydantic import Field
@@ -86,7 +86,7 @@ class MattermostChannel(BaseChannel):
         self._server_url = config.server_url.rstrip("/")
         self._ws_url = _server_url_to_ws_url(self._server_url)
         self._http_client: httpx.AsyncClient | None = None
-        self._ws_task: asyncio.Task | None = None
+        self._ws_task: asyncio.Task[None] | None = None
         self._self_id: str | None = None
         self._self_username: str | None = None
         self._self_email: str | None = None
@@ -118,7 +118,7 @@ class MattermostChannel(BaseChannel):
         try:
             resp = await self._http_client.get("/api/v4/users/me")
             resp.raise_for_status()
-            me = resp.json()
+            me = cast(dict[str, Any], resp.json())
             self._self_id = me.get("id")
             self._self_username = me.get("username")
             self._self_email = me.get("email", "")
@@ -169,7 +169,7 @@ class MattermostChannel(BaseChannel):
                     self.logger.debug("websocket connected")
                     delay = MATTERMOST_WS_RECONNECT_BASE_DELAY
                     async for raw in ws:
-                        await self._handle_ws_message(json.loads(raw))
+                        await self._handle_ws_message(cast(dict[str, Any], json.loads(raw)))
             except asyncio.CancelledError:
                 break
             except Exception as e:
@@ -191,12 +191,15 @@ class MattermostChannel(BaseChannel):
     # Event: posted ------------------------------------------------------------
 
     async def _handle_posted_event(self, msg: dict[str, Any]) -> None:
-        data = msg.get("data", {})
-        broadcast = msg.get("broadcast", {})
+        data = cast(dict[str, Any], msg.get("data", {}))
+        broadcast = cast(dict[str, Any], msg.get("broadcast", {}))
 
         raw_post = data.get("post", "{}")
         try:
-            post = json.loads(raw_post) if isinstance(raw_post, str) else raw_post
+            post = cast(
+                dict[str, Any],
+                json.loads(raw_post) if isinstance(raw_post, str) else raw_post,
+            )
         except json.JSONDecodeError:
             self.logger.warning("failed to parse post json")
             return
@@ -206,7 +209,7 @@ class MattermostChannel(BaseChannel):
         message_text = post.get("message", "")
         root_id = post.get("root_id", "") or ""
         post_id = post.get("id", "")
-        file_ids: list[str] = post.get("file_ids", [])
+        file_ids = cast(list[str], post.get("file_ids", []))
 
         if self._self_id and sender_id == self._self_id:
             return
@@ -292,11 +295,11 @@ class MattermostChannel(BaseChannel):
     # Event: action ------------------------------------------------------------
 
     async def _handle_action_event(self, msg: dict[str, Any]) -> None:
-        data = msg.get("data", {})
+        data = cast(dict[str, Any], msg.get("data", {}))
         sender_id = data.get("user_id", "")
         channel_id = data.get("channel_id", "")
-        context = data.get("context", {}) or {}
-        value = context.get("selected_option", "")
+        context = cast(dict[str, Any], data.get("context", {}) or {})
+        value = cast(str, context.get("selected_option", ""))
 
         if not sender_id or not channel_id or not value:
             return
@@ -319,10 +322,13 @@ class MattermostChannel(BaseChannel):
     # Event: post_deleted ------------------------------------------------------
 
     async def _handle_post_deleted_event(self, msg: dict[str, Any]) -> None:
-        data = msg.get("data", {})
+        data = cast(dict[str, Any], msg.get("data", {}))
         raw_post = data.get("post", "{}")
         try:
-            post = json.loads(raw_post) if isinstance(raw_post, str) else raw_post
+            post = cast(
+                dict[str, Any],
+                json.loads(raw_post) if isinstance(raw_post, str) else raw_post,
+            )
         except json.JSONDecodeError:
             return
         post_id = post.get("id", "")
@@ -363,15 +369,15 @@ class MattermostChannel(BaseChannel):
             return chat_id in self.config.group_allow_from
         return False
 
-    _BOT_MENTION_RE: re.Pattern | None = None
+    _bot_mention_re: re.Pattern[str] | None = None
 
     def _is_mentioned(self, text: str) -> bool:
         if not self._self_username:
             return False
-        if self._BOT_MENTION_RE is None:
+        if self._bot_mention_re is None:
             pat = r"(?<![@\w])@" + re.escape(self._self_username) + r"(?![@\w])"
-            self._BOT_MENTION_RE = re.compile(pat)
-        return bool(self._BOT_MENTION_RE.search(text))
+            self._bot_mention_re = re.compile(pat)
+        return bool(self._bot_mention_re.search(text))
 
     def _strip_bot_mention(self, text: str) -> str:
         if not text or not self._self_username:
@@ -432,8 +438,8 @@ class MattermostChannel(BaseChannel):
             self.logger.warning("thread context unavailable for {}: {}", key, e)
             return text
 
-        posts = data.get("posts", {})
-        order = data.get("order", [])
+        posts = cast(dict[str, dict[str, Any]], data.get("posts", {}))
+        order = cast(list[str], data.get("order", []))
         if not order:
             return text
 
@@ -467,8 +473,11 @@ class MattermostChannel(BaseChannel):
         try:
             chat_id = msg.chat_id
             meta = msg.metadata or {}
-            mm_meta = meta.get("mattermost", {}) or {}
-            root_id = mm_meta.get("root_id") or mm_meta.get("thread_ts") or meta.get("root_id")
+            mm_meta = cast(dict[str, Any], meta.get("mattermost", {}) or {})
+            root_id = cast(
+                str | None,
+                mm_meta.get("root_id") or mm_meta.get("thread_ts") or meta.get("root_id"),
+            )
 
             file_ids: list[str] = []
             for media_path in msg.media or []:
@@ -521,7 +530,7 @@ class MattermostChannel(BaseChannel):
             return
 
         meta = metadata or {}
-        stream_id = stream_id or meta.get("_stream_id") or chat_id
+        stream_id = cast(str, stream_id or meta.get("_stream_id") or chat_id)
         stream_end = stream_end or bool(meta.get("_stream_end"))
         resuming = resuming or bool(meta.get("_resuming"))
 
@@ -541,13 +550,17 @@ class MattermostChannel(BaseChannel):
                 return
 
             if final and not meta.get("_progress"):
-                mm_meta = (meta.get("mattermost", {}) or {}) if isinstance(meta.get("mattermost"), dict) else {}
-                root_id = (
+                mm_meta = (
+                    cast(dict[str, Any], meta.get("mattermost", {}) or {})
+                    if isinstance(meta.get("mattermost"), dict)
+                    else {}
+                )
+                root_id = cast(str | None, (
                     mm_meta.get("root_id")
                     or mm_meta.get("thread_ts")
                     or meta.get("root_id")
                     or self._stream_root_ids.get(stream_id)
-                )
+                ))
                 chunks = split_message(final, MATTERMOST_MAX_MESSAGE_LEN)
                 first_post_id: str | None = None
                 try:
@@ -579,8 +592,15 @@ class MattermostChannel(BaseChannel):
         if not delta.strip():
             return
 
-        mm_meta = (meta.get("mattermost", {}) or {}) if isinstance(meta.get("mattermost"), dict) else {}
-        root_id = mm_meta.get("root_id") or mm_meta.get("thread_ts") or meta.get("root_id")
+        mm_meta = (
+            cast(dict[str, Any], meta.get("mattermost", {}) or {})
+            if isinstance(meta.get("mattermost"), dict)
+            else {}
+        )
+        root_id = cast(
+            str | None,
+            mm_meta.get("root_id") or mm_meta.get("thread_ts") or meta.get("root_id"),
+        )
         if root_id:
             self._stream_root_ids[stream_id] = root_id
         committed = self._stream_committed.get(stream_id, "")
@@ -598,20 +618,25 @@ class MattermostChannel(BaseChannel):
 
     # API helpers ---------------------------------------------------------------
 
+    def _require_http_client(self) -> httpx.AsyncClient:
+        if self._http_client is None:
+            raise RuntimeError("Mattermost client is not started")
+        return self._http_client
+
     async def _api_get(self, path: str) -> dict[str, Any]:
-        resp = await self._http_client.get(path)
+        resp = await self._require_http_client().get(path)
         resp.raise_for_status()
-        return resp.json()
+        return cast(dict[str, Any], resp.json())
 
     async def _api_post(self, path: str, json_data: dict[str, Any]) -> dict[str, Any]:
-        resp = await self._http_client.post(path, json=json_data)
+        resp = await self._require_http_client().post(path, json=json_data)
         resp.raise_for_status()
-        return resp.json()
+        return cast(dict[str, Any], resp.json())
 
     async def _api_put(self, path: str, json_data: dict[str, Any]) -> dict[str, Any]:
-        resp = await self._http_client.put(path, json=json_data)
+        resp = await self._require_http_client().put(path, json=json_data)
         resp.raise_for_status()
-        return resp.json()
+        return cast(dict[str, Any], resp.json())
 
     async def _create_post(
         self,
@@ -642,14 +667,14 @@ class MattermostChannel(BaseChannel):
 
         try:
             files = {"files": (path.name, path.read_bytes())}
-            resp = await self._http_client.post(
+            resp = await self._require_http_client().post(
                 "/api/v4/files",
                 data={"channel_id": channel_id},
                 files=files,
             )
             resp.raise_for_status()
-            data = resp.json()
-            infos = data.get("file_infos", [])
+            data = cast(dict[str, Any], resp.json())
+            infos = cast(list[dict[str, Any]], data.get("file_infos", []))
             if infos:
                 return infos[0].get("id")
         except Exception as e:
@@ -658,14 +683,15 @@ class MattermostChannel(BaseChannel):
 
     async def _download_file(self, file_id: str) -> str | None:
         try:
-            info_resp = await self._http_client.get(f"/api/v4/files/{file_id}/info")
+            client = self._require_http_client()
+            info_resp = await client.get(f"/api/v4/files/{file_id}/info")
             info_resp.raise_for_status()
-            info = info_resp.json()
+            info = cast(dict[str, Any], info_resp.json())
             name = Path(info.get("name", file_id)).name
             out = Path(get_media_dir("mattermost")) / safe_filename(f"{file_id}_{name}")
             out.parent.mkdir(parents=True, exist_ok=True)
 
-            dl = await self._http_client.get(f"/api/v4/files/{file_id}")
+            dl = await client.get(f"/api/v4/files/{file_id}")
             dl.raise_for_status()
             out.write_bytes(dl.content)
             return str(out)
@@ -685,7 +711,7 @@ class MattermostChannel(BaseChannel):
     async def _remove_reaction(self, post_id: str, emoji: str) -> None:
         if not self._self_id or not emoji:
             return
-        resp = await self._http_client.delete(
+        resp = await self._require_http_client().delete(
             f"/api/v4/users/{self._self_id}/posts/{post_id}/reactions/{emoji}",
         )
         if resp.status_code >= 400:

nanobot/channels/mochat/runtime.py

@@ -1,3 +1,4 @@
+# pyright: reportConstantRedefinition=false, reportMissingTypeStubs=false
 """Mochat channel implementation using Socket.IO with HTTP polling fallback."""
 
 from __future__ import annotations
@@ -5,10 +6,11 @@ from __future__ import annotations
 import asyncio
 import json
 from collections import deque
+from collections.abc import Awaitable, Callable
 from contextlib import suppress
 from dataclasses import dataclass, field
 from datetime import datetime
-from typing import Any
+from typing import Any, cast
 
 import httpx
 from pydantic import Field
@@ -27,7 +29,7 @@ except ImportError:
     SOCKETIO_AVAILABLE = False
 
 try:
-    import msgpack  # noqa: F401
+    import msgpack  # noqa: F401  # pyright: ignore[reportUnusedImport]
     MSGPACK_AVAILABLE = True
 except ImportError:
     MSGPACK_AVAILABLE = False
@@ -57,7 +59,7 @@ class DelayState:
     """Per-target delayed message state."""
     entries: list[MochatBufferedEntry] = field(default_factory=list)
     lock: asyncio.Lock = field(default_factory=asyncio.Lock)
-    timer: asyncio.Task | None = None
+    timer: asyncio.Task[None] | None = None
 
 
 @dataclass
@@ -71,12 +73,12 @@ class MochatTarget:
 # Pure helpers
 # ---------------------------------------------------------------------------
 
-def _safe_dict(value: Any) -> dict:
+def _safe_dict(value: Any) -> dict[str, Any]:
     """Return *value* if it's a dict, else empty dict."""
-    return value if isinstance(value, dict) else {}
+    return cast(dict[str, Any], value) if isinstance(value, dict) else {}
 
 
-def _str_field(src: dict, *keys: str) -> str:
+def _str_field(src: dict[str, Any], *keys: str) -> str:
     """Return the first non-empty str value found for *keys*, stripped."""
     for k in keys:
         v = src.get(k)
@@ -100,7 +102,7 @@ def _make_synthetic_event(
         payload["authorInfo"] = _safe_dict(author_info)
     return {
         "type": "message.add",
-        "timestamp": timestamp or datetime.utcnow().isoformat(),
+        "timestamp": timestamp or datetime.utcnow().isoformat(),  # pyright: ignore[reportDeprecated]
         "payload": payload,
     }
 
@@ -141,11 +143,12 @@ def extract_mention_ids(value: Any) -> list[str]:
     if not isinstance(value, list):
         return []
     ids: list[str] = []
-    for item in value:
+    for item in cast(list[object], value):
         if isinstance(item, str):
             if item.strip():
                 ids.append(item.strip())
         elif isinstance(item, dict):
+            item = cast(dict[str, Any], item)
             for key in ("id", "userId", "_id"):
                 candidate = item.get(key)
                 if isinstance(candidate, str) and candidate.strip():
@@ -158,6 +161,7 @@ def resolve_was_mentioned(payload: dict[str, Any], agent_user_id: str) -> bool:
     """Resolve mention state from payload metadata and text fallback."""
     meta = payload.get("meta")
     if isinstance(meta, dict):
+        meta = cast(dict[str, Any], meta)
         if meta.get("mentioned") is True or meta.get("wasMentioned") is True:
             return True
         for f in ("mentions", "mentionIds", "mentionedUserIds", "mentionedUsers"):
@@ -278,7 +282,7 @@ class MochatChannel(BaseChannel):
         self._state_dir = get_runtime_subdir("mochat")
         self._cursor_path = self._state_dir / "session_cursors.json"
         self._session_cursor: dict[str, int] = {}
-        self._cursor_save_task: asyncio.Task | None = None
+        self._cursor_save_task: asyncio.Task[None] | None = None
 
         self._session_set: set[str] = set()
         self._panel_set: set[str] = set()
@@ -292,9 +296,9 @@ class MochatChannel(BaseChannel):
         self._delay_states: dict[str, DelayState] = {}
 
         self._fallback_mode = False
-        self._session_fallback_tasks: dict[str, asyncio.Task] = {}
-        self._panel_fallback_tasks: dict[str, asyncio.Task] = {}
-        self._refresh_task: asyncio.Task | None = None
+        self._session_fallback_tasks: dict[str, asyncio.Task[None]] = {}
+        self._panel_fallback_tasks: dict[str, asyncio.Task[None]] = {}
+        self._refresh_task: asyncio.Task[None] | None = None
         self._target_locks: dict[str, asyncio.Lock] = {}
 
     # ---- lifecycle ---------------------------------------------------------
@@ -352,7 +356,11 @@ class MochatChannel(BaseChannel):
 
         parts = ([msg.content.strip()] if msg.content and msg.content.strip() else [])
         if msg.media:
-            parts.extend(m for m in msg.media if isinstance(m, str) and m.strip())
+            parts.extend(
+                m
+                for m in msg.media
+                if isinstance(cast(object, m), str) and m.strip()
+            )
         content = "\n".join(parts).strip()
         if not content:
             return
@@ -404,7 +412,8 @@ class MochatChannel(BaseChannel):
             else:
                 self.logger.warning("msgpack not installed but socket_disable_msgpack=false; using JSON")
 
-        client = socketio.AsyncClient(
+        socketio_module = cast(Any, socketio)
+        client: Any = socketio_module.AsyncClient(
             reconnection=True,
             reconnection_attempts=self.config.max_retry_attempts or None,
             reconnection_delay=max(0.1, self.config.socket_reconnect_delay_ms / 1000.0),
@@ -412,7 +421,6 @@ class MochatChannel(BaseChannel):
             logger=False, engineio_logger=False, serializer=serializer,
         )
 
-        @client.event
         async def connect() -> None:
             self._ws_connected, self._ws_ready = True, False
             self.logger.info("websocket connected")
@@ -420,7 +428,6 @@ class MochatChannel(BaseChannel):
             self._ws_ready = subscribed
             await (self._stop_fallback_workers() if subscribed else self._ensure_fallback_workers())
 
-        @client.event
         async def disconnect() -> None:
             if not self._running:
                 return
@@ -428,18 +435,21 @@ class MochatChannel(BaseChannel):
             self.logger.warning("websocket disconnected")
             await self._ensure_fallback_workers()
 
-        @client.event
         async def connect_error(data: Any) -> None:
             self.logger.error("websocket connect error: {}", data)
 
-        @client.on("claw.session.events")
         async def on_session_events(payload: dict[str, Any]) -> None:
             await self._handle_watch_payload(payload, "session")
 
-        @client.on("claw.panel.events")
         async def on_panel_events(payload: dict[str, Any]) -> None:
             await self._handle_watch_payload(payload, "panel")
 
+        client.event(connect)
+        client.event(disconnect)
+        client.event(connect_error)
+        client.on("claw.session.events", on_session_events)
+        client.on("claw.panel.events", on_panel_events)
+
         for ev in ("notify:chat.inbox.append", "notify:chat.message.add",
                     "notify:chat.message.update", "notify:chat.message.recall",
                     "notify:chat.message.delete"):
@@ -463,7 +473,10 @@ class MochatChannel(BaseChannel):
             self._socket = None
             return False
 
-    def _build_notify_handler(self, event_name: str):
+    def _build_notify_handler(
+        self,
+        event_name: str,
+    ) -> Callable[[Any], Awaitable[None]]:
         async def handler(payload: Any) -> None:
             if event_name == "notify:chat.inbox.append":
                 await self._handle_notify_inbox_append(payload)
@@ -498,11 +511,20 @@ class MochatChannel(BaseChannel):
         data = ack.get("data")
         items: list[dict[str, Any]] = []
         if isinstance(data, list):
-            items = [i for i in data if isinstance(i, dict)]
+            items = [
+                cast(dict[str, Any], item)
+                for item in cast(list[object], data)
+                if isinstance(item, dict)
+            ]
         elif isinstance(data, dict):
+            data = cast(dict[str, Any], data)
             sessions = data.get("sessions")
             if isinstance(sessions, list):
-                items = [i for i in sessions if isinstance(i, dict)]
+                items = [
+                    cast(dict[str, Any], item)
+                    for item in cast(list[object], sessions)
+                    if isinstance(item, dict)
+                ]
             elif "sessionId" in data:
                 items = [data]
         for p in items:
@@ -525,7 +547,11 @@ class MochatChannel(BaseChannel):
             raw = await self._socket.call(event_name, payload, timeout=10)
         except Exception as e:
             return {"result": False, "message": str(e)}
-        return raw if isinstance(raw, dict) else {"result": True, "data": raw}
+        return (
+            cast(dict[str, Any], raw)
+            if isinstance(raw, dict)
+            else {"result": True, "data": raw}
+        )
 
     # ---- refresh / discovery -----------------------------------------------
 
@@ -558,10 +584,11 @@ class MochatChannel(BaseChannel):
             return
 
         new_ids: list[str] = []
-        for s in sessions:
-            if not isinstance(s, dict):
+        for session_value in cast(list[object], sessions):
+            if not isinstance(session_value, dict):
                 continue
-            sid = _str_field(s, "sessionId")
+            session = cast(dict[str, Any], session_value)
+            sid = _str_field(session, "sessionId")
             if not sid:
                 continue
             if sid not in self._session_set:
@@ -569,7 +596,7 @@ class MochatChannel(BaseChannel):
                 new_ids.append(sid)
                 if sid not in self._session_cursor:
                     self._cold_sessions.add(sid)
-            cid = _str_field(s, "converseId")
+            cid = _str_field(session, "converseId")
             if cid:
                 self._session_by_converse[cid] = sid
 
@@ -592,13 +619,14 @@ class MochatChannel(BaseChannel):
             return
 
         new_ids: list[str] = []
-        for p in raw_panels:
-            if not isinstance(p, dict):
+        for panel_value in cast(list[object], raw_panels):
+            if not isinstance(panel_value, dict):
                 continue
-            pt = p.get("type")
+            panel = cast(dict[str, Any], panel_value)
+            pt = panel.get("type")
             if isinstance(pt, int) and pt != 0:
                 continue
-            pid = _str_field(p, "id", "_id")
+            pid = _str_field(panel, "id", "_id")
             if pid and pid not in self._panel_set:
                 self._panel_set.add(pid)
                 new_ids.append(pid)
@@ -658,16 +686,19 @@ class MochatChannel(BaseChannel):
                 })
                 msgs = resp.get("messages")
                 if isinstance(msgs, list):
-                    for m in reversed(msgs):
-                        if not isinstance(m, dict):
+                    for message_value in reversed(cast(list[object], msgs)):
+                        if not isinstance(message_value, dict):
                             continue
+                        message = cast(dict[str, Any], message_value)
                         evt = _make_synthetic_event(
-                            message_id=str(m.get("messageId") or ""),
-                            author=str(m.get("author") or ""),
-                            content=m.get("content"),
-                            meta=m.get("meta"), group_id=str(resp.get("groupId") or ""),
-                            converse_id=panel_id, timestamp=m.get("createdAt"),
-                            author_info=m.get("authorInfo"),
+                            message_id=str(message.get("messageId") or ""),
+                            author=str(message.get("author") or ""),
+                            content=message.get("content"),
+                            meta=message.get("meta"),
+                            group_id=str(resp.get("groupId") or ""),
+                            converse_id=panel_id,
+                            timestamp=message.get("createdAt"),
+                            author_info=message.get("authorInfo"),
                         )
                         await self._process_inbound_event(panel_id, evt, "panel")
             except asyncio.CancelledError:
@@ -679,7 +710,7 @@ class MochatChannel(BaseChannel):
     # ---- inbound event processing ------------------------------------------
 
     async def _handle_watch_payload(self, payload: dict[str, Any], target_kind: str) -> None:
-        if not isinstance(payload, dict):
+        if not isinstance(cast(object, payload), dict):
             return
         target_id = _str_field(payload, "sessionId")
         if not target_id:
@@ -699,9 +730,10 @@ class MochatChannel(BaseChannel):
                 self._cold_sessions.discard(target_id)
                 return
 
-            for event in raw_events:
-                if not isinstance(event, dict):
+            for event_value in cast(list[object], raw_events):
+                if not isinstance(event_value, dict):
                     continue
+                event = cast(dict[str, Any], event_value)
                 seq = event.get("seq")
                 if target_kind == "session" and isinstance(seq, int) and seq > self._session_cursor.get(target_id, prev):
                     self._mark_session_cursor(target_id, seq)
@@ -712,6 +744,7 @@ class MochatChannel(BaseChannel):
         payload = event.get("payload")
         if not isinstance(payload, dict):
             return
+        payload = cast(dict[str, Any], payload)
 
         author = _str_field(payload, "author")
         if not author or (self.config.agent_user_id and author == self.config.agent_user_id):
@@ -821,6 +854,7 @@ class MochatChannel(BaseChannel):
     async def _handle_notify_chat_message(self, payload: Any) -> None:
         if not isinstance(payload, dict):
             return
+        payload = cast(dict[str, Any], payload)
         group_id = _str_field(payload, "groupId")
         panel_id = _str_field(payload, "converseId", "panelId")
         if not group_id or not panel_id:
@@ -838,11 +872,15 @@ class MochatChannel(BaseChannel):
         await self._process_inbound_event(panel_id, evt, "panel")
 
     async def _handle_notify_inbox_append(self, payload: Any) -> None:
-        if not isinstance(payload, dict) or payload.get("type") != "message":
+        if not isinstance(payload, dict):
+            return
+        payload = cast(dict[str, Any], payload)
+        if payload.get("type") != "message":
             return
         detail = payload.get("payload")
         if not isinstance(detail, dict):
             return
+        detail = cast(dict[str, Any], detail)
         if _str_field(detail, "groupId"):
             return
         converse_id = _str_field(detail, "converseId")
@@ -886,9 +924,14 @@ class MochatChannel(BaseChannel):
         except Exception as e:
             self.logger.warning("Failed to read cursor file: {}", e)
             return
-        cursors = data.get("cursors") if isinstance(data, dict) else None
+        data_object = cast(object, data)
+        cursors = (
+            cast(dict[str, Any], data_object).get("cursors")
+            if isinstance(data_object, dict)
+            else None
+        )
         if isinstance(cursors, dict):
-            for sid, cur in cursors.items():
+            for sid, cur in cast(dict[object, object], cursors).items():
                 if isinstance(sid, str) and isinstance(cur, int) and cur >= 0:
                     self._session_cursor[sid] = cur
 
@@ -896,7 +939,8 @@ class MochatChannel(BaseChannel):
         try:
             self._state_dir.mkdir(parents=True, exist_ok=True)
             self._cursor_path.write_text(json.dumps({
-                "schemaVersion": 1, "updatedAt": datetime.utcnow().isoformat(),
+                "schemaVersion": 1,
+                "updatedAt": datetime.utcnow().isoformat(),  # pyright: ignore[reportDeprecated]
                 "cursors": self._session_cursor,
             }, ensure_ascii=False, indent=2) + "\n", "utf-8")
         except Exception as e:
@@ -917,13 +961,22 @@ class MochatChannel(BaseChannel):
             parsed = response.json()
         except Exception:
             parsed = response.text
-        if isinstance(parsed, dict) and isinstance(parsed.get("code"), int):
-            if parsed["code"] != 200:
-                msg = str(parsed.get("message") or parsed.get("name") or "request failed")
-                raise RuntimeError(f"Mochat API error: {msg} (code={parsed['code']})")
-            data = parsed.get("data")
-            return data if isinstance(data, dict) else {}
-        return parsed if isinstance(parsed, dict) else {}
+        if isinstance(parsed, dict):
+            parsed_dict = cast(dict[str, Any], parsed)
+            if isinstance(parsed_dict.get("code"), int):
+                if parsed_dict["code"] != 200:
+                    msg = str(
+                        parsed_dict.get("message")
+                        or parsed_dict.get("name")
+                        or "request failed"
+                    )
+                    raise RuntimeError(
+                        f"Mochat API error: {msg} (code={parsed_dict['code']})"
+                    )
+                data = parsed_dict.get("data")
+                return cast(dict[str, Any], data) if isinstance(data, dict) else {}
+            return parsed_dict
+        return {}
 
     async def _api_send(self, path: str, id_key: str, id_val: str,
                         content: str, reply_to: str | None, group_id: str | None = None) -> dict[str, Any]:
@@ -937,7 +990,7 @@ class MochatChannel(BaseChannel):
 
     @staticmethod
     def _read_group_id(metadata: dict[str, Any]) -> str | None:
-        if not isinstance(metadata, dict):
+        if not isinstance(cast(object, metadata), dict):
             return None
         value = metadata.get("group_id") or metadata.get("groupId")
         return value.strip() if isinstance(value, str) and value.strip() else None

nanobot/channels/msteams/runtime.py

@@ -23,7 +23,8 @@ import time
 from contextlib import contextmanager, suppress
 from dataclasses import dataclass
 from http.server import BaseHTTPRequestHandler, ThreadingHTTPServer
-from typing import TYPE_CHECKING, Any
+from pathlib import Path
+from typing import TYPE_CHECKING, Any, Generator, cast
 from urllib.parse import urlparse
 
 try:  # pragma: no cover - Windows fallback path
@@ -47,9 +48,11 @@ MSTEAMS_AVAILABLE = (
 
 if TYPE_CHECKING:
     import jwt
+    from jwt.algorithms import RSAAlgorithm
 
 if MSTEAMS_AVAILABLE:
     import jwt
+    from jwt.algorithms import RSAAlgorithm
 
 MSTEAMS_REF_TTL_DAYS = 30
 MSTEAMS_WEBCHAT_HOST = "webchat.botframework.com"
@@ -182,9 +185,10 @@ class MSTeamsChannel(BaseChannel):
                 auth_header = self.headers.get("Authorization", "")
                 if channel.config.validate_inbound_auth:
                     try:
+                        loop = cast(asyncio.AbstractEventLoop, channel._loop)
                         fut = asyncio.run_coroutine_threadsafe(
                             channel._validate_inbound_auth(auth_header, payload),
-                            channel._loop,
+                            loop,
                         )
                         fut.result(timeout=15)
                     except Exception as e:
@@ -195,9 +199,10 @@ class MSTeamsChannel(BaseChannel):
                         self.wfile.write(b'{"error":"unauthorized"}')
                         return
                 try:
+                    loop = cast(asyncio.AbstractEventLoop, channel._loop)
                     fut = asyncio.run_coroutine_threadsafe(
                         channel._handle_activity(payload),
-                        channel._loop,
+                        loop,
                     )
                     fut.result(timeout=15)
                 except Exception as e:
@@ -269,7 +274,7 @@ class MSTeamsChannel(BaseChannel):
             "text": msg.content or " ",
         }
         if use_thread_reply:
-            payload["replyToId"] = ref.activity_id
+            payload["replyToId"] = cast(str, ref.activity_id)
 
         try:
             resp = await self._http.post(base_url, headers=headers, json=payload)
@@ -285,10 +290,10 @@ class MSTeamsChannel(BaseChannel):
         if activity.get("type") != "message":
             return
 
-        conversation = activity.get("conversation") or {}
-        from_user = activity.get("from") or {}
-        recipient = activity.get("recipient") or {}
-        channel_data = activity.get("channelData") or {}
+        conversation = cast(dict[str, Any], activity.get("conversation") or {})
+        from_user = cast(dict[str, Any], activity.get("from") or {})
+        recipient = cast(dict[str, Any], activity.get("recipient") or {})
+        channel_data = cast(dict[str, Any], activity.get("channelData") or {})
 
         sender_id = str(from_user.get("aadObjectId") or from_user.get("id") or "").strip()
         conversation_id = str(conversation.get("id") or "").strip()
@@ -336,7 +341,16 @@ class MSTeamsChannel(BaseChannel):
                 bot_id=str(recipient.get("id") or "") or None,
                 activity_id=activity_id or None,
                 conversation_type=conversation_type or None,
-                tenant_id=str((channel_data.get("tenant") or {}).get("id") or "") or None,
+                tenant_id=(
+                    str(
+                        cast(
+                            dict[str, Any],
+                            channel_data.get("tenant") or {},
+                        ).get("id")
+                        or ""
+                    )
+                    or None
+                ),
                 updated_at=time.time(),
             )
             self._save_refs_locked()
@@ -361,7 +375,7 @@ class MSTeamsChannel(BaseChannel):
         text = self._strip_possible_bot_mention(text)
         text = self._normalize_html_whitespace(text)
 
-        channel_data = activity.get("channelData") or {}
+        channel_data = cast(dict[str, Any], activity.get("channelData") or {})
         reply_to_id = str(activity.get("replyToId") or "").strip()
         normalized_preview = html.unescape(text).replace("&rsquo", "’").strip()
         normalized_preview = normalized_preview.replace("\xa0", " ")
@@ -473,15 +487,15 @@ class MSTeamsChannel(BaseChannel):
             raise ValueError("missing token kid")
 
         jwks = await self._get_botframework_jwks()
-        keys = jwks.get("keys") or []
+        keys = cast(list[dict[str, Any]], jwks.get("keys") or [])
         jwk = next((key for key in keys if key.get("kid") == kid), None)
         if not jwk:
             raise ValueError(f"signing key not found for kid={kid}")
 
-        public_key = jwt.algorithms.RSAAlgorithm.from_jwk(json.dumps(jwk))
+        public_key = RSAAlgorithm.from_jwk(json.dumps(jwk))
         claims = jwt.decode(
             token,
-            key=public_key,
+            key=cast(Any, public_key),
             algorithms=["RS256"],
             audience=self.config.app_id,
             issuer="https://api.botframework.com",
@@ -509,9 +523,10 @@ class MSTeamsChannel(BaseChannel):
 
         resp = await self._http.get(self._botframework_openid_config_url)
         resp.raise_for_status()
-        self._botframework_openid_config = resp.json()
+        openid_config = cast(dict[str, Any], resp.json())
+        self._botframework_openid_config = openid_config
         self._botframework_openid_config_expires_at = now + 3600
-        return self._botframework_openid_config
+        return openid_config
 
     async def _get_botframework_jwks(self) -> dict[str, Any]:
         """Fetch and cache Bot Framework JWKS."""
@@ -530,36 +545,38 @@ class MSTeamsChannel(BaseChannel):
 
         resp = await self._http.get(jwks_uri)
         resp.raise_for_status()
-        self._botframework_jwks = resp.json()
+        jwks = cast(dict[str, Any], resp.json())
+        self._botframework_jwks = jwks
         self._botframework_jwks_expires_at = now + 3600
-        return self._botframework_jwks
+        return jwks
 
     @staticmethod
-    def _safe_float(value: Any) -> float | None:
+    def _safe_float(value: object) -> float | None:
         try:
-            out = float(value)
+            out = float(cast(Any, value))
             if out > 0:
                 return out
         except (TypeError, ValueError):
             return None
         return None
 
-    def _normalize_ref_record(self, value: Any) -> ConversationRef | None:
+    def _normalize_ref_record(self, value: object) -> ConversationRef | None:
         """Normalize a stored ref record from legacy/current schema."""
         if not isinstance(value, dict):
             return None
-        service_url = str(value.get("service_url") or "").strip()
-        conversation_id = str(value.get("conversation_id") or "").strip()
+        record = cast(dict[str, Any], value)
+        service_url = str(record.get("service_url") or "").strip()
+        conversation_id = str(record.get("conversation_id") or "").strip()
         if not service_url or not conversation_id:
             return None
         return ConversationRef(
             service_url=service_url,
             conversation_id=conversation_id,
-            bot_id=str(value.get("bot_id") or "") or None,
-            activity_id=str(value.get("activity_id") or "") or None,
-            conversation_type=str(value.get("conversation_type") or "") or None,
-            tenant_id=str(value.get("tenant_id") or "") or None,
-            updated_at=self._safe_float(value.get("updated_at")),
+            bot_id=str(record.get("bot_id") or "") or None,
+            activity_id=str(record.get("activity_id") or "") or None,
+            conversation_type=str(record.get("conversation_type") or "") or None,
+            tenant_id=str(record.get("tenant_id") or "") or None,
+            updated_at=self._safe_float(cast(object, record.get("updated_at"))),
         )
 
     def _load_refs_raw(self) -> tuple[dict[str, Any], dict[str, Any], bool]:
@@ -570,17 +587,19 @@ class MSTeamsChannel(BaseChannel):
 
         if self._refs_path.exists():
             try:
-                loaded = json.loads(self._refs_path.read_text(encoding="utf-8"))
+                loaded: object = json.loads(self._refs_path.read_text(encoding="utf-8"))
                 if isinstance(loaded, dict):
-                    main_data = loaded
+                    main_data = cast(dict[str, Any], loaded)
             except Exception as e:
                 self.logger.warning("Failed to load conversation refs: {}", e)
 
         if meta_exists:
             try:
-                loaded_meta = json.loads(self._refs_meta_path.read_text(encoding="utf-8"))
+                loaded_meta: object = json.loads(
+                    self._refs_meta_path.read_text(encoding="utf-8")
+                )
                 if isinstance(loaded_meta, dict):
-                    meta_data = loaded_meta
+                    meta_data = cast(dict[str, Any], loaded_meta)
             except Exception as e:
                 self.logger.warning("Failed to load conversation refs metadata: {}", e)
 
@@ -599,10 +618,11 @@ class MSTeamsChannel(BaseChannel):
             if not ref:
                 continue
 
-            meta_entry = meta_data.get(key) if isinstance(meta_data, dict) else None
-            meta_ts = None
+            meta_entry = cast(object, meta_data.get(key))
+            meta_ts: float | None = None
             if isinstance(meta_entry, dict):
-                meta_ts = self._safe_float(meta_entry.get("updated_at"))
+                meta_record = cast(dict[str, Any], meta_entry)
+                meta_ts = self._safe_float(cast(object, meta_record.get("updated_at")))
             elif meta_entry is not None:
                 meta_ts = self._safe_float(meta_entry)
 
@@ -623,7 +643,7 @@ class MSTeamsChannel(BaseChannel):
         return self._load_refs_from_disk()
 
     @contextmanager
-    def _refs_file_lock(self):
+    def _refs_file_lock(self) -> Generator[None, None, None]:
         """Cross-process lock while merging and writing refs state."""
         self._refs_path.parent.mkdir(parents=True, exist_ok=True)
         lock_fp = self._refs_lock_path.open("a+", encoding="utf-8")
@@ -742,7 +762,7 @@ class MSTeamsChannel(BaseChannel):
             if persist:
                 self._save_refs_locked()
 
-    def _write_json_atomically(self, path, data: dict[str, Any]) -> None:
+    def _write_json_atomically(self, path: Path, data: dict[str, Any]) -> None:
         """Write refs JSON atomically to reduce corruption risk during crashes."""
         payload = json.dumps(data, indent=2)
         tmp_path: str | None = None
@@ -816,7 +836,8 @@ class MSTeamsChannel(BaseChannel):
         }
         resp = await self._http.post(token_url, data=data)
         resp.raise_for_status()
-        payload = resp.json()
-        self._token = payload["access_token"]
+        payload = cast(dict[str, Any], resp.json())
+        token = cast(str, payload["access_token"])
+        self._token = token
         self._token_expires_at = now + int(payload.get("expires_in", 3600))
-        return self._token
+        return token

nanobot/channels/napcat/runtime.py

@@ -11,7 +11,7 @@ import time
 import uuid
 from collections import deque
 from pathlib import Path
-from typing import Annotated, Any, Literal
+from typing import Annotated, Any, Literal, cast
 
 import aiohttp
 from loguru import logger
@@ -103,7 +103,7 @@ class NapcatChannel(BaseChannel):
                 await asyncio.sleep(next(backoff, 30))
 
     async def _run_once(self) -> None:
-        headers = []
+        headers: list[tuple[str, str]] = []
         if self.config.access_token:
             headers.append(("Authorization", f"Bearer {self.config.access_token}"))
 
@@ -132,12 +132,17 @@ class NapcatChannel(BaseChannel):
                         payload = json.loads(raw)
                     except json.JSONDecodeError:
                         continue
-                    if isinstance(payload, dict) and payload.get("echo") == echo:
-                        data = payload.get("data") or {}
+                    if isinstance(payload, dict):
+                        login_payload = cast(dict[str, Any], payload)
+                    else:
+                        login_payload = None
+                    if login_payload is not None and login_payload.get("echo") == echo:
+                        data = login_payload.get("data")
+                        login_data = cast(dict[str, Any], data) if isinstance(data, dict) else {}
                         logger.info(
                             "napcat: logged in as {} (user_id={})",
-                            data.get("nickname"),
-                            data.get("user_id"),
+                            login_data.get("nickname"),
+                            login_data.get("user_id"),
                         )
                         break
                     await self._dispatch_frame(raw)
@@ -189,26 +194,27 @@ class NapcatChannel(BaseChannel):
             return
         if not isinstance(payload, dict):
             return
+        frame = cast(dict[str, Any], payload)
 
         # Action response: identified by `echo` and absence of post_type.
-        if "echo" in payload and payload.get("post_type") is None:
-            echo = payload.get("echo")
+        if "echo" in frame and frame.get("post_type") is None:
+            echo = frame.get("echo")
             fut = self._pending.pop(echo, None) if isinstance(echo, str) else None
             if fut and not fut.done():
-                fut.set_result(payload)
+                fut.set_result(frame)
             return
 
-        if (sid := payload.get("self_id")) is not None:
+        if (sid := frame.get("self_id")) is not None:
             try:
                 self._self_id = int(sid)
             except (TypeError, ValueError):
                 pass
 
-        post_type = payload.get("post_type")
+        post_type = frame.get("post_type")
         if post_type == "message":
-            self._create_background_task(self._on_message(payload), "message")
+            self._create_background_task(self._on_message(frame), "message")
         elif post_type == "notice":
-            self._create_background_task(self._on_notice(payload), "notice")
+            self._create_background_task(self._on_notice(frame), "notice")
 
     def _create_background_task(self, coro: Any, kind: str) -> None:
         task = asyncio.create_task(coro)
@@ -249,7 +255,8 @@ class NapcatChannel(BaseChannel):
             if local := await self._download_image(info):
                 media_paths.append(local)
 
-        sender = ev.get("sender") or {}
+        sender_raw = ev.get("sender")
+        sender = cast(dict[str, Any], sender_raw) if isinstance(sender_raw, dict) else {}
         nickname = sender.get("card") or sender.get("nickname")
 
         if message_type == "group":
@@ -270,7 +277,7 @@ class NapcatChannel(BaseChannel):
             chat_id = f"group:{group_id}"
             content = self._format_group_content(
                 text=text,
-                nickname=nickname,
+                nickname=cast(str, nickname),
                 user_id=user_id,
             )
         else:
@@ -299,7 +306,7 @@ class NapcatChannel(BaseChannel):
         # segment rather than parsing CQ codes — that path is fragile and
         # users can configure napcat to emit arrays.
         if isinstance(message, list):
-            return [seg for seg in message if isinstance(seg, dict)]
+            return [cast(dict[str, Any], seg) for seg in cast(list[Any], message) if isinstance(seg, dict)]
         if isinstance(message, str) and message:
             return [{"type": "text", "data": {"text": message}}]
         return []
@@ -315,7 +322,8 @@ class NapcatChannel(BaseChannel):
 
         for seg in segments:
             stype = seg.get("type")
-            data = seg.get("data") or {}
+            raw_data = seg.get("data")
+            data = cast(dict[str, Any], raw_data) if isinstance(raw_data, dict) else {}
             if stype == "text":
                 if txt := data.get("text"):
                     parts.append(str(txt))
@@ -455,7 +463,8 @@ class NapcatChannel(BaseChannel):
             params["user_id"] = int(target)
 
         resp = await self._call_action("send_msg", params)
-        data = resp.get("data") or {}
+        raw_data = resp.get("data")
+        data = cast(dict[str, Any], raw_data) if isinstance(raw_data, dict) else {}
         if (mid := data.get("message_id")) is not None:
             self._bot_outbound_ids.append(int(mid))
 

nanobot/channels/plugin.py

@@ -7,7 +7,7 @@ import re
 from dataclasses import dataclass
 from functools import lru_cache
 from importlib.resources import files
-from typing import TYPE_CHECKING, Any
+from typing import TYPE_CHECKING, Any, cast
 
 from packaging.requirements import InvalidRequirement, Requirement
 
@@ -49,12 +49,12 @@ class ChannelPlugin:
         _target_parts(self.runtime, label="runtime")
         if self.connector is not None:
             _target_parts(self.connector, label="connector")
-        if self.setup is not None and not isinstance(self.setup, ChannelSetupSpec):
+        if self.setup is not None and not isinstance(cast(object, self.setup), ChannelSetupSpec):
             raise TypeError("channel plugin setup must be a ChannelSetupSpec or None")
-        if not isinstance(self.management, ChannelManagementSpec):
+        if not isinstance(cast(object, self.management), ChannelManagementSpec):
             raise TypeError("channel plugin management must be a ChannelManagementSpec")
-        if not isinstance(self.dependencies, tuple) or not all(
-            isinstance(requirement, str) and requirement.strip()
+        if not isinstance(cast(object, self.dependencies), tuple) or not all(
+            isinstance(cast(object, requirement), str) and requirement.strip()
             for requirement in self.dependencies
         ):
             raise TypeError("channel plugin dependencies must be a tuple of requirements")

nanobot/channels/qq/runtime.py

@@ -16,6 +16,8 @@ Notes:
 - Attachment structures differ across botpy versions; we try multiple field candidates.
 """
 
+# pyright: reportConstantRedefinition=false, reportMissingTypeStubs=false, reportPrivateUsage=false
+
 from __future__ import annotations
 
 import asyncio
@@ -27,7 +29,7 @@ import time
 from collections import deque
 from contextlib import suppress
 from pathlib import Path
-from typing import TYPE_CHECKING, Any, Literal
+from typing import Any, BinaryIO, Literal, cast
 from urllib.parse import unquote, urlparse
 
 import aiohttp
@@ -58,11 +60,6 @@ except ImportError:  # pragma: no cover
     BotWebSocket = None
     Route = None
 
-if TYPE_CHECKING:
-    from botpy.message import BaseMessage, C2CMessage, GroupMessage
-    from botpy.types.message import Media
-
-
 # QQ rich media file_type: 1=image, 4=file
 # (2=voice, 3=video are restricted; we only use image vs file)
 QQ_FILE_TYPE_IMAGE = 1
@@ -118,30 +115,34 @@ def _is_network_error(exc: BaseException) -> bool:
     )
 
 
-def _make_bot_class(channel: QQChannel) -> type[botpy.Client]:
+def _make_bot_class(channel: QQChannel) -> type[Any]:
     """Create a botpy client with per-session reconnect backoff."""
-    intents = botpy.Intents(public_messages=True, direct_message=True)
+    botpy_sdk = cast(Any, botpy)
+    intents = botpy_sdk.Intents(public_messages=True, direct_message=True)
 
-    class _Bot(botpy.Client):
+    class _Bot(botpy_sdk.Client):
         def __init__(self):
             # Disable botpy's file log — nanobot uses loguru; default "botpy.log" fails on read-only fs
-            super().__init__(intents=intents, ext_handlers=False)
+            super().__init__(  # pyright: ignore[reportUnknownMemberType]
+                intents=intents,
+                ext_handlers=False,
+            )
             self._ws_backoff: dict[int, int] = {}
             self._ws_retry_at: dict[int, float] = {}
 
         async def on_ready(self):
             logger.info("QQ bot ready: {}", self.robot.name)
 
-        async def on_c2c_message_create(self, message: C2CMessage):
+        async def on_c2c_message_create(self, message: object) -> None:
             await channel._on_message(message, is_group=False)
 
-        async def on_group_at_message_create(self, message: GroupMessage):
+        async def on_group_at_message_create(self, message: object) -> None:
             await channel._on_message(message, is_group=True)
 
-        async def on_direct_message_create(self, message):
+        async def on_direct_message_create(self, message: object) -> None:
             await channel._on_message(message, is_group=False)
 
-        async def bot_connect(self, session):
+        async def bot_connect(self, session: object) -> None:
             """Connect a botpy session with exponential retry backoff."""
             session_id = id(session)
             retry_at = self._ws_retry_at.pop(session_id, None)
@@ -150,7 +151,8 @@ def _make_bot_class(channel: QQChannel) -> type[botpy.Client]:
                 if remaining > 0:
                     await asyncio.sleep(remaining)
 
-            client = BotWebSocket(session, self._connection)
+            websocket_class = cast(Any, BotWebSocket)
+            client = websocket_class(session, self._connection)
             backoff = self._ws_backoff.get(session_id, _RECONNECT_BACKOFF_START)
             try:
                 await client.ws_connect()
@@ -207,7 +209,7 @@ class QQChannel(BaseChannel):
         super().__init__(config, bus)
         self.config: QQConfig = config
 
-        self._client: botpy.Client | None = None
+        self._client: Any | None = None
         self._http: aiohttp.ClientSession | None = None
 
         self._processed_ids: deque[str] = deque(maxlen=1000)
@@ -260,7 +262,8 @@ class QQChannel(BaseChannel):
         max_backoff = 300
         while self._running:
             try:
-                await self._client.start(appid=self.config.app_id, secret=self.config.secret)
+                client = cast(Any, self._client)
+                await client.start(appid=self.config.app_id, secret=self.config.secret)
                 backoff = 5
             except Exception as e:
                 if _is_network_error(e):
@@ -490,7 +493,7 @@ class QQChannel(BaseChannel):
         file_data: str,
         file_name: str | None = None,
         srv_send_msg: bool = False,
-    ) -> Media:
+    ) -> dict[str, Any]:
         """Upload base64-encoded file and return Media object."""
         if not self._client:
             raise RuntimeError("QQ client not initialized")
@@ -514,39 +517,44 @@ class QQChannel(BaseChannel):
         if file_type != QQ_FILE_TYPE_IMAGE and file_name:
             payload["file_name"] = file_name
 
-        route = Route("POST", endpoint, **{id_key: chat_id})
-        result = await self._client.api._http.request(route, json=payload)
+        route_class = cast(Any, Route)
+        route = route_class("POST", endpoint, **{id_key: chat_id})
+        client = self._client
+        result: object = await client.api._http.request(route, json=payload)
 
         # Extract only the file_info field to avoid extra fields (file_uuid, ttl, etc.)
         # that may confuse QQ client when sending the media object.
         if isinstance(result, dict) and "file_info" in result:
-            return {"file_info": result["file_info"]}
-        return result
+            result_data = cast(dict[str, Any], result)
+            return {"file_info": result_data["file_info"]}
+        return cast(dict[str, Any], result)
 
     # ---------------------------
     # Inbound (receive)
     # ---------------------------
 
-    async def _on_message(self, data: C2CMessage | GroupMessage, is_group: bool = False) -> None:
+    async def _on_message(self, data: object, is_group: bool = False) -> None:
         """Parse inbound message, download attachments, and publish to the bus."""
         try:
+            message = cast(Any, data)
             if is_group:
-                chat_id = data.group_openid
-                user_id = data.author.member_openid
+                chat_id = cast(str, message.group_openid)
+                user_id = cast(str, message.author.member_openid)
                 chat_type = "group"
             else:
                 chat_id = str(
-                    getattr(data.author, "id", None)
-                    or getattr(data.author, "user_openid", "unknown")
+                    getattr(message.author, "id", None)
+                    or getattr(message.author, "user_openid", "unknown")
                 )
                 user_id = chat_id
                 chat_type = "c2c"
 
-            content = (data.content or "").strip()
+            content = str(message.content or "").strip()
 
-            if data.id in self._processed_ids:
+            message_id = cast(str, message.id)
+            if message_id in self._processed_ids:
                 return
-            self._processed_ids.append(data.id)
+            self._processed_ids.append(message_id)
             self._chat_type_cache[chat_id] = chat_type
 
             # Early permission check — avoid attachment downloads and ack side effects
@@ -564,7 +572,10 @@ class QQChannel(BaseChannel):
 
             # the data used by tests don't contain attachments property
             # so we use getattr with a default of [] to avoid AttributeError in tests
-            attachments = getattr(data, "attachments", None) or []
+            attachments = cast(
+                list[object],
+                getattr(message, "attachments", None) or [],
+            )
             media_paths, recv_lines, att_meta = await self._handle_attachments(attachments)
 
             # Compose content that always contains actionable saved paths
@@ -587,7 +598,7 @@ class QQChannel(BaseChannel):
                     await self._send_text_only(
                         chat_id=chat_id,
                         is_group=is_group,
-                        msg_id=data.id,
+                        msg_id=message_id,
                         content=self.config.ack_message,
                     )
                 except Exception:
@@ -599,17 +610,20 @@ class QQChannel(BaseChannel):
                 content=content,
                 media=media_paths if media_paths else None,
                 metadata={
-                    "message_id": data.id,
+                    "message_id": message_id,
                     "attachments": att_meta,
                 },
                 is_dm=not is_group,
             )
         except Exception:
-            self.logger.exception("Error handling inbound message id={}", getattr(data, "id", "?"))
+            self.logger.exception(
+                "Error handling inbound message id={}",
+                getattr(data, "id", "?"),
+            )
 
     async def _handle_attachments(
         self,
-        attachments: list[BaseMessage._Attachments],
+        attachments: list[object],
     ) -> tuple[list[str], list[str], list[dict[str, Any]]]:
         """Extract, download (chunked), and format attachments for agent consumption."""
         media_paths: list[str] = []
@@ -718,9 +732,11 @@ class QQChannel(BaseChannel):
                     1024 * 1024, int(self.config.download_max_bytes or (200 * 1024 * 1024))
                 )
 
-                def _open_tmp():
-                    tmp_path.parent.mkdir(parents=True, exist_ok=True)
-                    return open(tmp_path, "wb")  # noqa: SIM115
+                active_tmp_path = tmp_path
+
+                def _open_tmp() -> BinaryIO:
+                    active_tmp_path.parent.mkdir(parents=True, exist_ok=True)
+                    return active_tmp_path.open("wb")  # noqa: SIM115
 
                 f = await asyncio.to_thread(_open_tmp)
                 try:
@@ -740,7 +756,7 @@ class QQChannel(BaseChannel):
                     await asyncio.to_thread(f.close)
 
                 # Atomic rename
-                await asyncio.to_thread(os.replace, tmp_path, target)
+                await asyncio.to_thread(os.replace, active_tmp_path, target)
                 tmp_path = None  # mark as moved
                 self.logger.info("file saved: {}", str(target))
                 return str(target)

nanobot/channels/signal/runtime.py

@@ -12,7 +12,7 @@ from collections.abc import AsyncIterator, Callable
 from contextlib import asynccontextmanager
 from dataclasses import dataclass, field
 from pathlib import Path
-from typing import Any
+from typing import Any, TypedDict, cast
 
 import httpx
 from pydantic import Field, computed_field, field_validator
@@ -53,7 +53,7 @@ _SIG_TOKEN_RE = re.compile(r"\x00C(\d+)\x00")
 # stripper needs a fixed, narrow subset (no single-asterisk italic, no
 # single-tilde strikethrough) and benefits from each pattern's group 1 being
 # the content directly.
-_SIG_CELL_STRIP_PATTERNS: tuple[tuple[re.Pattern, str], ...] = (
+_SIG_CELL_STRIP_PATTERNS: tuple[tuple[re.Pattern[str], str], ...] = (
     (re.compile(r"\*\*(.+?)\*\*"), r"\1"),
     (re.compile(r"__(.+?)__"), r"\1"),
     (re.compile(r"~~(.+?)~~"), r"\1"),
@@ -61,6 +61,27 @@ _SIG_CELL_STRIP_PATTERNS: tuple[tuple[re.Pattern, str], ...] = (
 )
 
 
+def _as_json_object(value: object) -> dict[str, Any] | None:
+    """Return an untrusted JSON value only when it is an object."""
+    if isinstance(value, dict):
+        return cast(dict[str, Any], value)
+    return None
+
+
+def _as_json_object_list(value: object) -> list[dict[str, Any]]:
+    """Return the object members of an untrusted JSON array."""
+    if not isinstance(value, list):
+        return []
+    return [cast(dict[str, Any], item) for item in cast(list[object], value) if isinstance(item, dict)]
+
+
+class _BufferedMessage(TypedDict):
+    sender_name: str
+    sender_number: str
+    content: str
+    timestamp: int | None
+
+
 def _utf16_len(s: str) -> int:
     """UTF-16 code-unit length, matching Signal BodyRange semantics."""
     return len(s.encode("utf-16-le")) // 2
@@ -118,7 +139,7 @@ def _markdown_to_signal(text: str) -> tuple[str, list[str]]:
     # so they're protected from inline-style processing.
     protected: list[str] = []
 
-    def save_code(m: re.Match) -> str:
+    def save_code(m: re.Match[str]) -> str:
         protected.append(m.group(1))
         return f"\x00C{len(protected) - 1}\x00"
 
@@ -149,8 +170,8 @@ def _markdown_to_signal(text: str) -> tuple[str, list[str]]:
     runs: list[_Run] = [_Run(text)]
 
     def transform(
-        pattern: re.Pattern,
-        make_runs: Callable[[re.Match, frozenset[str]], list[_Run]],
+        pattern: re.Pattern[str],
+        make_runs: Callable[[re.Match[str], frozenset[str]], list[_Run]],
     ) -> None:
         new_runs: list[_Run] = []
         for run in runs:
@@ -189,7 +210,7 @@ def _markdown_to_signal(text: str) -> tuple[str, list[str]]:
     transform(_SIG_OLIST_RE, lambda m, s: [_Run(m.group(1) + ". ", s)])
 
     # Links → "text (url)" or bare url when text equals url.
-    def _link_runs(m: re.Match, s: frozenset) -> list[_Run]:
+    def _link_runs(m: re.Match[str], s: frozenset[str]) -> list[_Run]:
         link_text, url = m.group(1), m.group(2)
 
         def _norm(u: str) -> str:
@@ -357,15 +378,15 @@ class SignalChannel(BaseChannel):
         self.config: SignalConfig = config
         self._http: httpx.AsyncClient | None = None
         self._request_id = 0
-        self._sse_task: asyncio.Task | None = None
-        self._typing_tasks: dict[str, asyncio.Task] = {}
+        self._sse_task: asyncio.Task[None] | None = None
+        self._typing_tasks: dict[str, asyncio.Task[None]] = {}
         self._typing_uuid_warnings: set[str] = set()
         self._account_id_aliases: set[str] = set()
         self._remember_account_id_alias(self.config.phone_number)
 
         # Rolling message buffer for group context (group_id -> deque of messages)
         # Each message is a dict with: sender_name, sender_number, content, timestamp
-        self._group_buffers: dict[str, deque] = {}
+        self._group_buffers: dict[str, deque[_BufferedMessage]] = {}
 
     def is_allowed(self, sender_id: str) -> bool:
         """Override base check to normalize and split pipe-joined identifiers.
@@ -409,6 +430,7 @@ class SignalChannel(BaseChannel):
         metadata: dict[str, Any] | None = None,
         session_key: str | None = None,
         is_dm: bool = False,
+        authorization_id: str | None = None,
     ) -> None:
         """Handle an inbound message whose policy has already been checked.
 
@@ -418,6 +440,7 @@ class SignalChannel(BaseChannel):
         ``super()._handle_message`` instead, which goes through
         ``is_allowed`` and issues a pairing code.
         """
+        del authorization_id
         meta = metadata or {}
         if self.supports_streaming:
             meta = {**meta, "_wants_stream": True}
@@ -594,7 +617,7 @@ class SignalChannel(BaseChannel):
                 self.logger.info("Subscribed to Signal messages via SSE")
 
                 # Buffer for accumulating SSE data across multiple lines
-                event_buffer = []
+                event_buffer: list[str] = []
 
                 async for line in response.aiter_lines():
                     if not self._running:
@@ -605,7 +628,7 @@ class SignalChannel(BaseChannel):
                         self.logger.debug("SSE line received: {}", line[:200])
 
                     # SSE format handling
-                    if isinstance(line, str):
+                    if isinstance(line, str):  # pyright: ignore[reportUnnecessaryIsInstance]
                         # Empty line signals end of event
                         if not line or line == ":":
                             if event_buffer:
@@ -613,7 +636,10 @@ class SignalChannel(BaseChannel):
                                 data_str = ""
                                 try:
                                     data_str = "\n".join(event_buffer)
-                                    data = json.loads(data_str)
+                                    data = _as_json_object(json.loads(data_str))
+                                    if data is None:
+                                        self.logger.warning("Ignoring non-object SSE event: {}", data_str[:200])
+                                        continue
                                     self.logger.debug("SSE event parsed: {}", data)
                                     await self._handle_receive_notification(data)
                                 except json.JSONDecodeError as e:
@@ -644,7 +670,7 @@ class SignalChannel(BaseChannel):
             self.logger.error("Error in SSE receive loop: {}", e)
             raise
 
-    @asynccontextmanager
+    @asynccontextmanager  # pyright: ignore[reportDeprecated]
     async def _safe_handle(self, action: str, payload: Any = None) -> AsyncIterator[None]:
         """Swallow and log any exception from a top-level handler block.
 
@@ -666,17 +692,18 @@ class SignalChannel(BaseChannel):
         self.logger.debug("_handle_receive_notification called with: {}", params)
         async with self._safe_handle("receive notification", params):
             # Extract envelope from SSE notification: {"envelope": {...}}
-            envelope = params.get("envelope", {})
+            envelope = _as_json_object(params.get("envelope"))
 
             self.logger.debug("Extracted envelope: {}", envelope)
 
-            if not envelope:
+            if envelope is None:
                 self.logger.debug("No envelope found in params")
                 return
 
             # Extract sender information
             sender_parts = self._collect_sender_id_parts(envelope)
-            source_name = envelope.get("sourceName")
+            source_name_value = envelope.get("sourceName")
+            source_name = source_name_value if isinstance(source_name_value, str) else None
 
             if not sender_parts:
                 self.logger.debug("Received message without source, skipping")
@@ -691,10 +718,10 @@ class SignalChannel(BaseChannel):
                     self._remember_account_id_alias(part)
 
             # Check different message types
-            data_message = envelope.get("dataMessage")
-            sync_message = envelope.get("syncMessage")
-            typing_message = envelope.get("typingMessage")
-            receipt_message = envelope.get("receiptMessage")
+            data_message = _as_json_object(envelope.get("dataMessage"))
+            sync_message = _as_json_object(envelope.get("syncMessage"))
+            typing_message = _as_json_object(envelope.get("typingMessage"))
+            receipt_message = _as_json_object(envelope.get("receiptMessage"))
 
             # Ignore receipt messages (delivery/read receipts)
             if receipt_message:
@@ -705,8 +732,7 @@ class SignalChannel(BaseChannel):
                 await self._handle_data_message(sender_id, sender_number, data_message, source_name)
 
             # Handle sync messages (messages sent from another device)
-            elif sync_message and sync_message.get("sentMessage"):
-                sent_msg = sync_message["sentMessage"]
+            elif sync_message and (sent_msg := _as_json_object(sync_message.get("sentMessage"))):
                 destination = sent_msg.get("destination") or sent_msg.get("destinationNumber")
                 if destination:
                     self.logger.debug(
@@ -725,10 +751,12 @@ class SignalChannel(BaseChannel):
         sender_name: str | None,
     ) -> None:
         """Handle a data message (text, attachments, etc.)."""
-        message_text = data_message.get("message") or ""
-        attachments = data_message.get("attachments", [])
-        mentions = data_message.get("mentions", [])
-        timestamp = data_message.get("timestamp")
+        message_value = data_message.get("message")
+        message_text = message_value if isinstance(message_value, str) else ""
+        attachments = _as_json_object_list(data_message.get("attachments"))
+        mentions = _as_json_object_list(data_message.get("mentions"))
+        timestamp_value = data_message.get("timestamp")
+        timestamp = timestamp_value if isinstance(timestamp_value, int) else None
 
         self.logger.info(
             "Data message from {}: groupInfo={}, groupV2={}, keys={}",
@@ -815,7 +843,7 @@ class SignalChannel(BaseChannel):
         group_id: str | None,
         is_group_message: bool,
         message_text: str,
-        mentions: list,
+        mentions: list[dict[str, Any]],
         sender_name: str | None,
         timestamp: int | None,
     ) -> tuple[bool, str]:
@@ -877,8 +905,8 @@ class SignalChannel(BaseChannel):
         sender_name: str | None,
         sender_number: str,
         message_text: str,
-        attachments: list,
-        mentions: list,
+        attachments: list[dict[str, Any]],
+        mentions: list[dict[str, Any]],
         is_group_message: bool,
         chat_id: str,
     ) -> tuple[str, list[str]]:
@@ -952,7 +980,9 @@ class SignalChannel(BaseChannel):
         """
         # Create buffer for this group if it doesn't exist
         if group_id not in self._group_buffers:
-            self._group_buffers[group_id] = deque(maxlen=self.config.group_message_buffer_size)
+            self._group_buffers[group_id] = deque[_BufferedMessage](
+                maxlen=self.config.group_message_buffer_size
+            )
 
         # Add message to buffer (deque will automatically drop oldest when full)
         self._group_buffers[group_id].append(
@@ -992,7 +1022,7 @@ class SignalChannel(BaseChannel):
         # We want to show context BEFORE the mention
         context_messages = list(buffer)[:-1]  # Exclude the last (current) message
 
-        lines = []
+        lines: list[str] = []
         for msg in context_messages:
             sender = msg["sender_name"]
             content = msg["content"][:200]  # Limit to 200 chars per message
@@ -1053,8 +1083,6 @@ class SignalChannel(BaseChannel):
         """Remember known bot identifiers for mention matching."""
         if not value:
             return
-        if not isinstance(value, str):
-            return
         for candidate in self._normalize_signal_id(value):
             self._account_id_aliases.add(candidate)
 
@@ -1062,8 +1090,6 @@ class SignalChannel(BaseChannel):
         """Return True when an identifier refers to the bot account."""
         if not value:
             return False
-        if not isinstance(value, str):
-            return False
         return any(
             candidate in self._account_id_aliases for candidate in self._normalize_signal_id(value)
         )
@@ -1097,13 +1123,14 @@ class SignalChannel(BaseChannel):
         return sender_parts[0] if sender_parts else ""
 
     @staticmethod
-    def _extract_group_id(group_info: Any, group_v2: Any) -> str | None:
+    def _extract_group_id(group_info: object, group_v2: object) -> str | None:
         """Extract group ID from groupInfo/groupV2 payloads across signal-cli variants."""
         for group_obj in (group_info, group_v2):
             if not isinstance(group_obj, dict):
                 continue
+            group = cast(dict[str, Any], group_obj)
             for key in ("groupId", "id", "groupID"):
-                value = group_obj.get(key)
+                value = group.get(key)
                 if isinstance(value, str) and value:
                     return value
         return None
@@ -1113,18 +1140,19 @@ class SignalChannel(BaseChannel):
         """Extract possible identifier fields from a mention payload."""
         ids: list[str] = []
 
-        def _walk(value: dict[str, Any] | Any, depth: int = 0) -> None:
+        def _walk(value: object, depth: int = 0) -> None:
             if depth > 2:
                 return
             if not isinstance(value, dict):
                 return
-            for key, child in value.items():
-                key_lower = str(key).lower()
+            object_value = cast(dict[str, Any], value)
+            for key, child in object_value.items():
+                key_lower = key.lower()
                 if isinstance(child, str) and child:
                     if any(token in key_lower for token in ("number", "uuid", "serviceid", "aci")):
                         ids.append(child)
                 elif isinstance(child, dict):
-                    _walk(child, depth + 1)
+                    _walk(cast(object, child), depth + 1)
 
         _walk(mention)
         return list(dict.fromkeys(ids))
@@ -1187,8 +1215,6 @@ class SignalChannel(BaseChannel):
 
         # If mention is required, check if bot was mentioned.
         for mention in mentions:
-            if not isinstance(mention, dict):
-                continue
             for mention_id in self._mention_id_candidates(mention):
                 if self._id_matches_account(mention_id):
                     return True
@@ -1197,15 +1223,13 @@ class SignalChannel(BaseChannel):
         # (for handle-style mentions). Accept a leading identifier-less mention
         # as a mention of the bot to avoid false negatives.
         for mention in mentions:
-            if not isinstance(mention, dict):
-                continue
             if self._mention_id_candidates(mention):
                 continue
             span = self._mention_span(mention)
             if not span:
                 continue
             start, _ = span
-            if message_text is not None and not message_text[:start].strip():
+            if not message_text[:start].strip():
                 self.logger.debug("Accepting identifier-less leading mention as bot mention")
                 return True
 
@@ -1241,10 +1265,8 @@ class SignalChannel(BaseChannel):
             return text
 
         # Build a list of (start, length) tuples for our bot's mentions
-        bot_mentions = []
+        bot_mentions: list[tuple[int, int]] = []
         for mention in mentions:
-            if not isinstance(mention, dict):
-                continue
             mention_ids = self._mention_id_candidates(mention)
             span = self._mention_span(mention)
             if not span:
@@ -1382,7 +1404,7 @@ class SignalChannel(BaseChannel):
         request_id = self._request_id
 
         # Build JSON-RPC request
-        request = {"jsonrpc": "2.0", "method": method, "id": request_id}
+        request: dict[str, Any] = {"jsonrpc": "2.0", "method": method, "id": request_id}
 
         if params:
             request["params"] = params
@@ -1397,7 +1419,10 @@ class SignalChannel(BaseChannel):
         try:
             response = await self._http.post("/api/v1/rpc", json=request)
             response.raise_for_status()
-            return response.json()
+            response_json = _as_json_object(response.json())
+            if response_json is None:
+                return {"error": {"message": "signal-cli returned a non-object JSON-RPC response"}}
+            return response_json
         except Exception as e:
             self.logger.error("HTTP request failed: {}", e)
             return {"error": {"message": str(e)}}

nanobot/channels/slack/runtime.py

@@ -3,15 +3,16 @@
 import asyncio
 import re
 from pathlib import Path
-from typing import Any
+from typing import Any, Protocol, cast
 
 import httpx
 from pydantic import Field
+from slack_sdk.socket_mode.async_client import AsyncBaseSocketModeClient
 from slack_sdk.socket_mode.request import SocketModeRequest
 from slack_sdk.socket_mode.response import SocketModeResponse
 from slack_sdk.socket_mode.websockets import SocketModeClient
 from slack_sdk.web.async_client import AsyncWebClient
-from slackify_markdown import slackify_markdown
+from slackify_markdown import slackify_markdown  # pyright: ignore[reportMissingTypeStubs]
 
 from nanobot.bus.events import OutboundMessage
 from nanobot.bus.outbound_events import ProgressEvent
@@ -23,6 +24,30 @@ from nanobot.pairing import is_approved
 from nanobot.utils.helpers import safe_filename, split_message
 
 
+def _as_json_object(value: Any) -> dict[str, Any] | None:
+    """Narrow Slack's untyped Socket Mode payloads at the boundary."""
+    return cast(dict[str, Any], value) if isinstance(value, dict) else None
+
+
+def _as_json_list(value: Any) -> list[Any] | None:
+    """Narrow Slack's untyped Socket Mode arrays at the boundary."""
+    return cast(list[Any], value) if isinstance(value, list) else None
+
+
+class _SlackWebAPI(Protocol):
+    """Subset of slack-sdk's dynamically typed Web API used by this channel."""
+
+    async def auth_test(self, **kwargs: Any) -> Any: ...
+    async def chat_postMessage(self, **kwargs: Any) -> Any: ...  # noqa: N802
+    async def conversations_list(self, **kwargs: Any) -> Any: ...
+    async def conversations_open(self, **kwargs: Any) -> Any: ...
+    async def conversations_replies(self, **kwargs: Any) -> Any: ...
+    async def files_upload_v2(self, **kwargs: Any) -> Any: ...
+    async def reactions_add(self, **kwargs: Any) -> Any: ...
+    async def reactions_remove(self, **kwargs: Any) -> Any: ...
+    async def users_list(self, **kwargs: Any) -> Any: ...
+
+
 class SlackDMConfig(Base):
     """Slack DM policy configuration."""
 
@@ -90,6 +115,13 @@ class SlackChannel(BaseChannel):
         self._target_cache: dict[str, str] = {}
         self._thread_context_attempted: set[str] = set()
 
+    def _require_web_api(self) -> _SlackWebAPI:
+        if self._web_client is None:
+            raise RuntimeError("Slack Web API client is not started")
+        # slack-sdk's public methods are runtime-stable but its annotations do
+        # not expose a useful shared interface, so narrow once at the SDK edge.
+        return cast(_SlackWebAPI, self._web_client)
+
     async def start(self) -> None:
         """Start the Slack Socket Mode client."""
         if not self.config.bot_token or not self.config.app_token:
@@ -111,7 +143,8 @@ class SlackChannel(BaseChannel):
 
         # Resolve bot user ID for mention handling
         try:
-            auth = await self._web_client.auth_test()
+            web_api = self._require_web_api()
+            auth = await web_api.auth_test()
             self._bot_user_id = auth.get("user_id")
             self.logger.info("bot connected as {}", self._bot_user_id)
         except Exception as e:
@@ -155,10 +188,17 @@ class SlackChannel(BaseChannel):
             self.logger.warning("client not running")
             return
         try:
+            web_api = self._require_web_api()
             target_chat_id = await self._resolve_target_chat_id(msg.chat_id)
-            slack_meta = msg.metadata.get("slack", {}) if msg.metadata else {}
+            raw_slack_meta: Any = msg.metadata.get("slack", {}) if msg.metadata else {}
+            slack_meta: dict[str, Any] = (
+                cast(dict[str, Any], raw_slack_meta)
+                if isinstance(raw_slack_meta, dict)
+                else {}
+            )
             thread_ts = slack_meta.get("thread_ts")
-            origin_chat_id = str((slack_meta.get("event", {}) or {}).get("channel") or msg.chat_id)
+            event_meta = cast(dict[str, Any], slack_meta.get("event", {}) or {})
+            origin_chat_id = str(event_meta.get("channel") or msg.chat_id)
             # Reply in the same thread the inbound message belongs to (works
             # for both real channel threads and DM threads). When the agent
             # is forwarding to a different channel, drop thread_ts because it
@@ -170,7 +210,20 @@ class SlackChannel(BaseChannel):
                 pass  # skip empty progress messages (e.g. tool-event-only updates)
             elif msg.content or not (msg.media or []):
                 mrkdwn = self._to_mrkdwn(msg.content) if msg.content else " "
-                buttons = getattr(msg, "buttons", None) or []
+                raw_buttons = getattr(msg, "buttons", None)
+                buttons: list[list[str]] = (
+                    cast(list[list[str]], raw_buttons)
+                    if isinstance(raw_buttons, list)
+                    and all(
+                        isinstance(row, list)
+                        and all(
+                            isinstance(label, str)
+                            for label in cast(list[object], row)
+                        )
+                        for row in cast(list[object], raw_buttons)
+                    )
+                    else []
+                )
                 chunks = split_message(mrkdwn, SLACK_MAX_MESSAGE_LEN)
                 for index, chunk in enumerate(chunks):
                     kwargs: dict[str, Any] = dict(
@@ -178,11 +231,11 @@ class SlackChannel(BaseChannel):
                     )
                     if buttons and index == len(chunks) - 1:
                         kwargs["blocks"] = self._build_button_blocks(chunk, buttons)
-                    await self._web_client.chat_postMessage(**kwargs)
+                    await web_api.chat_postMessage(**kwargs)
 
             for media_path in msg.media or []:
                 try:
-                    await self._web_client.files_upload_v2(
+                    await web_api.files_upload_v2(
                         channel=target_chat_id,
                         file=media_path,
                         thread_ts=thread_ts_param,
@@ -192,8 +245,16 @@ class SlackChannel(BaseChannel):
 
             # Update reaction emoji when the final (non-progress) response is sent
             if not is_progress:
-                event = slack_meta.get("event", {})
-                await self._update_react_emoji(origin_chat_id, event.get("ts"))
+                raw_event = slack_meta.get("event", {})
+                event = (
+                    cast(dict[str, Any], raw_event)
+                    if isinstance(raw_event, dict)
+                    else {}
+                )
+                await self._update_react_emoji(
+                    origin_chat_id,
+                    cast(str | None, event.get("ts")),
+                )
 
         except Exception:
             self.logger.exception("Error sending message")
@@ -237,20 +298,26 @@ class SlackChannel(BaseChannel):
             return self._target_cache[cache_key]
 
         cursor: str | None = None
+        web_api = self._require_web_api()
         while True:
-            response = await self._web_client.conversations_list(
+            response = cast(dict[str, Any], await web_api.conversations_list(
                 types="public_channel,private_channel",
                 exclude_archived=True,
                 limit=200,
                 cursor=cursor,
-            )
-            for channel in response.get("channels", []):
+            ))
+            for channel_value in cast(list[object], response.get("channels", [])):
+                channel = cast(dict[str, Any], channel_value)
                 if self._normalize_target_name(str(channel.get("name") or "")) == normalized:
                     channel_id = str(channel.get("id") or "")
                     if channel_id:
                         self._target_cache[cache_key] = channel_id
                         return channel_id
-            cursor = ((response.get("response_metadata") or {}).get("next_cursor") or "").strip()
+            response_metadata = cast(
+                dict[str, Any],
+                response.get("response_metadata") or {},
+            )
+            cursor = str(response_metadata.get("next_cursor") or "").strip()
             if not cursor:
                 break
 
@@ -269,9 +336,14 @@ class SlackChannel(BaseChannel):
             return self._target_cache[cache_key]
 
         cursor: str | None = None
+        web_api = self._require_web_api()
         while True:
-            response = await self._web_client.users_list(limit=200, cursor=cursor)
-            for member in response.get("members", []):
+            response = cast(
+                dict[str, Any],
+                await web_api.users_list(limit=200, cursor=cursor),
+            )
+            for member_value in cast(list[object], response.get("members", [])):
+                member = cast(dict[str, Any], member_value)
                 if self._member_matches_handle(member, normalized):
                     user_id = str(member.get("id") or "")
                     if not user_id:
@@ -279,7 +351,11 @@ class SlackChannel(BaseChannel):
                     dm_id = await self._open_dm_for_user(user_id)
                     self._target_cache[cache_key] = dm_id
                     return dm_id
-            cursor = ((response.get("response_metadata") or {}).get("next_cursor") or "").strip()
+            response_metadata = cast(
+                dict[str, Any],
+                response.get("response_metadata") or {},
+            )
+            cursor = str(response_metadata.get("next_cursor") or "").strip()
             if not cursor:
                 break
 
@@ -288,8 +364,13 @@ class SlackChannel(BaseChannel):
         )
 
     async def _open_dm_for_user(self, user_id: str) -> str:
-        response = await self._web_client.conversations_open(users=user_id)
-        channel_id = str(((response.get("channel") or {}).get("id")) or "")
+        web_api = self._require_web_api()
+        response = cast(
+            dict[str, Any],
+            await web_api.conversations_open(users=user_id),
+        )
+        channel = cast(dict[str, Any], response.get("channel") or {})
+        channel_id = str(channel.get("id") or "")
         if not channel_id:
             raise ValueError(f"Slack DM target for user '{user_id}' could not be opened.")
         return channel_id
@@ -300,7 +381,7 @@ class SlackChannel(BaseChannel):
 
     @classmethod
     def _member_matches_handle(cls, member: dict[str, Any], normalized: str) -> bool:
-        profile = member.get("profile") or {}
+        profile = cast(dict[str, Any], member.get("profile") or {})
         candidates = {
             str(member.get("name") or ""),
             str(profile.get("display_name") or ""),
@@ -312,7 +393,7 @@ class SlackChannel(BaseChannel):
 
     async def _on_socket_request(
         self,
-        client: SocketModeClient,
+        client: AsyncBaseSocketModeClient,
         req: SocketModeRequest,
     ) -> None:
         """Handle incoming Socket Mode requests."""
@@ -327,8 +408,8 @@ class SlackChannel(BaseChannel):
             SocketModeResponse(envelope_id=req.envelope_id)
         )
 
-        payload = req.payload or {}
-        event = payload.get("event") or {}
+        payload = _as_json_object(cast(Any, req).payload) or {}
+        event = _as_json_object(payload.get("event")) or {}
         event_type = event.get("type")
 
         # Handle app mentions or plain messages
@@ -349,6 +430,8 @@ class SlackChannel(BaseChannel):
         # Avoid double-processing: Slack sends both `message` and `app_mention`
         # for mentions in channels. Prefer `app_mention`.
         text = event.get("text") or ""
+        if not isinstance(text, str):
+            return
         if event_type == "message" and self._bot_user_id and f"<@{self._bot_user_id}>" in text:
             return
 
@@ -362,10 +445,12 @@ class SlackChannel(BaseChannel):
             event.get("channel_type"),
             text[:80],
         )
-        if not sender_id or not chat_id:
+        if not isinstance(sender_id, str) or not sender_id or not isinstance(chat_id, str) or not chat_id:
             return
 
         channel_type = event.get("channel_type") or ""
+        if not isinstance(channel_type, str):
+            channel_type = ""
 
         if not self._is_allowed(sender_id, chat_id, channel_type):
             if channel_type == "im" and self.config.dm.enabled:
@@ -383,7 +468,9 @@ class SlackChannel(BaseChannel):
         text = self._strip_bot_mention(text)
 
         event_ts = event.get("ts")
+        event_ts = event_ts if isinstance(event_ts, str) else None
         raw_thread_ts = event.get("thread_ts")
+        raw_thread_ts = raw_thread_ts if isinstance(raw_thread_ts, str) else None
         thread_ts = raw_thread_ts
         # In DMs we don't auto-open a thread on top-level messages (it would
         # bury replies under "1 reply"). But if the user explicitly opened a
@@ -396,11 +483,12 @@ class SlackChannel(BaseChannel):
             thread_ts = event_ts
         # Add :eyes: reaction to the triggering message (best-effort)
         try:
-            if self._web_client and event.get("ts"):
-                await self._web_client.reactions_add(
+            if self._web_client and event_ts:
+                web_api = self._require_web_api()
+                await web_api.reactions_add(
                     channel=chat_id,
                     name=self.config.react_emoji,
-                    timestamp=event.get("ts"),
+                    timestamp=event_ts,
                 )
         except Exception as e:
             self.logger.debug("reactions_add failed: {}", e)
@@ -413,10 +501,11 @@ class SlackChannel(BaseChannel):
         )
         media_paths: list[str] = []
         file_markers: list[str] = []
-        for file_info in event.get("files") or []:
-            if not isinstance(file_info, dict):
+        for file_info in _as_json_list(event.get("files")) or []:
+            file_info_object = _as_json_object(file_info)
+            if file_info_object is None:
                 continue
-            file_path, marker = await self._download_slack_file(file_info)
+            file_path, marker = await self._download_slack_file(file_info_object)
             if file_path:
                 media_paths.append(file_path)
             if marker:
@@ -503,22 +592,30 @@ class SlackChannel(BaseChannel):
         preview = response.content[:256].lstrip().lower()
         return preview.startswith(_HTML_DOWNLOAD_PREFIXES)
 
-    async def _on_block_action(self, client: SocketModeClient, req: SocketModeRequest) -> None:
+    async def _on_block_action(
+        self,
+        client: AsyncBaseSocketModeClient,
+        req: SocketModeRequest,
+    ) -> None:
         """Handle button clicks from inline action buttons."""
         await client.send_socket_mode_response(SocketModeResponse(envelope_id=req.envelope_id))
-        payload = req.payload or {}
-        actions = payload.get("actions") or []
+        payload = cast(dict[str, Any], cast(Any, req).payload or {})
+        actions = cast(list[Any], payload.get("actions") or [])
         if not actions:
             return
-        value = str(actions[0].get("value") or "")
-        user_info = payload.get("user") or {}
+        action = cast(dict[str, Any], actions[0])
+        value = str(action.get("value") or "")
+        user_info = cast(dict[str, Any], payload.get("user") or {})
         sender_id = str(user_info.get("id") or "")
-        channel_info = payload.get("channel") or {}
+        channel_info = cast(dict[str, Any], payload.get("channel") or {})
         chat_id = str(channel_info.get("id") or "")
         if not sender_id or not chat_id or not value:
             return
-        message_info = payload.get("message") or {}
-        thread_ts = message_info.get("thread_ts") or message_info.get("ts")
+        message_info = cast(dict[str, Any], payload.get("message") or {})
+        thread_ts = cast(
+            str | None,
+            message_info.get("thread_ts") or message_info.get("ts"),
+        )
         channel_type = self._infer_channel_type(chat_id)
         if not self._is_allowed(sender_id, chat_id, channel_type):
             return
@@ -563,17 +660,18 @@ class SlackChannel(BaseChannel):
         self._thread_context_attempted.add(key)
 
         try:
-            response = await self._web_client.conversations_replies(
+            web_api = self._require_web_api()
+            response = cast(dict[str, Any], await web_api.conversations_replies(
                 channel=chat_id,
                 ts=thread_ts,
                 limit=max(1, self.config.thread_context_limit),
-            )
+            ))
         except Exception as e:
             self.logger.warning("thread context unavailable for {}: {}", key, e)
             return text
 
         lines = self._format_thread_context(
-            response.get("messages", []),
+            cast(list[dict[str, Any]], response.get("messages", [])),
             current_ts=current_ts,
         )
         if not lines:
@@ -605,7 +703,7 @@ class SlackChannel(BaseChannel):
         blocks: list[dict[str, Any]] = [
             {"type": "section", "text": {"type": "mrkdwn", "text": text[:3000]}},
         ]
-        elements = []
+        elements: list[dict[str, Any]] = []
         for row in buttons:
             for label in row:
                 elements.append({
@@ -622,8 +720,9 @@ class SlackChannel(BaseChannel):
         """Remove the in-progress reaction and optionally add a done reaction."""
         if not self._web_client or not ts:
             return
+        web_api = self._require_web_api()
         try:
-            await self._web_client.reactions_remove(
+            await web_api.reactions_remove(
                 channel=chat_id,
                 name=self.config.react_emoji,
                 timestamp=ts,
@@ -632,7 +731,7 @@ class SlackChannel(BaseChannel):
             self.logger.debug("reactions_remove failed: {}", e)
         if self.config.done_emoji:
             try:
-                await self._web_client.reactions_add(
+                await web_api.reactions_add(
                     channel=chat_id,
                     name=self.config.done_emoji,
                     timestamp=ts,
@@ -703,7 +802,7 @@ class SlackChannel(BaseChannel):
             return ""
         code_blocks: list[str] = []
 
-        def _save_fence(m: re.Match) -> str:
+        def _save_fence(m: re.Match[str]) -> str:
             code_blocks.append(m.group(0))
             return f"\x00CB{len(code_blocks) - 1}\x00"
 
@@ -718,7 +817,7 @@ class SlackChannel(BaseChannel):
         """Fix markdown artifacts that slackify_markdown misses."""
         code_blocks: list[str] = []
 
-        def _save_code(m: re.Match) -> str:
+        def _save_code(m: re.Match[str]) -> str:
             code_blocks.append(m.group(0))
             return f"\x00CB{len(code_blocks) - 1}\x00"
 
@@ -726,14 +825,17 @@ class SlackChannel(BaseChannel):
         text = cls._INLINE_CODE_RE.sub(_save_code, text)
         text = cls._LEFTOVER_BOLD_RE.sub(r"*\1*", text)
         text = cls._LEFTOVER_HEADER_RE.sub(r"*\1*", text)
-        text = cls._BARE_URL_RE.sub(lambda m: m.group(0).replace("&amp;", "&"), text)
+        text = cls._BARE_URL_RE.sub(
+            lambda m: m.group(0).replace("&amp;", "&"),
+            text,
+        )
 
         for i, block in enumerate(code_blocks):
             text = text.replace(f"\x00CB{i}\x00", block)
         return text
 
     @staticmethod
-    def _convert_table(match: re.Match) -> str:
+    def _convert_table(match: re.Match[str]) -> str:
         """Convert a Markdown table to a Slack-readable list."""
         lines = [ln.strip() for ln in match.group(0).strip().splitlines() if ln.strip()]
         if len(lines) < 2:

nanobot/channels/telegram/runtime.py

@@ -8,8 +8,9 @@ import time
 import unicodedata
 from contextlib import suppress
 from dataclasses import dataclass
+from datetime import timedelta
 from pathlib import Path
-from typing import Any, Literal
+from typing import Any, Awaitable, Callable, Literal, TypeAlias, TypeVar, cast
 from urllib.parse import urlparse
 
 from pydantic import Field, field_validator, model_validator
@@ -17,9 +18,12 @@ from telegram import (
     BotCommand,
     InlineKeyboardButton,
     InlineKeyboardMarkup,
+    Message,
+    MessageEntity,
     ReactionTypeEmoji,
     ReplyParameters,
     Update,
+    User,
 )
 from telegram.error import BadRequest, NetworkError, TimedOut
 from telegram.ext import Application, CallbackQueryHandler, ContextTypes, MessageHandler, filters
@@ -43,6 +47,12 @@ TELEGRAM_MAX_MESSAGE_LEN = 4000  # Telegram message character limit
 TELEGRAM_HTML_MAX_LEN = 4096
 TELEGRAM_REPLY_CONTEXT_MAX_LEN = TELEGRAM_MAX_MESSAGE_LEN  # Max length for reply context in user message
 
+# python-telegram-bot exposes a six-parameter Application generic. Nanobot
+# doesn't customize its context/data/job-queue types, so keep that SDK boundary
+# explicit rather than allowing unspecialized generics to spread Unknown.
+TelegramApplication: TypeAlias = Application[Any, Any, Any, Any, Any, Any]
+_T = TypeVar("_T")
+
 
 def _split_telegram_markdown(content: str, max_len: int) -> list[str]:
     """Split raw Telegram Markdown without leaving fenced code blocks unbalanced."""
@@ -218,7 +228,7 @@ def _markdown_to_telegram_html(text: str) -> str:
 
     # 1. Extract and protect code blocks (preserve content from other processing)
     code_blocks: list[str] = []
-    def save_code_block(m: re.Match) -> str:
+    def save_code_block(m: re.Match[str]) -> str:
         code_blocks.append(m.group(1))
         return f"\x00CB{len(code_blocks) - 1}\x00"
 
@@ -247,7 +257,7 @@ def _markdown_to_telegram_html(text: str) -> str:
 
     # 2. Extract and protect inline code
     inline_codes: list[str] = []
-    def save_inline_code(m: re.Match) -> str:
+    def save_inline_code(m: re.Match[str]) -> str:
         inline_codes.append(m.group(1))
         return f"\x00IC{len(inline_codes) - 1}\x00"
 
@@ -350,7 +360,7 @@ class _QueuedTelegramUpdate:
 
     kind: Literal["command", "message"]
     update: Update
-    context: Any
+    context: ContextTypes.DEFAULT_TYPE
     sort_key: tuple[int, int]
 
 
@@ -421,7 +431,7 @@ class TelegramChannel(BaseChannel):
     display_name = "Telegram"
 
     # Commands registered with Telegram's command menu
-    BOT_COMMANDS = [
+    BOT_COMMANDS: list[BotCommand] = [
         BotCommand("start", "Start the bot"),
         BotCommand("new", "Start a new conversation"),
         BotCommand("stop", "Stop the current task"),
@@ -455,19 +465,24 @@ class TelegramChannel(BaseChannel):
             config = TelegramConfig.model_validate(config)
         super().__init__(config, bus)
         self.config: TelegramConfig = config
-        self._app: Application | None = None
+        self._app: TelegramApplication | None = None
         self._chat_ids: dict[str, int] = {}  # Map sender_id to chat_id for replies
-        self._typing_tasks: dict[str, asyncio.Task] = {}  # chat_id -> typing loop task
-        self._media_group_buffers: dict[str, dict] = {}
-        self._media_group_tasks: dict[str, asyncio.Task] = {}
+        self._typing_tasks: dict[str, asyncio.Task[None]] = {}  # chat_id -> typing loop task
+        self._media_group_buffers: dict[str, dict[str, Any]] = {}
+        self._media_group_tasks: dict[str, asyncio.Task[None]] = {}
         self._message_threads: dict[tuple[str, int], int] = {}
         self._bot_user_id: int | None = None
         self._bot_username: str | None = None
         self._stream_bufs: dict[str, _StreamBuf] = {}  # chat_id -> streaming state
         self._inbound_buffers: dict[str, list[_QueuedTelegramUpdate]] = {}
-        self._inbound_workers: dict[str, asyncio.Task] = {}
+        self._inbound_workers: dict[str, asyncio.Task[None]] = {}
         self._rich_send_disabled: bool = False  # Latch off if Bot API < 10.1
 
+    def _require_app(self) -> TelegramApplication:
+        if self._app is None:
+            raise RuntimeError("Telegram application is not started")
+        return self._app
+
     def is_allowed(self, sender_id: str) -> bool:
         """Preserve Telegram's legacy id|username allowlist matching."""
         if super().is_allowed(sender_id):
@@ -595,7 +610,7 @@ class TelegramChannel(BaseChannel):
         if self.config.mode == "webhook":
             # ``url_path`` is the local HTTP route. ``webhook_url`` is the
             # public HTTPS URL Telegram calls; reverse proxies may rewrite it.
-            await self._app.updater.start_webhook(
+            await cast(Any, self._app.updater).start_webhook(
                 listen=self.config.webhook_listen_host,
                 port=self.config.webhook_listen_port,
                 url_path=self.config.webhook_path.lstrip("/"),
@@ -607,7 +622,7 @@ class TelegramChannel(BaseChannel):
             )
         else:
             # Start polling (this runs until stopped)
-            await self._app.updater.start_polling(
+            await cast(Any, self._app.updater).start_polling(
                 allowed_updates=allowed_updates,
                 drop_pending_updates=False,  # Process pending messages on startup
                 error_callback=self._on_polling_error,
@@ -637,7 +652,7 @@ class TelegramChannel(BaseChannel):
 
         if self._app:
             self.logger.info("Stopping bot...")
-            await self._app.updater.stop()
+            await cast(Any, self._app.updater).stop()
             await self._app.stop()
             await self._app.shutdown()
             self._app = None
@@ -674,9 +689,9 @@ class TelegramChannel(BaseChannel):
         self,
         chat_id: int,
         content: str,
-        reply_params=None,
-        thread_kwargs: dict | None = None,
-        reply_markup=None,
+        reply_params: ReplyParameters | dict[str, int | bool] | None = None,
+        thread_kwargs: dict[str, int] | None = None,
+        reply_markup: InlineKeyboardMarkup | None = None,
     ) -> bool:
         """Attempt sendRichMessage (Bot API 10.1). Returns True on success."""
         if not self._app:
@@ -692,13 +707,17 @@ class TelegramChannel(BaseChannel):
             # sendRichMessage uses reply_parameters (object), not reply_to_message_id.
             if hasattr(reply_params, "message_id"):
                 payload["reply_parameters"] = {
-                    "message_id": reply_params.message_id,
+                    "message_id": cast(ReplyParameters, reply_params).message_id,
                     "allow_sending_without_reply": True,
                 }
             else:
                 payload["reply_parameters"] = reply_params
         if thread_kwargs:
-            payload.update({k: v for k, v in thread_kwargs.items() if v is not None})
+            payload.update({
+                k: v
+                for k, v in thread_kwargs.items()
+                if v is not None  # pyright: ignore[reportUnnecessaryComparison]
+            })
         if reply_markup is not None:
             payload["reply_markup"] = reply_markup
 
@@ -749,7 +768,7 @@ class TelegramChannel(BaseChannel):
         message_thread_id = msg.metadata.get("message_thread_id")
         if message_thread_id is None and reply_to_message_id is not None:
             message_thread_id = self._message_threads.get((msg.chat_id, reply_to_message_id))
-        thread_kwargs = {}
+        thread_kwargs: dict[str, int] = {}
         if message_thread_id is not None:
             thread_kwargs["message_thread_id"] = message_thread_id
 
@@ -820,7 +839,7 @@ class TelegramChannel(BaseChannel):
         # Send text content
         if msg.content and msg.content != "[empty message]":
             render_as_blockquote = bool(progress_event and progress_event.tool_hint)
-            buttons = getattr(msg, "buttons", None) or []
+            buttons = cast(list[list[str]], getattr(msg, "buttons", None) or [])
             reply_markup = self._build_keyboard(buttons) if buttons else None
             text = msg.content
             # Fallback: no native keyboard → splice labels into the message so the choices survive.
@@ -850,7 +869,12 @@ class TelegramChannel(BaseChannel):
                     reply_markup=reply_markup if is_last else None,
                 )
 
-    async def _call_with_retry(self, fn, *args, **kwargs):
+    async def _call_with_retry(
+        self,
+        fn: Callable[..., Awaitable[_T]],
+        *args: Any,
+        **kwargs: Any,
+    ) -> _T:
         """Call an async Telegram API function with retry on pool/network timeout and RetryAfter."""
         from telegram.error import RetryAfter
 
@@ -869,27 +893,34 @@ class TelegramChannel(BaseChannel):
             except RetryAfter as e:
                 if attempt == _SEND_MAX_RETRIES:
                     raise
-                delay = float(e.retry_after)
+                retry_after = e.retry_after
+                delay = (
+                    retry_after.total_seconds()
+                    if isinstance(retry_after, timedelta)
+                    else float(retry_after)
+                )
                 self.logger.warning(
                     "Flood Control (attempt {}/{}), retrying in {:.1f}s",
                     attempt, _SEND_MAX_RETRIES, delay,
                 )
                 await asyncio.sleep(delay)
+        raise RuntimeError("Telegram retry loop exited unexpectedly")
 
     async def _send_text(
         self,
         chat_id: int,
         text: str,
-        reply_params=None,
-        thread_kwargs: dict | None = None,
+        reply_params: ReplyParameters | None = None,
+        thread_kwargs: dict[str, int] | None = None,
         render_as_blockquote: bool = False,
-        reply_markup=None,
+        reply_markup: InlineKeyboardMarkup | None = None,
     ) -> None:
         """Send a plain text message with HTML fallback."""
+        app = self._require_app()
         try:
             html = _tool_hint_to_telegram_blockquote(text) if render_as_blockquote else _markdown_to_telegram_html(text)
             await self._call_with_retry(
-                self._app.bot.send_message,
+                app.bot.send_message,
                 chat_id=chat_id, text=html, parse_mode="HTML",
                 reply_parameters=reply_params,
                 reply_markup=reply_markup,
@@ -899,7 +930,7 @@ class TelegramChannel(BaseChannel):
             self.logger.warning("HTML parse failed, falling back to plain text: {}", e)
             try:
                 await self._call_with_retry(
-                    self._app.bot.send_message,
+                    app.bot.send_message,
                     chat_id=chat_id,
                     text=text,
                     reply_parameters=reply_params,
@@ -945,7 +976,7 @@ class TelegramChannel(BaseChannel):
             if reply_to_message_id := meta.get("message_id"):
                 with suppress(ValueError):
                     await self._remove_reaction(chat_id, int(reply_to_message_id))
-            thread_kwargs = {}
+            thread_kwargs: dict[str, int] = {}
             if message_thread_id := meta.get("message_thread_id"):
                 thread_kwargs["message_thread_id"] = message_thread_id
             raw_text = buf.text
@@ -1032,16 +1063,16 @@ class TelegramChannel(BaseChannel):
             return
 
         now = time.monotonic()
-        thread_kwargs = {}
+        stream_thread_kwargs: dict[str, int] = {}
         if message_thread_id := meta.get("message_thread_id"):
-            thread_kwargs["message_thread_id"] = message_thread_id
+            stream_thread_kwargs["message_thread_id"] = message_thread_id
         if buf.message_id is None:
             preview = _strip_md_block(buf.text)
             try:
                 sent = await self._call_with_retry(
                     self._app.bot.send_message,
                     chat_id=int_chat_id, text=preview,
-                    **thread_kwargs,
+                    **stream_thread_kwargs,
                 )
                 buf.message_id = sent.message_id
                 buf.last_edit = now
@@ -1050,7 +1081,7 @@ class TelegramChannel(BaseChannel):
                 raise  # Let ChannelManager handle retry
         elif (now - buf.last_edit) >= self.config.stream_edit_interval:
             if len(buf.text) > TELEGRAM_MAX_MESSAGE_LEN:
-                await self._flush_stream_overflow(int_chat_id, buf, thread_kwargs)
+                await self._flush_stream_overflow(int_chat_id, buf, stream_thread_kwargs)
                 buf.last_edit = now
                 return
             preview = _strip_md_block(buf.text)
@@ -1072,7 +1103,7 @@ class TelegramChannel(BaseChannel):
         self,
         chat_id: int,
         buf: "_StreamBuf",
-        thread_kwargs: dict,
+        thread_kwargs: dict[str, int],
     ) -> None:
         """Split an oversized stream buffer mid-flight.
 
@@ -1083,10 +1114,11 @@ class TelegramChannel(BaseChannel):
         chunks = _split_telegram_markdown_html_chunks(buf.text, TELEGRAM_HTML_MAX_LEN)
         if len(chunks) <= 1:
             return
+        app = self._require_app()
         first_markdown, first_html = chunks[0]
         try:
             await self._call_with_retry(
-                self._app.bot.edit_message_text,
+                app.bot.edit_message_text,
                 chat_id=chat_id, message_id=buf.message_id,
                 text=first_html,
                 parse_mode="HTML",
@@ -1098,7 +1130,7 @@ class TelegramChannel(BaseChannel):
                 )
                 try:
                     await self._call_with_retry(
-                        self._app.bot.edit_message_text,
+                        app.bot.edit_message_text,
                         chat_id=chat_id, message_id=buf.message_id,
                         text=first_markdown,
                     )
@@ -1113,7 +1145,7 @@ class TelegramChannel(BaseChannel):
         async def send_chunk(markdown: str, html: str) -> Any:
             try:
                 return await self._call_with_retry(
-                    self._app.bot.send_message,
+                    app.bot.send_message,
                     chat_id=chat_id, text=html, parse_mode="HTML", **thread_kwargs,
                 )
             except BadRequest as e:
@@ -1121,7 +1153,7 @@ class TelegramChannel(BaseChannel):
                     "Stream overflow HTML send failed, falling back to plain text: {}", e
                 )
                 return await self._call_with_retry(
-                    self._app.bot.send_message,
+                    app.bot.send_message,
                     chat_id=chat_id, text=markdown, **thread_kwargs,
                 )
 
@@ -1160,12 +1192,14 @@ class TelegramChannel(BaseChannel):
         await update.message.reply_text(build_help_text())
 
     @staticmethod
-    def _sender_id(user) -> str:
+    def _sender_id(user: User) -> str:
         """Build sender_id with username for allowlist matching."""
         sid = str(user.id)
         return f"{sid}|{user.username}" if user.username else sid
 
-    async def _send_pairing_code_if_private(self, sender_id: str, message, user) -> None:
+    async def _send_pairing_code_if_private(
+        self, sender_id: str, message: Message, user: User
+    ) -> None:
         if message.chat.type != "private":
             return
         await self._handle_message(
@@ -1177,7 +1211,7 @@ class TelegramChannel(BaseChannel):
         )
 
     @staticmethod
-    def _derive_topic_session_key(message) -> str | None:
+    def _derive_topic_session_key(message: Message) -> str | None:
         """Derive topic-scoped session key for Telegram chats with threads."""
         message_thread_id = getattr(message, "message_thread_id", None)
         if message_thread_id is None:
@@ -1185,7 +1219,7 @@ class TelegramChannel(BaseChannel):
         return f"telegram:{message.chat_id}:topic:{message_thread_id}"
 
     @staticmethod
-    def _build_message_metadata(message, user) -> dict:
+    def _build_message_metadata(message: Message, user: User) -> dict[str, Any]:
         """Build common Telegram inbound metadata payload."""
         reply_to = getattr(message, "reply_to_message", None)
         return {
@@ -1199,7 +1233,7 @@ class TelegramChannel(BaseChannel):
             "reply_to_message_id": getattr(reply_to, "message_id", None) if reply_to else None,
         }
 
-    async def _extract_reply_context(self, message) -> str | None:
+    async def _extract_reply_context(self, message: Message) -> str | None:
         """Extract text from the message being replied to, if any."""
         reply = getattr(message, "reply_to_message", None)
         if not reply:
@@ -1224,7 +1258,7 @@ class TelegramChannel(BaseChannel):
             return f"[Reply to: {text}]"
 
     async def _download_message_media(
-        self, msg, *, add_failure_content: bool = False
+        self, msg: Message, *, add_failure_content: bool = False
     ) -> tuple[list[str], list[str]]:
         """Download media from a message (current or reply). Returns (media_paths, content_parts)."""
         media_file = None
@@ -1255,7 +1289,7 @@ class TelegramChannel(BaseChannel):
         try:
             file = await self._app.bot.get_file(media_file.file_id)
             ext = self._get_extension(
-                media_type,
+                cast(str, media_type),
                 getattr(media_file, "mime_type", None),
                 getattr(media_file, "file_name", None),
             )
@@ -1291,7 +1325,7 @@ class TelegramChannel(BaseChannel):
     @staticmethod
     def _has_mention_entity(
         text: str,
-        entities,
+        entities: list[MessageEntity] | None,
         bot_username: str,
         bot_id: int | None,
     ) -> bool:
@@ -1314,7 +1348,7 @@ class TelegramChannel(BaseChannel):
                 return True
         return handle in text.lower()
 
-    async def _is_group_message_for_bot(self, message) -> bool:
+    async def _is_group_message_for_bot(self, message: Message) -> bool:
         """Allow group messages when policy is open, @mentioned, or replying to the bot."""
         if message.chat.type == "private" or self.config.group_policy == "open":
             return True
@@ -1341,7 +1375,7 @@ class TelegramChannel(BaseChannel):
         reply_user = getattr(getattr(message, "reply_to_message", None), "from_user", None)
         return bool(bot_id and reply_user and reply_user.id == bot_id)
 
-    def _remember_thread_context(self, message) -> None:
+    def _remember_thread_context(self, message: Message) -> None:
         """Cache Telegram thread context by chat/message id for follow-up replies."""
         message_thread_id = getattr(message, "message_thread_id", None)
         if message_thread_id is None:
@@ -1352,7 +1386,7 @@ class TelegramChannel(BaseChannel):
             self._message_threads.pop(next(iter(self._message_threads)))
 
     @staticmethod
-    def _queue_key_for_message(message) -> str:
+    def _queue_key_for_message(message: Message) -> str:
         """Return the final nanobot session key used for ordered Telegram ingress."""
         return TelegramChannel._derive_topic_session_key(message) or f"telegram:{message.chat_id}"
 
@@ -1373,6 +1407,8 @@ class TelegramChannel(BaseChannel):
     ) -> None:
         """Stage a Telegram update behind a short per-session reorder window."""
         message = update.message
+        if message is None:
+            return
         key = self._queue_key_for_message(message)
         self._inbound_buffers.setdefault(key, []).append(
             _QueuedTelegramUpdate(
@@ -1432,6 +1468,8 @@ class TelegramChannel(BaseChannel):
         """Process a queued slash command."""
         message = update.message
         user = update.effective_user
+        if message is None or user is None:
+            return
         sender_id = self._sender_id(user)
         if not self.is_allowed(sender_id):
             await self._send_pairing_code_if_private(sender_id, message, user)
@@ -1469,6 +1507,8 @@ class TelegramChannel(BaseChannel):
 
         message = update.message
         user = update.effective_user
+        if message is None or user is None:
+            return
         chat_id = message.chat_id
         sender_id = self._sender_id(user)
         if not self.is_allowed(sender_id):
@@ -1483,8 +1523,8 @@ class TelegramChannel(BaseChannel):
             return
 
         # Build content from text and/or media
-        content_parts = []
-        media_paths = []
+        content_parts: list[str] = []
+        media_paths: list[str] = []
 
         # Text content
         if message.text:
@@ -1625,8 +1665,10 @@ class TelegramChannel(BaseChannel):
             self.logger.debug("Typing indicator stopped for {}: {}", chat_id, e)
 
     @staticmethod
-    def _format_telegram_error(exc: Exception) -> str:
+    def _format_telegram_error(exc: Exception | None) -> str:
         """Return a short, readable error summary for logs."""
+        if exc is None:
+            return "None"
         text = str(exc).strip()
         if text:
             return text
@@ -1682,7 +1724,7 @@ class TelegramChannel(BaseChannel):
 
         return ""
 
-    def _build_keyboard(self, buttons: list) -> InlineKeyboardMarkup | None:
+    def _build_keyboard(self, buttons: list[list[str]]) -> InlineKeyboardMarkup | None:
         """Build inline keyboard markup if inline_keyboards is enabled."""
         if not buttons or not self.config.inline_keyboards:
             return None
@@ -1711,7 +1753,8 @@ class TelegramChannel(BaseChannel):
             return
         query = update.callback_query
         user = update.effective_user
-        chat_id = query.message.chat_id if query.message else None
+        query_message = query.message
+        chat_id = query_message.chat.id if query_message else None
         sender_id = self._sender_id(user)
         if not chat_id:
             self.logger.warning("Callback query without chat_id")
@@ -1720,9 +1763,9 @@ class TelegramChannel(BaseChannel):
             return
         button_label = query.data or ""
         await query.answer()
-        if query.message:
+        if isinstance(query_message, Message):
             with suppress(Exception):
-                await query.message.edit_reply_markup(reply_markup=None)
+                await query_message.edit_reply_markup(reply_markup=None)
         self.logger.debug("Inline button tap from {}: {}", sender_id, button_label)
         self._start_typing(str(chat_id))
         await self._handle_message(

nanobot/channels/telegram/tests/test_telegram_channel.py

@@ -1,4 +1,5 @@
 import asyncio
+from datetime import timedelta
 from pathlib import Path
 from types import SimpleNamespace
 from unittest.mock import AsyncMock
@@ -1911,6 +1912,36 @@ async def test_on_message_location_with_text() -> None:
 # Tests for retry amplification fix (issue #3050)
 # ---------------------------------------------------------------------------
 
+@pytest.mark.asyncio
+async def test_call_with_retry_accepts_timedelta_retry_after(
+    monkeypatch: pytest.MonkeyPatch,
+) -> None:
+    from telegram.error import RetryAfter
+
+    channel = TelegramChannel(
+        TelegramConfig(enabled=True, token="123:abc", allow_from=["*"]),
+        MessageBus(),
+    )
+    attempts = 0
+
+    async def retry_once() -> str:
+        nonlocal attempts
+        attempts += 1
+        if attempts == 1:
+            raise RetryAfter(timedelta(seconds=1.5))
+        return "ok"
+
+    sleep = AsyncMock()
+    monkeypatch.setenv("PTB_TIMEDELTA", "1")
+    monkeypatch.setattr(
+        "nanobot.channels.telegram.runtime.asyncio.sleep",
+        sleep,
+    )
+
+    assert await channel._call_with_retry(retry_once) == "ok"
+    sleep.assert_awaited_once_with(1.5)
+
+
 @pytest.mark.asyncio
 async def test_send_text_does_not_fallback_on_network_timeout() -> None:
     """TimedOut should propagate immediately, NOT trigger plain-text fallback.
@@ -2318,7 +2349,7 @@ async def test_callback_query_ignores_unauthorized_user_before_side_effects() ->
         data="Yes",
         answer=AsyncMock(),
         message=SimpleNamespace(
-            chat_id=123,
+            chat=SimpleNamespace(id=123),
             edit_reply_markup=AsyncMock(),
         ),
     )
@@ -2332,3 +2363,35 @@ async def test_callback_query_ignores_unauthorized_user_before_side_effects() ->
     query.answer.assert_not_awaited()
     query.message.edit_reply_markup.assert_not_awaited()
     channel._handle_message.assert_not_awaited()
+
+
+@pytest.mark.asyncio
+async def test_callback_query_handles_inaccessible_message() -> None:
+    from telegram import Chat, InaccessibleMessage
+
+    channel = TelegramChannel(
+        TelegramConfig(enabled=True, token="123:abc", allow_from=["*"], inline_keyboards=True),
+        MessageBus(),
+    )
+    channel._handle_message = AsyncMock()
+    channel._start_typing = lambda _chat_id: None
+
+    query = SimpleNamespace(
+        id="cb_inaccessible",
+        data="Yes",
+        answer=AsyncMock(),
+        message=InaccessibleMessage(
+            chat=Chat(id=123, type="private"),
+            message_id=456,
+        ),
+    )
+    update = SimpleNamespace(
+        callback_query=query,
+        effective_user=SimpleNamespace(id=12345, username="alice", first_name="Alice"),
+    )
+
+    await channel._on_callback_query(update, None)
+
+    query.answer.assert_awaited_once()
+    channel._handle_message.assert_awaited_once()
+    assert channel._handle_message.await_args.kwargs["chat_id"] == "123"

nanobot/channels/telegram/validation.py

@@ -1,7 +1,7 @@
 """Telegram setup validation owned by the channel package."""
 
 import re
-from typing import Any
+from typing import Any, cast
 from urllib.parse import urlparse
 
 import httpx
@@ -39,7 +39,7 @@ def _get_me(token: str, proxy: str | None) -> dict[str, Any]:
         response = client.get(f"https://api.telegram.org/bot{token}/getMe")
         response.raise_for_status()
         data = response.json()
-    return data if isinstance(data, dict) else {}
+    return cast(dict[str, Any], data) if isinstance(data, dict) else {}
 
 
 def validate(values: dict[str, Any], _context: ChannelValidationContext) -> dict[str, Any]:

nanobot/channels/validation.py

@@ -11,7 +11,7 @@ import re
 import socket
 import ssl
 from datetime import UTC, datetime
-from typing import Any
+from typing import Any, cast
 
 import httpx
 
@@ -76,7 +76,7 @@ def validate_channel_config(
             allow_local_service_access=config.tools.webui_allow_local_service_access,
         )
         custom_payload = setup_spec.validator(values, context)
-        if custom_payload is not None:
+        if cast(object, custom_payload) is not None:
             payload = dict(custom_payload)
             payload.setdefault("checks", [])
             payload.setdefault("missing_fields", [])
@@ -116,7 +116,7 @@ def _channel_config(
     if hasattr(section, "model_dump"):
         return dict(section.model_dump(mode="json", by_alias=True))
     if isinstance(section, dict):
-        return dict(section)
+        return dict(cast(dict[str, Any], section))
     return {}
 
 
@@ -130,9 +130,9 @@ def _merge_form_values(
     merged = dict(values)
     prefix = f"channels.{name}."
     spec = setup_spec
-    secrets = spec.secrets if spec is not None else frozenset()
+    secrets: frozenset[str] = spec.secrets if spec is not None else frozenset()
     for raw_key, raw_value in raw_values.items():
-        if not isinstance(raw_key, str) or not raw_key:
+        if not raw_key:
             continue
         field = raw_key[len(prefix):] if raw_key.startswith(prefix) else raw_key
         if field in secrets and not _str(raw_value):
@@ -281,7 +281,7 @@ def _assign(values: dict[str, Any], field: str, value: Any) -> None:
         if not isinstance(current, dict):
             current = {}
             target[part] = current
-        target = current
+        target = cast(dict[str, Any], current)
     target[parts[-1]] = value
 
 
@@ -290,7 +290,7 @@ def _get(values: dict[str, Any], field: str) -> Any:
     for part in field.split("."):
         if not isinstance(target, dict):
             return None
-        target = target.get(part)
+        target = cast(dict[str, Any], target).get(part)
     return target
 
 
@@ -346,7 +346,7 @@ def _http_get(url: str, *, headers: dict[str, str] | None = None) -> dict[str, A
         response = client.get(url, headers=headers)
         response.raise_for_status()
         data = response.json()
-    return data if isinstance(data, dict) else {}
+    return cast(dict[str, Any], data) if isinstance(data, dict) else {}
 
 
 def _http_post(url: str, *, headers: dict[str, str] | None = None) -> dict[str, Any]:
@@ -354,7 +354,7 @@ def _http_post(url: str, *, headers: dict[str, str] | None = None) -> dict[str,
         response = client.post(url, headers=headers)
         response.raise_for_status()
         data = response.json()
-    return data if isinstance(data, dict) else {}
+    return cast(dict[str, Any], data) if isinstance(data, dict) else {}
 
 
 def _probe_tcp(host: str, port: int, *, allow_loopback: bool = False) -> None:

nanobot/channels/websocket/runtime.py

@@ -11,7 +11,7 @@ import uuid
 from collections.abc import Callable
 from contextlib import suppress
 from pathlib import Path
-from typing import Any, Self
+from typing import Any, Self, TypeGuard, cast
 
 from pydantic import Field, field_validator, model_validator
 from websockets.asyncio.server import ServerConnection, serve, unix_serve
@@ -191,12 +191,13 @@ def _parse_inbound_payload(raw: str) -> str | None:
         return None
     if text.startswith("{"):
         try:
-            data = json.loads(text)
+            data = cast(object, json.loads(text))
         except json.JSONDecodeError:
             return text
         if isinstance(data, dict):
+            payload = cast(dict[str, Any], data)
             for key in ("content", "text", "message"):
-                value = data.get(key)
+                value = payload.get(key)
                 if isinstance(value, str) and value.strip():
                     return value
             return None
@@ -209,7 +210,7 @@ def _parse_inbound_payload(raw: str) -> str | None:
 _CHAT_ID_RE = re.compile(r"^[A-Za-z0-9_:-]{1,64}$")
 
 
-def _is_valid_chat_id(value: Any) -> bool:
+def _is_valid_chat_id(value: Any) -> TypeGuard[str]:
     return isinstance(value, str) and _CHAT_ID_RE.match(value) is not None
 
 
@@ -224,15 +225,16 @@ def _parse_envelope(raw: str) -> dict[str, Any] | None:
     if not text.startswith("{"):
         return None
     try:
-        data = json.loads(text)
+        data = cast(object, json.loads(text))
     except json.JSONDecodeError:
         return None
     if not isinstance(data, dict):
         return None
-    t = data.get("type")
+    envelope = cast(dict[str, Any], data)
+    t = envelope.get("type")
     if not isinstance(t, str):
         return None
-    return data
+    return envelope
 
 
 def _is_websocket_upgrade(request: WsRequest) -> bool:
@@ -264,13 +266,13 @@ class WebSocketChannel(BaseChannel):
         super().__init__(config, bus)
         self.config: WebSocketConfig = config
         # chat_id -> connections subscribed to it (fan-out target).
-        self._subs: dict[str, set[Any]] = {}
+        self._subs: dict[str, set[ServerConnection]] = {}
         # connection -> chat_ids it is subscribed to (O(1) cleanup on disconnect).
-        self._conn_chats: dict[Any, set[str]] = {}
+        self._conn_chats: dict[ServerConnection, set[str]] = {}
         # connection -> default chat_id for legacy frames that omit routing.
-        self._conn_default: dict[Any, str] = {}
+        self._conn_default: dict[ServerConnection, str] = {}
         # Connections authenticated with a one-time token from /webui/bootstrap.
-        self._webui_connections: set[Any] = set()
+        self._webui_connections: set[ServerConnection] = set()
         self._stop_event: asyncio.Event | None = None
         self._server_task: asyncio.Task[None] | None = None
 
@@ -286,15 +288,43 @@ class WebSocketChannel(BaseChannel):
 
     # -- Subscription bookkeeping -------------------------------------------
 
-    def _workspace_controls_available(self, connection: Any) -> bool:
+    def _workspace_controls_available(self, connection: ServerConnection) -> bool:
         return self._http_router.workspace_controls_available(connection)
 
-    def _attach(self, connection: Any, chat_id: str) -> None:
+    def _attach(self, connection: ServerConnection, chat_id: str) -> None:
         """Idempotently subscribe *connection* to *chat_id*."""
         self._subs.setdefault(chat_id, set()).add(connection)
         self._conn_chats.setdefault(connection, set()).add(chat_id)
 
-    def _cleanup_connection(self, connection: Any) -> None:
+    async def send_webui_protocol_error(
+        self,
+        connection: ServerConnection,
+        detail: str,
+    ) -> None:
+        """Send a stable protocol error from a WebUI-owned orchestration helper."""
+        await self._send_event(connection, "error", detail=detail)
+
+    async def attach_webui_fork(
+        self,
+        connection: ServerConnection,
+        *,
+        fork_id: str,
+        fork_key: str,
+    ) -> None:
+        """Attach and hydrate a newly created WebUI chat fork."""
+        scope = self._workspaces.scope_for_session_key(fork_key)
+        self._attach(connection, fork_id)
+        await self._send_event(connection, "attached", chat_id=fork_id)
+        await self._send_event(
+            connection,
+            "session_updated",
+            chat_id=fork_id,
+            scope="metadata",
+            workspace_scope=scope.payload(),
+        )
+        await self._hydrate_after_subscribe(fork_id)
+
+    def _cleanup_connection(self, connection: ServerConnection) -> None:
         """Remove *connection* from every subscription set; safe to call multiple times."""
         chat_ids = self._conn_chats.pop(connection, set())
         for cid in chat_ids:
@@ -317,10 +347,11 @@ class WebSocketChannel(BaseChannel):
         if self.gateway.session_manager is None:
             return
         row = self.gateway.session_manager.read_session_file(f"websocket:{chat_id}")
-        meta = row.get("metadata", {}) if isinstance(row, dict) else {}
+        row_data = row if isinstance(row, dict) else {}
+        meta = row_data.get("metadata", {})
         if not isinstance(meta, dict):
             meta = {}
-        blob = goal_state_ws_blob(meta)
+        blob = goal_state_ws_blob(cast(dict[str, Any], meta))
         if not blob.get("active"):
             return
         await self.send_goal_state(chat_id, blob)
@@ -342,7 +373,12 @@ class WebSocketChannel(BaseChannel):
         await self._maybe_push_active_goal_state(chat_id)
         await self._maybe_push_turn_run_wall_clock(chat_id)
 
-    async def _send_event(self, connection: Any, event: str, **fields: Any) -> None:
+    async def _send_event(
+        self,
+        connection: ServerConnection,
+        event: str,
+        **fields: Any,
+    ) -> None:
         """Send a control event (attached, error, ...) to a single connection."""
         payload: dict[str, Any] = {"event": event}
         payload.update(fields)
@@ -377,7 +413,7 @@ class WebSocketChannel(BaseChannel):
 
     # -- HTTP dispatch ------------------------------------------------------
 
-    async def _dispatch_http(self, connection: Any, request: WsRequest) -> Any:
+    async def _dispatch_http(self, connection: ServerConnection, request: WsRequest) -> Any:
         """Route an inbound HTTP request to the HTTP handler or WS upgrade."""
         got, query = _parse_request_path(request.path)
 
@@ -394,7 +430,11 @@ class WebSocketChannel(BaseChannel):
         # Everything else goes to the HTTP handler
         return await self._http_router.dispatch(connection, request)
 
-    def _authorize_websocket_handshake(self, connection: Any, query: dict[str, list[str]]) -> Any:
+    def _authorize_websocket_handshake(
+        self,
+        connection: ServerConnection,
+        query: dict[str, list[str]],
+    ) -> Any:
         supplied = _query_first(query, "token")
         static_token = self.config.token.strip()
 
@@ -414,7 +454,7 @@ class WebSocketChannel(BaseChannel):
             self._consume_issued_token(connection, supplied)
         return None
 
-    def _consume_issued_token(self, connection: Any, token: str) -> bool:
+    def _consume_issued_token(self, connection: ServerConnection, token: str) -> bool:
         audience = self._tokens.take_issued_token_audience(token)
         if audience == "webui":
             self._webui_connections.add(connection)
@@ -509,7 +549,7 @@ class WebSocketChannel(BaseChannel):
         self._server_task = asyncio.create_task(runner())
         await self._server_task
 
-    async def _connection_loop(self, connection: Any) -> None:
+    async def _connection_loop(self, connection: ServerConnection) -> None:
         request = connection.request
         path_part = request.path if request else "/"
         _, query = _parse_request_path(path_part)
@@ -574,7 +614,7 @@ class WebSocketChannel(BaseChannel):
 
     async def _dispatch_envelope(
         self,
-        connection: Any,
+        connection: ServerConnection,
         client_id: str,
         envelope: dict[str, Any],
     ) -> None:
@@ -700,7 +740,7 @@ class WebSocketChannel(BaseChannel):
                         **rejection_fields,
                     )
                     return
-                media_paths, reason = self._media.store_inbound_attachments(raw_media)
+                media_paths, reason = self._media.store_inbound_attachments(cast(list[Any], raw_media))
                 if reason is not None:
                     await self._send_event(
                         connection,
@@ -810,7 +850,7 @@ class WebSocketChannel(BaseChannel):
 
     async def _workspace_scope_or_error(
         self,
-        connection: Any,
+        connection: ServerConnection,
         resolver: Callable[[], Any],
         *,
         chat_id: str | None = None,
@@ -841,7 +881,8 @@ class WebSocketChannel(BaseChannel):
             try:
                 await self._server_task
             except asyncio.CancelledError:
-                if asyncio.current_task() and asyncio.current_task().cancelling():
+                current_task = asyncio.current_task()
+                if current_task is not None and current_task.cancelling():
                     raise
                 self.logger.debug("server task was already cancelled during shutdown")
             except Exception as e:
@@ -853,7 +894,13 @@ class WebSocketChannel(BaseChannel):
         self._webui_connections.clear()
         self._tokens.clear()
 
-    async def _safe_send_to(self, connection: Any, raw: str, *, label: str = "") -> None:
+    async def _safe_send_to(
+        self,
+        connection: ServerConnection,
+        raw: str,
+        *,
+        label: str = "",
+    ) -> None:
         """Send a raw frame to one connection, cleaning up on ConnectionClosed."""
         try:
             await connection.send(raw)

nanobot/channels/wecom/runtime.py

@@ -1,3 +1,4 @@
+# pyright: reportMissingTypeStubs=false
 """WeCom (Enterprise WeChat) channel implementation using wecom_aibot_sdk."""
 
 import asyncio
@@ -7,8 +8,9 @@ import importlib.util
 import os
 import re
 from collections import OrderedDict
+from collections.abc import Callable
 from pathlib import Path
-from typing import Any
+from typing import Any, cast
 
 from pydantic import Field
 
@@ -96,7 +98,7 @@ class WecomChannel(BaseChannel):
         self._client: Any = None
         self._processed_message_ids: OrderedDict[str, None] = OrderedDict()
         self._loop: asyncio.AbstractEventLoop | None = None
-        self._generate_req_id = None
+        self._generate_req_id: Callable[[str], str] | None = None
         # Store frame headers for each chat to enable replies
         self._chat_frames: dict[str, Any] = {}
 
@@ -117,7 +119,8 @@ class WecomChannel(BaseChannel):
         self._generate_req_id = generate_req_id
 
         # Create WebSocket client
-        self._client = WSClient({
+        ws_client = cast(Any, WSClient)
+        self._client = ws_client({
             "bot_id": self.config.bot_id,
             "secret": self.config.secret,
             "reconnect_interval": 1000,
@@ -195,14 +198,16 @@ class WecomChannel(BaseChannel):
         """Handle enter_chat event (user opens chat with bot)."""
         try:
             # Extract body from WsFrame dataclass or dict
-            if hasattr(frame, 'body'):
-                body = frame.body or {}
+            if hasattr(frame, "body"):
+                body: Any = frame.body or {}
             elif isinstance(frame, dict):
-                body = frame.get("body", frame)
+                frame_dict = cast(dict[str, Any], frame)
+                body = frame_dict.get("body", frame_dict)
             else:
                 body = {}
 
-            chat_id = body.get("chatid", "") if isinstance(body, dict) else ""
+            body_dict = cast(dict[str, Any], body) if isinstance(body, dict) else {}
+            chat_id = cast(str, body_dict.get("chatid", ""))
 
             if chat_id and not self.is_allowed(chat_id):
                 return
@@ -219,26 +224,32 @@ class WecomChannel(BaseChannel):
         """Process incoming message and forward to bus."""
         try:
             # Extract body from WsFrame dataclass or dict
-            if hasattr(frame, 'body'):
-                body = frame.body or {}
+            if hasattr(frame, "body"):
+                body: Any = frame.body or {}
             elif isinstance(frame, dict):
-                body = frame.get("body", frame)
+                frame_dict = cast(dict[str, Any], frame)
+                body = frame_dict.get("body", frame_dict)
             else:
                 body = {}
 
             # Ensure body is a dict
             if not isinstance(body, dict):
-                self.logger.warning("Invalid body type: {}", type(body))
+                self.logger.warning("Invalid body type: {}", type(cast(object, body)))
                 return
+            body = cast(dict[str, Any], body)
 
             # Extract message info
-            msg_id = body.get("msgid", "")
+            msg_id = cast(str, body.get("msgid", ""))
             if not msg_id:
                 msg_id = f"{body.get('chatid', '')}_{body.get('sendertime', '')}"
 
             # Extract sender info from "from" field (SDK format)
             from_info = body.get("from", {})
-            sender_id = from_info.get("userid", "unknown") if isinstance(from_info, dict) else "unknown"
+            sender_id = (
+                cast(str, cast(dict[str, Any], from_info).get("userid", "unknown"))
+                if isinstance(from_info, dict)
+                else "unknown"
+            )
             if not self.is_allowed(sender_id):
                 return
 
@@ -253,21 +264,22 @@ class WecomChannel(BaseChannel):
 
             # For single chat, chatid is the sender's userid
             # For group chat, chatid is provided in body
-            chat_type = body.get("chattype", "single")
-            chat_id = body.get("chatid", sender_id)
+            chat_type = cast(str, body.get("chattype", "single"))
+            chat_id = cast(str, body.get("chatid", sender_id))
 
-            content_parts = []
+            content_parts: list[str] = []
             media_paths: list[str] = []
 
             if msg_type == "text":
-                text = body.get("text", {}).get("content", "")
+                text_info = cast(dict[str, Any], body.get("text", {}))
+                text = cast(str, text_info.get("content", ""))
                 if text:
                     content_parts.append(text)
 
             elif msg_type == "image":
-                image_info = body.get("image", {})
-                file_url = image_info.get("url", "")
-                aes_key = image_info.get("aeskey", "")
+                image_info = cast(dict[str, Any], body.get("image", {}))
+                file_url = cast(str, image_info.get("url", ""))
+                aes_key = cast(str, image_info.get("aeskey", ""))
 
                 if file_url and aes_key:
                     file_path = await self._download_and_save_media(file_url, aes_key, "image")
@@ -281,19 +293,19 @@ class WecomChannel(BaseChannel):
                     content_parts.append("[image: download failed]")
 
             elif msg_type == "voice":
-                voice_info = body.get("voice", {})
+                voice_info = cast(dict[str, Any], body.get("voice", {}))
                 # Voice message already contains transcribed content from WeCom
-                voice_content = voice_info.get("content", "")
+                voice_content = cast(str, voice_info.get("content", ""))
                 if voice_content:
                     content_parts.append(f"[voice] {voice_content}")
                 else:
                     content_parts.append("[voice]")
 
             elif msg_type == "file":
-                file_info = body.get("file", {})
-                file_url = file_info.get("url", "")
-                aes_key = file_info.get("aeskey", "")
-                file_name = file_info.get("name") or None
+                file_info = cast(dict[str, Any], body.get("file", {}))
+                file_url = cast(str, file_info.get("url", ""))
+                aes_key = cast(str, file_info.get("aeskey", ""))
+                file_name = cast(str | None, file_info.get("name") or None)
 
                 if file_url and aes_key:
                     file_path = await self._download_and_save_media(file_url, aes_key, "file", file_name)
@@ -308,16 +320,20 @@ class WecomChannel(BaseChannel):
 
             elif msg_type == "mixed":
                 # Mixed content contains multiple message items
-                msg_items = body.get("mixed", {}).get("msg_item", [])
-                for item in msg_items:
-                    item_type = item.get("msgtype", "")
+                mixed_info = cast(dict[str, Any], body.get("mixed", {}))
+                msg_items = cast(list[Any], mixed_info.get("msg_item", []))
+                for raw_item in msg_items:
+                    item = cast(dict[str, Any], raw_item)
+                    item_type = cast(str, item.get("msgtype", ""))
                     if item_type == "text":
-                        text = item.get("text", {}).get("content", "")
+                        text_info = cast(dict[str, Any], item.get("text", {}))
+                        text = cast(str, text_info.get("content", ""))
                         if text:
                             content_parts.append(text)
                     elif item_type == "image":
-                        file_url = item.get("image", {}).get("url", "")
-                        aes_key = item.get("image", {}).get("aeskey", "")
+                        image_info = cast(dict[str, Any], item.get("image", {}))
+                        file_url = cast(str, image_info.get("url", ""))
+                        aes_key = cast(str, image_info.get("aeskey", ""))
                         if file_url and aes_key:
                             file_path = await self._download_and_save_media(file_url, aes_key, "image")
                             if file_path:
@@ -385,7 +401,7 @@ class WecomChannel(BaseChannel):
             media_dir = get_media_dir("wecom")
             if not filename:
                 filename = fname or f"{media_type}_{hash(file_url) % 100000}"
-            filename = _sanitize_filename(filename)
+            filename = _sanitize_filename(cast(str, filename))
 
             file_path = media_dir / filename
             await asyncio.to_thread(file_path.write_bytes, data)
@@ -397,8 +413,10 @@ class WecomChannel(BaseChannel):
             return None
 
     async def _upload_media_ws(
-        self, client: Any, file_path: str,
-    ) -> "tuple[str, str] | tuple[None, None]":
+        self,
+        client: Any,
+        file_path: str,
+    ) -> tuple[str, str] | tuple[None, None]:
         """Upload a local file to WeCom via WebSocket 3-step protocol (base64).
 
         Uses the WeCom WebSocket upload commands directly via
@@ -417,7 +435,7 @@ class WecomChannel(BaseChannel):
             media_type = _guess_wecom_media_type(fname)
 
             # Read file size and data in a thread to avoid blocking the event loop
-            def _read_file():
+            def _read_file() -> tuple[int, bytes]:
                 file_size = os.path.getsize(file_path)
                 if file_size > WECOM_UPLOAD_MAX_BYTES:
                     raise ValueError(
@@ -530,7 +548,10 @@ class WecomChannel(BaseChannel):
                 # Both progress and final messages must use reply_stream (cmd="aibot_respond_msg").
                 # The plain reply() uses cmd="reply" which does not support "text" msgtype
                 # and causes errcode=40008 from WeCom API.
-                stream_id = self._generate_req_id("stream")
+                generate_req_id = self._generate_req_id
+                if generate_req_id is None:
+                    raise RuntimeError("WeCom request-id generator is not initialized")
+                stream_id = generate_req_id("stream")
                 await self._client.reply_stream(
                     frame,
                     stream_id,

nanobot/channels/weixin/connect.py

@@ -4,22 +4,22 @@ from __future__ import annotations
 
 import secrets
 import time
-from contextlib import suppress
 from dataclasses import dataclass
-from typing import Any
-
-import httpx
+from typing import TYPE_CHECKING, Any, cast
 
 from nanobot.channels.connect import ChannelConnectError, QueryParams, query_first
 from nanobot.config.loader import load_config
 
+if TYPE_CHECKING:
+    from nanobot.channels.weixin.runtime import WeixinChannel
+
 
 @dataclass(slots=True)
 class WeixinConnectSession:
     id: str
     qrcode_id: str
     qr_url: str
-    channel: Any
+    channel: WeixinChannel
     current_poll_base_url: str
     refresh_count: int
     created_wall: float
@@ -58,9 +58,8 @@ class WeixinConnectStore:
         channel = self._build_channel()
         if force:
             # Preserve the working account until a replacement scan succeeds.
-            channel._token = ""
-            channel._get_updates_buf = ""
-        elif channel._load_state():
+            channel.connect_reset_pending_credentials()
+        elif channel.connect_load_state():
             return {
                 "session_id": "",
                 "status": "succeeded",
@@ -68,13 +67,9 @@ class WeixinConnectStore:
                 "interval_ms": 2000,
             }
 
-        channel._client = httpx.AsyncClient(
-            timeout=httpx.Timeout(60, connect=30),
-            follow_redirects=True,
-        )
-        channel._running = True
+        channel.connect_open_client()
         try:
-            qrcode_id, qr_url = await channel._fetch_qr_code()
+            qrcode_id, qr_url = await channel.connect_fetch_qr_code()
         except Exception as exc:
             await self._close_channel(channel)
             raise ChannelConnectError(
@@ -89,7 +84,7 @@ class WeixinConnectStore:
             qrcode_id=qrcode_id,
             qr_url=qr_url,
             channel=channel,
-            current_poll_base_url=channel.config.base_url,
+            current_poll_base_url=channel.connect_base_url,
             refresh_count=0,
             created_wall=now_wall,
             deadline=time.monotonic() + 600,
@@ -107,14 +102,12 @@ class WeixinConnectStore:
             }
 
         try:
-            status_data = await session.channel._api_get_with_base(
+            status_data = await session.channel.connect_poll_qr_code(
                 base_url=session.current_poll_base_url,
-                endpoint="ilink/bot/get_qrcode_status",
-                params={"qrcode": session.qrcode_id},
-                auth=False,
+                qrcode_id=session.qrcode_id,
             )
         except Exception as exc:
-            if session.channel._is_retryable_qr_poll_error(exc):
+            if session.channel.connect_poll_error_is_retryable(exc):
                 session.last_error = str(exc)
                 return self._pending_payload(session)
             self._sessions.pop(session_id, None)
@@ -125,10 +118,8 @@ class WeixinConnectStore:
                 "message": f"WeChat QR login failed: {exc}",
             }
 
-        if not isinstance(status_data, dict):
-            return self._pending_payload(session)
-
-        status = status_data.get("status", "")
+        status_payload = status_data
+        status = status_payload.get("status", "")
         if status == "confirmed":
             if self._sessions.get(session_id) is not session:
                 return {
@@ -136,7 +127,7 @@ class WeixinConnectStore:
                     "status": "cancelled",
                     "message": "WeChat login cancelled.",
                 }
-            token = str(status_data.get("bot_token", "") or "")
+            token = str(status_payload.get("bot_token", "") or "")
             if not token:
                 self._sessions.pop(session_id, None)
                 await self._close_channel(session.channel)
@@ -145,22 +136,19 @@ class WeixinConnectStore:
                     "status": "failed",
                     "message": "WeChat confirmed the scan but returned no token.",
                 }
-            base_url = str(status_data.get("baseurl", "") or "")
-            session.channel._token = token
-            if base_url:
-                session.channel.config.base_url = base_url
-            session.channel._save_state()
+            base_url = str(status_payload.get("baseurl", "") or "")
+            session.channel.connect_commit_account(token=token, base_url=base_url)
             self._sessions.pop(session_id, None)
             await self._close_channel(session.channel)
             return {
                 "session_id": session_id,
                 "status": "succeeded",
                 "message": "WeChat is connected.",
-                "account": str(status_data.get("ilink_user_id", "") or ""),
+                "account": str(status_payload.get("ilink_user_id", "") or ""),
             }
 
         if status == "scaned_but_redirect":
-            redirect_host = str(status_data.get("redirect_host", "") or "").strip()
+            redirect_host = str(status_payload.get("redirect_host", "") or "").strip()
             if redirect_host:
                 session.current_poll_base_url = (
                     redirect_host
@@ -182,7 +170,9 @@ class WeixinConnectStore:
                     "message": "This WeChat QR code expired. Start again.",
                 }
             try:
-                session.qrcode_id, session.qr_url = await session.channel._fetch_qr_code()
+                session.qrcode_id, session.qr_url = (
+                    await session.channel.connect_fetch_qr_code()
+                )
             except Exception as exc:
                 self._sessions.pop(session_id, None)
                 await self._close_channel(session.channel)
@@ -191,7 +181,7 @@ class WeixinConnectStore:
                     "status": "failed",
                     "message": f"Could not refresh WeChat QR code: {exc}",
                 }
-            session.current_poll_base_url = session.channel.config.base_url
+            session.current_poll_base_url = session.channel.connect_base_url
             return self._pending_payload(session)
 
         return self._pending_payload(session)
@@ -219,27 +209,22 @@ class WeixinConnectStore:
                 await self._close_channel(session.channel)
 
     @staticmethod
-    def _build_channel() -> Any:
+    def _build_channel() -> WeixinChannel:
         from nanobot.bus.queue import MessageBus
         from nanobot.channels.weixin.runtime import WeixinChannel
 
         section = getattr(load_config().channels, "weixin", None)
-        if hasattr(section, "model_dump"):
+        if section is not None and hasattr(section, "model_dump"):
             config = section.model_dump(mode="json", by_alias=True)
         elif isinstance(section, dict):
-            config = dict(section)
+            config = dict(cast(dict[str, Any], section))
         else:
             config = {}
         return WeixinChannel(config, MessageBus())
 
     @staticmethod
-    async def _close_channel(channel: Any) -> None:
-        channel._running = False
-        client = getattr(channel, "_client", None)
-        if client is not None:
-            with suppress(Exception):
-                await client.aclose()
-            channel._client = None
+    async def _close_channel(channel: WeixinChannel) -> None:
+        await channel.connect_close_client()
 
     @staticmethod
     def _start_payload(session: WeixinConnectSession) -> dict[str, Any]:

nanobot/channels/weixin/runtime.py

@@ -21,7 +21,7 @@ import uuid
 from collections import OrderedDict
 from contextlib import suppress
 from pathlib import Path
-from typing import Any
+from typing import Any, cast
 from urllib.parse import quote
 
 import httpx
@@ -168,10 +168,10 @@ class WeixinChannel(BaseChannel):
         self._processed_ids: OrderedDict[str, None] = OrderedDict()
         self._state_dir: Path | None = None
         self._token: str = ""
-        self._poll_task: asyncio.Task | None = None
+        self._poll_task: asyncio.Task[None] | None = None
         self._next_poll_timeout_s: int = DEFAULT_LONG_POLL_TIMEOUT_S
         self._session_pause_until: float = 0.0
-        self._typing_tasks: dict[str, asyncio.Task] = {}
+        self._typing_tasks: dict[str, asyncio.Task[None]] = {}
         self._typing_tickets: dict[str, dict[str, Any]] = {}
         self._context_token_at: dict[str, float] = {}
         self._pending_tool_hints: dict[str, list[str]] = {}
@@ -201,14 +201,14 @@ class WeixinChannel(BaseChannel):
         if not state_file.exists():
             return False
         try:
-            data = json.loads(state_file.read_text())
+            data = cast(dict[str, Any], json.loads(state_file.read_text()))
             self._token = data.get("token", "")
             self._get_updates_buf = data.get("get_updates_buf", "")
             context_tokens = data.get("context_tokens", {})
             if isinstance(context_tokens, dict):
                 self._context_tokens = {
                     str(user_id): str(token)
-                    for user_id, token in context_tokens.items()
+                    for user_id, token in cast(dict[object, object], context_tokens).items()
                     if str(user_id).strip() and str(token).strip()
                 }
             else:
@@ -216,8 +216,8 @@ class WeixinChannel(BaseChannel):
             typing_tickets = data.get("typing_tickets", {})
             if isinstance(typing_tickets, dict):
                 self._typing_tickets = {
-                    str(user_id): ticket
-                    for user_id, ticket in typing_tickets.items()
+                    str(user_id): cast(dict[str, Any], ticket)
+                    for user_id, ticket in cast(dict[object, object], typing_tickets).items()
                     if str(user_id).strip() and isinstance(ticket, dict)
                 }
             else:
@@ -276,18 +276,22 @@ class WeixinChannel(BaseChannel):
         if isinstance(err, httpx.TimeoutException | httpx.TransportError):
             return True
         if isinstance(err, httpx.HTTPStatusError):
-            status_code = err.response.status_code if err.response is not None else 0
+            status_code = (
+                err.response.status_code
+                if cast(object, err.response) is not None
+                else 0
+            )
             return status_code >= 500
         return False
 
     async def _api_get(
         self,
         endpoint: str,
-        params: dict | None = None,
+        params: dict[str, Any] | None = None,
         *,
         auth: bool = True,
         extra_headers: dict[str, str] | None = None,
-    ) -> dict:
+    ) -> dict[str, Any]:
         assert self._client is not None
         url = f"{self.config.base_url}/{endpoint}"
         hdrs = self._make_headers(auth=auth)
@@ -295,17 +299,17 @@ class WeixinChannel(BaseChannel):
             hdrs.update(extra_headers)
         resp = await self._client.get(url, params=params, headers=hdrs)
         resp.raise_for_status()
-        return resp.json()
+        return cast(dict[str, Any], resp.json())
 
     async def _api_get_with_base(
         self,
         *,
         base_url: str,
         endpoint: str,
-        params: dict | None = None,
+        params: dict[str, Any] | None = None,
         auth: bool = True,
         extra_headers: dict[str, str] | None = None,
-    ) -> dict:
+    ) -> dict[str, Any]:
         """GET helper that allows overriding base_url for QR redirect polling."""
         assert self._client is not None
         url = f"{base_url.rstrip('/')}/{endpoint}"
@@ -314,15 +318,15 @@ class WeixinChannel(BaseChannel):
             hdrs.update(extra_headers)
         resp = await self._client.get(url, params=params, headers=hdrs)
         resp.raise_for_status()
-        return resp.json()
+        return cast(dict[str, Any], resp.json())
 
     async def _api_post(
         self,
         endpoint: str,
-        body: dict | None = None,
+        body: dict[str, Any] | None = None,
         *,
         auth: bool = True,
-    ) -> dict:
+    ) -> dict[str, Any]:
         assert self._client is not None
         url = f"{self.config.base_url}/{endpoint}"
         payload = body or {}
@@ -330,7 +334,7 @@ class WeixinChannel(BaseChannel):
             payload["base_info"] = BASE_INFO
         resp = await self._client.post(url, json=payload, headers=self._make_headers(auth=auth))
         resp.raise_for_status()
-        return resp.json()
+        return cast(dict[str, Any], resp.json())
 
     # ------------------------------------------------------------------
     # QR Code Login  (matches login-qr.ts)
@@ -343,8 +347,8 @@ class WeixinChannel(BaseChannel):
             params={"bot_type": "3"},
             auth=False,
         )
-        qrcode_img_content = data.get("qrcode_img_content", "")
-        qrcode_id = data.get("qrcode", "")
+        qrcode_img_content = cast(str, data.get("qrcode_img_content", ""))
+        qrcode_id = cast(str, data.get("qrcode", ""))
         if not qrcode_id:
             raise RuntimeError(f"Failed to get QR code from WeChat API: {data}")
         return qrcode_id, (qrcode_img_content or qrcode_id)
@@ -371,7 +375,7 @@ class WeixinChannel(BaseChannel):
                         continue
                     raise
 
-                if not isinstance(status_data, dict):
+                if not isinstance(cast(object, status_data), dict):
                     await asyncio.sleep(1)
                     continue
 
@@ -431,15 +435,73 @@ class WeixinChannel(BaseChannel):
         if isinstance(err, httpx.TimeoutException | httpx.TransportError):
             return True
         if isinstance(err, httpx.HTTPStatusError):
-            status_code = err.response.status_code if err.response is not None else 0
+            status_code = (
+                err.response.status_code
+                if cast(object, err.response) is not None
+                else 0
+            )
             if status_code >= 500:
                 return True
         return False
 
+    @property
+    def connect_base_url(self) -> str:
+        """Base URL currently selected for the interactive connection flow."""
+        return self.config.base_url
+
+    def connect_reset_pending_credentials(self) -> None:
+        """Clear only in-memory credentials while a replacement QR login is pending."""
+        self._token = ""
+        self._get_updates_buf = ""
+
+    def connect_load_state(self) -> bool:
+        """Load an existing account for the interactive connection flow."""
+        return self._load_state()
+
+    def connect_open_client(self) -> None:
+        """Open the short-lived HTTP client used by WebUI QR login."""
+        self._client = httpx.AsyncClient(
+            timeout=httpx.Timeout(60, connect=30),
+            follow_redirects=True,
+        )
+        self._running = True
+
+    async def connect_fetch_qr_code(self) -> tuple[str, str]:
+        return await self._fetch_qr_code()
+
+    async def connect_poll_qr_code(
+        self,
+        *,
+        base_url: str,
+        qrcode_id: str,
+    ) -> dict[str, Any]:
+        return await self._api_get_with_base(
+            base_url=base_url,
+            endpoint="ilink/bot/get_qrcode_status",
+            params={"qrcode": qrcode_id},
+            auth=False,
+        )
+
+    def connect_poll_error_is_retryable(self, err: Exception) -> bool:
+        return self._is_retryable_qr_poll_error(err)
+
+    def connect_commit_account(self, *, token: str, base_url: str) -> None:
+        self._token = token
+        if base_url:
+            self.config.base_url = base_url
+        self._save_state()
+
+    async def connect_close_client(self) -> None:
+        self._running = False
+        if self._client is not None:
+            with suppress(Exception):
+                await self._client.aclose()
+            self._client = None
+
     @staticmethod
     def _print_qr_code(url: str) -> None:
         try:
-            import qrcode as qr_lib
+            import qrcode as qr_lib  # pyright: ignore[reportMissingModuleSource]
 
             qr = qr_lib.QRCode(border=1)
             qr.add_data(url)
@@ -596,7 +658,7 @@ class WeixinChannel(BaseChannel):
             self._save_state()
 
         # Process messages (WeixinMessage[] from types.ts)
-        msgs: list[dict] = data.get("msgs", []) or []
+        msgs = cast(list[dict[str, Any]], data.get("msgs", []) or [])
         for msg in msgs:
             try:
                 await self._process_message(msg)
@@ -607,7 +669,7 @@ class WeixinChannel(BaseChannel):
     # Inbound message processing  (matches inbound.ts + process-message.ts)
     # ------------------------------------------------------------------
 
-    async def _process_message(self, msg: dict) -> None:
+    async def _process_message(self, msg: dict[str, Any]) -> None:
         """Process a single WeixinMessage from getUpdates."""
         # Skip bot's own messages (message_type 2 = BOT)
         if msg.get("message_type") == MESSAGE_TYPE_BOT:
@@ -679,7 +741,7 @@ class WeixinChannel(BaseChannel):
             self._save_state()
 
         # Parse item_list (WeixinMessage.item_list — types.ts:161)
-        item_list: list[dict] = msg.get("item_list") or []
+        item_list = cast(list[dict[str, Any]], msg.get("item_list") or [])
         content_parts: list[str] = []
         media_paths: list[str] = []
         has_top_level_downloadable_media = False
@@ -688,12 +750,16 @@ class WeixinChannel(BaseChannel):
             item_type = item.get("type", 0)
 
             if item_type == ITEM_TEXT:
-                text = (item.get("text_item") or {}).get("text", "")
+                text_item = cast(dict[str, Any], item.get("text_item") or {})
+                text = cast(str, text_item.get("text", ""))
                 if text:
                     # Handle quoted/ref messages (inbound.ts:86-98)
-                    ref = item.get("ref_msg")
+                    ref = cast(dict[str, Any] | None, item.get("ref_msg"))
                     if ref:
-                        ref_item = ref.get("message_item")
+                        ref_item = cast(
+                            dict[str, Any] | None,
+                            ref.get("message_item"),
+                        )
                         # If quoted message is media, just pass the text
                         if ref_item and ref_item.get("type", 0) in (
                             ITEM_IMAGE,
@@ -705,9 +771,13 @@ class WeixinChannel(BaseChannel):
                         else:
                             parts: list[str] = []
                             if ref.get("title"):
-                                parts.append(ref["title"])
+                                parts.append(cast(str, ref["title"]))
                             if ref_item:
-                                ref_text = (ref_item.get("text_item") or {}).get("text", "")
+                                ref_text_item = cast(
+                                    dict[str, Any],
+                                    ref_item.get("text_item") or {},
+                                )
+                                ref_text = cast(str, ref_text_item.get("text", ""))
                                 if ref_text:
                                     parts.append(ref_text)
                             if parts:
@@ -718,7 +788,7 @@ class WeixinChannel(BaseChannel):
                         content_parts.append(text)
 
             elif item_type == ITEM_IMAGE:
-                image_item = item.get("image_item") or {}
+                image_item = cast(dict[str, Any], item.get("image_item") or {})
                 if _has_downloadable_media_locator(image_item.get("media")):
                     has_top_level_downloadable_media = True
                 file_path = await self._download_media_item(image_item, "image")
@@ -729,9 +799,9 @@ class WeixinChannel(BaseChannel):
                     content_parts.append("[image]")
 
             elif item_type == ITEM_VOICE:
-                voice_item = item.get("voice_item") or {}
+                voice_item = cast(dict[str, Any], item.get("voice_item") or {})
                 # Voice-to-text provided by WeChat (inbound.ts:101-103)
-                voice_text = voice_item.get("text", "")
+                voice_text = cast(str, voice_item.get("text", ""))
                 if voice_text:
                     content_parts.append(f"[voice] {voice_text}")
                 else:
@@ -749,10 +819,10 @@ class WeixinChannel(BaseChannel):
                         content_parts.append("[voice]")
 
             elif item_type == ITEM_FILE:
-                file_item = item.get("file_item") or {}
+                file_item = cast(dict[str, Any], item.get("file_item") or {})
                 if _has_downloadable_media_locator(file_item.get("media")):
                     has_top_level_downloadable_media = True
-                file_name = file_item.get("file_name", "unknown")
+                file_name = cast(str, file_item.get("file_name", "unknown"))
                 file_path = await self._download_media_item(
                     file_item,
                     "file",
@@ -765,7 +835,7 @@ class WeixinChannel(BaseChannel):
                     content_parts.append(f"[file: {file_name}]")
 
             elif item_type == ITEM_VIDEO:
-                video_item = item.get("video_item") or {}
+                video_item = cast(dict[str, Any], item.get("video_item") or {})
                 if _has_downloadable_media_locator(video_item.get("media")):
                     has_top_level_downloadable_media = True
                 file_path = await self._download_media_item(video_item, "video")
@@ -783,8 +853,8 @@ class WeixinChannel(BaseChannel):
             for item in item_list:
                 if item.get("type", 0) != ITEM_TEXT:
                     continue
-                ref = item.get("ref_msg") or {}
-                candidate = ref.get("message_item") or {}
+                ref = cast(dict[str, Any], item.get("ref_msg") or {})
+                candidate = cast(dict[str, Any], ref.get("message_item") or {})
                 if candidate.get("type", 0) in (ITEM_IMAGE, ITEM_VOICE, ITEM_FILE, ITEM_VIDEO):
                     ref_media_item = candidate
                     break
@@ -792,13 +862,19 @@ class WeixinChannel(BaseChannel):
             if ref_media_item:
                 ref_type = ref_media_item.get("type", 0)
                 if ref_type == ITEM_IMAGE:
-                    image_item = ref_media_item.get("image_item") or {}
+                    image_item = cast(
+                        dict[str, Any],
+                        ref_media_item.get("image_item") or {},
+                    )
                     file_path = await self._download_media_item(image_item, "image")
                     if file_path:
                         content_parts.append(f"[image]\n[Image: source: {file_path}]")
                         media_paths.append(file_path)
                 elif ref_type == ITEM_VOICE:
-                    voice_item = ref_media_item.get("voice_item") or {}
+                    voice_item = cast(
+                        dict[str, Any],
+                        ref_media_item.get("voice_item") or {},
+                    )
                     file_path = await self._download_media_item(voice_item, "voice")
                     if file_path:
                         transcription = await self.transcribe_audio(file_path)
@@ -808,14 +884,20 @@ class WeixinChannel(BaseChannel):
                             content_parts.append(f"[voice]\n[Audio: source: {file_path}]")
                         media_paths.append(file_path)
                 elif ref_type == ITEM_FILE:
-                    file_item = ref_media_item.get("file_item") or {}
-                    file_name = file_item.get("file_name", "unknown")
+                    file_item = cast(
+                        dict[str, Any],
+                        ref_media_item.get("file_item") or {},
+                    )
+                    file_name = cast(str, file_item.get("file_name", "unknown"))
                     file_path = await self._download_media_item(file_item, "file", file_name)
                     if file_path:
                         content_parts.append(f"[file: {file_name}]\n[File: source: {file_path}]")
                         media_paths.append(file_path)
                 elif ref_type == ITEM_VIDEO:
-                    video_item = ref_media_item.get("video_item") or {}
+                    video_item = cast(
+                        dict[str, Any],
+                        ref_media_item.get("video_item") or {},
+                    )
                     file_path = await self._download_media_item(video_item, "video")
                     if file_path:
                         content_parts.append(f"[video]\n[Video: source: {file_path}]")
@@ -848,13 +930,13 @@ class WeixinChannel(BaseChannel):
 
     async def _download_media_item(
         self,
-        typed_item: dict,
+        typed_item: dict[str, Any],
         media_type: str,
         filename: str | None = None,
     ) -> str | None:
         """Download + AES-decrypt a media item. Returns local path or None."""
         try:
-            media = typed_item.get("media") or {}
+            media = cast(dict[str, Any], typed_item.get("media") or {})
             encrypt_query_param = str(media.get("encrypt_query_param", "") or "")
             full_url = str(media.get("full_url", "") or "").strip()
 
@@ -865,8 +947,8 @@ class WeixinChannel(BaseChannel):
             # image_item.aeskey is a raw hex string (16 bytes as 32 hex chars).
             # media.aes_key is always base64-encoded.
             # For images, prefer image_item.aeskey; for others use media.aes_key.
-            raw_aeskey_hex = typed_item.get("aeskey", "")
-            media_aes_key_b64 = media.get("aes_key", "")
+            raw_aeskey_hex = cast(str, typed_item.get("aeskey", ""))
+            media_aes_key_b64 = cast(str, media.get("aes_key", ""))
 
             aes_key_b64: str = ""
             if raw_aeskey_hex:
@@ -1160,7 +1242,7 @@ class WeixinChannel(BaseChannel):
                 await self._send_typing(msg.chat_id, typing_ticket, TYPING_STATUS_TYPING)
 
         typing_keepalive_stop = asyncio.Event()
-        typing_keepalive_task: asyncio.Task | None = None
+        typing_keepalive_task: asyncio.Task[None] | None = None
         if typing_ticket:
             typing_keepalive_task = asyncio.create_task(
                 self._typing_keepalive_loop(msg.chat_id, typing_ticket, typing_keepalive_stop)
@@ -1183,7 +1265,7 @@ class WeixinChannel(BaseChannel):
                 except httpx.HTTPStatusError as http_err:
                     status_code = (
                         http_err.response.status_code
-                        if http_err.response is not None
+                        if cast(object, http_err.response) is not None
                         else 0
                     )
                     if status_code >= 500:
@@ -1192,7 +1274,7 @@ class WeixinChannel(BaseChannel):
                             "Server error ({} {}) sending media {}",
                             status_code,
                             http_err.response.reason_phrase
-                            if http_err.response is not None
+                            if cast(object, http_err.response) is not None
                             else "",
                             media_path,
                         )
@@ -1342,7 +1424,7 @@ class WeixinChannel(BaseChannel):
         """Send a text message matching the exact protocol from send.ts."""
         client_id = f"nanobot-{uuid.uuid4().hex[:12]}"
 
-        item_list: list[dict] = []
+        item_list: list[dict[str, Any]] = []
         if text:
             item_list.append({"type": ITEM_TEXT, "text_item": {"text": text}})
 
@@ -1496,7 +1578,9 @@ class WeixinChannel(BaseChannel):
 
         # Send each media item as its own message (matching reference plugin)
         client_id = f"nanobot-{uuid.uuid4().hex[:12]}"
-        item_list: list[dict] = [{"type": item_type, item_key: media_item}]
+        item_list: list[dict[str, Any]] = [
+            {"type": item_type, item_key: media_item}
+        ]
 
         weixin_msg: dict[str, Any] = {
             "from_user_id": "",
@@ -1565,7 +1649,8 @@ def _encrypt_aes_ecb(data: bytes, aes_key_b64: str) -> bytes:
     with suppress(ImportError):
         from Crypto.Cipher import AES
 
-        cipher = AES.new(key, AES.MODE_ECB)
+        aes_module = cast(Any, AES)
+        cipher = aes_module.new(key, aes_module.MODE_ECB)
         return cipher.encrypt(padded)
 
     try:
@@ -1595,7 +1680,8 @@ def _decrypt_aes_ecb(data: bytes, aes_key_b64: str) -> bytes:
     with suppress(ImportError):
         from Crypto.Cipher import AES
 
-        cipher = AES.new(key, AES.MODE_ECB)
+        aes_module = cast(Any, AES)
+        cipher = aes_module.new(key, aes_module.MODE_ECB)
         decrypted = cipher.decrypt(data)
 
     if decrypted is None:

nanobot/channels/whatsapp/runtime.py

@@ -1,3 +1,4 @@
+# pyright: reportConstantRedefinition=false, reportMissingTypeStubs=false, reportUnusedFunction=false
 """WhatsApp channel implementation using neonize."""
 
 from __future__ import annotations
@@ -10,7 +11,7 @@ import time
 from collections import OrderedDict
 from contextlib import suppress
 from pathlib import Path
-from typing import Any, Literal, NamedTuple
+from typing import Any, Literal, NamedTuple, cast
 
 from pydantic import Field
 
@@ -100,7 +101,8 @@ def _has_field(message: Any, name: str) -> bool:
     list_fields = getattr(message, "ListFields", None)
     if callable(list_fields):
         try:
-            return any(getattr(field, "name", "") == name for field, _ in list_fields())
+            fields = cast(list[tuple[Any, Any]], list_fields())
+            return any(getattr(field, "name", "") == name for field, _ in fields)
         except Exception:
             pass
 
@@ -277,7 +279,10 @@ class WhatsAppChannel(BaseChannel):
         return WhatsAppConfig().model_dump(by_alias=True)
 
     def __init__(self, config: Any, bus: MessageBus):
-        legacy_bridge_fields = _legacy_bridge_config_fields(config) if isinstance(config, dict) else []
+        legacy_bridge_fields = (
+            _legacy_bridge_config_fields(cast(dict[str, Any], config))
+            if isinstance(config, dict) else []
+        )
         if isinstance(config, dict):
             config = WhatsAppConfig.model_validate(config)
         super().__init__(config, bus)
@@ -649,12 +654,13 @@ class WhatsAppChannel(BaseChannel):
         if not self._self_jids:
             return False
         for context in _context_infos(message):
-            mentioned = (
+            raw_mentioned: Any = (
                 _safe_attr(context, "mentionedJID")
                 or _safe_attr(context, "mentionedJid")
                 or _safe_attr(context, "mentioned_jid")
                 or []
             )
+            mentioned: list[Any] = cast(list[Any], raw_mentioned)
             for jid in mentioned:
                 normalized = _normalize_jid(jid)
                 if normalized in self._self_jids or _bare_jid(normalized) in self._self_jids:

nanobot/cli/commands.py

@@ -1,15 +1,23 @@
 """CLI commands for nanobot."""
 
+# pyright: reportConstantRedefinition=false, reportMissingTypeStubs=false, reportPrivateUsage=false, reportUnusedFunction=false
+
 import asyncio
 import os
 import select
 import signal
 import sys
 import time
-from collections.abc import Callable, Iterable
+from collections.abc import Awaitable, Callable, Coroutine, Iterable
 from contextlib import nullcontext, suppress
 from pathlib import Path
-from typing import Any
+from types import FrameType
+from typing import TYPE_CHECKING, Any, Literal, cast
+
+if TYPE_CHECKING:
+    from nanobot.gateway.runtime import GatewayRuntime
+    from nanobot.providers.registry import ProviderSpec
+
 
 # Force UTF-8 encoding for Windows console
 if sys.platform == "win32":
@@ -17,8 +25,10 @@ if sys.platform == "win32":
         os.environ["PYTHONIOENCODING"] = "utf-8"
         # Re-open stdout/stderr with UTF-8 encoding
         with suppress(Exception):
-            sys.stdout.reconfigure(encoding="utf-8", errors="replace")
-            sys.stderr.reconfigure(encoding="utf-8", errors="replace")
+            for stream in (sys.stdout, sys.stderr):
+                reconfigure = getattr(stream, "reconfigure", None)
+                if callable(reconfigure):
+                    reconfigure(encoding="utf-8", errors="replace")
 
 # Keep console encoding setup before importing CLI UI/logging libraries.
 import typer  # noqa: E402
@@ -52,6 +62,7 @@ from prompt_toolkit.application import run_in_terminal  # noqa: E402
 from prompt_toolkit.formatted_text import ANSI, HTML  # noqa: E402
 from prompt_toolkit.history import FileHistory  # noqa: E402
 from prompt_toolkit.key_binding import KeyBindings  # noqa: E402
+from prompt_toolkit.key_binding.key_processor import KeyPressEvent  # noqa: E402
 from prompt_toolkit.keys import Keys  # noqa: E402
 from prompt_toolkit.patch_stdout import patch_stdout  # noqa: E402
 from pydantic import ValidationError  # noqa: E402
@@ -139,7 +150,7 @@ def _ensure_interactive_tty_mode() -> None:
 def _install_gateway_shutdown_handlers(
     loop: asyncio.AbstractEventLoop,
     shutdown_event: asyncio.Event,
-    tasks: list[asyncio.Task],
+    tasks: list[asyncio.Task[Any]],
     print_status: Callable[[str], None],
 ) -> Callable[[], None]:
     """Install foreground gateway signal handlers and return a restore callback."""
@@ -298,8 +309,8 @@ def _pick_heartbeat_target_from_sessions(
 # CLI input: prompt_toolkit for editing, paste, history, and display
 # ---------------------------------------------------------------------------
 
-_PROMPT_SESSION: PromptSession | None = None
-_SAVED_TERM_ATTRS = None  # original termios settings, restored on exit
+_PROMPT_SESSION: PromptSession[str] | None = None
+_saved_term_attrs: list[Any] | None = None  # original termios settings, restored on exit
 
 
 def _flush_pending_tty_input() -> None:
@@ -328,12 +339,12 @@ def _flush_pending_tty_input() -> None:
 
 def _restore_terminal() -> None:
     """Restore terminal to its original state (echo, line buffering, etc.)."""
-    if _SAVED_TERM_ATTRS is None:
+    if _saved_term_attrs is None:
         return
     with suppress(Exception):
         import termios
 
-        termios.tcsetattr(sys.stdin.fileno(), termios.TCSADRAIN, _SAVED_TERM_ATTRS)
+        termios.tcsetattr(sys.stdin.fileno(), termios.TCSADRAIN, _saved_term_attrs)
 
 
 def _build_cli_key_bindings() -> KeyBindings:
@@ -357,20 +368,20 @@ def _build_cli_key_bindings() -> KeyBindings:
     kb = KeyBindings()
 
     @kb.add("enter")
-    def _(event):
+    def _(event: KeyPressEvent) -> None:
         event.current_buffer.validate_and_handle()
 
     @kb.add("escape", "enter")  # Alt+Enter / Meta+Enter (ESC + CR, "\x1b\r")
-    def _(event):
+    def _(event: KeyPressEvent) -> None:
         event.current_buffer.insert_text("\n")
 
     # LF-as-Enter terminals send Alt+Enter as ESC + LF rather than ESC + CR.
     @kb.add("escape", Keys.ControlJ)  # Alt+Enter on LF-as-Enter terminals
-    def _(event):
+    def _(event: KeyPressEvent) -> None:
         event.current_buffer.insert_text("\n")
 
     @kb.add(Keys.ControlF3)  # Shift+Enter on CSI-u capable terminals
-    def _(event):
+    def _(event: KeyPressEvent) -> None:
         event.current_buffer.insert_text("\n")
 
     return kb
@@ -378,13 +389,13 @@ def _build_cli_key_bindings() -> KeyBindings:
 
 def _init_prompt_session() -> None:
     """Create the prompt_toolkit session with persistent file history."""
-    global _PROMPT_SESSION, _SAVED_TERM_ATTRS
+    global _PROMPT_SESSION, _saved_term_attrs
 
     # Save terminal state so we can restore it on exit
     with suppress(Exception):
         import termios
 
-        _SAVED_TERM_ATTRS = termios.tcgetattr(sys.stdin.fileno())
+        _saved_term_attrs = termios.tcgetattr(sys.stdin.fileno())
 
     from nanobot.config.paths import get_cli_history_path
 
@@ -405,11 +416,14 @@ def _make_console() -> Console:
     return Console(file=sys.stdout)
 
 
-def _render_interactive_ansi(render_fn) -> str:
+def _render_interactive_ansi(render_fn: Callable[[Console], None]) -> str:
     """Render Rich output to ANSI so prompt_toolkit can print it safely."""
     ansi_console = Console(
         force_terminal=sys.stdout.isatty(),
-        color_system=console.color_system or "standard",
+        color_system=cast(
+            Literal["auto", "standard", "256", "truecolor", "windows"],
+            console.color_system or "standard",
+        ),
         width=console.width,
     )
     with ansi_console.capture() as capture:
@@ -420,7 +434,7 @@ def _render_interactive_ansi(render_fn) -> str:
 def _print_agent_response(
     response: str,
     render_markdown: bool,
-    metadata: dict | None = None,
+    metadata: dict[str, Any] | None = None,
     show_header: bool = True,
 ) -> None:
     """Render assistant response with consistent terminal styling."""
@@ -434,7 +448,9 @@ def _print_agent_response(
     console.print()
 
 
-def _response_renderable(content: str, render_markdown: bool, metadata: dict | None = None):
+def _response_renderable(
+    content: str, render_markdown: bool, metadata: dict[str, Any] | None = None
+) -> Text | Markdown:
     """Render plain-text command output without markdown collapsing newlines."""
     if not render_markdown:
         return Text(content)
@@ -457,19 +473,19 @@ async def _print_interactive_line(text: str) -> None:
 async def _print_interactive_response(
     response: str,
     render_markdown: bool,
-    metadata: dict | None = None,
+    metadata: dict[str, Any] | None = None,
 ) -> None:
     """Print async interactive replies with prompt_toolkit-safe Rich styling."""
     def _write() -> None:
         content = response or ""
-        ansi = _render_interactive_ansi(
-            lambda c: (
-                c.print(),
-                c.print(f"[cyan]{__logo__} nanobot[/cyan]"),
-                c.print(_response_renderable(content, render_markdown, metadata)),
-                c.print(),
-            )
-        )
+
+        def _render(target: Console) -> None:
+            target.print()
+            target.print(f"[cyan]{__logo__} nanobot[/cyan]")
+            target.print(_response_renderable(content, render_markdown, metadata))
+            target.print()
+
+        ansi = _render_interactive_ansi(_render)
         print_formatted_text(ANSI(ansi), end="")
 
     await run_in_terminal(_write)
@@ -663,10 +679,11 @@ def onboard(
             loaded.agents.defaults.workspace = workspace
         return loaded
 
+    loaded_config: Config | None = None
     # Create or update config
     if config_path.exists():
         if wizard:
-            config = _apply_workspace_override(load_config(config_path))
+            loaded_config = _apply_workspace_override(load_config(config_path))
         else:
             should_refresh = non_interactive_refresh
             if not non_interactive_refresh:
@@ -678,37 +695,39 @@ def onboard(
                     "  [bold]N[/bold] = refresh config, keeping existing values and adding new fields"
                 )
                 if typer.confirm("Overwrite?"):
-                    config = _apply_workspace_override(Config())
-                    save_config(config, config_path)
+                    loaded_config = _apply_workspace_override(Config())
+                    save_config(loaded_config, config_path)
                     console.print(f"[green]✓[/green] Config reset to defaults at {config_path}")
                 else:
                     should_refresh = True
 
             if should_refresh:
-                config = _apply_workspace_override(load_config(config_path))
-                save_config(config, config_path)
+                loaded_config = _apply_workspace_override(load_config(config_path))
+                save_config(loaded_config, config_path)
                 console.print(
                     f"[green]✓[/green] Config refreshed at {config_path} (existing values preserved)"
                 )
     else:
-        config = _apply_workspace_override(Config())
+        loaded_config = _apply_workspace_override(Config())
         # In wizard mode, don't save yet - the wizard will handle saving if should_save=True
         if not wizard:
-            save_config(config, config_path)
+            save_config(loaded_config, config_path)
             console.print(f"[green]✓[/green] Created config at {config_path}")
 
+    assert loaded_config is not None
+
     # Run interactive wizard if enabled
     if wizard:
         from nanobot.cli.onboard import run_onboard
 
         try:
-            result = run_onboard(initial_config=config)
+            result = run_onboard(initial_config=loaded_config)
             if not result.should_save:
                 console.print("[yellow]Configuration discarded. No changes were saved.[/yellow]")
                 return
 
-            config = result.config
-            save_config(config, config_path)
+            loaded_config = result.config
+            save_config(loaded_config, config_path)
             console.print(f"[green]✓[/green] Config saved at {config_path}")
         except Exception as e:
             console.print(f"[red]✗[/red] Error during configuration: {e}")
@@ -717,7 +736,7 @@ def onboard(
     _onboard_plugins(config_path)
 
     # Create workspace, preferring the configured workspace path.
-    workspace_path = get_workspace_path(config.workspace_path)
+    workspace_path = get_workspace_path(loaded_config.workspace_path)
     if not workspace_path.exists():
         workspace_path.mkdir(parents=True, exist_ok=True)
         console.print(f"[green]✓[/green] Created workspace at {workspace_path}")
@@ -1000,7 +1019,7 @@ def _webui_config_dict(config: Config) -> dict[str, Any]:
     """Return the current WebSocket config as a mutable alias-key dictionary."""
     from nanobot.channels.websocket.runtime import WebSocketConfig
 
-    current = getattr(config.channels, "websocket", None) or {}
+    current: Any = getattr(config.channels, "websocket", None) or {}
     model = WebSocketConfig.model_validate(current)
     return model.model_dump(by_alias=True, exclude_none=True)
 
@@ -1008,7 +1027,7 @@ def _webui_config_dict(config: Config) -> dict[str, Any]:
 def _webui_channel_enabled(config: Config) -> bool:
     from nanobot.channels.websocket.runtime import WebSocketConfig
 
-    current = getattr(config.channels, "websocket", None) or {}
+    current: Any = getattr(config.channels, "websocket", None) or {}
     return bool(WebSocketConfig.model_validate(current).enabled)
 
 
@@ -1167,7 +1186,7 @@ def _ensure_local_webui_channel(config: Config, *, port: int | None, yes: bool)
     """Enable the local WebUI channel with safe localhost defaults."""
     from nanobot.channels.websocket.runtime import WebSocketConfig
 
-    current = getattr(config.channels, "websocket", None) or {}
+    current: Any = getattr(config.channels, "websocket", None) or {}
     model = WebSocketConfig.model_validate(current)
     changed = False
     generated_secret = False
@@ -1329,7 +1348,7 @@ def _print_webui_foreground_lifecycle(*, attached: bool) -> None:
     console.print("[dim]Press Ctrl+C here to stop nanobot.[/dim]")
 
 
-def _attach_to_background_gateway(runtime: Any) -> None:
+def _attach_to_background_gateway(runtime: "GatewayRuntime") -> None:
     """Keep a foreground WebUI command attached to a managed gateway."""
     _print_webui_foreground_lifecycle(attached=True)
     try:
@@ -1512,16 +1531,19 @@ def serve(
         api_key=api_key,
     )
 
-    async def on_startup(_app):
+    async def on_startup(_app: Any) -> None:
         await agent_loop._connect_mcp()
 
-    async def on_cleanup(_app):
+    async def on_cleanup(_app: Any) -> None:
         await agent_loop.close_mcp()
 
     api_app.on_startup.append(on_startup)
     api_app.on_cleanup.append(on_cleanup)
 
-    web.run_app(api_app, host=host, port=port, print=lambda msg: logger.info(msg))
+    def _log_aiohttp(message: object) -> None:
+        logger.info("{}", message)
+
+    web.run_app(api_app, host=host, port=port, print=_log_aiohttp)
 
 
 # ============================================================================
@@ -1778,6 +1800,7 @@ def _run_gateway(
     from nanobot.cron.session_turns import is_bound_cron_job
     from nanobot.cron.types import CronJob
     from nanobot.providers.factory import (
+        ProviderSnapshot,
         build_provider_snapshot,
         build_unconfigured_provider_snapshot,
         load_provider_snapshot,
@@ -1823,12 +1846,15 @@ def _run_gateway(
     runtime_events = RuntimeEventBus()
     fallback_model_observer = build_webui_fallback_model_observer(bus)
 
-    def _observe_fallback_models(snapshot):
+    def _observe_fallback_models(snapshot: ProviderSnapshot) -> ProviderSnapshot:
         if isinstance(snapshot.provider, FallbackProvider):
             snapshot.provider.set_fallback_model_observer(fallback_model_observer)
         return snapshot
 
-    def _load_gateway_provider_snapshot(*args: Any, **kwargs: Any):
+    def _load_gateway_provider_snapshot(
+        *args: Any,
+        **kwargs: Any,
+    ) -> ProviderSnapshot:
         try:
             return _observe_fallback_models(load_provider_snapshot(*args, **kwargs))
         except ValueError as exc:
@@ -1896,10 +1922,13 @@ def _run_gateway(
         local_trigger_store=trigger_store,
         hook_factories=[create_file_edit_activity_hook],
     )
+    def _schedule_webui_background(awaitable: Awaitable[None]) -> None:
+        agent._schedule_background(cast(Coroutine[Any, Any, None], awaitable))
+
     webui_turn_coordinator = WebuiTurnCoordinator(
         bus=bus,
         sessions=session_manager,
-        schedule_background=lambda coro: agent._schedule_background(coro),
+        schedule_background=_schedule_webui_background,
     )
     webui_turn_coordinator.subscribe(runtime_events)
     from nanobot.bus.events import OutboundMessage
@@ -1944,14 +1973,14 @@ def _run_gateway(
             session_manager.save(session)
         await bus.publish_outbound(msg)
 
-    message_tool = getattr(agent, "tools", {}).get("message")
+    message_tool = agent.tools.get("message")
     if isinstance(message_tool, MessageTool):
         message_tool.set_send_callback(_deliver_to_channel)
 
     # Set cron callback (needs agent)
     async def on_cron_job(job: CronJob) -> str | None:
         """Execute a cron job through the agent."""
-        async def _silent(*_args, **_kwargs):
+        async def _silent(*_args: Any, **_kwargs: Any) -> None:
             pass
 
         # Dream is an internal job — run directly, not through the agent loop.
@@ -1972,10 +2001,7 @@ def _run_gateway(
                     return None
                 prompt, last_cursor = result
                 key = dream_session_key()
-                resolve_dream_runtime = getattr(agent, "dream_runtime", None)
-                dream_runtime = (
-                    resolve_dream_runtime() if callable(resolve_dream_runtime) else None
-                )
+                dream_runtime = agent.dream_runtime()
                 resp = await agent.process_direct(
                     prompt,
                     session_key=key,
@@ -2111,11 +2137,7 @@ def _run_gateway(
     cron.on_job = on_cron_job
 
     def _webui_runtime_model_name() -> str | None:
-        model = getattr(agent, "model", None)
-        if isinstance(model, str):
-            stripped = model.strip()
-            return stripped or None
-        return None
+        return agent.model.strip() or None
 
     # Create channel manager (forwards SessionManager so the WebSocket channel
     # can serve the embedded webui's REST surface).
@@ -2126,12 +2148,8 @@ def _run_gateway(
         cron_service=cron,
         local_trigger_store=trigger_store,
         webui_runtime_model_name=_webui_runtime_model_name,
-        webui_cron_pending_job_ids=getattr(agent, "pending_cron_job_ids_for_session", None),
-        webui_local_trigger_pending_ids=getattr(
-            agent,
-            "pending_local_trigger_ids_for_session",
-            None,
-        ),
+        webui_cron_pending_job_ids=agent.pending_cron_job_ids_for_session,
+        webui_local_trigger_pending_ids=agent.pending_local_trigger_ids_for_session,
         webui_static_dist=webui_static_dist,
         webui_runtime_surface=webui_runtime_surface,
         webui_runtime_capabilities=webui_runtime_capabilities,
@@ -2158,8 +2176,9 @@ def _run_gateway(
         console.print("[yellow]Warning: No channels enabled[/yellow]")
 
     cron_status = cron.status()
-    if cron_status["jobs"] > 0:
-        console.print(f"[green]✓[/green] Cron: {cron_status['jobs']} scheduled jobs")
+    cron_job_count = cast(int, cron_status["jobs"])
+    if cron_job_count > 0:
+        console.print(f"[green]✓[/green] Cron: {cron_job_count} scheduled jobs")
 
     hb_cfg = config.gateway.heartbeat
     if hb_cfg.enabled:
@@ -2167,13 +2186,16 @@ def _run_gateway(
     else:
         console.print("[yellow]✗[/yellow] Heartbeat: disabled")
 
-    async def _health_server(host: str, health_port: int):
+    async def _health_server(host: str, health_port: int) -> None:
         """Lightweight HTTP health endpoint on the gateway port."""
         import json as _json
 
         connection_slots = asyncio.Semaphore(_GATEWAY_HEALTH_MAX_CONNECTIONS)
 
-        async def handle(reader, writer):
+        async def handle(
+            reader: asyncio.StreamReader,
+            writer: asyncio.StreamWriter,
+        ) -> None:
             if connection_slots.locked():
                 writer.close()
                 return
@@ -2260,7 +2282,7 @@ def _run_gateway(
         # Channels start asynchronously; a short poll lets us avoid racing the bind.
         for _ in range(40):  # ~4s max
             try:
-                reader, writer = await asyncio.open_connection(
+                _reader, writer = await asyncio.open_connection(
                     target_host,
                     target_port,
                 )
@@ -2276,10 +2298,10 @@ def _run_gateway(
         except Exception as e:
             console.print(f"[yellow]Could not open browser ({e}); visit {open_browser_url}[/yellow]")
 
-    async def run():
-        tasks: list[asyncio.Task] = []
-        shutdown_task: asyncio.Task | None = None
-        runtime_tasks: asyncio.Future | None = None
+    async def run() -> None:
+        tasks: list[asyncio.Task[Any]] = []
+        shutdown_task: asyncio.Task[Any] | None = None
+        runtime_tasks: asyncio.Future[list[Any]] | None = None
         runtime_tasks_drained = False
         shutdown_event = asyncio.Event()
         _ensure_interactive_tty_mode()
@@ -2306,7 +2328,7 @@ def _run_gateway(
                 asyncio.create_task(
                     run_local_trigger_queue(
                         store=trigger_store,
-                        submit_turn=getattr(agent, "submit_local_trigger_turn", None),
+                        submit_turn=agent.submit_local_trigger_turn,
                         is_channel_enabled=lambda name: channels.get_channel(name) is not None,
                     ),
                     name="nanobot-local-triggers",
@@ -2334,7 +2356,7 @@ def _run_gateway(
             if runtime_tasks in done:
                 runtime_tasks_drained = True
                 await runtime_tasks
-            elif runtime_tasks is not None:
+            else:
                 runtime_tasks.cancel()
         except KeyboardInterrupt:
             console.print("\nShutting down...")
@@ -2410,33 +2432,33 @@ def agent(
     from nanobot.providers.factory import make_provider
     from nanobot.providers.image_generation import image_gen_provider_configs
 
-    config = _load_runtime_config(config, workspace)
+    runtime_config = _load_runtime_config(config, workspace)
     try:
-        provider = make_provider(config)
+        provider = make_provider(runtime_config)
     except ValueError as exc:
         _print_agent_start_error(exc)
         raise typer.Exit(1) from exc
 
-    sync_workspace_templates(config.workspace_path)
+    sync_workspace_templates(runtime_config.workspace_path)
 
     bus = MessageBus()
 
     # Preserve existing single-workspace installs, but keep custom workspaces clean.
-    if is_default_workspace(config.workspace_path):
-        _migrate_cron_store(config)
+    if is_default_workspace(runtime_config.workspace_path):
+        _migrate_cron_store(runtime_config)
 
     # Create cron service with workspace-scoped store
-    cron_store_path = config.workspace_path / "cron" / "jobs.json"
+    cron_store_path = runtime_config.workspace_path / "cron" / "jobs.json"
     cron = CronService(cron_store_path)
 
     _set_nanobot_logs(logs)
 
     try:
         agent_loop = AgentLoop.from_config(
-            config, bus,
+            runtime_config, bus,
             provider=provider,
             cron_service=cron,
-            image_generation_provider_configs=image_gen_provider_configs(config),
+            image_generation_provider_configs=image_gen_provider_configs(runtime_config),
             hook_factories=[create_file_edit_activity_hook],
         )
     except ValueError as exc:
@@ -2452,7 +2474,9 @@ def agent(
     # Shared reference for progress callbacks
     _thinking: ThinkingSpinner | None = None
 
-    def _make_progress(renderer: StreamRenderer | None = None):
+    def _make_progress(
+        renderer: StreamRenderer | None = None,
+    ) -> Callable[..., Awaitable[None]]:
         reasoning_buffer = _ReasoningBuffer()
 
         async def _cli_progress(content: str, *, tool_hint: bool = False, reasoning: bool = False, **_kwargs: Any) -> None:
@@ -2482,11 +2506,11 @@ def agent(
 
     if message:
         # Single message mode — direct call, no bus needed
-        async def run_once():
+        async def run_once() -> None:
             renderer = StreamRenderer(
                 render_markdown=markdown,
-                bot_name=config.agents.defaults.bot_name,
-                bot_icon=config.agents.defaults.bot_icon,
+                bot_name=runtime_config.agents.defaults.bot_name,
+                bot_icon=runtime_config.agents.defaults.bot_icon,
             )
             response = await agent_loop.process_direct(
                 message, session_id,
@@ -2512,8 +2536,8 @@ def agent(
         # Interactive mode — route through bus like other channels
         from nanobot.bus.events import InboundMessage
         _init_prompt_session()
-        _model, _preset_tag = _model_display(config)
-        _icon = config.agents.defaults.bot_icon or __logo__
+        _model, _preset_tag = _model_display(runtime_config)
+        _icon = runtime_config.agents.defaults.bot_icon or __logo__
         console.print(f"{_icon} Interactive mode [bold blue]({_model})[/bold blue]{_preset_tag} — type [bold]exit[/bold] or [bold]Ctrl+C[/bold] to quit\n")
 
         if ":" in session_id:
@@ -2521,7 +2545,7 @@ def agent(
         else:
             cli_channel, cli_chat_id = "cli", session_id
 
-        def _handle_signal(signum, frame):
+        def _handle_signal(signum: int, _frame: FrameType | None) -> None:
             sig_name = signal.Signals(signum).name
             _restore_terminal()
             console.print(f"\nReceived {sig_name}, goodbye!")
@@ -2537,7 +2561,7 @@ def agent(
         if hasattr(signal, 'SIGPIPE'):
             signal.signal(signal.SIGPIPE, signal.SIG_IGN)
 
-        async def run_interactive():
+        async def run_interactive() -> None:
             bus_task = asyncio.create_task(agent_loop.run())
             turn_done = asyncio.Event()
             turn_done.set()
@@ -2545,7 +2569,7 @@ def agent(
             renderer: StreamRenderer | None = None
             reasoning_buffer = _ReasoningBuffer()
 
-            async def _consume_outbound():
+            async def _consume_outbound() -> None:
                 while True:
                     try:
                         msg = await asyncio.wait_for(bus.consume_outbound(), timeout=1.0)
@@ -2578,7 +2602,7 @@ def agent(
 
                         if await _maybe_print_interactive_progress(
                             msg,
-                            renderer,
+                            None,
                             agent_loop.channels_config,
                             renderer,
                             reasoning_buffer,
@@ -2625,8 +2649,8 @@ def agent(
                         reasoning_buffer.clear()
                         renderer = StreamRenderer(
                             render_markdown=markdown,
-                            bot_name=config.agents.defaults.bot_name,
-                            bot_icon=config.agents.defaults.bot_icon,
+                            bot_name=runtime_config.agents.defaults.bot_name,
+                            bot_icon=runtime_config.agents.defaults.bot_icon,
                         )
 
                         await bus.publish_inbound(InboundMessage(
@@ -2701,7 +2725,7 @@ def channels_status(
         if section is None:
             enabled = False
         elif isinstance(section, dict):
-            enabled = section.get("enabled", False)
+            enabled = cast(dict[str, Any], section).get("enabled", False)
         else:
             enabled = getattr(section, "enabled", False)
         table.add_row(
@@ -2719,10 +2743,11 @@ def channels_login(
     config: str | None = typer.Option(None, "--config", "-c", help="Path to config file"),
 ):
     """Authenticate with a channel via QR code or other interactive login."""
+    from nanobot.bus.queue import MessageBus
     from nanobot.channels.registry import discover_all
 
     _, loaded = _load_inspection_config(config=config)
-    channel_cfg = getattr(loaded.channels, channel_name, None) or {}
+    channel_cfg: Any = getattr(loaded.channels, channel_name, None) or {}
 
     # Validate channel exists
     all_channels = discover_all()
@@ -2733,8 +2758,8 @@ def channels_login(
 
     console.print(f"{__logo__} {all_channels[channel_name].display_name} Login\n")
 
-    channel_cls = all_channels[channel_name]
-    channel = channel_cls(channel_cfg, bus=None)
+    channel_factory = all_channels[channel_name]
+    channel = channel_factory(channel_cfg, bus=MessageBus())
 
     success = asyncio.run(channel.login(force=force))
 
@@ -2923,24 +2948,28 @@ _OAUTH_PROVIDER_DEFAULT_MODELS: dict[str, str] = {
 }
 
 
-def _register_login(name: str):
+def _register_login(
+    name: str,
+) -> Callable[[Callable[[], None]], Callable[[], None]]:
     """Register an OAuth login handler."""
-    def decorator(fn):
+    def decorator(fn: Callable[[], None]) -> Callable[[], None]:
         _LOGIN_HANDLERS[name] = fn
         return fn
 
     return decorator
 
 
-def _register_logout(name: str):
+def _register_logout(
+    name: str,
+) -> Callable[[Callable[[], None]], Callable[[], None]]:
     """Register an OAuth logout handler."""
-    def decorator(fn):
+    def decorator(fn: Callable[[], None]) -> Callable[[], None]:
         _LOGOUT_HANDLERS[name] = fn
         return fn
     return decorator
 
 
-def _resolve_oauth_provider(provider: str):
+def _resolve_oauth_provider(provider: str) -> "ProviderSpec":
     """Resolve and validate an OAuth provider configuration."""
     from nanobot.providers.registry import PROVIDERS
 

nanobot/cli/gateway.py

@@ -1,5 +1,7 @@
 """Typer commands for foreground and background gateway control."""
 
+# pyright: reportUnusedFunction=false
+
 from __future__ import annotations
 
 import subprocess

nanobot/cli/onboard.py

@@ -1,19 +1,27 @@
 """Interactive onboarding questionnaire for nanobot."""
 
+# pyright: reportMissingTypeStubs=false, reportUnusedFunction=false
+
 import asyncio
 import json
 import types
+from collections.abc import Callable, Iterable, Sized
 from contextlib import suppress
 from dataclasses import dataclass
 from functools import lru_cache
-from typing import Any, Literal, NamedTuple, get_args, get_origin
+from typing import Any, Literal, NamedTuple, TypeVar, cast, get_args, get_origin
 
 try:
     import questionary
 except ModuleNotFoundError:  # pragma: no cover - exercised in environments without wizard deps
     questionary = None
 from loguru import logger
+from prompt_toolkit.completion import CompleteEvent, Completer, Completion
+from prompt_toolkit.document import Document
+from prompt_toolkit.key_binding import KeyBindings
+from prompt_toolkit.key_binding.key_processor import KeyPressEvent
 from pydantic import BaseModel
+from pydantic.fields import FieldInfo
 from rich.console import Console
 from rich.markup import escape
 from rich.panel import Panel
@@ -29,6 +37,8 @@ from nanobot.config.schema import Config, ModelPresetConfig
 
 console = Console()
 
+_ModelT = TypeVar("_ModelT", bound=BaseModel)
+
 
 @dataclass
 class OnboardResult:
@@ -119,14 +129,14 @@ _CHANNEL_LOGIN_CHOICE = "Login with QR/link"
 _CHANNEL_ADVANCED_CHOICE = "Edit advanced settings"
 
 
-def _get_questionary():
+def _get_questionary() -> Any:
     """Return questionary or raise a clear error when wizard deps are unavailable."""
     if questionary is None:
         raise RuntimeError(
             "Interactive onboarding requires the optional 'questionary' dependency. "
             "Install project dependencies and rerun with --wizard."
         )
-    return questionary
+    return cast(Any, questionary)
 
 
 def _select_with_back(
@@ -147,7 +157,6 @@ def _select_with_back(
     import shutil
 
     from prompt_toolkit.application import Application
-    from prompt_toolkit.key_binding import KeyBindings
     from prompt_toolkit.keys import Keys
     from prompt_toolkit.layout import Layout
     from prompt_toolkit.layout.containers import HSplit, Window
@@ -170,8 +179,8 @@ def _select_with_back(
     visible_count = min(len(choices), max(1, terminal_lines - 3))
 
     # Build menu items (uses closure over selected_index)
-    def get_menu_text():
-        items = []
+    def get_menu_text() -> list[tuple[str, str]]:
+        items: list[tuple[str, str]] = []
         start, end = _choice_viewport(selected_index, len(choices), visible_count)
         for i in range(start, end):
             choice = choices[i]
@@ -182,14 +191,14 @@ def _select_with_back(
         return items
 
     # Create layout
-    menu_control = FormattedTextControl(get_menu_text, show_cursor=False)
+    menu_control = FormattedTextControl(cast(Any, get_menu_text), show_cursor=False)
     menu_window = Window(content=menu_control, height=visible_count, always_hide_cursor=True)
 
-    def get_prompt_text():
+    def get_prompt_text() -> list[tuple[str, str]]:
         suffix = f" ({selected_index + 1}/{len(choices)})" if len(choices) > visible_count else ""
         return [("class:question", f"{prompt}{suffix}")]
 
-    prompt_control = FormattedTextControl(get_prompt_text, show_cursor=False)
+    prompt_control = FormattedTextControl(cast(Any, get_prompt_text), show_cursor=False)
     prompt_window = Window(content=prompt_control, height=1, always_hide_cursor=True)
 
     layout = Layout(HSplit([prompt_window, menu_window]))
@@ -198,34 +207,34 @@ def _select_with_back(
     bindings = KeyBindings()
 
     @bindings.add(Keys.Up)
-    def _up(event):
+    def _up(event: KeyPressEvent) -> None:
         nonlocal selected_index
         selected_index = (selected_index - 1) % len(choices)
         event.app.invalidate()
 
     @bindings.add(Keys.Down)
-    def _down(event):
+    def _down(event: KeyPressEvent) -> None:
         nonlocal selected_index
         selected_index = (selected_index + 1) % len(choices)
         event.app.invalidate()
 
     @bindings.add(Keys.Enter)
-    def _enter(event):
+    def _enter(event: KeyPressEvent) -> None:
         state["result"] = choices[selected_index]
         event.app.exit()
 
     @bindings.add("escape")
-    def _escape(event):
+    def _escape(event: KeyPressEvent) -> None:
         state["result"] = _BACK_PRESSED
         event.app.exit()
 
     @bindings.add(Keys.Left)
-    def _left(event):
+    def _left(event: KeyPressEvent) -> None:
         state["result"] = _BACK_PRESSED
         event.app.exit()
 
     @bindings.add(Keys.ControlC)
-    def _ctrl_c(event):
+    def _ctrl_c(event: KeyPressEvent) -> None:
         state["result"] = None
         event.app.exit()
 
@@ -235,7 +244,7 @@ def _select_with_back(
         "question": f"fg:{_UI_TEXT}",
     })
 
-    app = Application(layout=layout, key_bindings=bindings, style=style)
+    app = Application[object](layout=layout, key_bindings=bindings, style=style)
     app.ttimeoutlen = 0.05
     app.timeoutlen = 0.05
     try:
@@ -268,7 +277,7 @@ class FieldTypeInfo(NamedTuple):
     inner_type: Any
 
 
-def _get_field_type_info(field_info) -> FieldTypeInfo:
+def _get_field_type_info(field_info: FieldInfo) -> FieldTypeInfo:
     """Extract field type info from Pydantic field."""
     annotation = field_info.annotation
     if annotation is None:
@@ -285,10 +294,11 @@ def _get_field_type_info(field_info) -> FieldTypeInfo:
             args = get_args(annotation)
 
     _simple_types: dict[type, str] = {bool: "bool", int: "int", float: "float"}
+    origin_name = getattr(origin, "__name__", None)
 
-    if origin is list or (hasattr(origin, "__name__") and origin.__name__ == "List"):
+    if origin is list or origin_name == "List":
         return FieldTypeInfo("list", args[0] if args else str)
-    if origin is dict or (hasattr(origin, "__name__") and origin.__name__ == "Dict"):
+    if origin is dict or origin_name == "Dict":
         return FieldTypeInfo("dict", None)
     for py_type, name in _simple_types.items():
         if annotation is py_type:
@@ -300,7 +310,7 @@ def _get_field_type_info(field_info) -> FieldTypeInfo:
     return FieldTypeInfo("str", None)
 
 
-def _get_field_display_name(field_key: str, field_info) -> str:
+def _get_field_display_name(field_key: str, field_info: FieldInfo | None) -> str:
     """Get display name for a field."""
     if field_info and field_info.description:
         return field_info.description
@@ -349,22 +359,30 @@ def _format_value(value: Any, rich: bool = True, field_name: str = "") -> str:
         masked = _mask_value(value)
         return f"[dim]{masked}[/dim]" if rich else masked
     if isinstance(value, BaseModel):
-        parts = []
+        model_parts: list[str] = []
         for fname, _finfo in type(value).model_fields.items():
             fval = getattr(value, fname, None)
             formatted = _format_value(fval, rich=False, field_name=fname)
             if formatted != "[not set]":
-                parts.append(f"{fname}={formatted}")
-        return ", ".join(parts) if parts else ("[dim]not set[/dim]" if rich else "[not set]")
+                model_parts.append(f"{fname}={formatted}")
+        return (
+            ", ".join(model_parts)
+            if model_parts
+            else ("[dim]not set[/dim]" if rich else "[not set]")
+        )
     if isinstance(value, list):
-        return ", ".join(str(v) for v in value)
+        return ", ".join(str(v) for v in cast(list[Any], value))
     if isinstance(value, dict):
         # Handle dicts containing BaseModel instances
-        parts = []
-        for k, v in value.items():
+        mapping_parts: list[str] = []
+        for k, v in cast(dict[Any, Any], value).items():
             formatted = _format_value(v, rich=False, field_name=str(k))
-            parts.append(f"{k}: {formatted}")
-        return ", ".join(parts) if parts else ("[dim]not set[/dim]" if rich else "[not set]")
+            mapping_parts.append(f"{k}: {formatted}")
+        return (
+            ", ".join(mapping_parts)
+            if mapping_parts
+            else ("[dim]not set[/dim]" if rich else "[not set]")
+        )
     return str(value)
 
 
@@ -373,13 +391,13 @@ def _format_value_for_input(value: Any, field_type: str) -> str:
     if value is None or value == "":
         return ""
     if field_type == "list" and isinstance(value, list):
-        return ",".join(str(v) for v in value)
+        return ",".join(str(v) for v in cast(list[Any], value))
     if field_type == "dict" and isinstance(value, dict):
         return json.dumps(value)
     return str(value)
 
 
-def _validate_field_constraint(value: Any, field_info) -> str | None:
+def _validate_field_constraint(value: Any, field_info: FieldInfo | None) -> str | None:
     """Validate a value against Pydantic Field constraints.
 
     Returns an error message string if validation fails, None if valid.
@@ -388,7 +406,8 @@ def _validate_field_constraint(value: Any, field_info) -> str | None:
     if field_info is None or not hasattr(field_info, "metadata"):
         return None
 
-    for m in field_info.metadata:
+    for metadata in field_info.metadata:
+        m = metadata
         if hasattr(m, "ge") and isinstance(value, (int, float)):
             if value < m.ge:
                 return f"Value must be >= {m.ge}"
@@ -402,16 +421,16 @@ def _validate_field_constraint(value: Any, field_info) -> str | None:
             if value >= m.lt:
                 return f"Value must be < {m.lt}"
         if hasattr(m, "min_length") and hasattr(value, "__len__"):
-            if len(value) < m.min_length:
+            if len(cast(Sized, value)) < m.min_length:
                 return f"Length must be >= {m.min_length}"
         if hasattr(m, "max_length") and hasattr(value, "__len__"):
-            if len(value) > m.max_length:
+            if len(cast(Sized, value)) > m.max_length:
                 return f"Length must be <= {m.max_length}"
 
     return None
 
 
-def _get_constraint_hint(field_info) -> str:
+def _get_constraint_hint(field_info: FieldInfo | None) -> str:
     """Derive a human-readable constraint hint from field metadata.
 
     Returns a string like " - 0-10" or " - >= 0" to append to field display names.
@@ -421,7 +440,8 @@ def _get_constraint_hint(field_info) -> str:
 
     ge_val = None
     le_val = None
-    for m in field_info.metadata:
+    for metadata in field_info.metadata:
+        m = metadata
         if hasattr(m, "ge"):
             ge_val = m.ge
         if hasattr(m, "le"):
@@ -439,7 +459,11 @@ def _get_constraint_hint(field_info) -> str:
 # --- Rich UI Components ---
 
 
-def _show_config_panel(display_name: str, model: BaseModel, fields: list) -> None:
+def _show_config_panel(
+    display_name: str,
+    model: BaseModel,
+    fields: list[tuple[str, FieldInfo]],
+) -> None:
     """Display current configuration as a rich table."""
     table = Table(show_header=False, box=None, padding=(0, 2))
     table.add_column("Field", style=_UI_ACCENT)
@@ -504,20 +528,18 @@ def _input_bool(display_name: str, current: bool | None) -> bool | None:
     ).ask()
 
 
-def _input_back_key_bindings():
+def _input_back_key_bindings() -> KeyBindings:
     """Return key bindings that make Escape behave like a local back action."""
-    from prompt_toolkit.key_binding import KeyBindings
-
     bindings = KeyBindings()
 
     @bindings.add("escape")
-    def _escape(event):
+    def _escape(event: KeyPressEvent) -> None:
         event.app.exit(result=_BACK_PRESSED)
 
     return bindings
 
 
-def _ask_prompt(prompt):
+def _ask_prompt(prompt: Any) -> Any:
     """Ask a questionary prompt with responsive Escape handling."""
     app = getattr(prompt, "application", None)
     if app is not None:
@@ -528,7 +550,12 @@ def _ask_prompt(prompt):
     return prompt.ask()
 
 
-def _input_text(display_name: str, current: Any, field_type: str, field_info=None) -> Any:
+def _input_text(
+    display_name: str,
+    current: Any,
+    field_type: str,
+    field_info: FieldInfo | None = None,
+) -> Any:
     """Get text input and parse based on field type."""
     default = _format_value_for_input(current, field_type)
 
@@ -591,7 +618,10 @@ def _input_secret(display_name: str) -> str | None | object:
 
 
 def _input_with_existing(
-    display_name: str, current: Any, field_type: str, field_info=None
+    display_name: str,
+    current: Any,
+    field_type: str,
+    field_info: FieldInfo | None = None,
 ) -> Any:
     """Handle input with 'keep existing' option for non-empty values."""
     has_existing = current is not None and current != "" and current != {} and current != []
@@ -624,8 +654,6 @@ def _input_model_with_autocomplete(
     """Get model input with autocomplete suggestions.
 
     """
-    from prompt_toolkit.completion import Completer, Completion
-
     default = str(current) if current else ""
 
     class DynamicModelCompleter(Completer):
@@ -634,7 +662,12 @@ def _input_model_with_autocomplete(
         def __init__(self, provider_name: str):
             self.provider = provider_name
 
-        def get_completions(self, document, _complete_event):
+        def get_completions(
+            self,
+            document: Document,
+            complete_event: CompleteEvent,
+        ) -> Iterable[Completion]:
+            _ = complete_event
             text = document.text_before_cursor
             suggestions = get_model_suggestions(text, provider=self.provider, limit=50)
             for model in suggestions:
@@ -735,7 +768,7 @@ def _handle_model_field(
         return
     if new_value is not None and new_value != current_value:
         setattr(working_model, field_name, new_value)
-        _try_auto_fill_context_window(working_model, new_value)
+        _try_auto_fill_context_window(working_model, cast(str, new_value))
 
 
 def _handle_context_window_field(
@@ -794,7 +827,11 @@ def _handle_fallback_models_field(
     """Handle the 'fallback_models' field with preset-aware list management."""
     from nanobot.config.schema import InlineFallbackConfig
 
-    items: list[Any] = list(current_value) if isinstance(current_value, list) else []
+    items: list[Any] = (
+        list(cast(list[Any], current_value))
+        if isinstance(current_value, list)
+        else []
+    )
     preset_names = sorted(_MODEL_PRESET_CACHE)
 
     while True:
@@ -888,11 +925,11 @@ def _is_str_or_none(annotation: Any) -> bool:
 
 
 def _configure_pydantic_model(
-    model: BaseModel,
+    model: _ModelT,
     display_name: str,
     *,
     skip_fields: set[str] | None = None,
-) -> BaseModel | None:
+) -> _ModelT | None:
     """Configure a Pydantic model interactively.
 
     Returns the updated model when the user selects "Done" or navigates back.
@@ -901,7 +938,7 @@ def _configure_pydantic_model(
     skip_fields = skip_fields or set()
     working_model = model.model_copy(deep=True)
 
-    fields = [
+    fields: list[tuple[str, FieldInfo]] = [
         (name, info)
         for name, info in type(working_model).model_fields.items()
         if name not in skip_fields
@@ -911,7 +948,7 @@ def _configure_pydantic_model(
         return working_model
 
     def get_choices() -> list[str]:
-        items = []
+        items: list[str] = []
         for fname, finfo in fields:
             value = getattr(working_model, fname, None)
             display = _get_field_display_name(fname, finfo)
@@ -1057,6 +1094,10 @@ def _sync_preset_cache(config: Config) -> None:
     _MODEL_PRESET_CACHE.update(config.model_presets.keys())
 
 
+def _validate_nonempty_name(text: str) -> bool | str:
+    return True if text and text.strip() else "Name cannot be empty"
+
+
 def _configure_model_presets(config: Config) -> None:
     """Configure model presets (CRUD)."""
     _sync_preset_cache(config)
@@ -1099,7 +1140,7 @@ def _configure_model_presets(config: Config) -> None:
             if answer == "[+] Add new preset":
                 name_input = _get_questionary().text(
                     "Preset name:",
-                    validate=lambda t: True if t and t.strip() else "Name cannot be empty",
+                    validate=_validate_nonempty_name,
                 ).ask()
                 if not name_input:
                     continue
@@ -1218,7 +1259,7 @@ def _configure_providers(config: Config) -> None:
 
     def get_provider_choices() -> list[str]:
         """Build provider choices with config status indicators."""
-        choices = []
+        choices: list[str] = []
         for name, display in _get_provider_names().items():
             provider = getattr(config.providers, name, None)
             if provider and provider.api_key:
@@ -1427,7 +1468,7 @@ _SETTINGS_SECTIONS: dict[str, tuple[str, str, set[str] | None]] = {
     "Tools": ("Tools Settings", "Configure web search, shell exec, and other tools", {"mcp_servers"}),
 }
 
-_SETTINGS_GETTER = {
+_SETTINGS_GETTER: dict[str, Callable[[Config], BaseModel]] = {
     "Agent Settings": lambda c: c.agents.defaults,
     "Channel Common": lambda c: c.channels,
     "API Server": lambda c: c.api,
@@ -1435,7 +1476,7 @@ _SETTINGS_GETTER = {
     "Tools": lambda c: c.tools,
 }
 
-_SETTINGS_SETTER = {
+_SETTINGS_SETTER: dict[str, Callable[[Config, BaseModel], None]] = {
     "Agent Settings": lambda c, v: setattr(c.agents, "defaults", v),
     "Channel Common": lambda c, v: setattr(c, "channels", v),
     "API Server": lambda c, v: setattr(c, "api", v),
@@ -1449,7 +1490,7 @@ def _configure_general_settings(config: Config, section: str) -> None:
     meta = _SETTINGS_SECTIONS.get(section)
     if not meta:
         return
-    display_name, subtitle, skip = meta
+    display_name, _subtitle, skip = meta
     model = _SETTINGS_GETTER[section](config)
     updated = _configure_pydantic_model(model, display_name, skip_fields=skip)
     if updated is not None:
@@ -1495,7 +1536,7 @@ def _show_summary(config: Config) -> None:
     console.print()
 
     # Providers
-    provider_rows = []
+    provider_rows: list[tuple[str, str]] = []
     for name, display in _get_provider_names().items():
         provider = getattr(config.providers, name, None)
         status = (
@@ -1507,12 +1548,12 @@ def _show_summary(config: Config) -> None:
     _print_summary_panel(provider_rows, "LLM Providers")
 
     # Channels
-    channel_rows = []
+    channel_rows: list[tuple[str, str]] = []
     for name, display in _get_channel_names().items():
         channel = getattr(config.channels, name, None)
         if channel:
             enabled = (
-                channel.get("enabled", False)
+                cast(dict[str, Any], channel).get("enabled", False)
                 if isinstance(channel, dict)
                 else getattr(channel, "enabled", False)
             )
@@ -1523,7 +1564,7 @@ def _show_summary(config: Config) -> None:
     _print_summary_panel(channel_rows, "Chat Channels")
 
     # Model Presets
-    preset_rows = []
+    preset_rows: list[tuple[str, str]] = []
     for name, preset in config.model_presets.items():
         preset_rows.append((name, f"{preset.model} - ctx {preset.context_window_tokens}"))
     _print_summary_panel(preset_rows, "Model Presets")
@@ -1562,7 +1603,7 @@ def _set_primary_quick_start_preset(config: Config, provider_name: str, model: s
 
 def _show_quick_start_progress(active_step: int) -> None:
     """Render a compact step tracker for Quick Start."""
-    parts = []
+    parts: list[str] = []
     for idx, label in enumerate(_QUICK_START_STEPS, 1):
         if idx < active_step:
             parts.append(f"[{_UI_SUCCESS}]{idx}. {label}[/]")
@@ -1755,7 +1796,10 @@ def _configure_quick_start_provider(config: Config) -> bool | object:
                 continue
             if api_base_result is None:
                 return False
-            api_base, base_was_prompted = api_base_result
+            api_base, base_was_prompted = cast(
+                tuple[str, bool],
+                api_base_result,
+            )
 
         api_key: str | None = None
         if _quick_start_requires_api_key(provider_name, provider_info):
@@ -1778,7 +1822,10 @@ def _configure_quick_start_provider(config: Config) -> bool | object:
                 continue
             if api_base_result is None:
                 return False
-            api_base, base_was_prompted = api_base_result
+            api_base, base_was_prompted = cast(
+                tuple[str, bool],
+                api_base_result,
+            )
 
         provider_config = getattr(config.providers, provider_name, None)
         if provider_config is None:
@@ -1792,7 +1839,7 @@ def _configure_quick_start_provider(config: Config) -> bool | object:
         )
         if model is _BACK_PRESSED:
             continue
-        model = (model or "").strip()
+        model = cast(str, model or "").strip()
         if not model:
             console.print("[yellow]! Model ID is required for Quick Start[/yellow]")
             return False
@@ -1850,7 +1897,7 @@ def _enable_quick_start_websocket_defaults(config: Config) -> bool:
         console.print("[red]No configuration class found for websocket[/red]")
         return False
 
-    current = getattr(config.channels, "websocket", None) or {}
+    current: Any = getattr(config.channels, "websocket", None) or {}
     model = config_cls.model_validate(current)
     if hasattr(model, "enabled"):
         setattr(model, "enabled", True)
@@ -1997,7 +2044,7 @@ def _configure_advanced_settings(config: Config) -> None:
         if answer is _BACK_PRESSED or answer is None or answer == "<- Back":
             break
 
-        _advanced_dispatch = {
+        _advanced_dispatch: dict[str, Callable[[], None]] = {
             "[P] LLM Provider": lambda: _configure_providers(config),
             "[M] Model Presets": lambda: _configure_model_presets(config),
             "[C] Chat Channel": lambda: _configure_channels(config),
@@ -2008,9 +2055,9 @@ def _configure_advanced_settings(config: Config) -> None:
             "[T] Tools": lambda: _configure_general_settings(config, "Tools"),
             "[V] View Configuration Summary": lambda: _show_summary(config),
         }
-        action_fn = _advanced_dispatch.get(answer)
+        action_fn = _advanced_dispatch.get(cast(str, answer))
         if action_fn:
-            last_choice = answer
+            last_choice = cast(str, answer)
             action_fn()
 
 

nanobot/cli/stream.py

@@ -11,6 +11,7 @@ from __future__ import annotations
 
 import sys
 from contextlib import contextmanager, nullcontext
+from typing import Literal
 
 from rich.console import Console
 from rich.live import Live
@@ -51,12 +52,12 @@ class ThinkingSpinner:
         self._spinner = c.status(f"[dim]{bot_name} is thinking...[/dim]", spinner="dots")
         self._active = False
 
-    def __enter__(self):
+    def __enter__(self) -> ThinkingSpinner:
         self._spinner.start()
         self._active = True
         return self
 
-    def __exit__(self, *exc):
+    def __exit__(self, *exc: object) -> Literal[False]:
         self._active = False
         self._spinner.stop()
         _clear_current_line(self._console)
@@ -110,7 +111,7 @@ class StreamRenderer:
         self._header_printed = False
         self._start_spinner()
 
-    def _renderable(self):
+    def _renderable(self) -> Markdown | Text:
         """Create a renderable from the current buffer."""
         if self._md and self._buf:
             return Markdown(self._buf)

nanobot/command/builtin.py

@@ -9,16 +9,20 @@ import sys
 import time
 from contextlib import suppress
 from dataclasses import dataclass
-from typing import Literal
+from typing import TYPE_CHECKING, Any, Literal, cast
 
 from nanobot import __version__
-from nanobot.agent.goal_permission import goal_mutation_permission
 from nanobot.bus.events import OutboundMessage
 from nanobot.command.router import CommandContext, CommandRouter, normalize_command_text
 from nanobot.utils.helpers import build_status_content
 from nanobot.utils.restart import set_restart_notice_to_env
 from nanobot.utils.workspace_prompts import initialize_workspace_prompt
 
+if TYPE_CHECKING:
+    from nanobot.agent.loop import AgentLoop
+    from nanobot.session.manager import Session
+    from nanobot.utils.gitstore import CommitInfo
+
 # WebUI protocol contract for how a slash command participates in turn state:
 # - side_channel: returns control text without starting or ending an agent turn.
 # - finalize_active_turn: side-channel command that also closes the active UI turn.
@@ -199,9 +203,9 @@ async def cmd_stop(ctx: CommandContext) -> OutboundMessage:
     """Cancel all active tasks and subagents for the session."""
     loop = ctx.loop
     msg = ctx.msg
-    total = await loop._cancel_active_tasks(ctx.key)
+    total = await loop._cancel_active_tasks(ctx.key)  # pyright: ignore[reportPrivateUsage]
     # Also drain pending queue to prevent mid-turn injection deadlock
-    pending = loop._pending_queues.pop(ctx.key, None)
+    pending = loop._pending_queues.pop(ctx.key, None)  # pyright: ignore[reportPrivateUsage]
     if pending is not None:
         while not pending.empty():
             try:
@@ -228,14 +232,14 @@ async def cmd_restart(ctx: CommandContext) -> OutboundMessage:
     async def _do_restart():
         await asyncio.sleep(1)
         argv = [sys.executable, "-m", "nanobot"] + sys.argv[1:]
-        mode = getattr(ctx.loop, "restart_mode", "auto") or "auto"
+        mode = ctx.loop.restart_mode or "auto"
         if mode == "auto":
             mode = "spawn" if sys.platform == "win32" else "exec"
         if mode == "exec":
             os.execv(sys.executable, argv)
             return
         if mode == "spawn":
-            kwargs = {}
+            kwargs: dict[str, Any] = {}
             if sys.platform == "win32":
                 kwargs["creationflags"] = subprocess.CREATE_NEW_PROCESS_GROUP
             subprocess.Popen(argv, **kwargs)
@@ -260,21 +264,20 @@ async def cmd_status(ctx: CommandContext) -> OutboundMessage:
             runtime=runtime,
         )
     if ctx_est <= 0:
-        ctx_est = loop._last_usage.get("prompt_tokens", 0)
+        ctx_est = loop._last_usage.get("prompt_tokens", 0)  # pyright: ignore[reportPrivateUsage]
 
     # Fetch web search provider usage (best-effort, never blocks the response)
     search_usage_text: str | None = None
     # Never let usage fetch break /status
     with suppress(Exception):
         from nanobot.utils.searchusage import fetch_search_usage
-        web_cfg = getattr(loop, "web_config", None)
-        search_cfg = getattr(web_cfg, "search", None) if web_cfg else None
-        if search_cfg is not None:
-            provider = getattr(search_cfg, "provider", "duckduckgo")
-            api_key = getattr(search_cfg, "api_key", "") or None
-            usage = await fetch_search_usage(provider=provider, api_key=api_key)
-            search_usage_text = usage.format()
-    active_tasks = loop._active_tasks.get(ctx.key, [])
+        search_cfg = loop.web_config.search
+        usage = await fetch_search_usage(
+            provider=search_cfg.provider,
+            api_key=search_cfg.api_key or None,
+        )
+        search_usage_text = usage.format()
+    active_tasks = loop._active_tasks.get(ctx.key, [])  # pyright: ignore[reportPrivateUsage]
     task_count = sum(1 for t in active_tasks if not t.done())
     with suppress(Exception):
         task_count += loop.subagents.get_running_count_by_session(ctx.key)
@@ -283,7 +286,7 @@ async def cmd_status(ctx: CommandContext) -> OutboundMessage:
         chat_id=ctx.msg.chat_id,
         content=build_status_content(
             version=__version__, model=runtime.model,
-            start_time=loop._start_time, last_usage=loop._last_usage,
+            start_time=loop._start_time, last_usage=loop._last_usage,  # pyright: ignore[reportPrivateUsage]
             context_window_tokens=runtime.context_window_tokens,
             session_msg_count=len(session.get_history(max_messages=0)),
             context_tokens_estimate=ctx_est,
@@ -298,17 +301,18 @@ async def cmd_status(ctx: CommandContext) -> OutboundMessage:
 async def cmd_new(ctx: CommandContext) -> OutboundMessage:
     """Stop active task and start a fresh session."""
     loop = ctx.loop
-    await loop._cancel_active_tasks(ctx.key)
+    await loop._cancel_active_tasks(ctx.key)  # pyright: ignore[reportPrivateUsage]
     session = ctx.session or loop.sessions.get_or_create(ctx.key)
     snapshot = session.messages[session.last_consolidated:]
+    runtime = None
     if snapshot:
         runtime = ctx.runtime or loop.runtime_for_session(session)
     session.clear()
     loop.sessions.save(session)
     loop.sessions.invalidate(session.key)
-    if snapshot:
-        loop._schedule_background(
-            loop.consolidator.archive(
+    if snapshot and runtime is not None:
+        loop._schedule_background(  # pyright: ignore[reportPrivateUsage]
+            loop.consolidator.archive(  # pyright: ignore[reportUnknownMemberType]
                 snapshot,
                 runtime=runtime,
                 session_key=ctx.key,
@@ -325,7 +329,7 @@ def _format_preset_names(names: list[str]) -> str:
     return ", ".join(f"`{name}`" for name in names) if names else "(none configured)"
 
 
-def _model_preset_names(loop) -> list[str]:
+def _model_preset_names(loop: AgentLoop) -> list[str]:
     names = set(loop.model_presets)
     names.add("default")
     return ["default", *sorted(name for name in names if name != "default")]
@@ -335,7 +339,7 @@ def _command_error_message(exc: Exception) -> str:
     return str(exc.args[0]) if isinstance(exc, KeyError) and exc.args else str(exc)
 
 
-def _model_command_status(loop, session) -> str:
+def _model_command_status(loop: AgentLoop, session: Session) -> str:
     names = _model_preset_names(loop)
     try:
         runtime = loop.runtime_for_session(session, recover_removed=False)
@@ -401,8 +405,7 @@ async def cmd_model(ctx: CommandContext) -> OutboundMessage:
         f"- Model: `{runtime.model}`",
         f"- Context window: {runtime.context_window_tokens}",
     ]
-    if max_tokens is not None:
-        lines.append(f"- Max output tokens: {max_tokens}")
+    lines.append(f"- Max output tokens: {max_tokens}")
     return OutboundMessage(
         channel=ctx.msg.channel,
         chat_id=ctx.msg.chat_id,
@@ -442,8 +445,7 @@ async def cmd_dream(ctx: CommandContext) -> OutboundMessage:
                 return
             prompt, last_cursor = result
             key = dream_session_key()
-            resolve_dream_runtime = getattr(loop, "dream_runtime", None)
-            dream_runtime = resolve_dream_runtime() if callable(resolve_dream_runtime) else None
+            dream_runtime = loop.dream_runtime()
             resp = await loop.process_direct(
                 prompt,
                 session_key=key,
@@ -640,7 +642,12 @@ def _format_changed_files(diff: str) -> str:
 _DREAM_COMMIT_PREFIX = "dream:"
 
 
-def _format_dream_log_content(commit, diff: str, *, requested_sha: str | None = None) -> str:
+def _format_dream_log_content(
+    commit: CommitInfo,
+    diff: str,
+    *,
+    requested_sha: str | None = None,
+) -> str:
     files_line = _format_changed_files(diff)
     lines = [
         "## Dream Update",
@@ -668,7 +675,7 @@ def _format_dream_log_content(commit, diff: str, *, requested_sha: str | None =
     return "\n".join(lines)
 
 
-def _format_dream_restore_list(commits: list) -> str:
+def _format_dream_restore_list(commits: list[CommitInfo]) -> str:
     lines = [
         "## Dream Restore",
         "",
@@ -806,14 +813,20 @@ _HISTORY_MAX_COUNT = 50
 _HISTORY_MAX_CONTENT_CHARS = 200
 
 
-def _format_history_message(msg: dict) -> str | None:
+def _format_history_message(msg: dict[str, Any]) -> str | None:
     """Format a single history message for display. Returns None to skip."""
     role = msg.get("role")
     if role not in ("user", "assistant"):
         return None
     content = msg.get("content") or ""
     if isinstance(content, list):
-        parts = [b.get("text", "") for b in content if isinstance(b, dict) and b.get("type") == "text"]
+        parts = [
+            text
+            for block in cast(list[object], content)
+            if (item := cast(dict[str, Any], block) if isinstance(block, dict) else None)
+            and item.get("type") == "text"
+            and isinstance(text := item.get("text"), str)
+        ]
         content = " ".join(parts)
     content = str(content).strip()
     if not content:
@@ -863,6 +876,8 @@ async def cmd_history(ctx: CommandContext) -> OutboundMessage:
 
 async def cmd_goal(ctx: CommandContext) -> OutboundMessage | None:
     """Mark this turn as an explicit sustained-goal request."""
+    from nanobot.agent.goal_permission import goal_mutation_permission
+
     goal = ctx.args.strip()
     if not goal:
         return OutboundMessage(
@@ -923,7 +938,7 @@ async def cmd_skill(ctx: CommandContext) -> OutboundMessage:
     else:
         lines = [f"Available skills ({len(skills)}):", ""]
         for entry in skills:
-            desc = loop.context.skills._get_skill_description(entry["name"])
+            desc = loop.context.skills.get_skill_description(entry["name"])
             lines.append(f"- **{entry['name']}** — {desc}")
         content = "\n".join(lines)
     return OutboundMessage(
@@ -951,15 +966,9 @@ async def cmd_trigger(ctx: CommandContext) -> OutboundMessage:
     from nanobot.triggers.local_store import LocalTriggerStore
 
     loop = ctx.loop
-    workspace = getattr(loop, "workspace", None)
-    if workspace is None:
-        workspace = getattr(getattr(loop, "context", None), "workspace", None)
-    if workspace is None:
-        raise RuntimeError("workspace unavailable for trigger creation")
-
-    store = getattr(loop, "local_trigger_store", None)
+    store = loop.local_trigger_store
     if store is None:
-        store = LocalTriggerStore(workspace)
+        store = LocalTriggerStore(loop.workspace)
 
     from nanobot.session.keys import UNIFIED_SESSION_KEY
 

nanobot/command/router.py

@@ -8,6 +8,7 @@ from dataclasses import dataclass, field
 from typing import TYPE_CHECKING, Any, Awaitable, Callable
 
 if TYPE_CHECKING:
+    from nanobot.agent.loop import AgentLoop
     from nanobot.bus.events import InboundMessage, OutboundMessage
     from nanobot.session.manager import Session
     from nanobot.utils.llm_runtime import LLMRuntime
@@ -44,7 +45,7 @@ class CommandContext:
     key: str
     raw: str
     args: str = ""
-    loop: Any = None
+    loop: AgentLoop = field(kw_only=True)
     runtime: LLMRuntime | None = None
     is_user_turn: bool = False
     turn_scopes: list[AbstractContextManager[Any]] = field(default_factory=list)

nanobot/config/loader.py

@@ -4,20 +4,28 @@ import json
 import os
 import re
 from pathlib import Path
-from typing import Any
+from typing import Any, cast, overload
 
 from pydantic import BaseModel, ValidationError
 from pydantic_settings import SettingsError
 
 from nanobot.config.errors import ConfigIssue, ConfigLoadError, validation_issues
-from nanobot.config.schema import Config, _resolve_tool_config_refs
-from nanobot.utils.helpers import _write_text_atomic
+from nanobot.config.schema import (
+    Config,
+    _resolve_tool_config_refs,  # pyright: ignore[reportPrivateUsage]
+)
+from nanobot.utils.helpers import _write_text_atomic  # pyright: ignore[reportPrivateUsage]
 
 # Global variable to store current config path (for multi-instance support)
 _current_config_path: Path | None = None
 _schema_refs_ready = False
 
 
+def _as_config_object(value: object) -> dict[str, Any] | None:
+    """Narrow an untrusted JSON configuration value to an object."""
+    return cast(dict[str, Any], value) if isinstance(value, dict) else None
+
+
 def set_config_path(path: Path) -> None:
     """Set the current config path (used to derive data directory)."""
     global _current_config_path
@@ -110,7 +118,7 @@ def load_config(config_path: Path | None = None) -> Config:
             ),
         )
 
-    data = _migrate_config(data)
+    data = _migrate_config(cast(dict[str, Any], data))
     try:
         config = Config.model_validate(data)
     except ValidationError as exc:
@@ -164,13 +172,15 @@ def save_config(config: Config, config_path: Path | None = None) -> None:
     _write_text_atomic(path, json.dumps(data, indent=2, ensure_ascii=False))
 
 
-def merge_missing_defaults(existing: Any, defaults: Any) -> Any:
+def merge_missing_defaults(existing: object, defaults: object) -> object:
     """Recursively add missing defaults without replacing configured values."""
     if not isinstance(existing, dict) or not isinstance(defaults, dict):
-        return existing
+        return cast(object, existing)
 
-    merged = dict(existing)
-    for key, value in defaults.items():
+    existing_dict = cast(dict[str, object], existing)
+    defaults_dict = cast(dict[str, object], defaults)
+    merged = dict(existing_dict)
+    for key, value in defaults_dict.items():
         if key not in merged:
             merged[key] = value
         else:
@@ -203,7 +213,15 @@ def resolve_config_env_vars(
     return _resolve_in_place(config)
 
 
-def resolve_env_refs(value: str) -> str:
+@overload
+def resolve_env_refs(value: str) -> str: ...
+
+
+@overload
+def resolve_env_refs(value: object) -> object: ...
+
+
+def resolve_env_refs(value: object) -> object:
     """Resolve ``${VAR}`` references in a single string, leniently.
 
     Unlike :func:`resolve_config_env_vars` (which walks a whole ``Config`` and
@@ -245,11 +263,21 @@ def _resolve_in_place(obj: Any) -> Any:
             copy.__pydantic_extra__ = new_extras
         return copy
     if isinstance(obj, dict):
-        resolved = {k: _resolve_in_place(v) for k, v in obj.items()}
-        return resolved if any(resolved[k] is not obj[k] for k in obj) else obj
+        object_dict = cast(dict[str, Any], obj)
+        resolved = {key: _resolve_in_place(value) for key, value in object_dict.items()}
+        return (
+            resolved
+            if any(resolved[key] is not object_dict[key] for key in object_dict)
+            else cast(object, obj)
+        )
     if isinstance(obj, list):
-        resolved = [_resolve_in_place(v) for v in obj]
-        return resolved if any(nv is not ov for nv, ov in zip(resolved, obj)) else obj
+        object_list = cast(list[Any], obj)
+        resolved = [_resolve_in_place(value) for value in object_list]
+        return (
+            resolved
+            if any(new is not old for new, old in zip(resolved, object_list))
+            else cast(object, obj)
+        )
     return obj
 
 
@@ -270,20 +298,21 @@ def _missing_env_issues(
         issues: list[ConfigIssue] = []
         for name, field in type(obj).model_fields.items():
             alias = field.serialization_alias or field.alias or name
-            part = alias if isinstance(alias, str) else name
+            part = alias
             issues.extend(_missing_env_issues(getattr(obj, name), (*path, part)))
         for name, value in (obj.__pydantic_extra__ or {}).items():
             issues.extend(_missing_env_issues(value, (*path, name)))
         return issues
     if isinstance(obj, dict):
+        object_dict = cast(dict[str | int, Any], obj)
         issues = []
-        for name, value in obj.items():
-            part = name if isinstance(name, (str, int)) else str(name)
+        for name, value in object_dict.items():
+            part = name
             issues.extend(_missing_env_issues(value, (*path, part)))
         return issues
     if isinstance(obj, list):
         issues = []
-        for index, value in enumerate(obj):
+        for index, value in enumerate(cast(list[Any], obj)):
             issues.extend(_missing_env_issues(value, (*path, index)))
         return issues
     return []
@@ -294,9 +323,12 @@ def _resolve_env_vars(obj: object) -> object:
     if isinstance(obj, str):
         return _ENV_REF_PATTERN.sub(_env_replace, obj)
     if isinstance(obj, dict):
-        return {k: _resolve_env_vars(v) for k, v in obj.items()}
+        return {
+            key: _resolve_env_vars(value)
+            for key, value in cast(dict[str, object], obj).items()
+        }
     if isinstance(obj, list):
-        return [_resolve_env_vars(v) for v in obj]
+        return [_resolve_env_vars(value) for value in cast(list[object], obj)]
     return obj
 
 
@@ -310,15 +342,16 @@ def _env_replace(match: re.Match[str]) -> str:
     return value
 
 
-def _migrate_config(data: dict) -> dict:
+def _migrate_config(data: dict[str, Any]) -> dict[str, Any]:
     """Migrate old config formats to current."""
     # Move tools.exec.restrictToWorkspace → tools.restrictToWorkspace
-    tools = data.get("tools", {})
-    if not isinstance(tools, dict):
+    tools_value = data.get("tools", {})
+    if not isinstance(tools_value, dict):
         return data
-    exec_cfg = tools.get("exec", {})
+    tools = cast(dict[str, Any], tools_value)
+    exec_cfg = _as_config_object(tools.get("exec", {}))
     if (
-        isinstance(exec_cfg, dict)
+        exec_cfg is not None
         and "restrictToWorkspace" in exec_cfg
         and "restrictToWorkspace" not in tools
     ):
@@ -334,6 +367,7 @@ def _migrate_config(data: dict) -> dict:
             tools["my"] = my_cfg
         if not isinstance(my_cfg, dict):
             return data
+        my_cfg = cast(dict[str, Any], my_cfg)
         if "myEnabled" in tools and "enable" not in my_cfg:
             my_cfg["enable"] = tools.pop("myEnabled")
         else:

nanobot/config/paths.py

@@ -48,7 +48,7 @@ def get_webui_dir() -> Path:
     return get_runtime_subdir("webui")
 
 
-def get_workspace_path(workspace: str | None = None) -> Path:
+def get_workspace_path(workspace: str | Path | None = None) -> Path:
     """Resolve and ensure the agent workspace path."""
     path = Path(workspace).expanduser() if workspace else Path.home() / ".nanobot" / "workspace"
     return ensure_dir(path)

nanobot/config/schema.py

@@ -5,7 +5,7 @@ from pathlib import Path
 from typing import TYPE_CHECKING, Any, ClassVar, Literal
 
 from pydantic import AliasChoices, ConfigDict, Field, field_validator, model_validator
-from pydantic_settings import BaseSettings
+from pydantic_settings import BaseSettings, SettingsConfigDict
 
 from nanobot.config_base import Base
 from nanobot.cron.types import CronSchedule
@@ -618,7 +618,10 @@ class Config(BaseSettings):
                 return spec.default_api_base
         return None
 
-    model_config = ConfigDict(env_prefix="NANOBOT_", env_nested_delimiter="__")
+    model_config = SettingsConfigDict(
+        env_prefix="NANOBOT_",
+        env_nested_delimiter="__",
+    )
 
 
 def _resolve_tool_config_refs() -> None:

nanobot/config/watcher.py

@@ -5,7 +5,7 @@ from __future__ import annotations
 from collections.abc import Callable
 from pathlib import Path
 
-from watchfiles import Change, awatch
+from watchfiles import Change, awatch  # pyright: ignore[reportUnknownVariableType]
 
 
 async def watch_config_file(config_path: Path, on_change: Callable[[], None]) -> None:

nanobot/cron/__init__.py

@@ -1,13 +1,18 @@
 """Cron service for scheduled agent tasks."""
 
+from typing import TYPE_CHECKING, Any
+
 from nanobot.cron.types import CronJob, CronSchedule
 
+if TYPE_CHECKING:
+    from nanobot.cron.service import CronService
+
 __all__ = ["CronService", "CronJob", "CronSchedule"]
 
 _LAZY = {"CronService": ".service"}
 
 
-def __getattr__(name: str):
+def __getattr__(name: str) -> Any:
     module_path = _LAZY.get(name)
     if module_path is None:
         raise AttributeError(f"module {__name__!r} has no attribute {name!r}")

nanobot/cron/bound_runner.py

@@ -6,7 +6,7 @@ import asyncio
 import hashlib
 import time
 import uuid
-from typing import Any, Protocol
+from typing import TYPE_CHECKING, Any, Protocol
 
 from nanobot.agent.tools.cron import CronTool
 from nanobot.bus.events import InboundMessage, OutboundMessage
@@ -16,9 +16,12 @@ from nanobot.cron.types import CronJob
 from nanobot.cron.webui_metadata import cron_proactive_delivery_metadata
 from nanobot.utils.prompt_templates import render_template
 
+if TYPE_CHECKING:
+    from nanobot.agent.tools.registry import ToolRegistry
+
 
 class BoundCronAgent(Protocol):
-    tools: Any
+    tools: ToolRegistry
 
     async def submit_cron_turn(self, msg: InboundMessage) -> OutboundMessage | None:
         ...

nanobot/cron/service.py

@@ -10,6 +10,7 @@ from contextlib import suppress
 from dataclasses import asdict
 from datetime import datetime
 from pathlib import Path
+from types import EllipsisType
 from typing import Any, Callable, Coroutine, Literal
 
 from filelock import FileLock
@@ -160,7 +161,7 @@ class CronService:
         self._lock = FileLock(str(self._action_path.parent) + ".lock")
         self.on_job = on_job
         self._store: CronStore | None = None
-        self._timer_task: asyncio.Task | None = None
+        self._timer_task: asyncio.Task[None] | None = None
         self._running = False
         self._timer_active = False
         self.max_sleep_ms = max_sleep_ms
@@ -243,19 +244,21 @@ class CronService:
                 return None
         return jobs, version
 
-    def _merge_action(self):
+    def _merge_action(self) -> None:
         if not self._action_path.exists():
             return
 
-        jobs_map = {j.id: j for j in self._store.jobs}
-        def _update(params: dict):
+        jobs_map = {job.id: job for job in self._store.jobs}  # pyright: ignore[reportOptionalMemberAccess]
+
+        def _update(params: dict[str, Any]) -> None:
             j = CronJob.from_dict(params)
             _normalize_agent_turn_job(j)
             jobs_map[j.id] = j
 
-        def _del(params: dict):
-            if job_id := params.get("job_id"):
-                jobs_map.pop(job_id)
+        def _del(params: dict[str, Any]) -> None:
+            job_id = params.get("job_id")
+            if isinstance(job_id, str) and job_id:
+                jobs_map.pop(job_id, None)
 
         with self._lock:
             with open(self._action_path, "r", encoding="utf-8") as f:
@@ -274,7 +277,7 @@ class CronService:
                     except Exception:
                         logger.exception("load action line error")
                         continue
-            self._store.jobs = list(jobs_map.values())
+            self._store.jobs = list(jobs_map.values())  # pyright: ignore[reportOptionalMemberAccess]
             if self._running and changed:
                 self._action_path.write_text("", encoding="utf-8")
                 self._save_store()
@@ -569,7 +572,8 @@ class CronService:
         # Handle one-shot jobs
         if job.schedule.kind == "at":
             if job.delete_after_run:
-                self._store.jobs = [j for j in self._store.jobs if j.id != job.id]
+                store = self._require_store()
+                store.jobs = [item for item in store.jobs if item.id != job.id]
             else:
                 job.enabled = False
                 job.state.next_run_at_ms = None
@@ -577,7 +581,11 @@ class CronService:
             # Compute next run
             job.state.next_run_at_ms = _compute_next_run(job.schedule, _now_ms())
 
-    def _append_action(self, action: Literal["add", "del", "update"], params: dict):
+    def _append_action(
+        self,
+        action: Literal["add", "del", "update"],
+        params: dict[str, Any],
+    ) -> None:
         self.store_path.parent.mkdir(parents=True, exist_ok=True)
         with self._lock:
             with open(self._action_path, "a", encoding="utf-8") as f:
@@ -615,11 +623,11 @@ class CronService:
         channel: str | None = None,
         to: str | None = None,
         delete_after_run: bool = False,
-        channel_meta: dict | None = None,
+        channel_meta: dict[str, Any] | None = None,
         session_key: str | None = None,
         origin_channel: str | None = None,
         origin_chat_id: str | None = None,
-        origin_metadata: dict | None = None,
+        origin_metadata: dict[str, Any] | None = None,
     ) -> CronJob:
         """Add a new job."""
         _validate_schedule_for_add(schedule)
@@ -727,8 +735,8 @@ class CronService:
         schedule: CronSchedule | None = None,
         message: str | None = None,
         deliver: bool | None = None,
-        channel: str | None = ...,
-        to: str | None = ...,
+        channel: str | None | EllipsisType = ...,
+        to: str | None | EllipsisType = ...,
         delete_after_run: bool | None = None,
     ) -> CronJob | Literal["not_found", "protected"]:
         """Update mutable fields of an existing job. System jobs cannot be updated.
@@ -804,7 +812,7 @@ class CronService:
         store = self._require_store()
         return next((j for j in store.jobs if j.id == job_id), None)
 
-    def status(self) -> dict:
+    def status(self) -> dict[str, object]:
         """Get service status."""
         store = self._require_store()
         return {

nanobot/cron/types.py

@@ -3,11 +3,19 @@
 from __future__ import annotations
 
 from dataclasses import dataclass, field
-from typing import Any, Literal
+from typing import Any, Literal, cast, overload
 
 from nanobot.utils.dict_keys import get_camel_snake
 
 
+@overload
+def _store_int(value: Any, default: Literal[None]) -> int | None: ...
+
+
+@overload
+def _store_int(value: Any, default: int = 0) -> int: ...
+
+
 def _store_int(value: Any, default: int | None = 0) -> int | None:
     """Coerce JSON numerics to int; treat null/blank like a missing key."""
     if value is None or value == "":
@@ -103,7 +111,10 @@ class CronJobState:
 
     @classmethod
     def from_store_dict(cls, data: dict[str, Any]) -> CronJobState:
-        history = get_camel_snake(data, "runHistory", "run_history", []) or []
+        history = cast(
+            list[object],
+            get_camel_snake(data, "runHistory", "run_history", []) or [],
+        )
         return cls(
             next_run_at_ms=_store_int(
                 get_camel_snake(data, "nextRunAtMs", "next_run_at_ms"), None
@@ -116,7 +127,7 @@ class CronJobState:
             run_history=[
                 record
                 if isinstance(record, CronRunRecord)
-                else CronRunRecord.from_store_dict(record)
+                else CronRunRecord.from_store_dict(cast(dict[str, Any], record))
                 for record in history
                 if isinstance(record, (dict, CronRunRecord))
             ],
@@ -137,16 +148,20 @@ class CronJob:
     delete_after_run: bool = False
 
     @classmethod
-    def from_dict(cls, kwargs: dict):
-        state_kwargs = dict(kwargs.get("state", {}))
+    def from_dict(cls, kwargs: dict[str, Any]) -> CronJob:
+        state_kwargs = dict(cast(dict[str, Any], kwargs.get("state", {})))
         state_kwargs["run_history"] = [
-            record if isinstance(record, CronRunRecord) else CronRunRecord(**record)
-            for record in state_kwargs.get("run_history", [])
+            record
+            if isinstance(record, CronRunRecord)
+            else CronRunRecord(**cast(dict[str, Any], record))
+            for record in cast(list[object], state_kwargs.get("run_history", []))
         ]
-        kwargs["schedule"] = CronSchedule(**kwargs.get("schedule", {"kind": "every"}))
-        kwargs["payload"] = CronPayload(**kwargs.get("payload", {}))
+        kwargs["schedule"] = CronSchedule(
+            **cast(dict[str, Any], kwargs.get("schedule", {"kind": "every"}))
+        )
+        kwargs["payload"] = CronPayload(**cast(dict[str, Any], kwargs.get("payload", {})))
         kwargs["state"] = CronJobState(**state_kwargs)
-        return cls(**kwargs)
+        return cls(**cast(Any, kwargs))
 
     @classmethod
     def from_store_dict(cls, data: dict[str, Any]) -> CronJob:

nanobot/gateway/runtime.py

@@ -69,7 +69,7 @@ class GatewayRuntimePaths(ProcessRuntimePaths):
         )
 
 
-class GatewayRuntime(ManagedProcessRuntime):
+class GatewayRuntime(ManagedProcessRuntime[ProcessStartOptions]):
     """Manage a background ``nanobot gateway`` process."""
 
     service_name = "gateway"

nanobot/optional_features.py

@@ -7,7 +7,7 @@ import sys
 from dataclasses import dataclass
 from importlib.metadata import PackageNotFoundError, distribution
 from pathlib import Path
-from typing import Any
+from typing import Any, cast
 
 from loguru import logger
 from packaging.requirements import Requirement
@@ -87,8 +87,8 @@ def optional_dependency_groups() -> dict[str, list[str] | None]:
     deps = project.get("optional-dependencies", {})
     if isinstance(deps, dict) and deps:
         return {
-            name: list(values)
-            for name, values in deps.items()
+            name: list(cast(list[str], values))
+            for name, values in cast(dict[str, object], deps).items()
             if name != "dev" and name not in _HIDDEN_OPTIONAL_FEATURES and isinstance(values, list)
         }
     return {
@@ -153,13 +153,13 @@ def _extra_dependencies_installed(
     normalized = canonicalize_name(requested_extra)
     provided = {
         canonicalize_name(value)
-        for value in (dist.metadata.get_all("Provides-Extra") or [])
+        for value in cast(list[str], dist.metadata.get_all("Provides-Extra") or [])
     }
     if provided and normalized not in provided:
         return False
 
     matched = False
-    for raw in dist.requires or []:
+    for raw in cast(list[str], dist.requires or []):
         req = Requirement(raw)
         if req.marker and not req.marker.evaluate({"extra": requested_extra}):
             continue
@@ -259,7 +259,7 @@ def read_config_data(path: Path) -> dict[str, Any]:
     if not path.exists():
         return {}
     with open(path, encoding="utf-8") as f:
-        return json.load(f)
+        return cast(dict[str, Any], json.load(f))
 
 
 def write_config_data(path: Path, data: dict[str, Any]) -> None:
@@ -312,7 +312,7 @@ def channel_enabled(
     if default_enabled is None:
         default_enabled = plugin.default_enabled if plugin is not None else channel_default_enabled(name)
     if section is None:
-        return default_enabled
+        return bool(default_enabled)
     if plugin is None:
         from nanobot.channels.registry import load_channel_plugin
 
@@ -421,7 +421,7 @@ def optional_features_payload(
         dependencies = _feature_dependencies(name, channel_plugin, extras)
         has_dependencies = bool(dependencies)
         installed = extra_installed(name, dependencies) if has_dependencies else True
-        feature = {
+        feature: dict[str, Any] = {
             "name": name,
             "display_name": (
                 channel_plugin.display_name
@@ -502,7 +502,7 @@ def optional_features_payload(
             })
         features.append(feature)
 
-    payload = {
+    payload: dict[str, Any] = {
         "features": features,
         "enabled_count": sum(1 for feature in features if feature["enabled"]),
     }
@@ -520,13 +520,16 @@ def with_channel_runtime_status(
     for status in runtime_status.values():
         if not isinstance(status, dict):
             continue
-        owner = status.get("owner")
+        status_object = cast(dict[str, Any], status)
+        owner = status_object.get("owner")
         if isinstance(owner, str):
-            statuses_by_owner.setdefault(owner, []).append(status)
+            statuses_by_owner.setdefault(owner, []).append(status_object)
 
     features: list[dict[str, Any]] = []
-    for original in payload.get("features", []):
-        feature = dict(original)
+    for raw_feature in cast(list[object], payload.get("features", [])):
+        if not isinstance(raw_feature, dict):
+            continue
+        feature = cast(dict[str, Any], raw_feature).copy()
         if feature.get("type") != "channel":
             features.append(feature)
             continue
@@ -546,9 +549,11 @@ def with_channel_runtime_status(
                 str(status.get("instance_id", "default")): status
                 for status in owner_statuses
             }
-            decorated_instances = []
-            for original_instance in instances:
-                instance = dict(original_instance)
+            decorated_instances: list[dict[str, Any]] = []
+            for original_instance in cast(list[object], instances):
+                if not isinstance(original_instance, dict):
+                    continue
+                instance = cast(dict[str, Any], original_instance).copy()
                 desired_instance = bool(instance.get("enabled"))
                 status = by_instance.get(str(instance.get("id", "default")))
                 if desired_instance and status is None:

nanobot/pairing/store.py

@@ -13,12 +13,12 @@ import string
 import threading
 import time
 from pathlib import Path
-from typing import Any
+from typing import Any, cast
 
 from loguru import logger
 
 from nanobot.config.paths import get_data_dir
-from nanobot.utils.helpers import _write_text_atomic
+from nanobot.utils.helpers import _write_text_atomic  # pyright: ignore[reportPrivateUsage]
 
 # threading.Lock is used so store functions remain callable from both sync CLI
 # and async channel handlers.  At private-assistant scale (small JSON file,
@@ -47,21 +47,20 @@ def _load() -> dict[str, Any]:
         logger.warning("Corrupted pairing store, resetting")
         return {"approved": {}, "pending": {}}
 
-    # JSON stores may contain null maps after partial edits; treat like {}.
-    approved = data.get("approved") or {}
-    if not isinstance(approved, dict):
-        approved = {}
+    # JSON stores may contain null or malformed maps after partial edits; treat like {}.
+    data = cast(dict[str, Any], data)
+    raw_approved = data.get("approved")
+    approved = cast(dict[str, Any], raw_approved) if isinstance(raw_approved, dict) else {}
     data["approved"] = approved
-    pending = data.get("pending") or {}
-    if not isinstance(pending, dict):
-        pending = {}
+    raw_pending = data.get("pending")
+    pending = cast(dict[str, Any], raw_pending) if isinstance(raw_pending, dict) else {}
     data["pending"] = pending
 
     # Convert approved lists to str sets for O(1) lookup.
     for channel, users in approved.items():
         if not isinstance(users, list):
             users = []
-        data["approved"][channel] = {str(u) for u in users}
+        data["approved"][channel] = {str(user) for user in cast(list[object], users)}
     return data
 
 
@@ -69,14 +68,12 @@ def _save(data: dict[str, Any]) -> None:
     path = _store_path()
     path.parent.mkdir(parents=True, exist_ok=True)
     # Convert sets back to lists for JSON serialization
-    approved = data.get("approved") or {}
-    pending = data.get("pending") or {}
-    if not isinstance(approved, dict):
-        approved = {}
-    if not isinstance(pending, dict):
-        pending = {}
-    payload = {
-        "approved": {ch: sorted(list(users)) for ch, users in approved.items()},
+    raw_approved = data.get("approved")
+    approved = cast(dict[str, Any], raw_approved) if isinstance(raw_approved, dict) else {}
+    raw_pending = data.get("pending")
+    pending = cast(dict[str, Any], raw_pending) if isinstance(raw_pending, dict) else {}
+    payload: dict[str, Any] = {
+        "approved": {ch: sorted(list(cast(set[str], users))) for ch, users in approved.items()},
         "pending": dict(pending),
     }
     _write_text_atomic(path, json.dumps(payload, indent=2, ensure_ascii=False))
@@ -86,22 +83,22 @@ def _gc_pending(data: dict[str, Any]) -> None:
     """Remove expired pending entries in-place."""
     now = time.time()
     pending: dict[str, Any] = data.get("pending") or {}
-    if not isinstance(pending, dict):
-        data["pending"] = {}
-        return
-    expired = [
-        code
-        for code, info in pending.items()
+    expired: list[str] = []
+    for code, info in pending.items():
+        if not isinstance(info, dict):
+            expired.append(code)
+            continue
+        entry = cast(dict[str, Any], info)
+        expires_at = entry.get("expires_at")
         if (
-            not isinstance(info, dict)
-            or not isinstance(info.get("channel"), str)
-            or not info.get("channel")
-            or info.get("sender_id") is None
-            or isinstance(info.get("expires_at"), bool)
-            or not isinstance(info.get("expires_at"), (int, float))
-            or info["expires_at"] < now
-        )
-    ]
+            not isinstance(entry.get("channel"), str)
+            or not entry["channel"]
+            or entry.get("sender_id") is None
+            or isinstance(expires_at, bool)
+            or not isinstance(expires_at, (int, float))
+            or expires_at < now
+        ):
+            expired.append(code)
     for code in expired:
         del pending[code]
     data["pending"] = pending
@@ -322,13 +319,13 @@ def handle_pairing_command(channel: str, subcommand_text: str) -> str:
         if len(parts) == 2:
             return (
                 f"Revoked {arg} from {channel}"
-                if revoke(channel, arg)
+                if revoke(channel, parts[1])
                 else f"{arg} was not in the approved list for {channel}"
             )
         if len(parts) == 3:
             return (
                 f"Revoked {parts[2]} from {arg}"
-                if revoke(arg, parts[2])
+                if revoke(parts[1], parts[2])
                 else f"{parts[2]} was not in the approved list for {arg}"
             )
         return "Usage: `/pairing revoke <user_id>` or `/pairing revoke <channel> <user_id>`"

nanobot/process_runtime.py

@@ -15,7 +15,7 @@ from contextlib import suppress
 from dataclasses import dataclass
 from datetime import UTC, datetime
 from pathlib import Path
-from typing import Any
+from typing import Any, Generic, TypeVar, cast
 
 from filelock import FileLock
 
@@ -63,7 +63,10 @@ class ProcessRuntimePaths:
     log_path: Path
 
 
-class ManagedProcessRuntime:
+_StartOptionsT = TypeVar("_StartOptionsT", bound=ProcessStartOptions)
+
+
+class ManagedProcessRuntime(Generic[_StartOptionsT]):
     """Manage a detached child process without service-specific policy."""
 
     service_name = "process"
@@ -100,12 +103,12 @@ class ManagedProcessRuntime:
         state["started_at"] = _utc_now()
         runtime._write_state(state)
 
-    def start_background(self, options: ProcessStartOptions) -> ProcessResult:
+    def start_background(self, options: _StartOptionsT) -> ProcessResult:
         """Start the configured command as a detached process."""
         with self._lifecycle_lock():
             return self._start_background(options)
 
-    def _start_background(self, options: ProcessStartOptions) -> ProcessResult:
+    def _start_background(self, options: _StartOptionsT) -> ProcessResult:
         current = self.status()
         if current.running:
             return ProcessResult(False, self._message("already_running"), current)
@@ -174,7 +177,7 @@ class ManagedProcessRuntime:
         self._clear_state()
         return ProcessResult(True, self._message("stopped"), self.status(reason="stopped"))
 
-    def restart(self, options: ProcessStartOptions, *, timeout_s: int = 20) -> ProcessResult:
+    def restart(self, options: _StartOptionsT, *, timeout_s: int = 20) -> ProcessResult:
         """Restart the managed process."""
         with self._lifecycle_lock():
             stop_result = self._stop(timeout_s=timeout_s)
@@ -195,6 +198,7 @@ class ManagedProcessRuntime:
                 log_path=self.paths.log_path,
                 reason=reason or "not_started",
             )
+        assert state is not None
 
         if not self._is_pid_running(pid) or not self._record_matches_process(state, pid):
             self._clear_state()
@@ -214,7 +218,7 @@ class ManagedProcessRuntime:
             log_path=self.paths.log_path,
             started_at=_as_str(state.get("started_at")),
             port=_as_int(state.get("port")),
-            command=tuple(command) if isinstance(command, list) else (),
+            command=tuple(cast(list[str], command)) if isinstance(command, list) else (),
             reason=reason or "running",
         )
 
@@ -253,7 +257,7 @@ class ManagedProcessRuntime:
         lock_path = self.paths.state_path.with_name(f"{self.paths.state_path.name}.lock")
         return FileLock(str(lock_path))
 
-    def _build_child_command(self, options: ProcessStartOptions) -> list[str]:
+    def _build_child_command(self, options: _StartOptionsT) -> list[str]:
         raise NotImplementedError
 
     def _popen_platform_kwargs(self) -> dict[str, Any]:
@@ -365,7 +369,7 @@ class ManagedProcessRuntime:
                 payload = json.load(handle)
         except (OSError, json.JSONDecodeError, ValueError):
             return None
-        return payload if isinstance(payload, dict) else None
+        return cast(dict[str, Any], payload) if isinstance(payload, dict) else None
 
     def _write_state(self, payload: dict[str, Any]) -> None:
         self.paths.run_dir.mkdir(parents=True, exist_ok=True)

nanobot/providers/anthropic_provider.py

@@ -9,8 +9,8 @@ import re
 import secrets
 import string
 from collections import deque
-from collections.abc import Awaitable, Callable
-from typing import Any
+from collections.abc import Awaitable, Callable, Iterable
+from typing import Any, cast
 
 from loguru import logger
 
@@ -198,7 +198,13 @@ class AnthropicProvider(LLMProvider):
             content = msg.get("content")
 
             if role == "system":
-                system = content if isinstance(content, (str, list)) else str(content or "")
+                system = (
+                    cast(list[dict[str, Any]], content)
+                    if isinstance(content, list)
+                    else content
+                    if isinstance(content, str)
+                    else str(content or "")
+                )
                 continue
 
             if role == "tool":
@@ -206,7 +212,7 @@ class AnthropicProvider(LLMProvider):
                 if raw and raw[-1]["role"] == "user":
                     prev_c = raw[-1]["content"]
                     if isinstance(prev_c, list):
-                        prev_c.append(block)
+                        cast(list[Any], prev_c).append(block)
                     else:
                         raw[-1]["content"] = [
                             {"type": "text", "text": prev_c or ""}, block,
@@ -264,41 +270,49 @@ class AnthropicProvider(LLMProvider):
         blocks: list[dict[str, Any]] = []
         content = msg.get("content")
 
-        for tb in msg.get("thinking_blocks") or []:
-            if isinstance(tb, dict) and tb.get("type") == "thinking":
-                blocks.append({
-                    "type": "thinking",
-                    "thinking": tb.get("thinking", ""),
-                    "signature": tb.get("signature", ""),
-                })
+        for tb in cast(Iterable[object], msg.get("thinking_blocks") or []):
+            if isinstance(tb, dict):
+                thinking_block = cast(dict[str, Any], tb)
+                if thinking_block.get("type") == "thinking":
+                    blocks.append({
+                        "type": "thinking",
+                        "thinking": thinking_block.get("thinking", ""),
+                        "signature": thinking_block.get("signature", ""),
+                    })
 
         if isinstance(content, str) and content:
             blocks.append({"type": "text", "text": content})
         elif isinstance(content, list):
-            for item in content:
+            for item in cast(list[object], content):
                 if isinstance(item, dict):
-                    if not item.get("type"):
+                    content_block = cast(dict[str, Any], item)
+                    if not content_block.get("type"):
                         # Anthropic requires every content block to declare a "type".
                         # A tool that returned a bare dict lands here; coerce it to
                         # a text block instead of emitting one that the API rejects.
                         blocks.append({
                             "type": "text",
-                            "text": AnthropicProvider._stringify_typeless_block(item),
+                            "text": AnthropicProvider._stringify_typeless_block(content_block),
                         })
                     else:
-                        blocks.append(item)
+                        blocks.append(content_block)
                 else:
                     blocks.append({"type": "text", "text": str(item)})
 
-        for tc in msg.get("tool_calls") or []:
+        for tc in cast(Iterable[object], msg.get("tool_calls") or []):
             if not isinstance(tc, dict):
                 continue
-            func = tc.get("function", {})
+            tool_call = cast(dict[str, Any], tc)
+            func = cast(dict[str, Any], tool_call.get("function", {}))
             args = func.get("arguments", "{}")
-            raw_id = tc.get("id") or _gen_tool_id()
+            raw_id = tool_call.get("id") or _gen_tool_id()
             blocks.append({
                 "type": "tool_use",
-                "id": map_tool_id(raw_id) if map_tool_id is not None else _sanitize_tool_id(raw_id),
+                "id": (
+                    map_tool_id(raw_id)
+                    if map_tool_id is not None
+                    else _sanitize_tool_id(cast(str, raw_id))
+                ),
                 "name": func.get("name", ""),
                 "input": tool_arguments_object_for_replay(args),
             })
@@ -314,26 +328,27 @@ class AnthropicProvider(LLMProvider):
             return str(content)
 
         result: list[dict[str, Any]] = []
-        for item in content:
+        for item in cast(list[object], content):
             if not isinstance(item, dict):
                 result.append({"type": "text", "text": str(item)})
                 continue
-            if item.get("type") == "image_url":
-                converted = AnthropicProvider._convert_image_block(item)
+            content_block = cast(dict[str, Any], item)
+            if content_block.get("type") == "image_url":
+                converted = AnthropicProvider._convert_image_block(content_block)
                 if converted:
                     result.append(converted)
                 continue
-            if not item.get("type"):
+            if not content_block.get("type"):
                 # Anthropic requires every content block to declare a "type".
                 # A tool that returned a bare dict (or a list of dicts) lands
                 # here; coerce it to a text block instead of emitting a block
                 # the API rejects with "content.0.type: Field required".
                 result.append({
                     "type": "text",
-                    "text": AnthropicProvider._stringify_typeless_block(item),
+                    "text": AnthropicProvider._stringify_typeless_block(content_block),
                 })
                 continue
-            result.append(item)
+            result.append(content_block)
         return result or "(empty)"
 
     @staticmethod
@@ -343,7 +358,8 @@ class AnthropicProvider(LLMProvider):
     @staticmethod
     def _convert_image_block(block: dict[str, Any]) -> dict[str, Any] | None:
         """Convert OpenAI image_url block to Anthropic image block."""
-        url = (block.get("image_url") or {}).get("url", "")
+        image_url = cast(dict[str, Any], block.get("image_url") or {})
+        url = cast(str, image_url.get("url", ""))
         if not url:
             return None
         m = re.match(r"data:(image/\w+);base64,(.+)", url, re.DOTALL)
@@ -367,10 +383,13 @@ class AnthropicProvider(LLMProvider):
         content = msg.get("content")
         if not isinstance(content, list):
             return False
-        return any(
-            isinstance(block, dict) and block.get("type") == "tool_use"
-            for block in content
-        )
+        for block in cast(list[object], content):
+            if (
+                isinstance(block, dict)
+                and cast(dict[str, Any], block).get("type") == "tool_use"
+            ):
+                return True
+        return False
 
     @staticmethod
     def _merge_consecutive(msgs: list[dict[str, Any]]) -> list[dict[str, Any]]:
@@ -402,7 +421,7 @@ class AnthropicProvider(LLMProvider):
                 if isinstance(cur_c, str):
                     cur_c = [{"type": "text", "text": cur_c}]
                 if isinstance(cur_c, list):
-                    prev_c.extend(cur_c)
+                    cast(list[Any], prev_c).extend(cast(list[Any], cur_c))
                 merged[-1]["content"] = prev_c
             else:
                 merged.append(msg)
@@ -446,7 +465,7 @@ class AnthropicProvider(LLMProvider):
     def _convert_tools(tools: list[dict[str, Any]] | None) -> list[dict[str, Any]] | None:
         if not tools:
             return None
-        result = []
+        result: list[dict[str, Any]] = []
         for tool in tools:
             func = tool.get("function", tool)
             entry: dict[str, Any] = {
@@ -506,7 +525,7 @@ class AnthropicProvider(LLMProvider):
             if isinstance(c, str):
                 new_msgs[-2] = {**m, "content": [{"type": "text", "text": c, "cache_control": marker}]}
             elif isinstance(c, list) and c:
-                nc = list(c)
+                nc = list(cast(list[dict[str, Any]], c))
                 nc[-1] = {**nc[-1], "cache_control": marker}
                 new_msgs[-2] = {**m, "content": nc}
 
@@ -570,7 +589,7 @@ class AnthropicProvider(LLMProvider):
                 kwargs["temperature"] = 1.0
         elif thinking_enabled:
             budget_map = {"low": 1024, "medium": 4096, "high": max(8192, max_tokens)}
-            budget = budget_map.get(reasoning_effort.lower(), 4096)
+            budget = budget_map.get(cast(str, reasoning_effort).lower(), 4096)
             kwargs["thinking"] = {"type": "enabled", "budget_tokens": budget}
             kwargs["max_tokens"] = max(max_tokens, budget + 4096)
             if not omit_temperature:
@@ -683,7 +702,7 @@ class AnthropicProvider(LLMProvider):
             reasoning_effort, tool_choice,
         )
         try:
-            response = await self._client.messages.create(**kwargs)
+            response = cast(Any, await self._client.messages.create(**kwargs))
             return self._parse_response(response)
         except Exception as e:
             if self._is_streaming_required_error(e):

nanobot/providers/azure_openai_provider.py

@@ -21,7 +21,7 @@ from __future__ import annotations
 
 import uuid
 from collections.abc import Awaitable, Callable
-from typing import Any
+from typing import Any, cast
 
 from openai import AsyncOpenAI
 
@@ -208,7 +208,7 @@ class AzureOpenAIProvider(LLMProvider):
             reasoning_effort, tool_choice,
         )
         try:
-            response = await self._client.responses.create(**body)
+            response = cast(Any, await self._client.responses.create(**body))
             return parse_response_output(response)
         except Exception as e:
             return self._handle_error(e)
@@ -234,7 +234,7 @@ class AzureOpenAIProvider(LLMProvider):
         body["stream"] = True
 
         try:
-            stream = await self._client.responses.create(**body)
+            stream = cast(Any, await self._client.responses.create(**body))
             content, tool_calls, finish_reason, usage, reasoning_content = (
                 await consume_sdk_stream(stream, on_content_delta, on_tool_call_delta)
             )

nanobot/providers/base.py

@@ -10,7 +10,7 @@ from contextlib import suppress
 from dataclasses import dataclass, field
 from datetime import datetime, timezone
 from email.utils import parsedate_to_datetime
-from typing import Any
+from typing import Any, cast
 
 import json_repair
 from loguru import logger
@@ -67,7 +67,8 @@ class ToolCallRequest:
         ``messages.content.N.tool_use.name: Input should be a valid string``),
         which permanently wedges the session.
         """
-        return isinstance(self.name, str) and bool(self.name)
+        runtime_name = cast(object, self.name)
+        return isinstance(runtime_name, str) and bool(runtime_name)
 
     def to_openai_tool_call(self) -> dict[str, Any]:
         """Serialize to an OpenAI-style tool_call payload."""
@@ -76,7 +77,7 @@ class ToolCallRequest:
             if isinstance(self.arguments, str)
             else json.dumps(self.arguments, ensure_ascii=False)
         )
-        tool_call = {
+        tool_call: dict[str, Any] = {
             "id": self.id,
             "type": "function",
             "function": {
@@ -126,7 +127,7 @@ def tool_arguments_object_for_replay(arguments: Any) -> dict[str, Any]:
     if arguments is None:
         return {}
     if isinstance(arguments, dict):
-        return arguments
+        return cast(dict[str, Any], arguments)
     if not isinstance(arguments, str):
         return {}
 
@@ -141,7 +142,7 @@ def tool_arguments_object_for_replay(arguments: Any) -> dict[str, Any]:
             parsed = json_repair.loads(stripped)
         except Exception:
             return {}
-    return parsed if isinstance(parsed, dict) else {}
+    return cast(dict[str, Any], parsed) if isinstance(parsed, dict) else {}
 
 
 def tool_arguments_json_for_replay(arguments: Any) -> str:
@@ -158,7 +159,7 @@ class LLMResponse:
     usage: dict[str, int] = field(default_factory=dict)
     retry_after: float | None = None  # Provider supplied retry wait in seconds.
     reasoning_content: str | None = None  # Kimi, DeepSeek-R1, MiMo etc.
-    thinking_blocks: list[dict] | None = None  # Anthropic extended thinking
+    thinking_blocks: list[dict[str, Any]] | None = None  # Anthropic extended thinking
     # Structured error metadata used by retry policy when finish_reason == "error".
     error_status_code: int | None = None
     error_kind: str | None = None  # e.g. "timeout", "connection"
@@ -298,19 +299,20 @@ class LLMProvider(ABC):
             if isinstance(content, list):
                 new_items: list[Any] = []
                 changed = False
-                for item in content:
+                for raw_item in cast(list[object], content):
+                    item = cast(dict[str, Any], raw_item) if isinstance(raw_item, dict) else None
                     if (
-                        isinstance(item, dict)
+                        item is not None
                         and item.get("type") in ("text", "input_text", "output_text")
                         and not item.get("text")
                     ):
                         changed = True
                         continue
-                    if isinstance(item, dict) and "_meta" in item:
+                    if item is not None and "_meta" in item:
                         new_items.append({k: v for k, v in item.items() if k != "_meta"})
                         changed = True
                     else:
-                        new_items.append(item)
+                        new_items.append(raw_item)
                 if changed:
                     clean = dict(msg)
                     if new_items:
@@ -332,7 +334,7 @@ class LLMProvider(ABC):
         # Defense-in-depth: scrub lone UTF-16 surrogates from every string leaf.
         # This is idempotent and no-op when messages are already clean.
         sanitized = sanitize_surrogates_deep(result)
-        return sanitized if isinstance(sanitized, list) else result
+        return cast(list[dict[str, Any]], sanitized) if isinstance(sanitized, list) else result
 
     @staticmethod
     def _tool_name(tool: dict[str, Any]) -> str:
@@ -341,8 +343,9 @@ class LLMProvider(ABC):
         if isinstance(name, str):
             return name
         fn = tool.get("function")
-        if isinstance(fn, dict):
-            fname = fn.get("name")
+        fn_object = cast(dict[str, Any], fn) if isinstance(fn, dict) else None
+        if fn_object is not None:
+            fname = fn_object.get("name")
             if isinstance(fname, str):
                 return fname
         return ""
@@ -372,7 +375,7 @@ class LLMProvider(ABC):
         allowed_keys: frozenset[str],
     ) -> list[dict[str, Any]]:
         """Keep only provider-safe message keys and normalize assistant content."""
-        sanitized = []
+        sanitized: list[dict[str, Any]] = []
         for msg in messages:
             clean = {k: v for k, v in msg.items() if k in allowed_keys}
             if clean.get("role") == "assistant" and "content" not in clean:
@@ -465,7 +468,7 @@ class LLMProvider(ABC):
     def _extract_error_type_code(cls, payload: Any) -> tuple[str | None, str | None]:
         data: dict[str, Any] | None = None
         if isinstance(payload, dict):
-            data = payload
+            data = cast(dict[str, Any], payload)
         elif isinstance(payload, str):
             text = payload.strip()
             if text:
@@ -474,16 +477,17 @@ class LLMProvider(ABC):
                 except Exception:
                     parsed = None
                 if isinstance(parsed, dict):
-                    data = parsed
-        if not isinstance(data, dict):
+                    data = cast(dict[str, Any], parsed)
+        if data is None:
             return None, None
 
         error_obj = data.get("error")
         type_value = data.get("type")
         code_value = data.get("code")
-        if isinstance(error_obj, dict):
-            type_value = error_obj.get("type") or type_value
-            code_value = error_obj.get("code") or code_value
+        error_object = cast(dict[str, Any], error_obj) if isinstance(error_obj, dict) else None
+        if error_object is not None:
+            type_value = error_object.get("type") or type_value
+            code_value = error_object.get("code") or code_value
 
         return cls._normalize_error_token(type_value), cls._normalize_error_token(code_value)
 
@@ -582,13 +586,14 @@ class LLMProvider(ABC):
     def _strip_image_content(messages: list[dict[str, Any]]) -> list[dict[str, Any]] | None:
         """Replace image_url blocks with text placeholder. Returns None if no images found."""
         found = False
-        result = []
+        result: list[dict[str, Any]] = []
         for msg in messages:
             content = msg.get("content")
             if isinstance(content, list):
-                new_content = []
-                for b in content:
-                    if isinstance(b, dict) and b.get("type") == "image_url":
+                new_content: list[Any] = []
+                for raw_block in cast(list[object], content):
+                    block = cast(dict[str, Any], raw_block) if isinstance(raw_block, dict) else None
+                    if block is not None and block.get("type") == "image_url":
                         placeholder = (
                             "[Image not delivered to model — "
                             "do not describe or reference it]"
@@ -596,7 +601,7 @@ class LLMProvider(ABC):
                         new_content.append({"type": "text", "text": placeholder})
                         found = True
                     else:
-                        new_content.append(b)
+                        new_content.append(raw_block)
                 result.append({**msg, "content": new_content})
             else:
                 result.append(msg)
@@ -614,8 +619,9 @@ class LLMProvider(ABC):
         for msg in messages:
             content = msg.get("content")
             if isinstance(content, list):
-                for i, b in enumerate(content):
-                    if isinstance(b, dict) and b.get("type") == "image_url":
+                for i, raw_block in enumerate(cast(list[object], content)):
+                    block = cast(dict[str, Any], raw_block) if isinstance(raw_block, dict) else None
+                    if block is not None and block.get("type") == "image_url":
                         placeholder = (
                             "[Image not delivered to model — "
                             "do not describe or reference it]"
@@ -815,7 +821,7 @@ class LLMProvider(ABC):
                 if value is not None:
                     return value
             if isinstance(headers, dict):
-                for key, value in headers.items():
+                for key, value in cast(dict[object, Any], headers).items():
                     if isinstance(key, str) and key.lower() == name.lower():
                         return value
             return None
@@ -986,7 +992,7 @@ class LLMProvider(ABC):
                 on_retry_wait=on_retry_wait,
             )
 
-        return last_response if last_response is not None else await call(**kw)
+        return last_response if last_response is not None else await call(**kw)  # pyright: ignore[reportUnnecessaryComparison]
 
     @abstractmethod
     def get_default_model(self) -> str:

nanobot/providers/bedrock_provider.py

@@ -1,3 +1,4 @@
+# pyright: reportMissingTypeStubs=false
 """AWS Bedrock Converse provider."""
 
 from __future__ import annotations
@@ -8,7 +9,7 @@ import json
 import os
 import re
 from collections.abc import Awaitable, Callable, Iterator
-from typing import Any
+from typing import Any, cast
 
 from nanobot.providers.base import (
     LLMProvider,
@@ -30,7 +31,10 @@ def _deep_merge(base: dict[str, Any], override: dict[str, Any]) -> dict[str, Any
     merged = dict(base)
     for key, value in override.items():
         if key in merged and isinstance(merged[key], dict) and isinstance(value, dict):
-            merged[key] = _deep_merge(merged[key], value)
+            merged[key] = _deep_merge(
+                cast(dict[str, Any], merged[key]),
+                cast(dict[str, Any], value),
+            )
         else:
             merged[key] = value
     return merged
@@ -77,7 +81,8 @@ class BedrockProvider(LLMProvider):
         session_kwargs: dict[str, Any] = {}
         if self.profile:
             session_kwargs["profile_name"] = self.profile
-        session = boto3.Session(**session_kwargs)
+        boto3_module = cast(Any, boto3)
+        session = boto3_module.Session(**session_kwargs)
 
         client_kwargs: dict[str, Any] = {}
         if self.region:
@@ -107,7 +112,8 @@ class BedrockProvider(LLMProvider):
 
     @staticmethod
     def _image_url_block(block: dict[str, Any]) -> dict[str, Any] | None:
-        url = (block.get("image_url") or {}).get("url", "")
+        image_url = cast(dict[str, Any], block.get("image_url") or {})
+        url = image_url.get("url", "")
         if not isinstance(url, str) or not url:
             return None
         match = _IMAGE_DATA_URL.match(url)
@@ -132,10 +138,11 @@ class BedrockProvider(LLMProvider):
             return [{"text": str(content)}]
 
         blocks: list[dict[str, Any]] = []
-        for item in content:
-            if not isinstance(item, dict):
-                blocks.append({"text": str(item)})
+        for raw_item in cast(list[object], content):
+            if not isinstance(raw_item, dict):
+                blocks.append({"text": str(raw_item)})
                 continue
+            item = cast(dict[str, Any], raw_item)
 
             item_type = item.get("type")
             if item_type in _TEXT_BLOCK_TYPES or "text" in item:
@@ -181,6 +188,7 @@ class BedrockProvider(LLMProvider):
         function = tool_call.get("function")
         if not isinstance(function, dict):
             return None
+        function = cast(dict[str, Any], function)
         args = tool_arguments_object_for_replay(function.get("arguments", {}))
         return {
             "toolUse": {
@@ -216,8 +224,10 @@ class BedrockProvider(LLMProvider):
     def _assistant_blocks(cls, msg: dict[str, Any]) -> list[dict[str, Any]]:
         blocks: list[dict[str, Any]] = []
 
-        for thinking in msg.get("thinking_blocks") or []:
-            if isinstance(thinking, dict):
+        thinking_values = cast(list[object], msg.get("thinking_blocks") or [])
+        for thinking_value in thinking_values:
+            if isinstance(thinking_value, dict):
+                thinking = cast(dict[str, Any], thinking_value)
                 reasoning = cls._reasoning_block(thinking)
                 if reasoning:
                     blocks.append(reasoning)
@@ -228,8 +238,10 @@ class BedrockProvider(LLMProvider):
         elif isinstance(content, list):
             blocks.extend(block for block in cls._content_blocks(content) if "text" in block)
 
-        for tool_call in msg.get("tool_calls") or []:
-            if isinstance(tool_call, dict):
+        tool_call_values = cast(list[object], msg.get("tool_calls") or [])
+        for tool_call_value in tool_call_values:
+            if isinstance(tool_call_value, dict):
+                tool_call = cast(dict[str, Any], tool_call_value)
                 block = cls._tool_use_block(tool_call)
                 if block:
                     blocks.append(block)
@@ -240,7 +252,8 @@ class BedrockProvider(LLMProvider):
     def _has_tool_use(msg: dict[str, Any]) -> bool:
         content = msg.get("content")
         return isinstance(content, list) and any(
-            isinstance(block, dict) and "toolUse" in block for block in content
+            isinstance(block, dict) and "toolUse" in block
+            for block in cast(list[object], content)
         )
 
     @staticmethod
@@ -249,12 +262,14 @@ class BedrockProvider(LLMProvider):
         for msg in messages:
             if merged and merged[-1].get("role") == msg.get("role"):
                 prev = merged[-1].setdefault("content", [])
-                cur = msg.get("content") or []
+                cur: Any = msg.get("content") or []
                 if not isinstance(prev, list):
                     prev = [{"text": str(prev)}]
                     merged[-1]["content"] = prev
+                else:
+                    prev = cast(list[Any], prev)
                 if isinstance(cur, list):
-                    prev.extend(cur)
+                    prev.extend(cast(list[Any], cur))
                 else:
                     prev.append({"text": str(cur)})
             else:
@@ -303,9 +318,12 @@ class BedrockProvider(LLMProvider):
             return None
         result: list[dict[str, Any]] = []
         for tool in tools:
-            func = tool.get("function") if isinstance(tool.get("function"), dict) else tool
-            if not isinstance(func, dict):
-                continue
+            function_value = tool.get("function")
+            func = (
+                cast(dict[str, Any], function_value)
+                if isinstance(function_value, dict)
+                else tool
+            )
             name = str(func.get("name") or "")
             if not name:
                 continue
@@ -330,9 +348,11 @@ class BedrockProvider(LLMProvider):
             content = msg.get("content")
             if not isinstance(content, list):
                 continue
-            for block in content:
-                if isinstance(block, dict) and ("toolUse" in block or "toolResult" in block):
-                    return True
+            for block_value in cast(list[object], content):
+                if isinstance(block_value, dict):
+                    block = cast(dict[str, Any], block_value)
+                    if "toolUse" in block or "toolResult" in block:
+                        return True
         return False
 
     @staticmethod
@@ -356,7 +376,8 @@ class BedrockProvider(LLMProvider):
         if tool_choice == "none":
             return None
         if isinstance(tool_choice, dict):
-            name = tool_choice.get("function", {}).get("name")
+            function = cast(dict[str, Any], tool_choice.get("function", {}))
+            name = function.get("name")
             if name:
                 return {"tool": {"name": str(name)}}
         return {"auto": {}}
@@ -457,8 +478,10 @@ class BedrockProvider(LLMProvider):
         reasoning = block.get("reasoningContent")
         if not isinstance(reasoning, dict):
             return None, None
+        reasoning = cast(dict[str, Any], reasoning)
         text_obj = reasoning.get("reasoningText")
         if isinstance(text_obj, dict):
+            text_obj = cast(dict[str, Any], text_obj)
             text = text_obj.get("text")
             if isinstance(text, str):
                 return text, {
@@ -480,15 +503,19 @@ class BedrockProvider(LLMProvider):
         reasoning_parts: list[str] = []
         tool_calls: list[ToolCallRequest] = []
         thinking_blocks: list[dict[str, Any]] = []
-        message = (response.get("output") or {}).get("message") or {}
+        output = cast(dict[str, Any], response.get("output") or {})
+        message = cast(dict[str, Any], output.get("message") or {})
 
-        for block in message.get("content") or []:
-            if not isinstance(block, dict):
+        content_blocks = cast(list[object], message.get("content") or [])
+        for block_value in content_blocks:
+            if not isinstance(block_value, dict):
                 continue
+            block = cast(dict[str, Any], block_value)
             if isinstance(block.get("text"), str):
-                content_parts.append(block["text"])
+                content_parts.append(cast(str, block["text"]))
             tool_use = block.get("toolUse")
             if isinstance(tool_use, dict):
+                tool_use = cast(dict[str, Any], tool_use)
                 arguments = tool_use.get("input", {})
                 tool_calls.append(ToolCallRequest(
                     id=str(tool_use.get("toolUseId") or ""),
@@ -504,8 +531,8 @@ class BedrockProvider(LLMProvider):
         return LLMResponse(
             content="".join(content_parts) or None,
             tool_calls=tool_calls,
-            finish_reason=cls._finish_reason(response.get("stopReason")),
-            usage=cls._usage(response.get("usage")),
+            finish_reason=cls._finish_reason(cast(str | None, response.get("stopReason"))),
+            usage=cls._usage(cast(dict[str, Any] | None, response.get("usage"))),
             reasoning_content="".join(reasoning_parts) or None,
             thinking_blocks=thinking_blocks or None,
         )
@@ -522,11 +549,12 @@ class BedrockProvider(LLMProvider):
         state: dict[str, Any],
     ) -> str | None:
         if "contentBlockStart" in event:
-            data = event["contentBlockStart"]
+            data = cast(dict[str, Any], event["contentBlockStart"])
             idx = int(data.get("contentBlockIndex") or 0)
-            start = data.get("start") or {}
+            start = cast(dict[str, Any], data.get("start") or {})
             tool_use = start.get("toolUse")
             if isinstance(tool_use, dict):
+                tool_use = cast(dict[str, Any], tool_use)
                 tool_buffers[idx] = {
                     "id": str(tool_use.get("toolUseId") or ""),
                     "name": str(tool_use.get("name") or ""),
@@ -535,21 +563,27 @@ class BedrockProvider(LLMProvider):
             return None
 
         if "contentBlockDelta" in event:
-            data = event["contentBlockDelta"]
+            data = cast(dict[str, Any], event["contentBlockDelta"])
             idx = int(data.get("contentBlockIndex") or 0)
-            delta = data.get("delta") or {}
+            delta = cast(dict[str, Any], data.get("delta") or {})
             text = delta.get("text")
             if isinstance(text, str):
                 content_parts.append(text)
                 return text
             tool_delta = delta.get("toolUse")
             if isinstance(tool_delta, dict):
+                tool_delta = cast(dict[str, Any], tool_delta)
                 buf = tool_buffers.setdefault(idx, {"id": "", "name": "", "input": ""})
                 if isinstance(tool_delta.get("input"), str):
                     buf["input"] += tool_delta["input"]
             reasoning = delta.get("reasoningContent")
             if isinstance(reasoning, dict):
-                buf = state.setdefault("reasoning_buffers", {}).setdefault(
+                reasoning = cast(dict[str, Any], reasoning)
+                reasoning_buffers = cast(
+                    dict[int, dict[str, Any]],
+                    state.setdefault("reasoning_buffers", {}),
+                )
+                buf = reasoning_buffers.setdefault(
                     idx, {"text": "", "signature": "", "redactedContent": None}
                 )
                 if isinstance(reasoning.get("text"), str):
@@ -562,8 +596,13 @@ class BedrockProvider(LLMProvider):
             return None
 
         if "contentBlockStop" in event:
-            idx = int((event["contentBlockStop"] or {}).get("contentBlockIndex") or 0)
-            reasoning_buf = state.setdefault("reasoning_buffers", {}).pop(idx, None)
+            stop = cast(dict[str, Any], event["contentBlockStop"] or {})
+            idx = int(stop.get("contentBlockIndex") or 0)
+            reasoning_buffers = cast(
+                dict[int, dict[str, Any]],
+                state.setdefault("reasoning_buffers", {}),
+            )
+            reasoning_buf = reasoning_buffers.pop(idx, None)
             if reasoning_buf:
                 if reasoning_buf.get("text"):
                     thinking_blocks.append({
@@ -589,11 +628,12 @@ class BedrockProvider(LLMProvider):
             return None
 
         if "messageStop" in event:
-            state["stop_reason"] = (event["messageStop"] or {}).get("stopReason")
+            message_stop = cast(dict[str, Any], event["messageStop"] or {})
+            state["stop_reason"] = message_stop.get("stopReason")
             return None
 
         if "metadata" in event:
-            metadata = event["metadata"] or {}
+            metadata = cast(dict[str, Any], event["metadata"] or {})
             if isinstance(metadata.get("usage"), dict):
                 state["usage"] = metadata["usage"]
             return None
@@ -631,14 +671,29 @@ class BedrockProvider(LLMProvider):
 
     @classmethod
     def _handle_error(cls, e: Exception) -> LLMResponse:
-        response = getattr(e, "response", None)
-        metadata = response.get("ResponseMetadata", {}) if isinstance(response, dict) else {}
-        headers = metadata.get("HTTPHeaders") if isinstance(metadata, dict) else None
-        error_obj = response.get("Error", {}) if isinstance(response, dict) else {}
-        message = error_obj.get("Message") if isinstance(error_obj, dict) else None
-        code = error_obj.get("Code") if isinstance(error_obj, dict) else None
-        status_code = metadata.get("HTTPStatusCode") if isinstance(metadata, dict) else None
-        body = message or str(e)
+        response_value = getattr(e, "response", None)
+        response = (
+            cast(dict[str, Any], response_value)
+            if isinstance(response_value, dict)
+            else {}
+        )
+        metadata_value = response.get("ResponseMetadata", {})
+        metadata = (
+            cast(dict[str, Any], metadata_value)
+            if isinstance(metadata_value, dict)
+            else {}
+        )
+        headers = metadata.get("HTTPHeaders")
+        error_value = response.get("Error", {})
+        error_obj = (
+            cast(dict[str, Any], error_value)
+            if isinstance(error_value, dict)
+            else {}
+        )
+        message = error_obj.get("Message")
+        code = error_obj.get("Code")
+        status_code = metadata.get("HTTPStatusCode")
+        body = cast(str, message or str(e))
         retry_after = cls._extract_retry_after_from_headers(headers)
         if retry_after is None:
             retry_after = cls._extract_retry_after(body)
@@ -683,7 +738,10 @@ class BedrockProvider(LLMProvider):
             kwargs = self._build_kwargs(
                 messages, tools, model, max_tokens, temperature, reasoning_effort, tool_choice
             )
-            response = await asyncio.to_thread(self._client.converse, **kwargs)
+            response = cast(
+                dict[str, Any],
+                await asyncio.to_thread(self._client.converse, **kwargs),
+            )
             return self._parse_response(response)
         except Exception as e:
             return self._handle_error(e)
@@ -713,8 +771,11 @@ class BedrockProvider(LLMProvider):
             kwargs = self._build_kwargs(
                 messages, tools, model, max_tokens, temperature, reasoning_effort, tool_choice
             )
-            response = await asyncio.to_thread(self._client.converse_stream, **kwargs)
-            stream = iter(response.get("stream") or [])
+            response = cast(
+                dict[str, Any],
+                await asyncio.to_thread(self._client.converse_stream, **kwargs),
+            )
+            stream = cast(Iterator[dict[str, Any]], iter(response.get("stream") or []))
             while True:
                 event = await asyncio.wait_for(
                     asyncio.to_thread(_next_or_none, stream),

nanobot/providers/factory.py

@@ -160,6 +160,8 @@ def _make_provider_core(
     elif backend == "azure_openai":
         from nanobot.providers.azure_openai_provider import AzureOpenAIProvider
 
+        if p is None or p.api_base is None:
+            raise RuntimeError("validated Azure provider setup is missing api_base")
         provider = AzureOpenAIProvider(
             api_key=p.api_key or "",
             api_base=p.api_base,

nanobot/providers/fallback_provider.py

@@ -1,5 +1,7 @@
 """Provider wrapper that transparently fails over to fallback models on error."""
 
+# pyright: reportIncompatibleMethodOverride=false, reportIncompatibleVariableOverride=false
+
 from __future__ import annotations
 
 import time
@@ -8,7 +10,7 @@ from typing import Any
 
 from loguru import logger
 
-from nanobot.providers.base import LLMProvider, LLMResponse
+from nanobot.providers.base import GenerationSettings, LLMProvider, LLMResponse
 
 # Circuit breaker tuned to match OpenAICompatProvider's Responses API breaker.
 _PRIMARY_FAILURE_THRESHOLD = 3
@@ -121,11 +123,11 @@ class FallbackProvider(LLMProvider):
         self._primary_tripped_at: float | None = None
 
     @property
-    def generation(self):
+    def generation(self) -> GenerationSettings:
         return self._primary.generation
 
     @generation.setter
-    def generation(self, value):
+    def generation(self, value: GenerationSettings) -> None:
         self._primary.generation = value
 
     def get_default_model(self) -> str:

nanobot/providers/github_copilot_provider.py

@@ -1,5 +1,7 @@
 """GitHub Copilot OAuth-backed provider."""
 
+# pyright: reportMissingTypeStubs=false
+
 from __future__ import annotations
 
 import asyncio
@@ -8,11 +10,13 @@ import time
 import webbrowser
 from collections.abc import Awaitable, Callable
 from contextlib import suppress
+from typing import Any, cast
 
 import httpx
 from oauth_cli_kit.models import OAuthToken
 from oauth_cli_kit.storage import FileTokenStorage
 
+from nanobot.providers.base import LLMResponse
 from nanobot.providers.openai_compat_provider import OpenAICompatProvider
 
 DEFAULT_GITHUB_DEVICE_CODE_URL = "https://github.com/login/device/code"
@@ -232,19 +236,19 @@ class GitHubCopilotProvider(OpenAICompatProvider):
         token = await self._get_copilot_access_token()
         client = await self._ensure_client()
         self.api_key = token
-        client.api_key = token
+        cast(Any, client).api_key = token
         return token
 
     async def chat(
         self,
-        messages: list[dict[str, object]],
-        tools: list[dict[str, object]] | None = None,
+        messages: list[dict[str, Any]],
+        tools: list[dict[str, Any]] | None = None,
         model: str | None = None,
         max_tokens: int = 4096,
         temperature: float = 0.7,
         reasoning_effort: str | None = None,
-        tool_choice: str | dict[str, object] | None = None,
-    ):
+        tool_choice: str | dict[str, Any] | None = None,
+    ) -> LLMResponse:
         await self._refresh_client_api_key()
         return await super().chat(
             messages=messages,
@@ -258,17 +262,17 @@ class GitHubCopilotProvider(OpenAICompatProvider):
 
     async def chat_stream(
         self,
-        messages: list[dict[str, object]],
-        tools: list[dict[str, object]] | None = None,
+        messages: list[dict[str, Any]],
+        tools: list[dict[str, Any]] | None = None,
         model: str | None = None,
         max_tokens: int = 4096,
         temperature: float = 0.7,
         reasoning_effort: str | None = None,
-        tool_choice: str | dict[str, object] | None = None,
-        on_content_delta: Callable[[str], None] | None = None,
+        tool_choice: str | dict[str, Any] | None = None,
+        on_content_delta: Callable[[str], Awaitable[None]] | None = None,
         on_thinking_delta: Callable[[str], Awaitable[None]] | None = None,
-        on_tool_call_delta: Callable[[dict[str, object]], Awaitable[None]] | None = None,
-    ):
+        on_tool_call_delta: Callable[[dict[str, Any]], Awaitable[None]] | None = None,
+    ) -> LLMResponse:
         await self._refresh_client_api_key()
         return await super().chat_stream(
             messages=messages,

nanobot/providers/image_generation.py

@@ -9,12 +9,13 @@ import re
 from abc import ABC, abstractmethod
 from dataclasses import dataclass
 from pathlib import Path
-from typing import Any
+from typing import Any, cast
 from urllib.parse import urljoin
 
 import httpx
 from loguru import logger
 
+from nanobot.config.schema import Config, ProviderConfig
 from nanobot.providers.registry import find_by_name
 from nanobot.security.network import (
     PinnedDNSAsyncTransport,
@@ -81,6 +82,18 @@ class GeneratedImageResponse:
     raw: dict[str, Any]
 
 
+def _as_json_object(value: object) -> dict[str, Any] | None:
+    """Narrow an untrusted provider response value to a JSON object."""
+    return cast(dict[str, Any], value) if isinstance(value, dict) else None
+
+
+def _as_json_objects(value: object) -> list[dict[str, Any]]:
+    """Return object entries from an untrusted provider response array."""
+    if not isinstance(value, list):
+        return []
+    return [cast(dict[str, Any], item) for item in cast(list[object], value) if isinstance(item, dict)]
+
+
 def _read_image_b64(path: str | Path) -> tuple[str, str]:
     """Return ``(mime, base64)`` for the image at ``path``."""
     p = Path(path).expanduser()
@@ -249,7 +262,7 @@ def image_gen_provider_names() -> tuple[str, ...]:
     return tuple(_IMAGE_GEN_PROVIDERS)
 
 
-def image_gen_provider_configs(config: Any) -> dict[str, Any]:
+def image_gen_provider_configs(config: Config) -> dict[str, ProviderConfig]:
     providers_cfg = config.providers
     return {
         name: pc
@@ -315,7 +328,7 @@ class ImageGenerationProvider(ABC):
     def _require_images(self, images: list[str], data: dict[str, Any]) -> None:
         if images:
             return
-        provider_error = data.get("error") if isinstance(data, dict) else None
+        provider_error = data.get("error")
         label = self.provider_name
         if provider_error:
             raise ImageGenerationError(f"{label} returned no images: {provider_error}")
@@ -410,20 +423,17 @@ class OpenRouterImageGenerationClient(ImageGenerationProvider):
             detail = response.text[:500]
             raise ImageGenerationError(f"OpenRouter image generation failed: {detail}") from exc
 
-        data = response.json()
+        data = _as_json_object(response.json()) or {}
         images: list[str] = []
         text_parts: list[str] = []
-        for choice in data.get("choices") or []:
-            if not isinstance(choice, dict):
-                continue
-            message = choice.get("message") or {}
-            if isinstance(message.get("content"), str):
-                text_parts.append(message["content"])
-            for image in message.get("images") or []:
-                if not isinstance(image, dict):
-                    continue
-                image_url = image.get("image_url") or image.get("imageUrl") or {}
-                url_value = image_url.get("url") if isinstance(image_url, dict) else None
+        for choice in _as_json_objects(data.get("choices")):
+            message = _as_json_object(choice.get("message")) or {}
+            message_content = message.get("content")
+            if isinstance(message_content, str):
+                text_parts.append(message_content)
+            for image in _as_json_objects(message.get("images")):
+                image_url = _as_json_object(image.get("image_url") or image.get("imageUrl"))
+                url_value = image_url.get("url") if image_url is not None else None
                 if isinstance(url_value, str) and url_value.startswith("data:image/"):
                     images.append(url_value)
 
@@ -527,7 +537,7 @@ class AIHubMixImageGenerationClient(ImageGenerationProvider):
             detail = response.text[:500]
             raise ImageGenerationError(f"AIHubMix image generation failed: {detail}") from exc
 
-        payload = response.json()
+        payload = _as_json_object(response.json()) or {}
         images = await _aihubmix_images_from_payload(payload, proxy=self.proxy)
 
         self._require_images(images, payload)
@@ -538,11 +548,12 @@ class AIHubMixImageGenerationClient(ImageGenerationProvider):
 def _http_error_detail(response: httpx.Response) -> str:
     """Extract a readable error message from an HTTP error response."""
     try:
-        data = response.json()
-        if isinstance(data, dict):
-            err = data.get("error")
-            if isinstance(err, dict):
-                return err.get("message") or str(err)
+        data = _as_json_object(response.json())
+        if data is not None:
+            err = _as_json_object(data.get("error"))
+            if err is not None:
+                message = err.get("message")
+                return message if isinstance(message, str) else str(err)
             if err:
                 return str(err)
     except Exception:
@@ -595,11 +606,11 @@ def _ollama_image_data_url(value: str) -> str:
 def _ollama_images_from_payload(payload: dict[str, Any]) -> list[str]:
     images: list[str] = []
 
-    def collect(value: Any) -> None:
+    def collect(value: object) -> None:
         if isinstance(value, str) and value:
             images.append(_ollama_image_data_url(value))
         elif isinstance(value, list):
-            for item in value:
+            for item in cast(list[object], value):
                 collect(item)
 
     collect(payload.get("image"))
@@ -768,14 +779,12 @@ class GeminiImageGenerationClient(ImageGenerationProvider):
                 f"Gemini Imagen generation failed (HTTP {response.status_code}): {detail}"
             ) from exc
 
-        data = response.json()
+        data = _as_json_object(response.json()) or {}
         images: list[str] = []
-        for prediction in data.get("predictions") or []:
-            if not isinstance(prediction, dict):
-                continue
+        for prediction in _as_json_objects(data.get("predictions")):
             b64 = prediction.get("bytesBase64Encoded")
             mime = prediction.get("mimeType", "image/png")
-            if isinstance(b64, str) and b64:
+            if isinstance(b64, str) and b64 and isinstance(mime, str):
                 images.append(f"data:{mime};base64,{b64}")
 
         self._require_images(images, data)
@@ -824,23 +833,21 @@ class GeminiImageGenerationClient(ImageGenerationProvider):
                 f"Gemini image generation failed (HTTP {response.status_code}): {detail}"
             ) from exc
 
-        data = response.json()
+        data = _as_json_object(response.json()) or {}
         images: list[str] = []
         text_parts: list[str] = []
-        for candidate in data.get("candidates") or []:
-            if not isinstance(candidate, dict):
-                continue
-            content = candidate.get("content") or {}
-            for part in content.get("parts") or []:
-                if not isinstance(part, dict):
-                    continue
+        for candidate in _as_json_objects(data.get("candidates")):
+            content = _as_json_object(candidate.get("content")) or {}
+            for part in _as_json_objects(content.get("parts")):
                 if "text" in part:
-                    text_parts.append(part["text"])
-                inline = part.get("inlineData")
-                if isinstance(inline, dict):
+                    text = part["text"]
+                    if isinstance(text, str):
+                        text_parts.append(text)
+                inline = _as_json_object(part.get("inlineData"))
+                if inline is not None:
                     mime = inline.get("mimeType", "image/png")
                     b64 = inline.get("data", "")
-                    if b64:
+                    if isinstance(mime, str) and isinstance(b64, str) and b64:
                         images.append(f"data:{mime};base64,{b64}")
 
         self._require_images(images, data)
@@ -914,9 +921,9 @@ async def _aihubmix_images_from_payload(
     if "output" in payload:
         candidates.append(payload["output"])
 
-    async def collect(value: Any) -> None:
+    async def collect(value: object) -> None:
         if isinstance(value, list):
-            for item in value:
+            for item in cast(list[object], value):
                 await collect(item)
             return
         if isinstance(value, str):
@@ -925,32 +932,38 @@ async def _aihubmix_images_from_payload(
             elif value.startswith(("http://", "https://")):
                 images.append(await _download_image_data_url(value, proxy=proxy))
             return
-        if not isinstance(value, dict):
+        value_object = _as_json_object(value)
+        if value_object is None:
             return
 
-        b64_json = value.get("b64_json")
+        b64_json = value_object.get("b64_json")
         if isinstance(b64_json, str) and b64_json:
             images.append(_b64_image_data_url(b64_json))
         elif b64_json is not None:
             await collect(b64_json)
 
-        bytes_base64 = value.get("bytesBase64") or value.get("bytes_base64") or value.get("base64")
+        bytes_base64 = (
+            value_object.get("bytesBase64")
+            or value_object.get("bytes_base64")
+            or value_object.get("base64")
+        )
         if isinstance(bytes_base64, str) and bytes_base64:
             images.append(_b64_image_data_url(bytes_base64))
 
-        image_url = value.get("image_url") or value.get("imageUrl")
-        if isinstance(image_url, dict):
-            await collect(image_url.get("url"))
+        image_url = value_object.get("image_url") or value_object.get("imageUrl")
+        image_url_object = _as_json_object(image_url)
+        if image_url_object is not None:
+            await collect(image_url_object.get("url"))
         elif image_url is not None:
             await collect(image_url)
 
-        url_value = value.get("url")
+        url_value = value_object.get("url")
         if url_value is not None:
             await collect(url_value)
 
         for key in ("images", "image", "output"):
-            if key in value:
-                await collect(value[key])
+            if key in value_object:
+                await collect(value_object[key])
 
     for candidate in candidates:
         await collect(candidate)
@@ -1061,9 +1074,10 @@ def _minimax_images_from_payload(payload: dict[str, Any]) -> list[str]:
     """
     images: list[str] = []
     data = payload.get("data")
-    if not isinstance(data, dict):
+    data_object = _as_json_object(data)
+    if data_object is None:
         return images
-    for b64 in data.get("image_base64") or []:
+    for b64 in cast(list[object], data_object.get("image_base64") or []):
         if isinstance(b64, str) and b64:
             images.append(_b64_image_data_url(b64))
     return images
@@ -1381,11 +1395,14 @@ class CodexImageGenerationClient(ImageGenerationProvider):
         image_size: str | None = None,
     ) -> GeneratedImageResponse:
         try:
-            from oauth_cli_kit import get_token as get_codex_token
+            from oauth_cli_kit import (  # pyright: ignore[reportMissingTypeStubs]
+                get_token as _get_codex_token,
+            )
         except ImportError:
             raise ImageGenerationError(self.missing_key_message)
 
         try:
+            get_codex_token = cast(Any, _get_codex_token)
             token_kwargs = {"proxy": self.proxy} if self.proxy else {}
             token = await asyncio.to_thread(get_codex_token, **token_kwargs)
         except Exception as exc:
@@ -1405,9 +1422,9 @@ class CodexImageGenerationClient(ImageGenerationProvider):
                 len(reference_images),
             )
 
-        headers = {
+        headers: dict[str, str] = {
             "Authorization": f"Bearer {token.access}",
-            "chatgpt-account-id": token.account_id,
+            "chatgpt-account-id": str(token.account_id),
             "OpenAI-Beta": "responses=experimental",
             "originator": "nanobot",
             "User-Agent": "nanobot (python)",
@@ -1537,9 +1554,7 @@ async def _openai_images_from_payload(
     Handles both ``b64_json`` (preferred) and ``url`` (downloaded) formats.
     """
     images: list[str] = []
-    for item in payload.get("data") or []:
-        if not isinstance(item, dict):
-            continue
+    for item in _as_json_objects(payload.get("data")):
         b64 = item.get("b64_json")
         if isinstance(b64, str) and b64:
             images.append(_b64_image_data_url(b64))
@@ -1567,7 +1582,7 @@ async def _parse_codex_sse_images(
         line = line_bytes.strip()
         if line == "":
             if buffer:
-                data_lines = []
+                data_lines: list[str] = []
                 for bl in buffer:
                     if bl.startswith("data:"):
                         data_lines.append(bl[5:].strip())
@@ -1577,9 +1592,11 @@ async def _parse_codex_sse_images(
                     if raw == "[DONE]":
                         break
                     try:
-                        event = _json.loads(raw)
+                        event = _as_json_object(_json.loads(raw))
                     except Exception:
                         continue
+                    if event is None:
+                        continue
                     ev_type = event.get("type", "")
                     if ev_type in ("error", "response.failed"):
                         logger.error("Codex SSE failure: {}", raw[:2000])
@@ -1596,12 +1613,13 @@ async def _parse_codex_sse_images(
         raw = "".join(data_lines)
         if raw and raw != "[DONE]":
             try:
-                event = _json.loads(raw)
+                event = _as_json_object(_json.loads(raw))
             except Exception:
                 pass
             else:
-                _collect_images_from_sse_event(event, images)
-                _collect_text_from_sse_event(event, text_parts)
+                if event is not None:
+                    _collect_images_from_sse_event(event, images)
+                    _collect_text_from_sse_event(event, text_parts)
 
     return images, "".join(text_parts).strip()
 
@@ -1609,7 +1627,7 @@ async def _parse_codex_sse_images(
 def _collect_images_from_sse_event(event: dict[str, Any], images: list[str]) -> None:
     if event.get("type") != "response.output_item.done":
         return
-    item = event.get("item") or {}
+    item = _as_json_object(event.get("item")) or {}
     if item.get("type") != "image_generation_call":
         return
     result = item.get("result")
@@ -1618,8 +1636,8 @@ def _collect_images_from_sse_event(event: dict[str, Any], images: list[str]) ->
             images.append(result)
         else:
             images.append(_b64_image_data_url(result))
-    elif isinstance(result, dict):
-        image_url = result.get("image_url") or result.get("image") or ""
+    elif (result_object := _as_json_object(result)) is not None:
+        image_url = result_object.get("image_url") or result_object.get("image") or ""
         if isinstance(image_url, str):
             if image_url.startswith("data:image/"):
                 images.append(image_url)
@@ -1749,9 +1767,7 @@ def _stepfun_images_from_payload(payload: dict[str, Any]) -> list[str]:
     StepFun returns images in ``data[].b64_json`` (base64 strings).
     """
     images: list[str] = []
-    for item in payload.get("data") or []:
-        if not isinstance(item, dict):
-            continue
+    for item in _as_json_objects(payload.get("data")):
         b64 = item.get("b64_json")
         if isinstance(b64, str) and b64:
             images.append(_b64_image_data_url(b64))
@@ -1894,9 +1910,7 @@ async def _zhipu_images_from_payload(
     We download and re-encode as base64 data URLs.
     """
     images: list[str] = []
-    for item in payload.get("data") or []:
-        if not isinstance(item, dict):
-            continue
+    for item in _as_json_objects(payload.get("data")):
         url = item.get("url")
         if isinstance(url, str) and url:
             images.append(await _download_image_data_url(url, proxy=proxy))
@@ -2080,7 +2094,7 @@ class ModelScopeImageGenerationClient(ImageGenerationProvider):
         data: dict[str, Any],
     ) -> list[str]:
         images: list[str] = []
-        for url in data.get("output_images") or []:
+        for url in cast(list[object], data.get("output_images") or []):
             if isinstance(url, str) and url:
                 if url.startswith("data:image/"):
                     images.append(url)

nanobot/providers/openai_codex_provider.py

@@ -1,12 +1,14 @@
 """OpenAI Codex Responses Provider."""
 
+# pyright: reportMissingTypeStubs=false, reportPrivateUsage=false
+
 from __future__ import annotations
 
 import asyncio
 import hashlib
 import json
 from collections.abc import Awaitable, Callable
-from typing import Any
+from typing import Any, cast
 
 import httpx
 from loguru import logger
@@ -83,7 +85,7 @@ class OpenAICodexProvider(LLMProvider):
         stage = "oauth_token"
         try:
             token = await asyncio.to_thread(get_codex_token, proxy=self.proxy)
-            headers = _build_headers(token.account_id, token.access)
+            headers = _build_headers(cast(str, token.account_id), token.access)
 
             stage = "codex_request"
             try: