mirror of
https://github.com/HKUDS/nanobot.git
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1814 lines
76 KiB
Python
1814 lines
76 KiB
Python
"""Agent loop: the core processing engine."""
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from __future__ import annotations
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import asyncio
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import dataclasses
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import os
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import time
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from contextlib import AsyncExitStack, nullcontext, suppress
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from dataclasses import dataclass, field
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from enum import Enum, auto
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from functools import partial
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from pathlib import Path
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from typing import TYPE_CHECKING, Any, Awaitable, Callable
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from loguru import logger
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from nanobot.agent import context as agent_context
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from nanobot.agent import model_presets as preset_helpers
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from nanobot.agent.autocompact import AutoCompact
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from nanobot.agent.context import ContextBuilder
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from nanobot.agent.cron_turns import CronTurnCoordinator
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from nanobot.agent.hook import AgentHook, CompositeHook
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from nanobot.agent.memory import Consolidator
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from nanobot.agent.progress_hook import AgentProgressHook
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from nanobot.agent.runner import _MAX_INJECTIONS_PER_TURN, AgentRunner, AgentRunSpec
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from nanobot.agent.subagent import SubagentManager
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from nanobot.agent.tools.context import RequestContext, bind_request_context, reset_request_context
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from nanobot.agent.tools.file_state import FileStateStore, bind_file_states, reset_file_states
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from nanobot.agent.tools.message import MessageTool
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from nanobot.agent.tools.registry import ToolRegistry
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from nanobot.agent.tools.self import MyTool
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from nanobot.bus.events import InboundMessage, OutboundMessage
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from nanobot.bus.progress import build_bus_progress_callback
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from nanobot.bus.queue import MessageBus
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from nanobot.bus.runtime_events import (
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RuntimeEventBus,
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RuntimeEventPublisher,
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ensure_runtime_event_publisher,
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)
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from nanobot.command import CommandContext, CommandRouter, register_builtin_commands
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from nanobot.config.schema import AgentDefaults, ModelPresetConfig
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from nanobot.cron.session_turns import (
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cron_history_overrides,
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)
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from nanobot.providers.base import LLMProvider
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from nanobot.providers.factory import ProviderSnapshot
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from nanobot.security.workspace_access import (
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WorkspaceScopeResolver,
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bind_workspace_scope,
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reset_workspace_scope,
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)
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from nanobot.session import turn_continuation
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from nanobot.session.goal_state import (
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goal_state_runtime_lines,
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runner_wall_llm_timeout_s,
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sustained_goal_active,
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)
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from nanobot.session.keys import UNIFIED_SESSION_KEY, session_key_for_channel
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from nanobot.session.manager import Session, SessionManager
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from nanobot.utils.document import extract_documents, reference_non_image_attachments
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from nanobot.utils.helpers import image_placeholder_text
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from nanobot.utils.helpers import truncate_text as truncate_text_fn
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from nanobot.utils.image_generation_intent import image_generation_prompt
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from nanobot.utils.llm_runtime import LLMRuntime
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from nanobot.utils.runtime import (
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EMPTY_FINAL_RESPONSE_MESSAGE,
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SUSTAINED_GOAL_CONTINUE_PROMPT,
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)
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if TYPE_CHECKING:
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from nanobot.config.schema import (
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ChannelsConfig,
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ProviderConfig,
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ToolsConfig,
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)
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from nanobot.cron.service import CronService
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class TurnState(Enum):
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RESTORE = auto()
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COMPACT = auto()
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COMMAND = auto()
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BUILD = auto()
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RUN = auto()
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SAVE = auto()
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RESPOND = auto()
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DONE = auto()
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@dataclass
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class StateTraceEntry:
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state: TurnState
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started_at: float
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duration_ms: float
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event: str
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error: str | None = None
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@dataclass
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class TurnContext:
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msg: InboundMessage
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session_key: str
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state: TurnState
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turn_id: str
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session: Session | None = None
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history: list[dict[str, Any]] = field(default_factory=list)
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initial_messages: list[dict[str, Any]] = field(default_factory=list)
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final_content: str | None = None
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tools_used: list[str] = field(default_factory=list)
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all_messages: list[dict[str, Any]] = field(default_factory=list)
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stop_reason: str = ""
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had_injections: bool = False
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user_persisted_early: bool = False
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save_skip: int = 0
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outbound: OutboundMessage | None = None
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suppress_response: bool = False
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on_progress: Callable[..., Awaitable[None]] | None = None
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on_stream: Callable[[str], Awaitable[None]] | None = None
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on_stream_end: Callable[..., Awaitable[None]] | None = None
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on_retry_wait: Callable[[str], Awaitable[None]] | None = None
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pending_queue: asyncio.Queue | None = None
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pending_summary: str | None = None
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ephemeral: bool = False
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tools: ToolRegistry | None = None
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turn_wall_started_at: float = field(default_factory=time.time)
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visible_run_started_at: float | None = None
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turn_latency_ms: int | None = None
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trace: list[StateTraceEntry] = field(default_factory=list)
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class AgentLoop:
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"""
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The agent loop is the core processing engine.
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It:
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1. Receives messages from the bus
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2. Builds context with history, memory, skills
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3. Calls the LLM
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4. Executes tool calls
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5. Sends responses back
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"""
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@property
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def current_iteration(self) -> int:
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return self._current_iteration
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@property
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def tool_names(self) -> list[str]:
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return self.tools.tool_names
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def llm_runtime(self) -> LLMRuntime:
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"""Return the current provider/model pair owned by this loop."""
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self._refresh_provider_snapshot()
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return LLMRuntime(self.provider, self.model)
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_RUNTIME_CHECKPOINT_KEY = "runtime_checkpoint"
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_PENDING_USER_TURN_KEY = "pending_user_turn"
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# Event-driven state transition table.
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# Handlers return an event string; the driver looks up the next state here.
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_TRANSITIONS: dict[tuple[TurnState, str], TurnState] = {
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(TurnState.RESTORE, "ok"): TurnState.COMPACT,
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(TurnState.COMPACT, "ok"): TurnState.COMMAND,
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(TurnState.COMMAND, "dispatch"): TurnState.BUILD,
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(TurnState.COMMAND, "shortcut"): TurnState.DONE,
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(TurnState.BUILD, "ok"): TurnState.RUN,
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(TurnState.RUN, "ok"): TurnState.SAVE,
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(TurnState.SAVE, "ok"): TurnState.RESPOND,
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(TurnState.RESPOND, "ok"): TurnState.DONE,
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}
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def __init__(
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self,
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bus: MessageBus,
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provider: LLMProvider,
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workspace: Path,
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model: str | None = None,
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max_iterations: int | None = None,
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max_concurrent_subagents: int | None = None,
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context_window_tokens: int | None = None,
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context_block_limit: int | None = None,
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max_tool_result_chars: int | None = None,
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provider_retry_mode: str = "standard",
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tool_hint_max_length: int | None = None,
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cron_service: CronService | None = None,
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restrict_to_workspace: bool = False,
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session_manager: SessionManager | None = None,
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mcp_servers: dict | None = None,
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channels_config: ChannelsConfig | None = None,
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timezone: str | None = None,
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session_ttl_minutes: int = 0,
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consolidation_ratio: float = 0.5,
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max_messages: int = 120,
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hooks: list[AgentHook] | None = None,
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unified_session: bool = False,
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disabled_skills: list[str] | None = None,
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tools_config: ToolsConfig | None = None,
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image_generation_provider_config: ProviderConfig | None = None,
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image_generation_provider_configs: dict[str, ProviderConfig] | None = None,
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provider_snapshot_loader: Callable[..., ProviderSnapshot] | None = None,
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provider_signature: tuple[object, ...] | None = None,
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model_presets: dict[str, ModelPresetConfig] | None = None,
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model_preset: str | None = None,
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preset_snapshot_loader: preset_helpers.PresetSnapshotLoader | None = None,
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runtime_events: RuntimeEventBus | None = None,
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runtime_model_publisher: Callable[[str, str | None], None] | None = None,
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):
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from nanobot.config.schema import ToolsConfig
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_tc = tools_config or ToolsConfig()
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defaults = AgentDefaults()
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self.bus = bus
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self.runtime_events = runtime_events or RuntimeEventBus()
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self.runtime_event_publisher = RuntimeEventPublisher(self.runtime_events)
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self.channels_config = channels_config
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self.provider = provider
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self._provider_snapshot_loader = provider_snapshot_loader
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self._preset_snapshot_loader = preset_snapshot_loader
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self._runtime_model_publisher = runtime_model_publisher
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self._provider_signature = provider_signature
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self._default_selection_signature = preset_helpers.default_selection_signature(provider_signature)
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self.workspace = workspace
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self.model = model or provider.get_default_model()
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self.max_iterations = (
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max_iterations if max_iterations is not None else defaults.max_tool_iterations
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)
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self.context_window_tokens = (
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context_window_tokens
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if context_window_tokens is not None
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else defaults.context_window_tokens
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)
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self.context_block_limit = context_block_limit
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self.max_tool_result_chars = (
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max_tool_result_chars
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if max_tool_result_chars is not None
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else defaults.max_tool_result_chars
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)
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self.provider_retry_mode = provider_retry_mode
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self.tool_hint_max_length = (
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tool_hint_max_length if tool_hint_max_length is not None
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else defaults.tool_hint_max_length
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)
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self.tools_config = _tc
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self.web_config = _tc.web
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self.exec_config = _tc.exec
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self._image_generation_provider_configs = dict(image_generation_provider_configs or {})
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if (
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image_generation_provider_config is not None
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and "openrouter" not in self._image_generation_provider_configs
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):
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self._image_generation_provider_configs["openrouter"] = image_generation_provider_config
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self.cron_service = cron_service
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self.restrict_to_workspace = restrict_to_workspace
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self.workspace_scopes = WorkspaceScopeResolver(
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default_workspace=workspace,
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default_restrict_to_workspace=restrict_to_workspace,
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)
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self._start_time = time.time()
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self._last_usage: dict[str, int] = {}
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self._extra_hooks: list[AgentHook] = hooks or []
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self.context = ContextBuilder(workspace, timezone=timezone, disabled_skills=disabled_skills)
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self.sessions = session_manager or SessionManager(workspace)
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self.tools = ToolRegistry()
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# One file-read/write tracker per logical session. The tool registry is
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# shared by this loop, so tools resolve the active state via contextvars.
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self._file_state_store = FileStateStore()
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self.runner = AgentRunner(provider)
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self.subagents = SubagentManager(
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provider=provider,
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workspace=workspace,
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bus=bus,
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model=self.model,
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tools_config=_tc,
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max_tool_result_chars=self.max_tool_result_chars,
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restrict_to_workspace=restrict_to_workspace,
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disabled_skills=disabled_skills,
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max_iterations=self.max_iterations,
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max_concurrent_subagents=max_concurrent_subagents,
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llm_wall_timeout_for_session=lambda sk: runner_wall_llm_timeout_s(self.sessions, sk),
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)
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self._unified_session = unified_session
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self._max_messages = max_messages if max_messages > 0 else 120
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self._running = False
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self._mcp_servers = mcp_servers or {}
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self._mcp_stacks: dict[str, AsyncExitStack] = {}
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self._mcp_connected = False
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self._mcp_connecting = False
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self._active_tasks: dict[str, list[asyncio.Task]] = {} # session_key -> tasks
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self._background_tasks: list[asyncio.Task] = []
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self._session_locks: dict[str, asyncio.Lock] = {}
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# Per-session pending queues for mid-turn message injection.
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# When a session has an active task, new messages for that session
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# are routed here instead of creating a new task.
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self._pending_queues: dict[str, asyncio.Queue] = {}
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self._cron_turns = CronTurnCoordinator(
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publish_inbound=self.bus.publish_inbound,
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dispatch=self._dispatch,
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is_running=lambda: self._running,
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)
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# NANOBOT_MAX_CONCURRENT_REQUESTS: <=0 means unlimited; default 3.
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_max = int(os.environ.get("NANOBOT_MAX_CONCURRENT_REQUESTS", "3"))
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self._concurrency_gate: asyncio.Semaphore | None = (
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asyncio.Semaphore(_max) if _max > 0 else None
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)
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self.consolidator = Consolidator(
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store=self.context.memory,
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provider=provider,
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model=self.model,
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sessions=self.sessions,
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context_window_tokens=self.context_window_tokens,
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build_messages=self.context.build_messages,
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get_tool_definitions=self.tools.get_definitions,
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max_completion_tokens=provider.generation.max_tokens,
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consolidation_ratio=consolidation_ratio,
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unified_session=unified_session,
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)
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self.auto_compact = AutoCompact(
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sessions=self.sessions,
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consolidator=self.consolidator,
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session_ttl_minutes=session_ttl_minutes,
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)
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self.model_presets: dict[str, ModelPresetConfig] = model_presets or {}
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self._active_preset: str | None = None
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if model_preset:
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self.set_model_preset(model_preset, publish_update=False)
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self._register_default_tools()
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self._runtime_vars: dict[str, Any] = {}
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self._current_iteration: int = 0
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self.commands = CommandRouter()
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register_builtin_commands(self.commands)
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@classmethod
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def from_config(
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cls,
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config: Any,
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bus: MessageBus | None = None,
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**extra: Any,
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) -> AgentLoop:
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"""Create an AgentLoop from config with the common parameter set.
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Extra keyword arguments are forwarded to ``AgentLoop.__init__``,
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allowing callers to override or extend the standard config-derived
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parameters (e.g. ``cron_service``, ``session_manager``).
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"""
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from nanobot.providers.factory import make_provider
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if bus is None:
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bus = MessageBus()
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defaults = config.agents.defaults
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provider = extra.pop("provider", None) or make_provider(config)
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resolved = config.resolve_preset()
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model = extra.pop("model", None) or resolved.model
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context_window_tokens = extra.pop("context_window_tokens", None) or resolved.context_window_tokens
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provider_snapshot_loader = extra.pop("provider_snapshot_loader", None)
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preset_snapshot_loader = extra.pop("preset_snapshot_loader", None) or preset_helpers.make_preset_snapshot_loader(
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config,
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provider_snapshot_loader,
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)
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return cls(
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bus=bus,
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provider=provider,
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workspace=config.workspace_path,
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model=model,
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max_iterations=defaults.max_tool_iterations,
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max_concurrent_subagents=defaults.max_concurrent_subagents,
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context_window_tokens=context_window_tokens,
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context_block_limit=defaults.context_block_limit,
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max_tool_result_chars=defaults.max_tool_result_chars,
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provider_retry_mode=defaults.provider_retry_mode,
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tool_hint_max_length=defaults.tool_hint_max_length,
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restrict_to_workspace=config.tools.restrict_to_workspace,
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mcp_servers=config.tools.mcp_servers,
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channels_config=config.channels,
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timezone=defaults.timezone,
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unified_session=defaults.unified_session,
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disabled_skills=defaults.disabled_skills,
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session_ttl_minutes=defaults.session_ttl_minutes,
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consolidation_ratio=defaults.consolidation_ratio,
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max_messages=defaults.max_messages,
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tools_config=config.tools,
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model_presets=preset_helpers.configured_model_presets(config),
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model_preset=defaults.model_preset,
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provider_snapshot_loader=provider_snapshot_loader,
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preset_snapshot_loader=preset_snapshot_loader,
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**extra,
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)
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def _sync_subagent_runtime_limits(self) -> None:
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"""Keep subagent runtime limits aligned with mutable loop settings."""
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self.subagents.max_iterations = self.max_iterations
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def _apply_provider_snapshot(
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self,
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snapshot: ProviderSnapshot,
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*,
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publish_update: bool = True,
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model_preset: str | None = None,
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) -> None:
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"""Swap model/provider for future turns without disturbing an active one."""
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provider = snapshot.provider
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model = snapshot.model
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context_window_tokens = snapshot.context_window_tokens
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old_model = self.model
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self.provider = provider
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self.model = model
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self.context_window_tokens = context_window_tokens
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self.runner.provider = provider
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self.subagents.set_provider(provider, model)
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self.consolidator.set_provider(provider, model, context_window_tokens)
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self._provider_signature = snapshot.signature
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if publish_update and self._runtime_model_publisher is not None:
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self._runtime_model_publisher(
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self.model,
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model_preset if model_preset is not None else self.model_preset,
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)
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if publish_update:
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self._runtime_events().runtime_model_changed(
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self.model,
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model_preset if model_preset is not None else self.model_preset,
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)
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logger.info("Runtime model switched for next turn: {} -> {}", old_model, model)
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def _refresh_provider_snapshot(self) -> None:
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if self._provider_snapshot_loader is None:
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return
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try:
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snapshot = self._provider_snapshot_loader()
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except Exception:
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logger.exception("Failed to refresh provider config")
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return
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default_selection = preset_helpers.default_selection_signature(snapshot.signature)
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if self._active_preset and self._default_selection_signature in (None, default_selection):
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self._default_selection_signature = default_selection
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try:
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snapshot = self._build_model_preset_snapshot(self._active_preset)
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except Exception:
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logger.exception("Failed to refresh active model preset")
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return
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else:
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self._active_preset = None
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self._default_selection_signature = default_selection
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if snapshot.signature == self._provider_signature:
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return
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self._default_selection_signature = preset_helpers.default_selection_signature(snapshot.signature)
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self._apply_provider_snapshot(snapshot)
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@property
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def model_preset(self) -> str | None:
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|
return self._active_preset
|
|
|
|
@model_preset.setter
|
|
def model_preset(self, name: str | None) -> None:
|
|
self.set_model_preset(name)
|
|
|
|
def _build_model_preset_snapshot(self, name: str) -> ProviderSnapshot:
|
|
return preset_helpers.build_runtime_preset_snapshot(
|
|
name=name,
|
|
presets=self.model_presets,
|
|
provider=self.provider,
|
|
loader=self._preset_snapshot_loader,
|
|
)
|
|
|
|
def set_model_preset(self, name: str | None, *, publish_update: bool = True) -> None:
|
|
"""Resolve a preset by name and apply all runtime model dependents."""
|
|
name = preset_helpers.normalize_preset_name(name, self.model_presets)
|
|
snapshot = self._build_model_preset_snapshot(name)
|
|
self._apply_provider_snapshot(snapshot, publish_update=publish_update, model_preset=name)
|
|
self._active_preset = name
|
|
|
|
def _register_default_tools(self) -> None:
|
|
"""Register the default set of tools via plugin loader."""
|
|
from nanobot.agent.tools.context import ToolContext
|
|
from nanobot.agent.tools.loader import ToolLoader
|
|
|
|
ctx = ToolContext(
|
|
config=self.tools_config,
|
|
workspace=str(self.workspace),
|
|
bus=self.bus,
|
|
subagent_manager=self.subagents,
|
|
cron_service=self.cron_service,
|
|
sessions=self.sessions,
|
|
provider_snapshot_loader=self._provider_snapshot_loader,
|
|
image_generation_provider_configs=self._image_generation_provider_configs,
|
|
timezone=self.context.timezone or "UTC",
|
|
workspace_sandbox=self.workspace_scopes.sandbox_status,
|
|
runtime_events=self.runtime_events,
|
|
)
|
|
loader = ToolLoader()
|
|
registered = loader.load(ctx, self.tools)
|
|
|
|
# MyTool needs runtime state reference — manual registration
|
|
if self.tools_config.my.enable:
|
|
self.tools.register(
|
|
MyTool(runtime_state=self, modify_allowed=self.tools_config.my.allow_set)
|
|
)
|
|
registered.append("my")
|
|
|
|
logger.info("Registered {} tools: {}", len(registered), registered)
|
|
|
|
async def _connect_mcp(self) -> None:
|
|
"""Connect configured MCP servers."""
|
|
await agent_context.connect_mcp(self, self.tools)
|
|
|
|
def _set_tool_context(
|
|
self, channel: str, chat_id: str,
|
|
message_id: str | None = None, metadata: dict | None = None,
|
|
session_key: str | None = None,
|
|
) -> None:
|
|
"""Update context for all tools that need routing info."""
|
|
from nanobot.agent.tools.context import ContextAware
|
|
|
|
effective_key = session_key or session_key_for_channel(
|
|
channel,
|
|
chat_id,
|
|
unified_session=self._unified_session,
|
|
)
|
|
request_ctx = RequestContext(
|
|
channel=channel,
|
|
chat_id=chat_id,
|
|
message_id=message_id,
|
|
session_key=effective_key,
|
|
metadata=dict(metadata or {}),
|
|
)
|
|
|
|
for name in self.tools.tool_names:
|
|
tool = self.tools.get(name)
|
|
if tool and isinstance(tool, ContextAware):
|
|
tool.set_context(request_ctx)
|
|
|
|
@staticmethod
|
|
def _runtime_chat_id(msg: InboundMessage) -> str:
|
|
"""Return the chat id shown in runtime metadata for the model."""
|
|
return str(msg.metadata.get("context_chat_id") or msg.chat_id)
|
|
|
|
async def _build_bus_progress_callback(
|
|
self, msg: InboundMessage
|
|
) -> Callable[..., Awaitable[None]]:
|
|
"""Build a progress callback that publishes to the message bus."""
|
|
return build_bus_progress_callback(self.bus, msg)
|
|
|
|
async def _build_retry_wait_callback(
|
|
self, msg: InboundMessage
|
|
) -> Callable[[str], Awaitable[None]]:
|
|
"""Build a retry-wait callback that publishes to the message bus."""
|
|
|
|
async def _on_retry_wait(content: str) -> None:
|
|
meta = dict(msg.metadata or {})
|
|
meta["_retry_wait"] = True
|
|
await self.bus.publish_outbound(
|
|
OutboundMessage(
|
|
channel=msg.channel,
|
|
chat_id=msg.chat_id,
|
|
content=content,
|
|
metadata=meta,
|
|
)
|
|
)
|
|
|
|
return _on_retry_wait
|
|
|
|
def _runtime_events(self) -> RuntimeEventPublisher:
|
|
return ensure_runtime_event_publisher(self)
|
|
|
|
async def submit_cron_turn(self, msg: InboundMessage) -> OutboundMessage | None:
|
|
return await self._cron_turns.submit(msg)
|
|
|
|
def pending_cron_job_ids_for_session(self, session_key: str) -> set[str]:
|
|
return self._cron_turns.pending_job_ids_for_session(session_key)
|
|
|
|
def _persist_user_message_early(
|
|
self,
|
|
msg: InboundMessage,
|
|
session: Session,
|
|
**kwargs: Any,
|
|
) -> bool:
|
|
"""Persist the triggering user message before the turn starts.
|
|
|
|
Returns True if the message was persisted.
|
|
"""
|
|
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()
|
|
if has_text or media_paths:
|
|
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_override, cron_extra = cron_history_overrides(msg.metadata)
|
|
if text_override is not None:
|
|
text = text_override
|
|
extra.update(cron_extra)
|
|
session.add_message("user", text, **extra)
|
|
self._mark_pending_user_turn(session)
|
|
self.sessions.save(session)
|
|
return True
|
|
return False
|
|
|
|
def _build_initial_messages(
|
|
self,
|
|
msg: InboundMessage,
|
|
session: Session,
|
|
history: list[dict[str, Any]],
|
|
pending_summary: str | None,
|
|
include_memory_recent_history: bool = True,
|
|
) -> list[dict[str, Any]]:
|
|
"""Build the initial message list for the LLM turn."""
|
|
scope = self.workspace_scopes.for_message(msg, session.metadata)
|
|
return self.context.build_messages(
|
|
history=history,
|
|
current_message=image_generation_prompt(msg.content, msg.metadata),
|
|
media=msg.media if msg.media else None,
|
|
channel=msg.channel,
|
|
chat_id=self._runtime_chat_id(msg),
|
|
sender_id=msg.sender_id,
|
|
session_summary=pending_summary,
|
|
session_metadata=session.metadata,
|
|
workspace=scope.project_path,
|
|
runtime_state=self,
|
|
inbound_message=msg,
|
|
include_memory_recent_history=include_memory_recent_history,
|
|
session_key=session.key,
|
|
unified_session=self._unified_session,
|
|
)
|
|
|
|
async def _dispatch_command_inline(
|
|
self,
|
|
msg: InboundMessage,
|
|
key: str,
|
|
raw: str,
|
|
dispatch_fn: Callable[[CommandContext], Awaitable[OutboundMessage | None]],
|
|
) -> None:
|
|
"""Dispatch a command directly from the run() loop and publish the result."""
|
|
ctx = CommandContext(msg=msg, session=None, key=key, raw=raw, loop=self)
|
|
result = await dispatch_fn(ctx)
|
|
if result:
|
|
await self.bus.publish_outbound(result)
|
|
else:
|
|
logger.warning("Command '{}' matched but dispatch returned None", raw)
|
|
|
|
async def _cancel_active_tasks(self, key: str) -> int:
|
|
"""Cancel and await all active tasks and subagents for *key*.
|
|
|
|
Returns the total number of cancelled tasks + subagents.
|
|
"""
|
|
tasks = self._active_tasks.pop(key, [])
|
|
cancelled = sum(1 for t in tasks if not t.done() and t.cancel())
|
|
for t in tasks:
|
|
with suppress(asyncio.CancelledError, Exception):
|
|
await t
|
|
sub_cancelled = await self.subagents.cancel_by_session(key)
|
|
return cancelled + sub_cancelled
|
|
|
|
def _effective_session_key(self, msg: InboundMessage) -> str:
|
|
"""Return the session key used for task routing and mid-turn injections."""
|
|
if self._unified_session and not msg.session_key_override:
|
|
return UNIFIED_SESSION_KEY
|
|
return msg.session_key
|
|
|
|
def _replay_token_budget(self) -> int:
|
|
"""Derive a token budget for session history replay from the context window."""
|
|
if self.context_window_tokens <= 0:
|
|
return 0
|
|
max_output = getattr(getattr(self.provider, "generation", None), "max_tokens", 4096)
|
|
try:
|
|
reserved_output = int(max_output)
|
|
except (TypeError, ValueError):
|
|
reserved_output = 4096
|
|
budget = self.context_window_tokens - max(1, reserved_output) - 1024
|
|
return budget if budget > 0 else max(128, self.context_window_tokens // 2)
|
|
|
|
async def _run_agent_loop(
|
|
self,
|
|
initial_messages: list[dict],
|
|
on_progress: Callable[..., Awaitable[None]] | None = None,
|
|
on_stream: Callable[[str], Awaitable[None]] | None = None,
|
|
on_stream_end: Callable[..., Awaitable[None]] | None = None,
|
|
on_retry_wait: Callable[[str], Awaitable[None]] | None = None,
|
|
*,
|
|
session: Session | None = None,
|
|
channel: str = "cli",
|
|
chat_id: str = "direct",
|
|
message_id: str | None = None,
|
|
metadata: dict[str, Any] | None = None,
|
|
session_key: str | None = None,
|
|
pending_queue: asyncio.Queue | None = None,
|
|
ephemeral: bool = False,
|
|
tools: ToolRegistry | None = None,
|
|
) -> tuple[str | None, list[str], list[dict], str, bool]:
|
|
"""Run the agent iteration loop.
|
|
|
|
*on_stream*: called with each content delta during streaming.
|
|
*on_stream_end(resuming)*: called when a streaming session finishes.
|
|
``resuming=True`` means tool calls follow (spinner should restart);
|
|
``resuming=False`` means this is the final response.
|
|
|
|
Returns (final_content, tools_used, messages, stop_reason, had_injections).
|
|
"""
|
|
self._sync_subagent_runtime_limits()
|
|
|
|
loop_hook = AgentProgressHook(
|
|
on_progress=on_progress,
|
|
on_stream=on_stream,
|
|
on_stream_end=on_stream_end,
|
|
channel=channel,
|
|
chat_id=chat_id,
|
|
message_id=message_id,
|
|
metadata=metadata,
|
|
session_key=session_key,
|
|
tool_hint_max_length=self.tool_hint_max_length,
|
|
set_tool_context=self._set_tool_context,
|
|
on_iteration=lambda iteration: setattr(self, "_current_iteration", iteration),
|
|
)
|
|
hook: AgentHook = loop_hook
|
|
if not ephemeral and self._extra_hooks:
|
|
hook = CompositeHook([loop_hook] + self._extra_hooks)
|
|
|
|
async def _checkpoint(payload: dict[str, Any]) -> None:
|
|
if session is None:
|
|
return
|
|
self._set_runtime_checkpoint(session, payload)
|
|
|
|
async def _drain_pending(*, limit: int = _MAX_INJECTIONS_PER_TURN) -> list[dict[str, Any]]:
|
|
"""Drain follow-up messages from the pending queue.
|
|
|
|
When no messages are immediately available but sub-agents
|
|
spawned in this dispatch are still running, blocks until at
|
|
least one result arrives (or timeout). This keeps the runner
|
|
loop alive so subsequent sub-agent completions are consumed
|
|
in-order rather than dispatched separately.
|
|
"""
|
|
if pending_queue is None:
|
|
return []
|
|
|
|
def _to_user_message(pending_msg: InboundMessage) -> dict[str, Any]:
|
|
content = pending_msg.content
|
|
media = pending_msg.media if pending_msg.media else None
|
|
if media:
|
|
content, media = self._prepare_message_media(content, media)
|
|
media = media or None
|
|
user_content = self.context._build_user_content(content, media)
|
|
return {"role": "user", "content": user_content}
|
|
|
|
items: list[dict[str, Any]] = []
|
|
while len(items) < limit:
|
|
try:
|
|
items.append(_to_user_message(pending_queue.get_nowait()))
|
|
except asyncio.QueueEmpty:
|
|
break
|
|
|
|
# Block if nothing drained but sub-agents spawned in this dispatch
|
|
# are still running. Keeps the runner loop alive so subsequent
|
|
# completions are injected in-order rather than dispatched separately.
|
|
if (not items
|
|
and session is not None
|
|
and self.subagents.get_running_count_by_session(session.key) > 0):
|
|
try:
|
|
msg = await asyncio.wait_for(pending_queue.get(), timeout=300)
|
|
except asyncio.TimeoutError:
|
|
logger.warning(
|
|
"Timeout waiting for sub-agent completion in session {}",
|
|
session.key,
|
|
)
|
|
return items
|
|
items.append(_to_user_message(msg))
|
|
while len(items) < limit:
|
|
try:
|
|
items.append(_to_user_message(pending_queue.get_nowait()))
|
|
except asyncio.QueueEmpty:
|
|
break
|
|
|
|
return items
|
|
|
|
active_session_key = session.key if session else session_key
|
|
effective_scope = self.workspace_scopes.for_turn(
|
|
channel=channel,
|
|
message_metadata=metadata,
|
|
session_metadata=session.metadata if session is not None else None,
|
|
)
|
|
request_ctx = RequestContext(
|
|
channel=channel,
|
|
chat_id=chat_id,
|
|
message_id=message_id,
|
|
session_key=active_session_key,
|
|
metadata=dict(metadata or {}),
|
|
)
|
|
file_state_token = bind_file_states(self._file_state_store.for_session(active_session_key))
|
|
request_token = bind_request_context(request_ctx)
|
|
workspace_token = bind_workspace_scope(effective_scope)
|
|
# Build continuation message that embeds the active goal objective so
|
|
# the LLM can see it even if earlier Runtime Context was truncated.
|
|
_goal_lines = goal_state_runtime_lines(session.metadata if session is not None else None)
|
|
_goal_continue = (
|
|
"You have an active sustained goal:\n\n"
|
|
+ "\n".join(_goal_lines)
|
|
+ "\n\nPlease continue working toward the objective using your tools, "
|
|
"or call complete_goal if the work is truly finished."
|
|
) if _goal_lines else SUSTAINED_GOAL_CONTINUE_PROMPT
|
|
session_metadata = session.metadata if session is not None else None
|
|
try:
|
|
result = await self.runner.run(AgentRunSpec(
|
|
initial_messages=initial_messages,
|
|
tools=tools or self.tools,
|
|
model=self.model,
|
|
max_iterations=self.max_iterations,
|
|
max_tool_result_chars=self.max_tool_result_chars,
|
|
hook=hook,
|
|
error_message="Sorry, I encountered an error calling the AI model.",
|
|
concurrent_tools=True,
|
|
workspace=effective_scope.project_path,
|
|
session_key=session.key if session else None,
|
|
context_window_tokens=self.context_window_tokens,
|
|
context_block_limit=self.context_block_limit,
|
|
provider_retry_mode=self.provider_retry_mode,
|
|
progress_callback=on_progress,
|
|
stream_progress_deltas=on_stream is not None,
|
|
retry_wait_callback=on_retry_wait,
|
|
checkpoint_callback=_checkpoint,
|
|
injection_callback=_drain_pending,
|
|
# Sustained goals may legitimately exceed NANOBOT_LLM_TIMEOUT_S; idle stall
|
|
# is still capped by NANOBOT_STREAM_IDLE_TIMEOUT_S in streaming providers.
|
|
llm_timeout_s=runner_wall_llm_timeout_s(
|
|
self.sessions,
|
|
session.key if session is not None else session_key,
|
|
metadata=session_metadata,
|
|
message_metadata=metadata,
|
|
),
|
|
goal_active_predicate=lambda: sustained_goal_active(session.metadata) if session is not None else False,
|
|
goal_continue_message=_goal_continue,
|
|
finalize_on_max_iterations=turn_continuation.should_finalize_on_max_iterations(
|
|
pending_queue_available=pending_queue is not None and session is not None,
|
|
session_metadata=session_metadata,
|
|
message_metadata=metadata,
|
|
),
|
|
))
|
|
finally:
|
|
reset_workspace_scope(workspace_token)
|
|
reset_request_context(request_token)
|
|
reset_file_states(file_state_token)
|
|
self._last_usage = result.usage
|
|
if result.stop_reason == "max_iterations":
|
|
logger.warning("Max iterations ({}) reached", self.max_iterations)
|
|
should_stream = turn_continuation.should_stream_budget_response(
|
|
stop_reason=result.stop_reason,
|
|
pending_queue_available=pending_queue is not None and session is not None,
|
|
session_metadata=session_metadata,
|
|
message_metadata=metadata,
|
|
)
|
|
# Push final content through stream so streaming channels (e.g. Feishu)
|
|
# update the card instead of leaving it empty.
|
|
if on_stream and on_stream_end and should_stream:
|
|
await on_stream(result.final_content or "")
|
|
await on_stream_end(resuming=False)
|
|
elif result.stop_reason == "error":
|
|
logger.error("LLM returned error: {}", (result.final_content or "")[:200])
|
|
return result.final_content, result.tools_used, result.messages, result.stop_reason, result.had_injections
|
|
|
|
async def run(self) -> None:
|
|
"""Run the agent loop, dispatching messages as tasks to stay responsive to /stop."""
|
|
self._running = True
|
|
await self._connect_mcp()
|
|
logger.info("Agent loop started")
|
|
|
|
while self._running:
|
|
try:
|
|
msg = await asyncio.wait_for(self.bus.consume_inbound(), timeout=1.0)
|
|
except asyncio.TimeoutError:
|
|
self.auto_compact.check_expired(
|
|
self._schedule_background,
|
|
active_session_keys=self._pending_queues.keys(),
|
|
)
|
|
continue
|
|
except asyncio.CancelledError:
|
|
# Preserve real task cancellation so shutdown can complete cleanly.
|
|
# Only ignore non-task CancelledError signals that may leak from integrations.
|
|
if not self._running or asyncio.current_task().cancelling():
|
|
raise
|
|
continue
|
|
except Exception as e:
|
|
logger.warning("Error consuming inbound message: {}, continuing...", e)
|
|
continue
|
|
|
|
raw = msg.content.strip()
|
|
effective_key = self._effective_session_key(msg)
|
|
if await agent_context.handle_runtime_control(self, msg, self.tools):
|
|
continue
|
|
if self.commands.is_priority(raw):
|
|
await self._dispatch_command_inline(
|
|
msg, effective_key, raw,
|
|
self.commands.dispatch_priority,
|
|
)
|
|
continue
|
|
if self._cron_turns.defer_if_active(
|
|
msg,
|
|
session_key=effective_key,
|
|
active_session_keys=self._pending_queues.keys(),
|
|
):
|
|
logger.info(
|
|
"Deferred cron turn for active session {}",
|
|
effective_key,
|
|
)
|
|
continue
|
|
# If this session already has an active pending queue (i.e. a task
|
|
# is processing this session), route the message there for mid-turn
|
|
# injection instead of creating a competing task.
|
|
if effective_key in self._pending_queues:
|
|
# Non-priority commands must not be queued for injection;
|
|
# dispatch them directly (same pattern as priority commands).
|
|
if self.commands.is_dispatchable_command(raw):
|
|
await self._dispatch_command_inline(
|
|
msg, effective_key, raw,
|
|
self.commands.dispatch,
|
|
)
|
|
continue
|
|
pending_msg = msg
|
|
if effective_key != msg.session_key:
|
|
pending_msg = dataclasses.replace(
|
|
msg,
|
|
session_key_override=effective_key,
|
|
)
|
|
try:
|
|
self._pending_queues[effective_key].put_nowait(pending_msg)
|
|
except asyncio.QueueFull:
|
|
logger.warning(
|
|
"Pending queue full for session {}, falling back to queued task",
|
|
effective_key,
|
|
)
|
|
else:
|
|
logger.info(
|
|
"Routed follow-up message to pending queue for session {}",
|
|
effective_key,
|
|
)
|
|
continue
|
|
# Compute the effective session key before dispatching
|
|
# This ensures /stop command can find tasks correctly when unified session is enabled
|
|
task = asyncio.create_task(self._dispatch(msg))
|
|
self._active_tasks.setdefault(effective_key, []).append(task)
|
|
task.add_done_callback(
|
|
lambda t, k=effective_key: self._active_tasks.get(k, [])
|
|
and self._active_tasks[k].remove(t)
|
|
if t in self._active_tasks.get(k, [])
|
|
else None
|
|
)
|
|
|
|
async def _dispatch(self, msg: InboundMessage) -> None:
|
|
"""Process a message: per-session serial, cross-session concurrent."""
|
|
session_key = self._effective_session_key(msg)
|
|
if session_key != msg.session_key:
|
|
msg = dataclasses.replace(msg, session_key_override=session_key)
|
|
lock = self._session_locks.setdefault(session_key, asyncio.Lock())
|
|
gate = self._concurrency_gate or nullcontext()
|
|
|
|
pending: asyncio.Queue | None = None
|
|
try:
|
|
async with lock, gate:
|
|
# Only the task that owns the session lock may publish the
|
|
# active mid-turn injection queue for this session.
|
|
pending = asyncio.Queue(maxsize=20)
|
|
self._pending_queues[session_key] = pending
|
|
try:
|
|
on_stream = on_stream_end = None
|
|
if msg.metadata.get("_wants_stream"):
|
|
# Split one answer into distinct stream segments.
|
|
stream_base_id = f"{msg.session_key}:{time.time_ns()}"
|
|
stream_segment = 0
|
|
|
|
def _current_stream_id() -> str:
|
|
return f"{stream_base_id}:{stream_segment}"
|
|
|
|
async def on_stream(delta: str) -> None:
|
|
meta = dict(msg.metadata or {})
|
|
meta["_stream_delta"] = True
|
|
meta["_stream_id"] = _current_stream_id()
|
|
await self.bus.publish_outbound(OutboundMessage(
|
|
channel=msg.channel, chat_id=msg.chat_id,
|
|
content=delta,
|
|
metadata=meta,
|
|
))
|
|
|
|
async def on_stream_end(*, resuming: bool = False) -> None:
|
|
nonlocal stream_segment
|
|
meta = dict(msg.metadata or {})
|
|
meta["_stream_end"] = True
|
|
meta["_resuming"] = resuming
|
|
meta["_stream_id"] = _current_stream_id()
|
|
await self.bus.publish_outbound(OutboundMessage(
|
|
channel=msg.channel, chat_id=msg.chat_id,
|
|
content="",
|
|
metadata=meta,
|
|
))
|
|
stream_segment += 1
|
|
|
|
response = await self._process_message(
|
|
msg, on_stream=on_stream, on_stream_end=on_stream_end,
|
|
pending_queue=pending,
|
|
)
|
|
completed_channel = msg.channel
|
|
completed_chat_id = msg.chat_id
|
|
if response is not None:
|
|
await self.bus.publish_outbound(response)
|
|
completed_channel = response.channel
|
|
completed_chat_id = response.chat_id
|
|
elif msg.channel == "cli":
|
|
await self.bus.publish_outbound(OutboundMessage(
|
|
channel=msg.channel, chat_id=msg.chat_id,
|
|
content="", metadata=msg.metadata or {},
|
|
))
|
|
continuing = turn_continuation.internal_continuation_pending(msg.metadata)
|
|
if not continuing:
|
|
await self._runtime_events().turn_completed(
|
|
channel=completed_channel,
|
|
chat_id=completed_chat_id,
|
|
session_key=session_key,
|
|
metadata=msg.metadata,
|
|
)
|
|
self._cron_turns.complete(msg, response=response)
|
|
except asyncio.CancelledError:
|
|
self._cron_turns.complete(
|
|
msg,
|
|
error=asyncio.CancelledError(),
|
|
)
|
|
logger.info("Task cancelled for session {}", session_key)
|
|
# Preserve partial context from the interrupted turn so
|
|
# the user does not lose tool results and assistant
|
|
# messages accumulated before /stop. The checkpoint was
|
|
# already persisted to session metadata by
|
|
# _emit_checkpoint during tool execution; materializing
|
|
# it into session history now makes it visible in the
|
|
# next conversation turn.
|
|
try:
|
|
key = self._effective_session_key(msg)
|
|
session = self.sessions.get_or_create(key)
|
|
if self._restore_runtime_checkpoint(session):
|
|
self._clear_pending_user_turn(session)
|
|
self.sessions.save(session)
|
|
logger.info(
|
|
"Restored partial context for cancelled session {}",
|
|
key,
|
|
)
|
|
except Exception:
|
|
logger.debug(
|
|
"Could not restore checkpoint for cancelled session {}",
|
|
session_key,
|
|
exc_info=True,
|
|
)
|
|
raise
|
|
except Exception as exc:
|
|
logger.exception("Error processing message for session {}", session_key)
|
|
await self.bus.publish_outbound(OutboundMessage(
|
|
channel=msg.channel, chat_id=msg.chat_id,
|
|
content="Sorry, I encountered an error.",
|
|
))
|
|
if not turn_continuation.internal_continuation_pending(msg.metadata):
|
|
await self._runtime_events().turn_completed(
|
|
channel=msg.channel,
|
|
chat_id=msg.chat_id,
|
|
session_key=session_key,
|
|
metadata=msg.metadata,
|
|
)
|
|
self._cron_turns.complete(msg, error=exc)
|
|
finally:
|
|
# Drain any messages still in the pending queue and re-publish
|
|
# them to the bus so they are processed as fresh inbound messages
|
|
# rather than silently lost. Only remove our own queue; a
|
|
# later task waiting on the lock must not be able to steal
|
|
# cleanup ownership.
|
|
queue = None
|
|
if self._pending_queues.get(session_key) is pending:
|
|
queue = self._pending_queues.pop(session_key, None)
|
|
else:
|
|
queue = pending
|
|
if queue is not None:
|
|
leftover = 0
|
|
while True:
|
|
try:
|
|
item = queue.get_nowait()
|
|
except asyncio.QueueEmpty:
|
|
break
|
|
await self.bus.publish_inbound(item)
|
|
leftover += 1
|
|
if leftover:
|
|
logger.info(
|
|
"Re-published {} leftover message(s) to bus for session {}",
|
|
leftover, session_key,
|
|
)
|
|
if not turn_continuation.internal_continuation_pending(msg.metadata):
|
|
await self._runtime_events().run_status_changed(
|
|
msg, session_key, "idle"
|
|
)
|
|
self._runtime_events().clear_turn(session_key)
|
|
await self._cron_turns.publish_next_deferred(session_key)
|
|
finally:
|
|
if pending is None:
|
|
await self._runtime_events().run_status_changed(
|
|
msg, session_key, "idle"
|
|
)
|
|
self._runtime_events().clear_turn(session_key)
|
|
await self._cron_turns.publish_next_deferred(session_key)
|
|
|
|
async def close_mcp(self) -> None:
|
|
"""Drain pending background archives, then close MCP connections."""
|
|
if self._background_tasks:
|
|
await asyncio.gather(*self._background_tasks, return_exceptions=True)
|
|
self._background_tasks.clear()
|
|
for name, stack in self._mcp_stacks.items():
|
|
try:
|
|
await stack.aclose()
|
|
except (RuntimeError, BaseExceptionGroup):
|
|
logger.debug("MCP server '{}' cleanup error (can be ignored)", name)
|
|
self._mcp_stacks.clear()
|
|
|
|
def _schedule_background(self, coro) -> None:
|
|
"""Schedule a coroutine as a tracked background task (drained on shutdown)."""
|
|
task = asyncio.create_task(coro)
|
|
self._background_tasks.append(task)
|
|
task.add_done_callback(self._background_tasks.remove)
|
|
|
|
def stop(self) -> None:
|
|
"""Stop the agent loop."""
|
|
self._running = False
|
|
logger.info("Agent loop stopping")
|
|
|
|
async def _process_system_message(
|
|
self,
|
|
msg: InboundMessage,
|
|
session_key: str | None = None,
|
|
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,
|
|
) -> OutboundMessage | None:
|
|
"""Process a system inbound message (e.g. subagent announce)."""
|
|
channel, chat_id = (
|
|
msg.chat_id.split(":", 1) if ":" in msg.chat_id else ("cli", msg.chat_id)
|
|
)
|
|
logger.info("Processing system message from {}", msg.sender_id)
|
|
key = msg.session_key_override or f"{channel}:{chat_id}"
|
|
session = self.sessions.get_or_create(key)
|
|
if self._restore_runtime_checkpoint(session):
|
|
self.sessions.save(session)
|
|
if self._restore_pending_user_turn(session):
|
|
self.sessions.save(session)
|
|
|
|
session, pending = self.auto_compact.prepare_session(session, key)
|
|
if pending:
|
|
logger.info("Memory compact triggered for session {}", key)
|
|
|
|
await self.consolidator.maybe_consolidate_by_tokens(
|
|
session,
|
|
replay_max_messages=self._max_messages,
|
|
)
|
|
is_subagent = msg.sender_id == "subagent"
|
|
if is_subagent and self._persist_subagent_followup(session, msg):
|
|
logger.debug("Subagent result persisted for session {}", key)
|
|
self.sessions.save(session)
|
|
self._set_tool_context(
|
|
channel, chat_id, msg.metadata.get("message_id"),
|
|
msg.metadata, session_key=key,
|
|
)
|
|
_hist_kwargs: dict[str, Any] = {
|
|
"max_messages": self._max_messages,
|
|
"max_tokens": self._replay_token_budget(),
|
|
"include_timestamps": True,
|
|
}
|
|
history = session.get_history(**_hist_kwargs)
|
|
current_role = "assistant" if is_subagent else "user"
|
|
workspace_scope = self.workspace_scopes.for_message(msg, session.metadata)
|
|
|
|
messages = self.context.build_messages(
|
|
history=history,
|
|
current_message="" if is_subagent else msg.content,
|
|
channel=channel,
|
|
chat_id=chat_id,
|
|
current_role=current_role,
|
|
sender_id=msg.sender_id,
|
|
session_summary=pending,
|
|
session_metadata=session.metadata,
|
|
workspace=workspace_scope.project_path,
|
|
runtime_state=self,
|
|
inbound_message=msg,
|
|
skip_runtime_lines=is_subagent,
|
|
session_key=key,
|
|
unified_session=self._unified_session,
|
|
)
|
|
t_wall = time.time()
|
|
final_content, _, all_msgs, stop_reason, _ = await self._run_agent_loop(
|
|
messages, session=session, channel=channel, chat_id=chat_id,
|
|
message_id=msg.metadata.get("message_id"),
|
|
metadata=msg.metadata,
|
|
session_key=key,
|
|
pending_queue=pending_queue,
|
|
)
|
|
wall_done = time.time()
|
|
latency_ms = max(0, int((wall_done - t_wall) * 1000))
|
|
self._save_turn(session, all_msgs, 1 + len(history), turn_latency_ms=latency_ms)
|
|
self._runtime_events().record_turn_latency(key, latency_ms)
|
|
session.enforce_file_cap(
|
|
on_archive=partial(self.context.memory.raw_archive, session_key=key)
|
|
)
|
|
self._clear_runtime_checkpoint(session)
|
|
self.sessions.save(session)
|
|
self._schedule_background(
|
|
self.consolidator.maybe_consolidate_by_tokens(
|
|
session,
|
|
replay_max_messages=self._max_messages,
|
|
)
|
|
)
|
|
content = final_content or "Background task completed."
|
|
outbound_metadata: dict[str, Any] = {}
|
|
if channel == "slack" and key.startswith("slack:") and key.count(":") >= 2:
|
|
outbound_metadata["slack"] = {"thread_ts": key.split(":", 2)[2]}
|
|
if origin_message_id := msg.metadata.get("origin_message_id"):
|
|
outbound_metadata["origin_message_id"] = origin_message_id
|
|
return OutboundMessage(
|
|
channel=channel,
|
|
chat_id=chat_id,
|
|
content=content,
|
|
metadata=outbound_metadata,
|
|
)
|
|
|
|
async def _process_message(
|
|
self,
|
|
msg: InboundMessage,
|
|
session_key: str | None = None,
|
|
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,
|
|
ephemeral: bool = False,
|
|
tools: ToolRegistry | None = None,
|
|
) -> OutboundMessage | None:
|
|
"""Process a single inbound message and return the response."""
|
|
self._refresh_provider_snapshot()
|
|
|
|
if msg.channel == "system":
|
|
return await self._process_system_message(
|
|
msg,
|
|
session_key=session_key,
|
|
on_progress=on_progress,
|
|
on_stream=on_stream,
|
|
on_stream_end=on_stream_end,
|
|
pending_queue=pending_queue,
|
|
)
|
|
|
|
key = session_key or msg.session_key
|
|
t0 = time.time()
|
|
ctx = TurnContext(
|
|
msg=msg,
|
|
session=None,
|
|
session_key=key,
|
|
state=TurnState.RESTORE,
|
|
turn_id=f"{key}:{time.time_ns()}",
|
|
turn_wall_started_at=t0,
|
|
visible_run_started_at=turn_continuation.internal_continuation_run_started_at(
|
|
msg.metadata,
|
|
),
|
|
on_progress=on_progress,
|
|
on_stream=on_stream,
|
|
on_stream_end=on_stream_end,
|
|
pending_queue=pending_queue,
|
|
ephemeral=ephemeral,
|
|
tools=tools,
|
|
)
|
|
|
|
while ctx.state is not TurnState.DONE:
|
|
handler_name = f"_state_{ctx.state.name.lower()}"
|
|
handler = getattr(self, handler_name, None)
|
|
if handler is None:
|
|
raise RuntimeError(f"Missing state handler for {ctx.state}")
|
|
|
|
t0 = time.perf_counter()
|
|
try:
|
|
event = await handler(ctx)
|
|
except Exception:
|
|
duration = (time.perf_counter() - t0) * 1000
|
|
ctx.trace.append(
|
|
StateTraceEntry(
|
|
state=ctx.state,
|
|
started_at=t0,
|
|
duration_ms=duration,
|
|
event="",
|
|
error="exception",
|
|
)
|
|
)
|
|
raise
|
|
|
|
duration = (time.perf_counter() - t0) * 1000
|
|
ctx.trace.append(
|
|
StateTraceEntry(
|
|
state=ctx.state,
|
|
started_at=t0,
|
|
duration_ms=duration,
|
|
event=event,
|
|
)
|
|
)
|
|
logger.debug(
|
|
"[turn {}] State {} took {:.1f}ms -> event {}",
|
|
ctx.turn_id,
|
|
ctx.state.name,
|
|
duration,
|
|
event,
|
|
)
|
|
|
|
next_state = self._TRANSITIONS.get((ctx.state, event))
|
|
if next_state is None:
|
|
raise RuntimeError(
|
|
f"[turn {ctx.turn_id}] No transition from {ctx.state} "
|
|
f"on event {event!r}"
|
|
)
|
|
ctx.state = next_state
|
|
|
|
logger.debug(
|
|
"[turn {}] Turn completed after {} states",
|
|
ctx.turn_id,
|
|
len(ctx.trace),
|
|
)
|
|
return ctx.outbound
|
|
|
|
def _assemble_outbound(
|
|
self,
|
|
msg: InboundMessage,
|
|
final_content: str,
|
|
all_msgs: list[dict[str, Any]],
|
|
stop_reason: str,
|
|
had_injections: bool,
|
|
on_stream: Callable[[str], Awaitable[None]] | None,
|
|
*,
|
|
turn_latency_ms: int | None = None,
|
|
) -> OutboundMessage | None:
|
|
"""Assemble the final outbound message from turn results."""
|
|
# MessageTool suppression
|
|
if (mt := self.tools.get("message")) and isinstance(mt, MessageTool) and mt._sent_in_turn:
|
|
if not had_injections or stop_reason == "empty_final_response":
|
|
return None
|
|
|
|
preview = final_content[:120] + "..." if len(final_content) > 120 else final_content
|
|
logger.info("Response to {}:{}: {}", msg.channel, msg.sender_id, preview)
|
|
|
|
meta = dict(msg.metadata or {})
|
|
if on_stream is not None and stop_reason not in {"error", "tool_error"}:
|
|
meta["_streamed"] = True
|
|
if turn_latency_ms is not None:
|
|
meta["latency_ms"] = int(turn_latency_ms)
|
|
|
|
return OutboundMessage(
|
|
channel=msg.channel,
|
|
chat_id=msg.chat_id,
|
|
content=final_content,
|
|
metadata=meta,
|
|
)
|
|
|
|
async def _state_restore(self, ctx: TurnContext) -> TurnState:
|
|
"""Restore checkpoint / pending user turn; extract documents."""
|
|
msg = ctx.msg
|
|
|
|
if msg.media:
|
|
new_content, image_only = self._prepare_message_media(msg.content, msg.media)
|
|
ctx.msg = dataclasses.replace(msg, content=new_content, media=image_only)
|
|
msg = ctx.msg
|
|
|
|
preview = msg.content[:80] + "..." if len(msg.content) > 80 else msg.content
|
|
logger.info("Processing message from {}:{}: {}", msg.channel, msg.sender_id, preview)
|
|
|
|
# Session is already fetched by the caller (_process_message) but
|
|
# 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)
|
|
await self._runtime_events().session_turn_started(msg, ctx.session_key)
|
|
self.workspace_scopes.persist_message_scope(ctx.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)
|
|
|
|
return "ok"
|
|
|
|
def _prepare_message_media(self, content: str, media: list[str]) -> tuple[str, list[str]]:
|
|
if self._should_extract_document_text():
|
|
return extract_documents(content, media)
|
|
return reference_non_image_attachments(content, media)
|
|
|
|
def _should_extract_document_text(self) -> bool:
|
|
if self.channels_config is None:
|
|
return True
|
|
return self.channels_config.extract_document_text
|
|
|
|
async def _state_compact(self, ctx: TurnContext) -> str:
|
|
ctx.session, pending = self.auto_compact.prepare_session(ctx.session, ctx.session_key)
|
|
ctx.pending_summary = pending
|
|
return "ok"
|
|
|
|
async def _state_command(self, ctx: TurnContext) -> str:
|
|
raw = ctx.msg.content.strip()
|
|
cmd_ctx = CommandContext(
|
|
msg=ctx.msg, session=ctx.session, key=ctx.session_key, raw=raw, loop=self
|
|
)
|
|
result = await self.commands.dispatch(cmd_ctx)
|
|
if result is not None:
|
|
ctx.outbound = result
|
|
# Shortcut commands skip BUILD and SAVE, so we must persist the
|
|
# turn here so WebUI history hydration after _turn_end sees the
|
|
# message. Mark messages with _command so get_history can filter
|
|
# them out of LLM context. /new is excluded because it
|
|
# intentionally clears the session.
|
|
if raw.lower() != "/new":
|
|
ctx.user_persisted_early = self._persist_user_message_early(
|
|
ctx.msg, ctx.session, _command=True
|
|
)
|
|
ctx.session.add_message(
|
|
"assistant", result.content, _command=True
|
|
)
|
|
self.sessions.save(ctx.session)
|
|
self._clear_pending_user_turn(ctx.session)
|
|
return "shortcut"
|
|
return "dispatch"
|
|
|
|
async def _state_build(self, ctx: TurnContext) -> str:
|
|
if not ctx.ephemeral:
|
|
await self.consolidator.maybe_consolidate_by_tokens(
|
|
ctx.session,
|
|
replay_max_messages=self._max_messages,
|
|
)
|
|
self._set_tool_context(
|
|
ctx.msg.channel,
|
|
ctx.msg.chat_id,
|
|
ctx.msg.metadata.get("message_id"),
|
|
ctx.msg.metadata,
|
|
session_key=ctx.session_key,
|
|
)
|
|
if message_tool := self.tools.get("message"):
|
|
if isinstance(message_tool, MessageTool):
|
|
message_tool.start_turn()
|
|
|
|
_hist_kwargs: dict[str, Any] = {
|
|
"max_messages": self._max_messages,
|
|
"max_tokens": self._replay_token_budget(),
|
|
"include_timestamps": True,
|
|
}
|
|
ctx.history = ctx.session.get_history(**_hist_kwargs)
|
|
self._runtime_events().record_turn_runtime(
|
|
ctx.session_key,
|
|
self.llm_runtime(),
|
|
)
|
|
|
|
ctx.initial_messages = self._build_initial_messages(
|
|
ctx.msg,
|
|
ctx.session,
|
|
ctx.history,
|
|
ctx.pending_summary,
|
|
include_memory_recent_history=not ctx.ephemeral,
|
|
)
|
|
ctx.user_persisted_early = self._persist_user_message_early(
|
|
ctx.msg, ctx.session
|
|
)
|
|
|
|
if ctx.on_progress is None:
|
|
ctx.on_progress = await self._build_bus_progress_callback(ctx.msg)
|
|
if ctx.on_retry_wait is None:
|
|
ctx.on_retry_wait = await self._build_retry_wait_callback(ctx.msg)
|
|
|
|
return "ok"
|
|
|
|
async def _state_run(self, ctx: TurnContext) -> str:
|
|
if ctx.visible_run_started_at is None:
|
|
ctx.visible_run_started_at = time.time()
|
|
await self._runtime_events().run_status_changed(
|
|
ctx.msg,
|
|
ctx.session_key,
|
|
"running",
|
|
started_at=ctx.visible_run_started_at,
|
|
)
|
|
result = await self._run_agent_loop(
|
|
ctx.initial_messages,
|
|
on_progress=ctx.on_progress,
|
|
on_stream=ctx.on_stream,
|
|
on_stream_end=ctx.on_stream_end,
|
|
on_retry_wait=ctx.on_retry_wait,
|
|
session=ctx.session,
|
|
channel=ctx.msg.channel,
|
|
chat_id=ctx.msg.chat_id,
|
|
message_id=ctx.msg.metadata.get("message_id"),
|
|
metadata=ctx.msg.metadata,
|
|
session_key=ctx.session_key,
|
|
pending_queue=ctx.pending_queue,
|
|
ephemeral=ctx.ephemeral,
|
|
tools=ctx.tools,
|
|
)
|
|
final_content, tools_used, all_msgs, stop_reason, had_injections = result
|
|
ctx.final_content = final_content
|
|
ctx.tools_used = tools_used
|
|
ctx.all_messages = all_msgs
|
|
ctx.stop_reason = stop_reason
|
|
ctx.had_injections = had_injections
|
|
await turn_continuation.maybe_continue_turn(ctx)
|
|
return "ok"
|
|
|
|
async def _state_save(self, ctx: TurnContext) -> str:
|
|
turn_continuation.prepare_save_boundary(ctx)
|
|
|
|
if (
|
|
(ctx.final_content is None or not ctx.final_content.strip())
|
|
and not ctx.suppress_response
|
|
):
|
|
ctx.final_content = EMPTY_FINAL_RESPONSE_MESSAGE
|
|
|
|
latency_started_at = (
|
|
ctx.visible_run_started_at
|
|
if turn_continuation.internal_continuation_inbound(ctx.msg.metadata)
|
|
and ctx.visible_run_started_at is not None
|
|
else ctx.turn_wall_started_at
|
|
)
|
|
ctx.turn_latency_ms = max(0, int((time.time() - latency_started_at) * 1000))
|
|
self._save_turn(
|
|
ctx.session, ctx.all_messages, ctx.save_skip,
|
|
turn_latency_ms=ctx.turn_latency_ms,
|
|
)
|
|
self._runtime_events().record_turn_latency(
|
|
ctx.session_key,
|
|
ctx.turn_latency_ms,
|
|
)
|
|
if not ctx.ephemeral:
|
|
ctx.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,
|
|
replay_max_messages=self._max_messages,
|
|
)
|
|
)
|
|
self._clear_pending_user_turn(ctx.session)
|
|
self._clear_runtime_checkpoint(ctx.session)
|
|
self.sessions.save(ctx.session)
|
|
return "ok"
|
|
|
|
async def _state_respond(self, ctx: TurnContext) -> str:
|
|
if ctx.suppress_response:
|
|
ctx.outbound = None
|
|
return "ok"
|
|
ctx.outbound = self._assemble_outbound(
|
|
ctx.msg,
|
|
ctx.final_content,
|
|
ctx.all_messages,
|
|
ctx.stop_reason,
|
|
ctx.had_injections,
|
|
ctx.on_stream,
|
|
turn_latency_ms=ctx.turn_latency_ms,
|
|
)
|
|
if ctx.ephemeral and ctx.outbound is not None:
|
|
ctx.outbound.metadata["_stop_reason"] = ctx.stop_reason
|
|
return "ok"
|
|
|
|
def _sanitize_persisted_blocks(
|
|
self,
|
|
content: list[dict[str, Any]],
|
|
*,
|
|
should_truncate_text: bool = False,
|
|
drop_runtime: bool = False,
|
|
) -> list[dict[str, Any]]:
|
|
"""Strip volatile multimodal payloads before writing session history."""
|
|
filtered: list[dict[str, Any]] = []
|
|
for block in content:
|
|
if not isinstance(block, dict):
|
|
filtered.append(block)
|
|
continue
|
|
|
|
if (
|
|
drop_runtime
|
|
and block.get("type") == "text"
|
|
and isinstance(block.get("text"), str)
|
|
and block["text"].startswith(ContextBuilder._RUNTIME_CONTEXT_TAG)
|
|
):
|
|
continue
|
|
|
|
if block.get("type") == "image_url" and block.get("image_url", {}).get(
|
|
"url", ""
|
|
).startswith("data:image/"):
|
|
path = (block.get("_meta") or {}).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 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})
|
|
continue
|
|
|
|
filtered.append(block)
|
|
|
|
return filtered
|
|
|
|
def _save_turn(
|
|
self,
|
|
session: Session,
|
|
messages: list[dict],
|
|
skip: int,
|
|
*,
|
|
turn_latency_ms: int | None = None,
|
|
) -> None:
|
|
"""Save new-turn messages into session, truncating large tool results."""
|
|
from datetime import datetime
|
|
|
|
last_assistant_idx: int | None = None
|
|
for m in messages[skip:]:
|
|
entry = dict(m)
|
|
role, content = entry.get("role"), entry.get("content")
|
|
if role == "assistant" and not content and not entry.get("tool_calls"):
|
|
continue # skip empty assistant messages — they poison session context
|
|
if role == "tool":
|
|
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)
|
|
if not filtered:
|
|
continue
|
|
entry["content"] = filtered
|
|
elif role == "user":
|
|
if isinstance(content, str) and ContextBuilder._RUNTIME_CONTEXT_TAG in content:
|
|
# Strip the runtime-context block appended at the end.
|
|
tag_pos = content.find(ContextBuilder._RUNTIME_CONTEXT_TAG)
|
|
before = content[:tag_pos].rstrip("\n ")
|
|
if before:
|
|
entry["content"] = before
|
|
else:
|
|
continue
|
|
if isinstance(content, list):
|
|
filtered = self._sanitize_persisted_blocks(content, drop_runtime=True)
|
|
if not filtered:
|
|
continue
|
|
entry["content"] = filtered
|
|
entry.setdefault("timestamp", datetime.now().isoformat())
|
|
session.messages.append(entry)
|
|
if role == "assistant":
|
|
last_assistant_idx = len(session.messages) - 1
|
|
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)
|
|
session.updated_at = datetime.now()
|
|
|
|
def _persist_subagent_followup(self, session: Session, msg: InboundMessage) -> bool:
|
|
"""Persist subagent follow-ups before prompt assembly so history stays durable.
|
|
|
|
Returns True if a new entry was appended; False if the follow-up was
|
|
deduped (same ``subagent_task_id`` already in session) or carries no
|
|
content worth persisting.
|
|
"""
|
|
if not msg.content:
|
|
return False
|
|
task_id = msg.metadata.get("subagent_task_id") if isinstance(msg.metadata, 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
|
|
):
|
|
return False
|
|
session.add_message(
|
|
"assistant",
|
|
msg.content,
|
|
sender_id=msg.sender_id,
|
|
injected_event="subagent_result",
|
|
subagent_task_id=task_id,
|
|
)
|
|
return True
|
|
|
|
def _set_runtime_checkpoint(self, session: Session, payload: dict[str, Any]) -> None:
|
|
"""Persist the latest in-flight turn state into session metadata."""
|
|
session.metadata[self._RUNTIME_CHECKPOINT_KEY] = payload
|
|
self.sessions.save(session)
|
|
|
|
def _mark_pending_user_turn(self, session: Session) -> None:
|
|
session.metadata[self._PENDING_USER_TURN_KEY] = True
|
|
|
|
def _clear_pending_user_turn(self, session: Session) -> None:
|
|
session.metadata.pop(self._PENDING_USER_TURN_KEY, None)
|
|
|
|
def _clear_runtime_checkpoint(self, session: Session) -> None:
|
|
if self._RUNTIME_CHECKPOINT_KEY in session.metadata:
|
|
session.metadata.pop(self._RUNTIME_CHECKPOINT_KEY, None)
|
|
|
|
@staticmethod
|
|
def _checkpoint_message_key(message: dict[str, Any]) -> tuple[Any, ...]:
|
|
return (
|
|
message.get("role"),
|
|
message.get("content"),
|
|
message.get("tool_call_id"),
|
|
message.get("name"),
|
|
message.get("tool_calls"),
|
|
message.get("reasoning_content"),
|
|
message.get("thinking_blocks"),
|
|
)
|
|
|
|
def _restore_runtime_checkpoint(self, session: Session) -> bool:
|
|
"""Materialize an unfinished turn into session history before a new request."""
|
|
from datetime import datetime
|
|
|
|
checkpoint = session.metadata.get(self._RUNTIME_CHECKPOINT_KEY)
|
|
if not isinstance(checkpoint, dict):
|
|
return False
|
|
|
|
assistant_message = checkpoint.get("assistant_message")
|
|
completed_tool_results = checkpoint.get("completed_tool_results") or []
|
|
pending_tool_calls = checkpoint.get("pending_tool_calls") or []
|
|
|
|
restored_messages: list[dict[str, Any]] = []
|
|
if isinstance(assistant_message, dict):
|
|
restored = dict(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.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"
|
|
restored_messages.append(
|
|
{
|
|
"role": "tool",
|
|
"tool_call_id": tool_id,
|
|
"name": name,
|
|
"content": "Error: Task interrupted before this tool finished.",
|
|
"timestamp": datetime.now().isoformat(),
|
|
}
|
|
)
|
|
|
|
overlap = 0
|
|
max_overlap = min(len(session.messages), len(restored_messages))
|
|
for size in range(max_overlap, 0, -1):
|
|
existing = session.messages[-size:]
|
|
restored = restored_messages[:size]
|
|
if all(
|
|
self._checkpoint_message_key(left) == self._checkpoint_message_key(right)
|
|
for left, right in zip(existing, restored)
|
|
):
|
|
overlap = size
|
|
break
|
|
session.messages.extend(restored_messages[overlap:])
|
|
|
|
self._clear_pending_user_turn(session)
|
|
self._clear_runtime_checkpoint(session)
|
|
return True
|
|
|
|
def _restore_pending_user_turn(self, session: Session) -> bool:
|
|
"""Close a turn that only persisted the user message before crashing."""
|
|
from datetime import datetime
|
|
|
|
if not session.metadata.get(self._PENDING_USER_TURN_KEY):
|
|
return False
|
|
|
|
if session.messages and session.messages[-1].get("role") == "user":
|
|
session.messages.append(
|
|
{
|
|
"role": "assistant",
|
|
"content": "Error: Task interrupted before a response was generated.",
|
|
"timestamp": datetime.now().isoformat(),
|
|
}
|
|
)
|
|
session.updated_at = datetime.now()
|
|
|
|
self._clear_pending_user_turn(session)
|
|
return True
|
|
|
|
async def process_direct(
|
|
self,
|
|
content: str,
|
|
session_key: str = "cli:direct",
|
|
channel: str = "cli",
|
|
chat_id: str = "direct",
|
|
media: list[str] | None = None,
|
|
on_progress: Callable[..., Awaitable[None]] | None = None,
|
|
on_stream: Callable[[str], Awaitable[None]] | None = None,
|
|
on_stream_end: Callable[..., Awaitable[None]] | None = None,
|
|
ephemeral: bool = False,
|
|
tools: ToolRegistry | None = None,
|
|
) -> OutboundMessage | None:
|
|
"""Process a message directly and return the outbound payload."""
|
|
await self._connect_mcp()
|
|
msg = InboundMessage(
|
|
channel=channel, sender_id="user", chat_id=chat_id,
|
|
content=content, media=media or [],
|
|
)
|
|
# Share the dispatch lock so direct calls serialize with bus turns.
|
|
lock = self._session_locks.setdefault(session_key, asyncio.Lock())
|
|
try:
|
|
async with lock:
|
|
kwargs: dict[str, Any] = {
|
|
"session_key": session_key,
|
|
"on_progress": on_progress,
|
|
"on_stream": on_stream,
|
|
"on_stream_end": on_stream_end,
|
|
"ephemeral": ephemeral,
|
|
}
|
|
if tools is not None:
|
|
kwargs["tools"] = tools
|
|
return await self._process_message(
|
|
msg,
|
|
**kwargs,
|
|
)
|
|
finally:
|
|
await self._runtime_events().run_status_changed(msg, session_key, "idle")
|
|
self._runtime_events().clear_turn(session_key)
|