fix(agent): honor selected project workspace

nanobot/agent/context.py

@@ -112,6 +112,14 @@ class ContextBuilder:
 
         parts.append(render_template("agent/tool_contract.md"))
 
+        project_path = root.expanduser().resolve()
+        if project_path != self.workspace.expanduser().resolve():
+            parts.append(
+                "# Current Project\n\n"
+                f"Working directory: {project_path}\n"
+                "Use it as the default root for project files and relative tool paths."
+            )
+
         if include_memory:
             memory = self.memory.read_memory()
             if memory and not self._is_template_content(memory, "memory/MEMORY.md"):

tests/agent/test_context_prompt_cache.py

@@ -49,6 +49,29 @@ def test_system_prompt_stays_stable_when_clock_changes(tmp_path, monkeypatch) ->
     assert prompt1 == prompt2
 
 
+def test_selected_project_path_follows_shared_cache_prefix(tmp_path) -> None:
+    """Project paths must not invalidate the stable identity and tool contract prefix."""
+    agent_home = tmp_path / "agent-home"
+    project_a = tmp_path / "project-a"
+    project_b = tmp_path / "project-b"
+    agent_home.mkdir()
+    project_a.mkdir()
+    project_b.mkdir()
+    builder = ContextBuilder(agent_home)
+
+    prompt_a = builder.build_system_prompt(workspace=project_a)
+    prompt_b = builder.build_system_prompt(workspace=project_b)
+    marker = "# Current Project"
+    prefix_a = prompt_a[: prompt_a.index(marker)]
+    prefix_b = prompt_b[: prompt_b.index(marker)]
+
+    assert prefix_a == prefix_b
+    assert "# Tool Usage Notes" in prefix_a
+    assert str(project_a.resolve()) not in prefix_a
+    assert str(project_b.resolve()) not in prefix_b
+    assert prompt_a == builder.build_system_prompt(workspace=project_a)
+
+
 def test_system_prompt_reflects_current_dream_memory_contract(tmp_path) -> None:
     workspace = _make_workspace(tmp_path)
     builder = ContextBuilder(workspace)

tests/agent/test_workspace_scope.py

@@ -8,6 +8,7 @@ from unittest.mock import MagicMock
 
 import pytest
 
+from nanobot.agent.context import ContextBuilder
 from nanobot.agent.tools.cli_apps import CliAppsTool
 from nanobot.agent.tools.context import RequestContext, ToolContext, request_context
 from nanobot.agent.tools.filesystem import ReadFileTool, WriteFileTool
@@ -21,6 +22,7 @@ from nanobot.config.schema import ImageGenerationToolConfig, ProviderConfig, Too
 from nanobot.security.workspace_access import (
     WORKSPACE_SCOPE_METADATA_KEY,
     WorkspaceScopeError,
+    WorkspaceScopeResolver,
     bind_workspace_scope,
     default_workspace_scope,
     reset_workspace_scope,
@@ -101,6 +103,34 @@ def test_workspace_scope_accepts_home_relative_project_path(
     assert scope.metadata()["project_path"] == str(project.resolve())
 
 
+@pytest.mark.parametrize("access_mode", ["restricted", "full"])
+def test_selected_websocket_project_is_visible_to_the_model(
+    tmp_path: Path,
+    access_mode: str,
+) -> None:
+    agent_home = tmp_path / "agent-home"
+    project = tmp_path / "project"
+    agent_home.mkdir()
+    project.mkdir()
+    resolver = WorkspaceScopeResolver(agent_home, default_restrict_to_workspace=False)
+
+    scope = resolver.for_turn(
+        channel="websocket",
+        message_metadata={
+            WORKSPACE_SCOPE_METADATA_KEY: {
+                "project_path": str(project),
+                "access_mode": access_mode,
+            }
+        },
+        session_metadata=None,
+    )
+    prompt = ContextBuilder(agent_home).build_system_prompt(workspace=scope.project_path)
+
+    assert prompt.index("# Tool Usage Notes") < prompt.index("# Current Project")
+    assert f"Working directory: {project.resolve()}" in prompt
+    assert "Use it as the default root for project files" in prompt
+
+
 def test_workspace_scope_metadata_falls_back_for_stale_session(tmp_path: Path) -> None:
     scope = workspace_scope_from_metadata(
         {