feat: add thought_search tool for querying Timmy's thinking history (#260)

Co-authored-by: Kimi Agent <kimi@timmy.local>
Co-committed-by: Kimi Agent <kimi@timmy.local>

src/timmy/tools.py

@@ -619,6 +619,17 @@ def _register_gematria_tool(toolkit: Toolkit) -> None:
         logger.debug("Gematria tool not available")
 
 
+def _register_thinking_tools(toolkit: Toolkit) -> None:
+    """Register thinking/introspection tools for self-reflection."""
+    try:
+        from timmy.thinking import search_thoughts
+
+        toolkit.register(search_thoughts, name="thought_search")
+    except (ImportError, AttributeError) as exc:
+        logger.warning("Tool execution failed (Thinking tools registration): %s", exc)
+        logger.debug("Thinking tools not available")
+
+
 def create_full_toolkit(base_dir: str | Path | None = None):
     """Create a full toolkit with all available tools (for the orchestrator).
 
@@ -646,6 +657,7 @@ def create_full_toolkit(base_dir: str | Path | None = None):
     _register_introspection_tools(toolkit)
     _register_delegation_tools(toolkit)
     _register_gematria_tool(toolkit)
+    _register_thinking_tools(toolkit)
 
     # Gitea issue management is now provided by the gitea-mcp server
     # (wired in as MCPTools in agent.py, not registered here)
@@ -837,6 +849,11 @@ def _introspection_tool_catalog() -> dict:
             "description": "Search past conversation logs for messages, tool calls, errors, and decisions",
             "available_in": ["orchestrator"],
         },
+        "thought_search": {
+            "name": "Thought Search",
+            "description": "Query Timmy's own thought history for past reflections and insights",
+            "available_in": ["orchestrator"],
+        },
     }