[loop-cycle-63] feat: session_history tool — Timmy searches past conversations (#251) (#258)

src/timmy/tools.py

@@ -586,6 +586,14 @@ def _register_introspection_tools(toolkit: Toolkit) -> None:
         logger.warning("Tool execution failed (Introspection tools registration): %s", exc)
         logger.debug("Introspection tools not available")
 
+    try:
+        from timmy.session_logger import session_history
+
+        toolkit.register(session_history, name="session_history")
+    except (ImportError, AttributeError) as exc:
+        logger.warning("Tool execution failed (session_history registration): %s", exc)
+        logger.debug("session_history tool not available")
+
 
 def _register_delegation_tools(toolkit: Toolkit) -> None:
     """Register inter-agent delegation tools."""
@@ -824,6 +832,11 @@ def _introspection_tool_catalog() -> dict:
             "description": "Check status of memory tiers (hot memory, vault)",
             "available_in": ["orchestrator"],
         },
+        "session_history": {
+            "name": "Session History",
+            "description": "Search past conversation logs for messages, tool calls, errors, and decisions",
+            "available_in": ["orchestrator"],
+        },
     }