fix(agent): make title generation timeout configurable via auxiliary.title_generation.timeout

agent/title_generator.py

@@ -29,7 +29,7 @@
 def generate_title(
     user_message: str,
     assistant_response: str,
-    timeout: float = 30.0,
+    timeout: Optional[float] = None,
     failure_callback: Optional[FailureCallback] = None,
     main_runtime: dict = None,
 ) -> Optional[str]:
@@ -43,6 +43,10 @@ def generate_title(
     auxiliary call raises — the caller typically wires this to
     ``AIAgent._emit_auxiliary_failure`` so the user sees a warning instead
     of silently accumulating untitled sessions.
+
+    ``timeout`` defaults to ``None``, which makes ``call_llm()`` resolve it
+    from ``auxiliary.title_generation.timeout`` in config.yaml (falling
+    back to 30 s).  Pass a float to override programmatically.
     """
     # Truncate long messages to keep the request small
     user_snippet = user_message[:500] if user_message else ""

tests/agent/test_title_generator.py

@@ -113,6 +113,22 @@ def mock_call_llm(**kwargs):
         user_content = captured_kwargs["messages"][1]["content"]
         assert len(user_content) < 1100  # 500 + 500 + formatting
 
+    def test_passes_timeout_none_when_not_specified(self):
+        """When no timeout is given, None is passed so config resolution works."""
+        captured_kwargs = {}
+
+        def mock_call_llm(**kwargs):
+            captured_kwargs.update(kwargs)
+            resp = MagicMock()
+            resp.choices = [MagicMock()]
+            resp.choices[0].message.content = "Title"
+            return resp
+
+        with patch("agent.title_generator.call_llm", side_effect=mock_call_llm):
+            generate_title("q", "a")
+
+        assert captured_kwargs["timeout"] is None
+
 
 class TestAutoTitleSession:
     """Tests for auto_title_session() — the sync worker function."""