fix(heartbeat): skip when HEARTBEAT.md has no tasks and fail closed on delivery (#4111)

tests/agent/test_evaluator.py

@@ -61,3 +61,21 @@ async def test_no_tool_call_fallback() -> None:
     provider = DummyProvider([LLMResponse(content="I think you should notify", tool_calls=[])])
     result = await evaluate_response("some response", "some task", provider, "m")
     assert result is True
+
+
+@pytest.mark.asyncio
+async def test_fail_closed_on_error() -> None:
+    class FailingProvider(DummyProvider):
+        async def chat(self, *args, **kwargs) -> LLMResponse:
+            raise RuntimeError("provider down")
+
+    provider = FailingProvider([])
+    result = await evaluate_response("some", "task", provider, "m", default_notify=False)
+    assert result is False
+
+
+@pytest.mark.asyncio
+async def test_fail_closed_on_no_tool_call() -> None:
+    provider = DummyProvider([LLMResponse(content="text only", tool_calls=[])])
+    result = await evaluate_response("some", "task", provider, "m", default_notify=False)
+    assert result is False