fix runtime journal run lifecycle events (#3470)

backend/packages/harness/deerflow/runtime/journal.py

@@ -164,7 +164,18 @@ class RunJournal(BaseCallbackHandler):
                 metadata={"caller": caller, **(metadata or {})},
             )
 
-    def on_chain_end(self, outputs: Any, *, run_id: UUID, **kwargs: Any) -> None:
+    def on_chain_end(
+        self,
+        outputs: Any,
+        *,
+        run_id: UUID,
+        parent_run_id: UUID | None = None,
+        **kwargs: Any,
+    ) -> None:
+        # Nested chain ends fire for internal graph nodes; only the root chain
+        # represents the user-visible run lifecycle.
+        if parent_run_id is not None:
+            return
         self._put(event_type="run.end", category="outputs", content=outputs, metadata={"status": "success"})
         self._flush_sync()
 

backend/tests/test_run_journal.py

@@ -179,15 +179,16 @@ class TestLifecycleCallbacks:
         assert "run.end" in types
 
     @pytest.mark.anyio
-    async def test_nested_chain_no_run_start(self, journal_setup):
-        """Nested chains (parent_run_id set) should NOT produce run.start."""
+    async def test_nested_chain_no_run_lifecycle_events(self, journal_setup):
+        """Nested chains (parent_run_id set) should NOT produce root run lifecycle events."""
         j, store = journal_setup
         parent_id = uuid4()
         j.on_chain_start({}, {}, run_id=uuid4(), parent_run_id=parent_id)
-        j.on_chain_end({}, run_id=uuid4())
+        j.on_chain_end({}, run_id=uuid4(), parent_run_id=parent_id)
         await j.flush()
         events = await store.list_events("t1", "r1")
         assert not any(e["event_type"] == "run.start" for e in events)
+        assert not any(e["event_type"] == "run.end" for e in events)
 
 
 class TestToolCallbacks: