feat: add workflow action outcomes and tracing

backend/tests/test_conversation_history.py

@@ -1,7 +1,8 @@
 from __future__ import annotations
 
 import unittest
-from unittest.mock import AsyncMock
+from types import SimpleNamespace
+from unittest.mock import AsyncMock, patch
 
 from services.conversation_history import ConversationRecorder
 
@@ -32,6 +33,53 @@ class ConversationRecorderTest(unittest.IsolatedAsyncioTestCase):
             },
         )
 
+    async def test_workflow_trace_is_persisted_without_counting_as_message(self):
+        conversation = SimpleNamespace(
+            extra={"workflow": {"revision": "sha256:test"}},
+            message_count=3,
+        )
+
+        class FakeSession:
+            committed = False
+
+            async def __aenter__(self):
+                return self
+
+            async def __aexit__(self, *_args):
+                return None
+
+            async def get(self, _model, _session_id):
+                return conversation
+
+            async def commit(self):
+                self.committed = True
+
+        session = FakeSession()
+        recorder = ConversationRecorder("conv_test")
+        event = {
+            "type": "workflow-event",
+            "eventId": "wfe_test",
+            "event": "node_entered",
+            "timestamp": "2026-08-01T10:00:00+08:00",
+            "workflowRevision": "sha256:test",
+            "transitionId": 0,
+            "nodeId": "start",
+        }
+
+        with patch(
+            "services.conversation_history.SessionLocal",
+            return_value=session,
+        ):
+            await recorder.record_transport_message(event)
+            await recorder.record_transport_message(event)
+
+        self.assertTrue(session.committed)
+        self.assertEqual(conversation.message_count, 3)
+        self.assertEqual(len(conversation.extra["workflowTrace"]), 1)
+        saved = conversation.extra["workflowTrace"][0]
+        self.assertEqual(saved["sessionId"], "conv_test")
+        self.assertEqual(saved["sequence"], 1)
+
 
 if __name__ == "__main__":
     unittest.main()