diff --git a/apps/memos-local-plugin/adapters/hermes/memos_provider/__init__.py b/apps/memos-local-plugin/adapters/hermes/memos_provider/__init__.py
index 25546dfff..7228c4aa2 100644
--- a/apps/memos-local-plugin/adapters/hermes/memos_provider/__init__.py
+++ b/apps/memos-local-plugin/adapters/hermes/memos_provider/__init__.py
@@ -2111,11 +2111,15 @@ def _turn_end(
         if agent_thinking:
             payload["agentThinking"] = agent_thinking
         result = self._bridge.request("turn.end", payload, timeout=_LONG_RPC_TIMEOUT)
-        # Capture the trace ID for feedback submission
+        # Capture the trace ID for feedback submission. The core contract
+        # (memory-core.ts onTurnEnd) returns a singular `traceId`; accept
+        # the plural form too for forward compatibility.
         if result and isinstance(result, dict):
-            trace_ids = result.get("traceIds", [])
-            if trace_ids and len(trace_ids) > 0:
-                trace_id = trace_ids[-1]  # Last trace is the current turn
+            trace_id = result.get("traceId") or ""
+            if not trace_id:
+                trace_ids = result.get("traceIds") or []
+                trace_id = trace_ids[-1] if trace_ids else ""
+            if trace_id:
                 self._last_trace_id = trace_id
                 return trace_id
         return ""
diff --git a/apps/memos-local-plugin/tests/python/test_hermes_provider_pipeline.py b/apps/memos-local-plugin/tests/python/test_hermes_provider_pipeline.py
index 1c8cb6a6c..4992fe6a7 100644
--- a/apps/memos-local-plugin/tests/python/test_hermes_provider_pipeline.py
+++ b/apps/memos-local-plugin/tests/python/test_hermes_provider_pipeline.py
@@ -114,6 +114,9 @@ def test_lifecycle_persists_turn_and_closes_real_episode(self) -> None:
 
         turn_end = next(params for method, params in bridge.calls if method == "turn.end")
         self.assertEqual(turn_end["agent"], "hermes")
+        # The core returns a singular `traceId` (memory-core.ts onTurnEnd);
+        # it must be captured for verifier-feedback trace binding.
+        self.assertEqual(provider._last_trace_id, "trace-1")
         self.assertEqual(turn_end["sessionId"], "host-session")
         self.assertEqual(turn_end["episodeId"], "episode-from-turn-start")
         self.assertIn("HERMES_MEMOS_E2E_0428", turn_end["userText"])