Fix: mc2-memory Provider flusht offene Turns bei Session-Ende

shutdown() + on_session_end() schreiben verbliebene Queue-Eintraege synchron raus
(_flush), damit kurzlebige Prozesse den Hintergrund-Worker nicht mitten im /learn-POST
killen. Live verifiziert: hands-off Auto-Lernen via Gateway (source=hermes) + Recall.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

hermes/plugins/mc2-memory/__init__.py

@@ -25,6 +25,7 @@ import logging
 import os
 import queue
 import threading
+import time
 from typing import Any, Dict, List, Optional
 
 import httpx
@@ -128,6 +129,14 @@ class MC2MemoryProvider(MemoryProvider):
         # Neue Fakten können gelandet sein → Recall-Cache invalidieren.
         self._recall_cache.clear()
 
+    def _post_learn(self, msgs: list) -> None:
+        try:
+            httpx.post(f"{MC_URL}/api/memory/learn",
+                       json={"messages": msgs, "source": "hermes"},
+                       headers=_headers(), timeout=90.0)
+        except Exception as exc:
+            log.debug("mc2-memory learn POST failed: %s", exc)
+
     def _run(self) -> None:
         while not self._stop.is_set():
             try:
@@ -135,20 +144,32 @@ class MC2MemoryProvider(MemoryProvider):
             except queue.Empty:
                 continue
             try:
-                httpx.post(f"{MC_URL}/api/memory/learn",
-                           json={"messages": msgs, "source": "hermes"},
-                           headers=_headers(), timeout=120.0)
-            except Exception as exc:
-                log.debug("mc2-memory learn POST failed: %s", exc)
+                self._post_learn(msgs)
             finally:
                 self._q.task_done()
 
+    def _flush(self) -> None:
+        """Offene Turns garantiert rausschreiben — bei Session-Ende/CLI-Exit, wo der
+        Prozess sofort beendet wird (daemon-Worker würde sonst mitten im POST sterben)."""
+        self._stop.set()
+        if self._worker and self._worker.is_alive():
+            self._worker.join(timeout=95.0)  # laufenden Worker-POST zu Ende lassen
+        while True:                          # vom Worker nicht mehr abgeholte Turns
+            try:
+                msgs = self._q.get_nowait()
+            except queue.Empty:
+                break
+            self._post_learn(msgs)
+
     # -- Context-only: keine Agent-Tools → kein Tool-Loop --------------------
     def get_tool_schemas(self) -> List[Dict[str, Any]]:
         return []
 
+    def on_session_end(self, messages: List[Dict[str, Any]]) -> None:
+        self._flush()
+
     def shutdown(self) -> None:
-        self._stop.set()
+        self._flush()
 
 
 def register(ctx) -> None: