feat(hooks): session:compress event_callback for MemPalace sync

agent/agent_init.py

@@ -27,7 +27,7 @@ import threading
 import time
 import uuid
 from datetime import datetime
-from typing import Any, Dict, List, Optional
+from typing import Any, Callable, Dict, List, Optional
 from urllib.parse import urlparse, parse_qs, urlunparse
 
 from agent.context_compressor import ContextCompressor
@@ -195,6 +195,7 @@ def init_agent(
     status_callback: callable = None,
     notice_callback: callable = None,
     notice_clear_callback: callable = None,
+    event_callback: Optional[Callable[[str, dict], None]] = None,
     max_tokens: int = None,
     reasoning_config: Dict[str, Any] = None,
     service_tier: str = None,
@@ -426,6 +427,7 @@ def init_agent(
     agent.status_callback = status_callback
     agent.notice_callback = notice_callback
     agent.notice_clear_callback = notice_clear_callback
+    agent.event_callback = event_callback
     agent.tool_gen_callback = tool_gen_callback
 
     

agent/conversation_compression.py

@@ -603,6 +603,20 @@ def compress_context(
             force=True,
         )
 
+    # Emit session:compress event so hooks (e.g. MemPalace sync) can ingest
+    # the completed old session before its details are lost.
+    _old_sid_for_event = locals().get("old_session_id")
+    if getattr(agent, "event_callback", None):
+        try:
+            agent.event_callback("session:compress", {
+                "platform": agent.platform or "",
+                "session_id": agent.session_id,
+                "old_session_id": _old_sid_for_event or "",
+                "compression_count": agent.context_compressor.compression_count,
+            })
+        except Exception as e:
+            logger.debug("event_callback error on session:compress: %s", e)
+
     # Keep the post-compression rough estimate for diagnostics, but do not
     # treat it as provider-reported prompt usage. Schema-heavy rough estimates
     # can remain above threshold even after the next real API request fits.