chore(fleet): sync operator memory, hatch menu dialogs, and watchdog alerts

bin/subagent_tracker.py

@@ -59,8 +59,40 @@ def register_session(parent, session_id, title=None, prompt=None):
     return entry
 
 
-def get_active_sessions(parent=None):
+DEFAULT_TTL_SECONDS = 3600  # 1 hour idle TTL
+
+
+def prune_stale_sessions(ttl_seconds=DEFAULT_TTL_SECONDS):
+    """Archive active sessions whose last activity exceeds ttl_seconds."""
+    data = load_sessions()
+    now = datetime.now(timezone.utc)
+    changed = False
+    for sid, s in data.items():
+        if s.get("status") == "active":
+            last_act = s.get("last_activity_at") or s.get("spawned_at")
+            if last_act:
+                try:
+                    dt = datetime.fromisoformat(last_act.replace("Z", "+00:00"))
+                    if dt.tzinfo is None:
+                        dt = dt.replace(tzinfo=timezone.utc)
+                    if (now - dt).total_seconds() >= ttl_seconds:
+                        s["status"] = "archived"
+                        s["archived_at"] = utcnow()
+                        s["archive_reason"] = f"idle_ttl_exceeded_{ttl_seconds}s"
+                        changed = True
+                except Exception:
+                    pass
+    if changed:
+        save_sessions(data)
+
+
+def get_active_sessions(parent=None, auto_prune=True, ttl_seconds=DEFAULT_TTL_SECONDS):
     """Retrieve all active subagent sessions, optionally filtered by parent."""
+    if auto_prune:
+        try:
+            prune_stale_sessions(ttl_seconds=ttl_seconds)
+        except Exception:
+            pass
     data = load_sessions()
     results = []
     for s in data.values():
@@ -88,6 +120,14 @@ def complete_session(session_id, note=None):
     return update_session(session_id, **kwargs)
 
 
+def archive_session(session_id, reason=None):
+    """Mark a subagent session archived."""
+    kwargs = {"status": "archived", "archived_at": utcnow()}
+    if reason:
+        kwargs["archive_reason"] = reason
+    return update_session(session_id, **kwargs)
+
+
 if __name__ == "__main__":
     if len(sys.argv) > 1 and sys.argv[1] == "list":
         print(json.dumps(load_sessions(), indent=2))