diff --git a/src/daemon/spawner.py b/src/daemon/spawner.py
index a48882f..055f3c5 100644
--- a/src/daemon/spawner.py
+++ b/src/daemon/spawner.py
@@ -1158,6 +1158,13 @@ curl -X POST http://{api_host}:{api_port}/api/projects/{project_id}/tasks/{task_
         """获取 session 信息"""
         return self._sessions.get(session_id)
 
+    def get_session_by_agent(self, agent_id: str) -> Optional[Dict[str, Any]]:
+        """v2.7.2: 根据 agent_id 获取活跃 session 信息（用于进程存活性检查）"""
+        for sid, info in self._sessions.items():
+            if info.get("agent_id") == agent_id and info.get("status") == "running":
+                return info
+        return None
+
     def cleanup_session(self, session_id: str) -> None:
         """清理 session"""
         if session_id in self._sessions: