diff --git a/src/daemon/ticker.py b/src/daemon/ticker.py
index 8c526c5..0c8c821 100644
--- a/src/daemon/ticker.py
+++ b/src/daemon/ticker.py
@@ -671,6 +671,16 @@ class Ticker:
         """从 Dispatcher 获取 counter"""
         return getattr(self.dispatcher, 'counter', None) if self.dispatcher else None
 
+    @staticmethod
+    def _is_pid_alive(pid: int) -> bool:
+        """检查进程是否存活"""
+        import os
+        try:
+            os.kill(pid, 0)
+            return True
+        except (ProcessLookupError, PermissionError):
+            return False
+
     def _get_idle_agents(self) -> List[str]:
         """获取当前空闲的 Agent 列表（从 config agents 取，而非 counter._per_agent）"""
         if not self.counter: