diff --git a/src/daemon/health.py b/src/daemon/health.py
index 14a63dc..bbd3df2 100644
--- a/src/daemon/health.py
+++ b/src/daemon/health.py
@@ -52,12 +52,13 @@ class HealthChecker:
             return result
 
         queries = Queries(db_path)
-        events = queries.recent_events(limit=1)
+        events = queries.recent_events(limit=5)
 
-        # 判断是否有"真实"变更（排除 daemon_tick 自身）
+        # 判断是否有"真实"变更（排除 daemon_tick 和系统自动检测事件）
+        system_events = {"daemon_tick", "agent_zombie_detected"}
         has_real_change = False
         for e in events:
-            if e.get("event_type") != "daemon_tick":
+            if e.get("event_type") not in system_events:
                 has_real_change = True
                 break