diff --git a/docs/PRD.md b/docs/PRD.md
index a726e96..f72d6b3 100644
--- a/docs/PRD.md
+++ b/docs/PRD.md
@@ -90,7 +90,7 @@
 | 编号 | 问题 | 影响 | 当前措施 | 优先级 | 当前状态 |
 |------|------|------|----------|--------|----------|
 | R01 | Gateway 进程意外退出未自动拉起 | 服务中断 | 无自动恢复 | P0 | 🔄 Gateway 健康已纳入监控(I/J Tab显示), 自动拉起待 systemd 配置 |
-| R02 | XMPP Bot 断线后重连失败 | 消息丢失 | slixmpp reconnect 不可靠 | P0 | ✅ frp heartbeat已加 |
+| R02 | XMPP Bot 断线后重连失败 | 消息丢失 | slixmpp reconnect 不可靠 | P0 | ✅ frp heartbeat + 应用层保活(60s检测×3→exit→systemd重启) |
 | R03 | Provider key 过期/配额超限无告警 | LLM 调用失败 | fallback 不总能触发 | P0 | 🔄 fallback链待验证 |
 | R04 | Session 膨胀导致响应退化 | 回复质量下降 | 硬截断 200 条 | P1 | ✅ 硬截断200条已实现 |
 | R05 | SOUL vs MEMORY 规则冲突 | 行为异常 | 需手动清理 memory | P1 | 🔄 需持续维护 |
diff --git a/xmpp_agent_core.py b/xmpp_agent_core.py
index cafef66..3a836d0 100644
--- a/xmpp_agent_core.py
+++ b/xmpp_agent_core.py
@@ -1165,9 +1165,20 @@ def main():
     loop = asyncio.get_event_loop()
 
     async def _status_check():
+        skipped = 0
         while True:
             await asyncio.sleep(60)
-            log("(alive)")
+            alive = bot and bot.is_connected() if hasattr(bot, 'is_connected') else False
+            if not alive:
+                skipped += 1
+                log(f"[R02] XMPP 连接已断开 ({skipped}/3)，等待重连...")
+                if skipped >= 3:
+                    log("[R02] 连续 3 次检测到连接断开，退出进程让 systemd 重启")
+                    os._exit(1)
+            else:
+                if skipped > 0:
+                    log(f"(连接已恢复，跳过 {skipped} 次检测)")
+                    skipped = 0
 
     asyncio.ensure_future(_status_check())