diff --git a/deploy/profile-scripts/agent_spiral_watchdog.py b/deploy/profile-scripts/agent_spiral_watchdog.py
index 5451d4c1..89b109d5 100644
--- a/deploy/profile-scripts/agent_spiral_watchdog.py
+++ b/deploy/profile-scripts/agent_spiral_watchdog.py
@@ -14,6 +14,9 @@ import json, os, sqlite3, glob
 from datetime import datetime
 
 STATE_FILE = "/home/hmo/MoFin/gateway/logs/spiral_watchdog_state.json"
+# 2026-08-19 僵尸会话检测：记录每 session 上次 msg 数，停滞不增长 = 僵尸（非螺旋）
+ZOMBIE_GROWTH = 0.001  # 若本轮 msgs 相对上次增长 < 0.1%（停滞）→ 僵尸跳过
+MIN_GROW_TO_ALERT = 20  # 真螺旋：本次 msgs 比上次增长 >= 20 条才 XMPP 告警（飞速跑）
 LOG = "/home/hmo/MoFin/gateway/logs/spiral_watchdog.log"
 MIN_AGE_SEC = 15 * 60
 MIN_MESSAGES = 80
@@ -67,6 +70,7 @@ def _to_ms(ts):
 def main():
     st = load_state()
     alerted = set(st.get("alerted", []))
+    prev_msgs = st.get("prev_msgs", {})  # {sid: last_msg_count}
     now_ms = datetime.now().timestamp() * 1000
     found = 0
 
@@ -98,22 +102,38 @@ def main():
                 continue
             if (r["message_count"] or 0) < MIN_MESSAGES:
                 continue
-            sid = r["id"]
+            sid = str(r["id"])
+            mc = r["message_count"] or 0
+            # 僵尸会话检测：同 session msgs 停滞不增长 → 不是螺旋（7/31 旧会话 bug 教训）
+            prev = prev_msgs.get(sid)
+            if prev is not None and abs(mc - prev) <= 1:
+                # 停滞 → 僵尸，仅记录不再告警
+                log(f"ZOMBIE: [{profile}] {sid} msgs={mc}（停滞，非螺旋，跳过）")
+                continue
             if sid in alerted:
                 continue
             found += 1
             alerted.add(sid)
-            msg = (f"agent 螺旋嫌疑\n"
-                   f"profile: {profile}\n"
-                   f"session: {sid}\n"
-                   f"已运行: {age_sec/60:.0f} 分钟\n"
-                   f"消息数: {r['message_count']} | 工具调用: {r['tool_call_count']} | "
-                   f"输入token: {r['input_tokens']}\n"
-                   f"特征类似 603288 事件。正常长任务可忽略；否则需人工检查。")
-            log(f"SPIRAL: [{profile}] {sid} age={age_sec/60:.0f}min msgs={r['message_count']} tools={r['tool_call_count']}")
-            xmpp(msg)
+            prev_msgs[sid] = mc
+            # 真螺旋判定：首次发现（prev 为 None）→ 只写日志
+            # 之后 msgs 快速增长（>=MIN_GROW_TO_ALERT）→ XMPP 告警（跑飞了）
+            if prev is not None and mc - prev >= MIN_GROW_TO_ALERT:
+                msg = (f"🚨 agent 螺旋确认（msgs 快速增长）\n"
+                       f"profile: {profile}\n"
+                       f"session: {sid}\n"
+                       f"已运行: {age_sec/60:.0f} 分钟\n"
+                       f"消息数: {mc}（上轮 {prev}）| 工具: {r['tool_call_count']}\n"
+                       f"⚠️ 疑似跑飞，需人工处理。")
+                xmpp(msg)  # 真螺旋才 XMPP
+                log(f"SPIRAL-CONFIRMED: [{profile}] {sid} msgs {prev}→{mc}")
+            else:
+                if prev is not None:
+                    log(f"SPIRAL: [{profile}] {sid} age={age_sec/60:.0f}min msgs={mc} (较上轮 {mc-prev:+d})")
+                else:
+                    log(f"SPIRAL: [{profile}] {sid} age={age_sec/60:.0f}min msgs={mc}")
 
-    st["alerted"] = sorted(alerted)
+    st["alerted"] = sorted(alerted)[-200:]  # 去重窗口扩大（2026-08-19 防僵尸被挤掉）
+    st["prev_msgs"] = dict(list(prev_msgs.items())[-500:])
     save_state(st)
     log(f"── 结束: 新告警 {found} ──")
     return 0