diff --git a/scripts/gateway_monitor.py b/scripts/gateway_monitor.py
new file mode 100644
index 0000000..ba35e85
--- /dev/null
+++ b/scripts/gateway_monitor.py
@@ -0,0 +1,183 @@
+#!/usr/bin/env python3
+"""Gateway 存活监控脚本
+
+每 10 秒探测一次 Gateway WebSocket 端口，记录状态到日志文件。
+用于长期验证 Gateway 稳定性，确认 Phase -1 方案可行。
+
+用法:
+  python3 scripts/gateway_monitor.py                    # 默认 localhost:18789
+  python3 scripts/gateway_monitor.py --interval 5       # 5 秒间隔
+  python3 scripts/gateway_monitor.py --host 192.168.2.153 --port 18789
+
+输出:
+  logs/gateway_monitor.log  (每行: timestamp | status | latency_ms | detail)
+
+停止:
+  Ctrl+C
+"""
+
+import asyncio
+import argparse
+import time
+import signal
+import sys
+from pathlib import Path
+from datetime import datetime
+
+# 日志目录
+LOG_DIR = Path(__file__).parent.parent / "logs"
+LOG_FILE = LOG_DIR / "gateway_monitor.log"
+
+# 统计
+stats = {
+    "total": 0,
+    "ok": 0,
+    "fail": 0,
+    "consecutive_fail": 0,
+    "max_consecutive_fail": 0,
+    "min_ms": float("inf"),
+    "max_ms": 0,
+    "total_ms": 0,
+}
+
+
+async def probe_gateway(host: str, port: int, timeout: float = 3.0) -> dict:
+    """探测 Gateway WebSocket 端口"""
+    start = time.monotonic()
+    try:
+        reader, writer = await asyncio.wait_for(
+            asyncio.open_connection(host, port), timeout=timeout
+        )
+        # 发 WebSocket Upgrade 请求
+        upgrade_req = (
+            "GET /ws HTTP/1.1\r\n"
+            f"Host: {host}:{port}\r\n"
+            "Upgrade: websocket\r\n"
+            "Connection: Upgrade\r\n"
+            "Sec-WebSocket-Key: dGhlIHNhbXBsZSBub25jZQ==\r\n"
+            "Sec-WebSocket-Version: 13\r\n"
+            "\r\n"
+        )
+        writer.write(upgrade_req.encode())
+        await asyncio.wait_for(writer.drain(), timeout=timeout)
+
+        resp = await asyncio.wait_for(reader.read(256), timeout=timeout)
+        elapsed_ms = (time.monotonic() - start) * 1000
+
+        writer.close()
+        try:
+            await asyncio.wait_for(writer.wait_closed(), timeout=1)
+        except Exception:
+            pass
+
+        resp_text = resp.decode(errors="replace")
+        is_ws = "101" in resp_text and "websocket" in resp_text.lower()
+
+        if is_ws:
+            return {"status": "ok", "latency_ms": round(elapsed_ms, 1)}
+        else:
+            return {
+                "status": "unexpected",
+                "latency_ms": round(elapsed_ms, 1),
+                "detail": resp_text.split("\r\n")[0][:80],
+            }
+
+    except asyncio.TimeoutError:
+        elapsed_ms = (time.monotonic() - start) * 1000
+        return {"status": "timeout", "latency_ms": round(elapsed_ms, 1)}
+    except ConnectionRefusedError:
+        elapsed_ms = (time.monotonic() - start) * 1000
+        return {"status": "refused", "latency_ms": round(elapsed_ms, 1)}
+    except OSError as e:
+        elapsed_ms = (time.monotonic() - start) * 1000
+        return {"status": "error", "latency_ms": round(elapsed_ms, 1), "detail": str(e)[:80]}
+
+
+def write_log(result: dict):
+    """写一行日志"""
+    LOG_DIR.mkdir(parents=True, exist_ok=True)
+    now = datetime.now().strftime("%Y-%m-%d %H:%M:%S")
+    detail = result.get("detail", "")
+    line = f"{now} | {result['status']:12s} | {result['latency_ms']:8.1f}ms | {detail}\n"
+    with open(LOG_FILE, "a") as f:
+        f.write(line)
+    # 也打到 stdout
+    print(line.rstrip())
+
+
+def print_summary():
+    """打印统计摘要"""
+    if stats["total"] == 0:
+        return
+    avg_ms = stats["total_ms"] / stats["total"]
+    ok_rate = stats["ok"] / stats["total"] * 100
+    print(f"\n{'='*60}")
+    print(f"Gateway Monitor Summary")
+    print(f"{'='*60}")
+    print(f"Total probes:    {stats['total']}")
+    print(f"OK:              {stats['ok']} ({ok_rate:.1f}%)")
+    print(f"Fail:            {stats['fail']}")
+    print(f"Max consecutive: {stats['max_consecutive_fail']}")
+    print(f"Latency:         min={stats['min_ms']:.1f}ms avg={avg_ms:.1f}ms max={stats['max_ms']:.1f}ms")
+    print(f"Log:             {LOG_FILE}")
+
+
+async def main(host: str, port: int, interval: int):
+    print(f"Gateway Monitor started")
+    print(f"  Target:   {host}:{port}")
+    print(f"  Interval: {interval}s")
+    print(f"  Log:      {LOG_FILE}")
+    print(f"  Ctrl+C to stop\n")
+
+    running = True
+
+    def handle_signal(sig, frame):
+        nonlocal running
+        running = False
+        print("\nStopping...")
+
+    signal.signal(signal.SIGINT, handle_signal)
+    signal.signal(signal.SIGTERM, handle_signal)
+
+    while running:
+        result = await probe_gateway(host, port)
+
+        stats["total"] += 1
+        stats["total_ms"] += result["latency_ms"]
+
+        if result["status"] == "ok":
+            stats["ok"] += 1
+            stats["consecutive_fail"] = 0
+        else:
+            stats["fail"] += 1
+            stats["consecutive_fail"] += 1
+            if stats["consecutive_fail"] > stats["max_consecutive_fail"]:
+                stats["max_consecutive_fail"] = stats["consecutive_fail"]
+
+        if result["latency_ms"] < stats["min_ms"]:
+            stats["min_ms"] = result["latency_ms"]
+        if result["latency_ms"] > stats["max_ms"]:
+            stats["max_ms"] = result["latency_ms"]
+
+        write_log(result)
+
+        # 等 interval 秒，但提前退出
+        try:
+            await asyncio.sleep(interval)
+        except asyncio.CancelledError:
+            break
+
+    print_summary()
+
+
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser(description="Gateway 存活监控")
+    parser.add_argument("--host", default="127.0.0.1", help="Gateway host")
+    parser.add_argument("--port", type=int, default=18789, help="Gateway port")
+    parser.add_argument("--interval", type=int, default=10, help="探测间隔（秒）")
+    args = parser.parse_args()
+
+    try:
+        asyncio.run(main(args.host, args.port, args.interval))
+    except KeyboardInterrupt:
+        print_summary()