From 4e10ca9ab19ec3c00911ab7587d4b4cb67333196 Mon Sep 17 00:00:00 2001
From: xxm <xxm@mofin.local>
Date: Mon, 10 Aug 2026 15:18:08 +0800
Subject: [PATCH] =?UTF-8?q?feat:=20candidate=5Ffilter=20=E5=8A=A0=E5=8D=95?=
 =?UTF-8?q?=E4=BE=8B=E5=AE=88=E5=8D=AB=EF=BC=88=E8=A7=84=E8=8C=835.3?=
 =?UTF-8?q?=EF=BC=89?=
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---
 deploy/profile-scripts/candidate_filter.py | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/deploy/profile-scripts/candidate_filter.py b/deploy/profile-scripts/candidate_filter.py
index fe8b981a..d5fc1a52 100644
--- a/deploy/profile-scripts/candidate_filter.py
+++ b/deploy/profile-scripts/candidate_filter.py
@@ -373,6 +373,15 @@ def stage5_fundamental(code, name, price):
 # ── 主流程 ──
 
 def main():
+    # ── 单例守卫（规范5.3，2026-08-10）──
+    import fcntl
+    lock_f = open("/tmp/candidate_filter.lock", "w")
+    try:
+        fcntl.flock(lock_f, fcntl.LOCK_EX | fcntl.LOCK_NB)
+    except OSError:
+        print("[FILTER] 已有实例在运行，退出")
+        return
+
     stage_filter = None
     single_code = None
     for i, arg in enumerate(sys.argv[1:]):