隔离故障
先测量问题。基于最后一项排序键使用游标，使新数据在请求间到达时第二页不跳过或重复项。 最常见的错误是未确认门禁能捕获你关心的问题就先加上。在接入 CI 之前，先对当前代码库运行 SELECT * FROM items WHERE (created_at, id) < ($cursor_ts, $cursor_id) ORDER BY created_at DESC, id DESC LIMIT 20; 并检查输出。
SELECT * FROM items WHERE (created_at, id) < ($cursor_ts, $cursor_id) ORDER BY created_at DESC, id DESC LIMIT 20;验证优雅降级
门禁就位后，让失败可操作。SELECT * FROM items WHERE (created_at, id) < ($cursor_ts, $cursor_id) ORDER BY created_at DESC, id DESC LIMIT 20; 失败时应指向具体文件和行号，而非泛泛的错误。在锁文件中固定工具版本，防止上游发布悄悄改变行为。每次拉取请求都应像审查测试结果一样审查门禁输出。
验证
在本地运行 SELECT * FROM items WHERE (created_at, id) < ($cursor_ts, $cursor_id) ORDER BY created_at DESC, id DESC LIMIT 20; 确认通过后推送。CI 中门禁应阻断不合规的拉取请求。若人为绕过门禁直接推送，应在下次定期扫描中被发现。
注意事项
- The gate only runs on events that trigger the workflow; locally pushed commits bypass it.
- Configuration drift is possible if someone edits settings outside version control.