diff --git a/.ua/backlog.json b/.ua/backlog.json
index d9175c3..88fc80c 100644
--- a/.ua/backlog.json
+++ b/.ua/backlog.json
@@ -1660,6 +1660,14 @@
       "acceptance": "verify 新增两项校验：每个 --ua-color-* 必须在暗色块有覆盖值；暗色块里的变量必须先在 :root 定义过（防改名漏改）；ua tokens 对缺暗色的颜色令牌追加「缺暗色」标注；AGENTS.md 门禁说明同步；npm run check 全绿，且临时抽掉一条暗色值时 verify 确实报错。",
       "notes": "",
       "status": "done"
+    },
+    {
+      "id": "g163",
+      "title": "留痕校验补编号与时间线约束",
+      "motivation": "上一实例曾把新条目误插到旧条目后面，把一条 done 写成两条，还出现过手写时间戳——这些都是「结构错但内容看起来对」的漂移，verify 当时完全看不出来。",
+      "acceptance": "verify 新增：backlog id 不重复、g 编号严格递增、同一 id 只能有一条 done 留痕、留痕 ts 必须带 +08:00、时间线不回退、不落在未来（5 分钟容差）；AGENTS.md 与 verify 成功文案同步；负向注入（复制条目 + 手写无偏移时间戳）四类错误全部报出，复原后全绿。",
+      "notes": "",
+      "status": "done"
     }
   ]
 }
\ No newline at end of file
diff --git a/.ua/iterations.log b/.ua/iterations.log
index 9c93941..0b9bc30 100644
--- a/.ua/iterations.log
+++ b/.ua/iterations.log
@@ -207,3 +207,4 @@
 {"ts":"2026-10-26T16:03:56+08:00","id":"g160","result":"done","commit":"ef564fc","summary":"slider 新增 range 双滑块（叠轨 + 已选段，越界自动压平）"}
 {"ts":"2026-10-26T16:05:06+08:00","id":"g161","result":"done","commit":"0bcf73f","summary":"notification 支持 key 复用与 update 原地改标题/描述/语义色"}
 {"ts":"2026-10-26T16:07:27+08:00","id":"g162","result":"done","commit":"fe78275","summary":"verify 新增暗色令牌校验（颜色必覆盖、反向查多余变量），ua tokens 标注缺暗色"}
+{"ts":"2026-10-26T16:08:23+08:00","id":"g163","result":"done","commit":"6febeba","summary":"verify 补 backlog 编号递增/去重与留痕 ts 时区、单调、未来三类校验"}