chore(backlog): 记录 g155 完成

.ua/backlog.json

@@ -1603,7 +1603,7 @@
       "motivation": "Agent 常只读 llms.txt 速览，但速览里完全没有配方入口；同时 cli 包导出描述里只写了 3 个 MCP 工具，与实际的 6 个不符。",
       "acceptance": "ua index 在 llms.txt 末尾输出配方目录（id / 标题 / 要点数）并指明三种取法；cli 清单的 mcp 导出描述与 MCP_TOOL_NAMES 一致。",
       "notes": "",
-      "status": "open"
+      "status": "done"
     }
   ]
 }

.ua/iterations.log

@@ -199,3 +199,4 @@
 {"ts":"2026-10-26T15:52:38+08:00","id":"g152","result":"done","commit":"bc984ae","summary":"ua list --components 出 67 组件全览"}
 {"ts":"2026-10-26T15:53:22+08:00","id":"g153","result":"done","commit":"0609175","summary":"ua search 多词 AND 与未命中退出码 1"}
 {"ts":"2026-10-26T15:54:06+08:00","id":"g154","result":"done","commit":"ab758ab","summary":"MCP search_components 返回组件级命中"}
+{"ts":"2026-10-26T15:55:14+08:00","id":"g155","result":"done","commit":"a3ece11","summary":"llms.txt 输出配方目录，修正 MCP 工具描述"}