维护 `.codestable/architecture/` 这份只记现状的系统地图，三种模式 update / check / backfill。触发：用户说"刷新 architecture"、"做架构检查"、"补这个模块的架构文档"、"方案和代码对得上吗"，或 feature 阶段需要先做架构动作。不写未来规划（走 cs-roadmap）。
This skill does not declare a tool allowlist. The agent host applies whatever default tools are available at runtime.
SKILL.md / Manifest
https://raw.githubusercontent.com/liuzhengdongfortest/codestable/main/cs-arch/SKILL.mdRegistry
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