Persists codebase context as per-folder CLAUDE.md notes plus a root pointer-index, so future sessions get oriented without re-reading the whole repo. **Use proactively** whenever the user describes how a folder/module/file works, states a project-wide convention or rule, or asks to "document this fo
Persists codebase context as per-folder CLAUDE.md notes plus a root pointer-index, so future sessions get oriented without re-reading the whole repo. **Use proactively** whenever the user describes how a folder/module/file works, states a project-wide convention or rule, or asks to "document this folder", "add a rule", "save this to CLAUDE.md", or "remember this for next time". Prefer this skill o