docs

The bokendell docs contract: where docs live, how to find the right one cheaply, when to update them, and how to distill planning docs on ship. Use when the user says "update the docs", "where does this doc go", "archive this project", "distill", "docs map", mentions MAP.md, or whenever creating/restructuring documentation in any bokendell repo. Also use when the docs-freshness hook reports stale owning docs. Spec lives at docs/planning/docs-context-layer/design.md in the golf repo.