What problem does it solve? After shipping code, project documentation drifts out of sync with reality. This Skill reads all project docs, cross-references the git diff, and updates README, ARCHITECTURE, CONTRIBUTING, and CLAUDE.md to match what actually shipped, surfacing documentation debt in the PR body. ## Core Features & Use Cases - Diataxis Coverage Mapping: Builds a coverage map across reference, how-to, tutorial, and explanation doc types to find gaps. - Doc Synchronization: Updates README, ARCHITECTURE, CONTRIBUTING, and CLAUDE.md against the shipped diff, and detects architecture diagram drift. - Release Hygiene: Polishes CHANGELOG voice with a sell-test rubric, cleans up TODOs, and optionally bumps VERSION. - Use Case: After merging a feature PR, ask the agent to sync the docs; it reviews the diff, rewrites stale sections, and reports remaining documentation debt. ## Quick Start Ask the agent to update the docs and sync documentation with what just shipped.