What problem does it solve? After shipping code, project documentation often drifts out of sync with what actually changed. This Skill audits README, ARCHITECTURE, CONTRIBUTING, CHANGELOG, and other docs against the release diff, then updates them so the docs reflect what shipped. ## Core Features & Use Cases - Diataxis coverage mapping: Cross-references the diff against docs to find features missing reference, how-to, tutorial, or explanation coverage, and surfaces documentation debt in the PR body. - Per-file audit and safe updates: Applies factual auto-updates (paths, counts, tables) directly while asking the user before narrative or risky changes, and polishes CHANGELOG voice without ever rewriting entries. - Cross-doc consistency and release hygiene: Checks version alignment, diagram drift, TODOS cleanup, optional VERSION bumps, and commits changes with an updated PR body and title. - Use Case: After merging a feature branch, run this Skill to sync all docs with the shipped diff, polish the CHANGELOG, and append a documentation health summary to the PR. ## Quick Start Ask the agent to update the project documentation to match what shipped on this branch.