release-check Validates release readiness before creating a release. Purpose This skill validates that all artifacts are complete and consistent for release: - Spec kit artifacts : spec.md, plan.md, tasks.md exist and are complete - Documentation : README.md, CHANGELOG.md have required sections - Versioning : Version numbers are consistent across package.json and CHANGELOG - API docs : API documentation matches contract specifications Output The skill outputs a ReleaseChecklist with: - Overall readiness status (Ready/Not Ready) - Individual check items with pass/fail/skip status - Version con…