Maintain Changelog

Derive release facts and public API impact from source, manifests, commits, issues, and tags. Read changelog and SemVer guidance.

Read the validator contracts before running the changelog validator for changed changelogs and the SemVer validator for candidate versions. Direct inputs must be SemVer without a v; --from-tags recognizes v only as a Git-tag wrapper. The changelog checker applies a documented Keep a Changelog + SemVer profile; do not impose it on unrelated release-note formats.

Preserve published version numbers, dates, and useful history. Verify comparison links, release facts, migration notes, and the declared public API impact.