changelog-composer

Generates structured changelogs and release notes from git history and PR descriptions. Classifies changes into breaking, features, fixes, performance, and docs. Filters internal-only changes, detects breaking changes, and produces human-readable entries linked to source PRs. Triggers on: "generate changelog", "write release notes", "compose changelog", "what changed since", "changes since last release", "prepare release", "release notes for", "changelog for", "summarize changes", "diff since tag". Use this skill when preparing a release and needing to summarize changes for users.