changelog

name	changelog
description	Auto-generate changelog from git history

When this skill is invoked, IMMEDIATELY print:

[BW] generating changelog...

1. Read git log since the last tag (or --all if no tags)
2. Group by conventional commit type: feat, fix, perf, refactor, docs, chore, test
3. Output formatted changelog

After done, print:

[BW] changelog generated. {N} entries since {tag/ref}.