How do I auto-generate release notes from conventional commits?

Slash-command body: "Read git log v$(git describe --tags --abbrev=0)..HEAD --format=%s. Group by Conventional Commit type (feat, fix, perf, refactor, docs, chore). For each feat and fix, write a one-line user-facing description — not the commit subject, the impact. Output as Markdown with a ## Breaking changes section first if any commit body contains BREAKING CHANGE:." Combine with semantic-release for auto-tagging. Two minutes per release versus thirty manual.