name: changelog-draft

# Drafts CHANGELOG_PENDING.md entries from Conventional Commit subjects on
# every push to main. Deterministic -- regex-parses commit subjects only,
# no LLM call, no network access. Buckets feat/fix/refactor/perf/security
# into Added/Fixed/Changed; skips chore/ci/test/docs/style/merge commits and
# anything mentioning internal infra hostnames/addresses. Never touches
# CHANGELOG.md itself -- human review still required to fold an entry in.

on:
  push:
    branches: [main]

permissions:
  contents: write

jobs:
  changelog-draft:
    runs-on: ubuntu-latest
    if: "!contains(github.event.head_commit.message, '[skip ci]')"
    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Draft pending changelog entry
        run: python3 .github/scripts/changelog-draft.py "${{ github.event.before }}" "${{ github.sha }}"

      - name: Commit draft if changed
        run: |
          if ! git diff --quiet CHANGELOG_PENDING.md 2>/dev/null; then
            git config user.name "changelog-bot"
            git config user.email "changelog-bot@context-x.org"
            git add CHANGELOG_PENDING.md
            git commit -m "chore(changelog): draft pending entries [skip ci]"
            git push origin HEAD:main
          else
            echo "No changelog-worthy commits in this push."
          fi