name: PR Title Lint

on:
  pull_request:
    types: [opened, edited, synchronize, reopened, ready_for_review]

jobs:
  lint-pr-title:
    name: "Check PR title format"
    runs-on: warp-ubuntu-2404-x64-2x
    permissions:
      contents: read
    if: github.event_name == 'pull_request' || github.event_name == 'merge_group'
    steps:
      - uses: amannn/action-semantic-pull-request@48f256284bd46cdaab1048c3721360e808335d50 # v6.1.1
        with:
          types: |
            feat
            fix
            chore
            docs
            style
            refactor
            perf
            test
            build
            ci
            revert
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

  check-pr-title-type:
    name: "Validate title type matches changes"
    runs-on: warp-ubuntu-2404-x64-2x
    permissions:
      contents: read
      pull-requests: write
      issues: read
      id-token: write
    if: github.event_name == 'pull_request' && !github.event.pull_request.draft
    steps:
      - name: Checkout repository
        uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8
        with:
          fetch-depth: 1
          persist-credentials: false

      - name: Build prompt with PR title and changed files
        id: build-prompt
        env:
          PR_TITLE: ${{ github.event.pull_request.title }}
          PR_NUMBER: ${{ github.event.pull_request.number }}
          GH_TOKEN: ${{ github.token }}
        run: |
          FILES=$(gh pr diff "$PR_NUMBER" --name-only)
          DELIM="PROMPT_EOF_$(uuidgen)"
          {
            echo "TITLE_CHECK_PROMPT<<$DELIM"
            printf 'PR TITLE: %s\n' "$PR_TITLE"
            printf 'PR NUMBER: %s\n' "$PR_NUMBER"
            echo ""
            echo "CHANGED FILES:"
            echo "$FILES"
            echo ""
            cat .github/prompts/pr-title-check.prompt.md
            echo "$DELIM"
          } >> "$GITHUB_ENV"

      - name: Validate title type matches changes
        env:
          GH_TOKEN: ${{ github.token }}
        uses: anthropics/claude-code-action@6062f3709600659be5e47fcddf2cf76993c235c2 #v1.0.76
        with:
          anthropic_api_key: ${{ secrets.ANTHROPIC_API }}
          prompt: ${{ env.TITLE_CHECK_PROMPT }}
          claude_args: '--model claude-haiku-4-5 --allowed-tools "Bash(gh pr comment:*)"'