name: No Claude references

# Server-side counterpart to the global commit-msg hook: rejects a PR whose
# title, body, or commit messages mention "claude" (any case). Catches commits
# pushed with --no-verify and edits made in the GitHub UI. Only message text is
# checked — never file contents, since the code legitimately references claude.

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

permissions:
  contents: read

jobs:
  no-claude:
    runs-on: ubuntu-latest
    steps:
      - name: Check PR title and body
        env:
          TITLE: ${{ github.event.pull_request.title }}
          BODY: ${{ github.event.pull_request.body }}
        run: |
          if printf '%s\n%s' "$TITLE" "$BODY" | grep -qi 'claude'; then
            echo "::error::PR title or body mentions 'claude' — please remove it."
            exit 1
          fi

      - uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Check commit messages
        env:
          BASE_SHA: ${{ github.event.pull_request.base.sha }}
          HEAD_SHA: ${{ github.event.pull_request.head.sha }}
        run: |
          if git log --format='%B' "$BASE_SHA..$HEAD_SHA" | grep -qi 'claude'; then
            echo "::error::A commit message in this PR mentions 'claude'."
            exit 1
          fi