Beam/.github/workflows/blocked.yml

name: Prevent blocked
on:
  pull_request:
    types: [opened, labeled, unlabeled]
jobs:
  prevent-blocked:
    name: Prevent blocked
    runs-on: ubuntu-latest
    permissions:
      pull-requests: read
    steps:
      - name: Add notice
        uses: actions/github-script@v7
        if: contains(github.event.pull_request.labels.*.name, 'X-Blocked')
        with:
          script: |
            core.setFailed("PR has been labeled with X-Blocked; it cannot be merged.");