check_pull_request_title.yml

name: 'Check PR title'
on:
  pull_request:
    types: [edited, opened, synchronize, reopened]

jobs:
  pr-title-check:
    runs-on: ubuntu-latest
    if: ${{ github.event.pull_request.user.login != 'allcontributors[bot]' }}
    steps:
      # Echo the user's login
      - name: Echo user login
        run: echo ${{ github.event.pull_request.user.login }}
      - uses: naveenk1223/action-pr-title@master
        with:
          # Valid titles: "Do something"
          # Invalid title:
          # - "do something"
          # - "Do something."
          # - "Does something"
          # - "Do"
          regex: '^[A-Z][a-zA-Z]*(?<!s)( .+)+[^.]$'  # Thanks, ChatGPT
          min_length: 10
          max_length: 72