name: prd-number-check

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

jobs:
  require-numbered-prds:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Reject unnumbered PRDs
        run: |
          unnumbered=$(find docs/prds -maxdepth 1 -type f \
            -name 'prd-new-*.md' -print | sort)

          if [ -n "$unnumbered" ]; then
            echo "::error::Assign every new PRD its final sequential number before merge."
            echo "Unnumbered PRDs:"
            echo "$unnumbered"
            exit 1
          fi

          echo "All PRDs have final numbers."