# Block PRs that add prd-new-*.md files directly to main.
#
# prd-new-*.md files are placeholders — they must go through a PR so
# the post-merge prd-number workflow can assign a sequential number and
# rename the file. A direct push or a PR that slips through without
# triggering the check would leave an un-numbered PRD on main.

name: prd-check

on:
  pull_request:
    branches:
      - main
    paths:
      - 'docs/prds/prd-new-*.md'

jobs:
  no-prd-new-on-main:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Fail if prd-new-*.md files are present in the diff
        run: |
          base="${{ github.event.pull_request.base.sha }}"
          head="${{ github.event.pull_request.head.sha }}"
          new_prds=$(git diff --name-only --diff-filter=A "$base" "$head" \
            | grep -E '^docs/prds/prd-new-.+\.md$' || true)
          if [ -n "$new_prds" ]; then
            echo "ERROR: PRs to main must not add prd-new-*.md files directly."
            echo "These files must be merged via a feature branch so the"
            echo "prd-number workflow can assign a sequential number on merge:"
            echo "$new_prds"
            exit 1
          fi
          echo "OK: no prd-new-*.md files added in this PR."