name: Branch Protection

on:
  pull_request:
    branches: [main]

jobs:
  check-branch:
    runs-on: ubuntu-latest
    steps:
      - name: Block docs branch merge to main
        if: github.head_ref == 'docs'
        run: |
          echo "::error::Merging 'docs' branch into 'main' is not allowed."
          echo ""
          echo "The 'docs' branch contains the documentation website which should"
          echo "remain separate from the main skill files to keep installations lightweight."
          echo ""
          echo "If you need to sync changes, cherry-pick specific commits instead."
          exit 1

      - name: Branch check passed
        if: github.head_ref != 'docs'
        run: echo "Branch check passed - not merging from docs branch"