pr_guard.yml

name: PR Guard

on:
  pull_request:
    branches: [main]

jobs:
  size-check:
    runs-on: ubuntu-latest
    steps:
      - name: Check PR size
        uses: actions/github-script@v7
        with:
          script: |
            const pr = context.payload.pull_request;
            const additions = pr.additions;
            const deletions = pr.deletions;
            const total = additions + deletions;

            const labels = pr.labels.map(l => l.name);
            if (labels.includes('large-pr-approved')) {
              core.info(`PR size check skipped — "large-pr-approved" label is present (${total} lines).`);
              return;
            }

            if (total > 600) {
              core.warning(
                `This PR changes ${total} lines (+${additions}/-${deletions}). ` +
                "Consider splitting it into smaller PRs for easier review."
              );
            }
            if (total > 3000) {
              core.setFailed(
                `PR is too large (${total} lines changed). ` +
                "Please split into smaller focused PRs. " +
                'Add the "large-pr-approved" label to bypass this check.'
              );
            }