name: Auto-close LLM PRs
on:
  pull_request_target:
    types: [opened]
permissions:
  contents: read
  pull-requests: write
jobs:
  close-llm-pr:
    name: Close PR if marked as LLM-written
    runs-on: ubuntu-latest
    steps:
      - name: Check PR body and close if LLM-written
        uses: actions/github-script@v6
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}
          script: |
            const marker = "This PR was written entirely using an LLM";
            const { owner, repo } = context.repo;
            const prNumber = context.payload.pull_request && context.payload.pull_request.number;
            if (!prNumber) {
              console.log('No pull request number found in context; exiting.');
              return;
            }
            const { data: pr } = await github.rest.pulls.get({ owner, repo, pull_number: prNumber });
            const body = pr.body || "";
            if (body.includes(marker)) {
              if (pr.state === 'closed') {
                console.log(`PR #${prNumber} already closed.`);
                return;
              }
              await github.rest.issues.addLabels({
                owner,
                repo,
                issue_number: prNumber,
                labels: ['spam']
              });
              await github.rest.issues.createComment({
                owner,
                repo,
                issue_number: prNumber,
                body: "Closing this PR because it contains the disclosure: \"This PR was written entirely using an LLM\"."
              });
              await github.rest.pulls.update({ owner, repo, pull_number: prNumber, state: 'closed' });
              console.log(`Closed PR #${prNumber} because marker was found.`);
            } else {
              console.log(`Marker not found in PR #${prNumber}; nothing to do.`);
            }