name: Greptile PR reminder

# One-time nudge when a PR is opened or reopened. Uses pull_request_target so the token can
# comment on PRs from forks. Does not checkout the PR head — only posts a static reminder (see
# SECURITY: pull_request_target guidance in GitHub Actions docs).
on:
  pull_request_target:
    types: [opened, reopened]

permissions:
  contents: read
  pull-requests: write

jobs:
  remind:
    name: Post Greptile review reminder
    runs-on: ubuntu-latest
    if: github.event.pull_request.user.type != 'Bot'
    steps:
      - name: Comment with Greptile guidance
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
          BASE_REF: ${{ github.event.pull_request.base.ref }}
          PR_NUMBER: ${{ github.event.pull_request.number }}
        run: |
          set -euo pipefail
          base_ref="${BASE_REF}"
          contributing_url="${GITHUB_SERVER_URL}/${GITHUB_REPOSITORY}/blob/${base_ref}/CONTRIBUTING.md#greptile-code-review"
          pr="${PR_NUMBER}"
          repo="${GITHUB_REPOSITORY}"
          {
            echo '### Greptile code review'
            echo ''
            echo "This repo uses **Greptile** for automated review. Before merge, aim for **Confidence Score: 5/5** with **zero unresolved** review threads — see [CONTRIBUTING.md](${contributing_url})."
            echo ''
            echo '**Run a review** — add a PR comment with:'
            echo ''
            echo '```'
            echo '@greptile review'
            echo '```'
            echo ''
            echo 'Give it **~5-10 minutes** (sometimes longer) for results, then fix feedback and re-trigger until you reach **Confidence Score: 5/5**.'
            echo ''
            echo '**Optional:** automate with the [greploop skill](https://skills.sh/greptileai/skills/greploop).'
          } > comment.md
          gh pr comment "$pr" --repo "$repo" --body-file comment.md