name: Claude Code Review

on:
  pull_request:
    # opened/reopened/ready_for_review -> first auto review
    # synchronize                      -> auto re-review on new pushes
    #
    # NOTE: pull_request (not _target) means fork PRs get a read-only GITHUB_TOKEN
    # and NO repository secrets (CLAUDE_CODE_OAUTH_TOKEN), so they cannot be
    # auto-reviewed. The job condition below skips them cleanly -> use @claude on
    # those. Same-repo branches (yours or write-access contributors) auto-review.
    types: [opened, synchronize, reopened, ready_for_review]

concurrency:
  group: claude-review-${{ github.event.pull_request.number }}
  cancel-in-progress: true

jobs:
  claude-review:
    # Skip drafts, and skip fork PRs (no secrets -> would only fail noisily)
    if: >
      github.event.pull_request.draft == false &&
      github.event.pull_request.head.repo.full_name == github.repository
    runs-on: ubuntu-latest
    permissions:
      contents: read
      pull-requests: write
      issues: write # Claude posts the review comment via the issues API
      id-token: write
      actions: read # Required for Claude to read CI results on PRs

    steps:
      - name: Checkout repository
        uses: actions/checkout@v6
        with:
          fetch-depth: 1

      - name: Run Claude Code Review
        id: claude-review
        uses: anthropics/claude-code-action@v1
        with:
          claude_code_oauth_token: ${{ secrets.CLAUDE_CODE_OAUTH_TOKEN }}
          # Allow claude[bot]'s own pushes to be handled gracefully (skip) instead
          # of erroring out the workflow
          allowed_bots: 'claude'
          # Pairs with the actions: read permission so Claude can read CI results
          additional_permissions: |
            actions: read
          plugin_marketplaces: 'https://github.com/anthropics/claude-code.git'
          plugins: 'code-review@claude-code-plugins'
          # Post/update a single summary comment every run, so a clean review
          # ("no issues found") is still visible instead of posting nothing.
          use_sticky_comment: true
          # --comment makes the code-review command post its findings to the PR.
          # Without it the command only prints the review to the Actions log.
          prompt: '/code-review:code-review ${{ github.repository }}/pull/${{ github.event.pull_request.number }} --comment'
          # The headless review was blocked on two tools: compound Bash pipelines
          # (sed/python/grep) and Write (it dropped a check_headings.py helper to
          # inspect the diff). Default permission mode gates both; Read/Grep/Glob/
          # Task already run un-prompted. Allowlist them. Safe here (unlike
          # claude.yml's fork-exposed @claude job): same-repo-only + contents:read
          # token, so any write is ephemeral and nothing can be pushed.
          claude_args: |
            --max-turns 50
            --model claude-opus-5
            --effort high
            --allowedTools Bash,Write
          # See https://github.com/anthropics/claude-code-action/blob/main/docs/usage.md