name: Claude Code

# Label-triggered code-review requests use pull_request_target so the workflow
# runs as defined on the default branch, which allows access to secrets for
# posting review comments on fork PRs. SECURITY: PR checkouts pin the fork's
# HEAD SHA (not the branch name) to prevent TOCTOU races.
# The claude-code-action sandboxes execution; it does not run arbitrary code
# from the checked-out source.

on:
  issue_comment:
    types: [created]
  pull_request_target:
    types: [labeled]
  pull_request_review_comment:
    types: [created]
  issues:
    types: [opened, assigned]
  pull_request_review:
    types: [submitted]

# Concurrency convention: see CONTRIBUTING.md → "GitHub Actions — Concurrency Convention".
# Serialize per-PR/issue to avoid racing comments.
concurrency:
  group: ${{ github.workflow }}-${{ github.event.issue.number || github.event.pull_request.number || github.event.issue.id }}
  cancel-in-progress: false

jobs:
  claude:
    if: |
      (
        github.event_name == 'issue_comment' &&
        (
          contains(github.event.comment.body, '@claude') ||
          (github.event.issue.pull_request && contains(github.event.comment.body, '/review'))
        ) &&
        (github.event.comment.author_association == 'OWNER' ||
         github.event.comment.author_association == 'MEMBER' ||
         github.event.comment.author_association == 'COLLABORATOR')
      ) ||
      (
        github.event_name == 'pull_request_review_comment' &&
        contains(github.event.comment.body, '@claude') &&
        (github.event.comment.author_association == 'OWNER' ||
         github.event.comment.author_association == 'MEMBER' ||
         github.event.comment.author_association == 'COLLABORATOR')
      ) ||
      (
        github.event_name == 'pull_request_review' &&
        contains(github.event.review.body, '@claude') &&
        (github.event.review.author_association == 'OWNER' ||
         github.event.review.author_association == 'MEMBER' ||
         github.event.review.author_association == 'COLLABORATOR')
      ) ||
      (
        github.event_name == 'issues' &&
        (contains(github.event.issue.body, '@claude') || contains(github.event.issue.title, '@claude')) &&
        (github.event.issue.author_association == 'OWNER' ||
         github.event.issue.author_association == 'MEMBER' ||
         github.event.issue.author_association == 'COLLABORATOR')
      ) ||
      (
        github.event_name == 'pull_request_target' &&
        github.event.label.name == 'claude-review' &&
        github.event.pull_request.draft == false &&
        (github.event.pull_request.author_association == 'OWNER' ||
         github.event.pull_request.author_association == 'MEMBER' ||
         github.event.pull_request.author_association == 'COLLABORATOR')
      )
    runs-on: ubuntu-latest
    timeout-minutes: 30
    permissions:
      contents: read
      pull-requests: write
      issues: write
      id-token: write
      actions: read # required for Claude to read CI results on PRs
    steps:
      # For PR-related triggers, resolve the fork repo so we can checkout correctly.
      - name: Resolve PR context
        id: pr
        uses: actions/github-script@3a2844b7e9c422d3c10d287c895573f7108da1b3 # v7
        with:
          script: |
            // Determine if this event is PR-related
            let pr = null;
            if (context.eventName === 'issue_comment' && context.payload.issue.pull_request) {
              const resp = await github.rest.pulls.get({
                owner: context.repo.owner,
                repo: context.repo.repo,
                pull_number: context.payload.issue.number,
              });
              pr = resp.data;
            } else if (context.eventName === 'pull_request_review_comment') {
              pr = context.payload.pull_request;
            } else if (context.eventName === 'pull_request_review') {
              pr = context.payload.pull_request;
            } else if (context.eventName === 'pull_request_target') {
              pr = context.payload.pull_request;
            }

            if (!pr) {
              core.setOutput('is_pr', 'false');
              return;
            }

            core.setOutput('is_pr', 'true');
            core.setOutput('number', String(pr.number));
            core.setOutput('sha', pr.head.sha);
            core.setOutput('repo', pr.head.repo.full_name);
            core.setOutput('branch', pr.head.ref);

      - name: Resolve Claude mode
        id: mode
        uses: actions/github-script@3a2844b7e9c422d3c10d287c895573f7108da1b3 # v7
        with:
          script: |
            const body = (context.payload.comment?.body ?? '').toLowerCase();
            const isCodeReview =
              (context.eventName === 'pull_request_target' &&
                context.payload.label?.name === 'claude-review') ||
              (context.eventName === 'issue_comment' &&
                Boolean(context.payload.issue?.pull_request) &&
                body.includes('/review'));

            core.setOutput('code_review', isCodeReview ? 'true' : 'false');

      - name: Checkout repository
        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
        with:
          repository: ${{ steps.pr.outputs.is_pr == 'true' && steps.pr.outputs.repo || github.repository }}
          ref: ${{ steps.pr.outputs.is_pr == 'true' && steps.pr.outputs.sha || '' }}
          fetch-depth: 1

      - name: Run Claude Code
        if: steps.mode.outputs.code_review != 'true'
        id: claude
        uses: anthropics/claude-code-action@9469d113c6afd29550c402740f22d1a97dd1209b # v1
        with:
          claude_code_oauth_token: ${{ secrets.CLAUDE_CODE_OAUTH_TOKEN }}
          github_token: ${{ secrets.GITHUB_TOKEN }}
          allowed_non_write_users: '*'
          show_full_output: true

          # This is an optional setting that allows Claude to read CI results on PRs
          additional_permissions: |
            actions: read

      - name: Run Claude Code Review
        if: steps.mode.outputs.code_review == 'true'
        id: claude-review
        uses: anthropics/claude-code-action@9469d113c6afd29550c402740f22d1a97dd1209b # v1
        with:
          claude_code_oauth_token: ${{ secrets.CLAUDE_CODE_OAUTH_TOKEN }}
          github_token: ${{ secrets.GITHUB_TOKEN }}
          allowed_non_write_users: '*'
          show_full_output: true
          plugin_marketplaces: 'https://github.com/anthropics/claude-code.git'
          plugins: 'code-review@claude-code-plugins'
          prompt: '/code-review:code-review ${{ github.repository }}/pull/${{ steps.pr.outputs.number }}'