claude-code-review.yml

name: Claude Code Review

on:
  pull_request:
    types: [opened, synchronize, ready_for_review, reopened]
  issue_comment:
    types: [created]
  pull_request_review_comment:
    types: [created]
  pull_request_review:
    types: [submitted]

permissions:
  contents: read
  pull-requests: write
  issues: read
  id-token: write

jobs:
  review:
    if: |
      (github.event_name == 'pull_request' && github.event.pull_request.draft == false && github.event.pull_request.merged == false) ||
      (github.event_name == 'issue_comment' && github.event.issue.pull_request && contains(github.event.comment.body, '@claude')) ||
      (github.event_name == 'pull_request_review_comment' && contains(github.event.comment.body, '@claude')) ||
      (github.event_name == 'pull_request_review' && contains(github.event.review.body, '@claude'))
    concurrency:
      group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.event.issue.number || github.run_id }}
      cancel-in-progress: ${{ github.event_name == 'pull_request' }}
    runs-on: ubuntu-latest
    steps:
      - name: Resolve PR number
        id: pr
        run: |
          if [ "${{ github.event_name }}" = "issue_comment" ]; then
            echo "number=${{ github.event.issue.number }}" >> "$GITHUB_OUTPUT"
          else
            echo "number=${{ github.event.pull_request.number }}" >> "$GITHUB_OUTPUT"
          fi

      - name: Checkout repository
        uses: actions/checkout@v7
        with:
          ref: refs/pull/${{ steps.pr.outputs.number }}/head
          fetch-depth: 0

      - name: Fetch PR diff
        env:
          GH_TOKEN: ${{ github.token }}
        run: |
          gh pr diff "${{ steps.pr.outputs.number }}" > /tmp/pr-diff.patch

      - name: Fetch previous reviews
        env:
          GH_TOKEN: ${{ github.token }}
        run: |
          PR_NUM="${{ steps.pr.outputs.number }}"
          REPO="${{ github.repository }}"
          {
            echo "=== Review Summaries ==="
            gh api "repos/${REPO}/pulls/${PR_NUM}/reviews" --paginate \
              --jq '.[] | select(.state != "PENDING") | "[\(.user.login)] \(.state)\n\(.body)\n---"' 2>/dev/null || true

            echo ""
            echo "=== Inline Review Comments ==="
            gh api "repos/${REPO}/pulls/${PR_NUM}/comments" --paginate \
              --jq '.[] | "[\(.user.login)] \(.path):\(.line // .original_line)\n\(.body)\n---"' 2>/dev/null || true

            echo ""
            echo "=== PR Conversation Comments ==="
            gh api "repos/${REPO}/issues/${PR_NUM}/comments" --paginate \
              --jq '.[] | "[\(.user.login)]\n\(.body)\n---"' 2>/dev/null || true
          } > /tmp/previous-reviews.txt

      - name: Build review prompt
        id: prompt
        run: |
          DELIMITER="PROMPT_EOF_$(uuidgen)"
          {
            echo "REVIEW_PROMPT<<${DELIMITER}"
            for f in CLAUDE.md AGENTS.md; do
              if [ -f "$f" ]; then
                cat "$f"
                echo ""
              fi
            done
            if [ -f ".claude/review-prompt.md" ]; then
              cat .claude/review-prompt.md
            fi
            echo "${DELIMITER}"
          } >> "$GITHUB_OUTPUT"

      - name: Resolve claude_args
        id: args
        env:
          MODEL: ${{ vars.CLAUDE_REVIEW_MODEL }}
        run: |
          ALLOWED_TOOLS='Read,Glob,Grep,mcp__github_inline_comment__create_inline_comment,Bash(gh pr comment:*),Bash(gh pr view:*)'
          if [ -n "$MODEL" ]; then
            echo "value=--model ${MODEL} --max-turns 10 --allowedTools \"${ALLOWED_TOOLS}\"" >> "$GITHUB_OUTPUT"
          else
            echo "value=--max-turns 10 --allowedTools \"${ALLOWED_TOOLS}\"" >> "$GITHUB_OUTPUT"
          fi

      - name: Claude Code Review
        continue-on-error: true
        uses: anthropics/claude-code-action@v1
        with:
          anthropic_api_key: ${{ secrets.ANTHROPIC_API_KEY }}
          allowed_bots: "custom-ink-triton"
          prompt: |
            You are reviewing PR #${{ steps.pr.outputs.number }}.
            The full diff is in /tmp/pr-diff.patch — Read that file first.
            Previous review comments are in /tmp/previous-reviews.txt — Read that file next.
            Do NOT run gh pr diff or git diff to re-fetch it.
            Use Read on source files if you need more context beyond the diff.

            IMPORTANT: Do NOT repeat or reiterate feedback that has already been given
            in previous reviews. If a prior reviewer (human or bot) already flagged an
            issue and the author has not addressed it in the current diff, you may
            reference it briefly but do not re-explain. Focus your review on NEW issues
            not covered by prior feedback.

            Post inline review comments and stop.

            Review this pull request using the following guidelines:

            ${{ steps.prompt.outputs.REVIEW_PROMPT }}
          claude_args: "${{ steps.args.outputs.value }}"