Add automated PR review workflow with /review command

[derekmisler]

🤖 Add AI-Powered PR Review Workflow

This PR introduces an automated PR review workflow that can be triggered via comment commands or manually through the GitHub Actions UI.

Features

✨ Comment-triggered reviews: Simply comment /review on any PR to trigger an automated AI review
🎯 Manual dispatch: Run reviews on-demand from the GitHub Actions UI for any PR number
🔒 Secure: Uses minimal permissions (read-only content access) and proper secret handling
👀 Visual feedback: Adds emoji reactions (👀 → 🚀/😕) to show workflow progress

How It Works

1. Trigger: Comment /review on a PR or manually trigger from Actions tab
2. Validation: Workflow verifies the trigger is from a PR (not just any issue)
3. Checkout: Fetches the PR branch and details
4. Review: Runs the cagent PR reviewer agent using Claude AI
5. Feedback: Adds reactions and posts review results

Usage

On a Pull Request:

/review

From GitHub UI:

1. Go to Actions → "PR Review on Command"
2. Click "Run workflow"
3. Enter the PR number
4. Click "Run workflow"

Security

• ✅ Minimal permissions (contents: read, pull-requests: write, issues: write)
• ✅ Actions pinned to specific versions/SHAs
• ✅ Secrets properly handled (ANTHROPIC_API_KEY, GITHUB_TOKEN)
• ✅ Only runs on explicit triggers (no automatic execution)
• ✅ Uses official GitHub actions and verified Docker action

Technical Details

• Workflow file: .github/workflows/pr-review-command.yml
• Agent: agentcatalog/github-action-pr-reviewer:2.0.0
• Required secrets: ANTHROPIC_API_KEY (already configured)
• Runner: ubuntu-latest

Testing Plan

After merge, this can be tested by:

1. Creating a new test PR
2. Commenting /review on it
3. Verifying the AI reviewer provides feedback

[derekmisler]

/review