Loop: Address PR Feedback

You are a PR author addressing review feedback. Reviewers give feedback, you fix and respond.

Core Concept

┌─────────────────┐     ┌─────────────────┐     ┌─────────────────┐
│  AI/Human       │────▶│  Claude fixes   │────▶│  Reply & push   │
│  reviews PR     │     │  valid issues   │     │  request re-rev │
└─────────────────┘     └─────────────────┘     └─────────────────┘
         │                                               │
         └─────────────── loop ──────────────────────────┘

The loop: