Band Code Review — Multi-Agent PR Review Desk

Band Code Review is a multi-agent system where four specialized AI agents collaborate through Band Protocol to review pull requests. When a developer submits a diff (via paste, GitHub URL, or connected account), the pipeline creates a Band room and runs through four stages: Planner (gpt-4.1-nano) analyzes the PR scope, builds a review checklist, identifies risk areas, and flags security-sensitive code. Reviewer (claude-sonnet-4-6) inspects the code file by file, producing findings with severity ratings, category classification, line references, and actionable fix suggestions. Security Reviewer (qwen3-coder-480b) is recruited dynamically via Band's lookup_peers mechanism — only when the Planner flags security concerns. Performs CWE-aware deep audit. Reporter (claude-sonnet-4-6) compiles all findings into a final report with merge verdict (BLOCK / REQUEST CHANGES / APPROVE). Band is the actual coordination layer — every handoff, room state, peer discovery, and context exchange streams through Band's protocol. The UI shows real-time SSE events as agents collaborate. Built for the Band of Agents Hackathon (Track 2), powered by AI/ML API. Supports GitHub/GitLab PR fetching, PAT-based account connection, and GitHub OAuth.