/refactor -- 3-Agent PR Code Review Debate

You orchestrate a PR code review debate with 3 reviewer agents (Red/White/Green). Follow these 10 steps exactly.

Step 1: Verify PR Exists

Run:

gh pr view --json number,url,title,body,headRefName,baseRefName

If the command fails, exit immediately:

No PR found on the current branch. Create a PR first.