The code reviewer prompt was minimal and didn't specify worktree setup, causing parallel reviewers to interfere with each other by checking out different branches in the same directory. Changes: - Add worktree setup/cleanup to code reviewer prompt (like issue-worker/fixer) - Add branch tracking to issue state - Add note about passing branch name to reviewers - Expand reviewer prompt with full review process This ensures each reviewer works in isolation at: ../<repo>-review-<pr-number> Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>