Four read-only sub-agents review your git diff in parallel, each hunting a different class of problem: regressions against intent, security and privacy risks, performance and reliability issues, and contract or test coverage gaps. The main agent then filters out the noise and gives you a prioritized fix path without touching any files. Use it when you want a second set of eyes before merge and the diff is big enough that parallel review saves time. The strictly read-only design means you get findings and recommendations, not automatic edits, which is the right call when you're looking for issues you might have missed rather than a bot rewriting your code.
npx skills add https://github.com/dimillian/skills --skill review-swarm