Claude Squad is a self-hosted multiplayer coding tool. Your whole team shares one session, each person connects their local Claude Code as an agent with one command. You describe what to build, an orchestrator splits it into parallel tasks, agents run simultaneously on separate branches, then everything auto-merges into one PR. Token cost divides across everyone who joined. MIT licensed, runs on free-tier infra (Vercel + Supabase + Partykit). Your API keys never leave your machine.