Editor-side TeamCreate system for s&box that lets creators host or join collaborative editing and shared play from within the editor. It runs a local or relayed TCP/WebSocket transport with AEAD framing, does file and scene diff/sync with a content-addressed blob store, and drives UI for hosting, joining, readiness and relay setup including Cloudflare Worker deployment or a pinned cloudflared quick-tunnel. It also includes solo test tooling that can spin up a disposable project copy, bots, and a spectator view for playback.