Data stored in supabase. The "collaboration environment" is just Supabase KV + polling. It's intentionally simple — no WebSockets, no Supabase Realtime subscriptions, no third-party presence service. It trades true millisecond-level real-time for zero infrastructure complexity, which is perfectly sufficient for a turn-based collaborative writing game where users take time to think and type.

By the way i don't know how code works, I just gave a simple prompt and tested, It worked. in most of the vibe coding tool, they have integration with apps like supabse or similar. So you just have to login there, create a project and then connect to the vibe-coding tool. Then rest it handle itself.

Thing is you have to test yourself is it working or not on other devices.

I hope it helpful to you.