Live Collaboration Room
Spin up a room, share the link, and watch it come alive: everyone's cursor moves in real time, a shared notepad syncs as you type, and reactions burst across the screen. No signup, nothing stored - it's all live over WebSockets.
Why it's here
Real-time, many-to-many systems are hard - and they're my specialty. This room is a small, honest demo of it: a single Fastify WebSocket server holds ephemeral room state in memory and fans out presence, cursor positions, shared text and reactions to everyone connected, with per-socket flood guards and automatic cleanup when the last person leaves.
It's the same class of problem behind APPIX (synchronized content to thousands of phones at live events) and my live-streaming platform. Open it in two tabs to see it work, or send the link to a friend.