Show HN: Collaborate.dev – Multiplayer Visual Desktop for Coding Agents

collaborate.dev is free. Nothing to install or setup. No account is required (login is optional).

Just copy + paste the instruction prompt into your agent. Then give the agent any task to work with you on the desktop.

What can you use it for?

*Multiplayer Context* - collaborate.dev is multiplayer - multiple people can join the desktop and you all see cursors and changes in real time. Place skills, research, guidelines, and articles as text or html right on the desktop. Share the agent instructions with your team and you can build/reuse agent context together.

*Multiplayer Documents* - Work on multiple documents on the desktop, co-edit them gdocs style with realtime multiplayer editing and commenting (agents can edit + comment too).

*Visual Artifacts* - organize and compare HTML outputs side by side in a unified space, deploy them to a sharable link with a click. Draw on the canvas itself label/organize artifacts spatially.

*Multiagent Coordination* - Beyond teams of people, desktops can be used to coordinate teams of agents. They can check status of different work streams, comment on each others’ plans, share knowledge with each other directly without you having to juggling and copy-pasting between windows.