canvas

canvas

A multiplayer board whose frames are coding agents, project files, terminals and browser previews. The agents run on one person's machine; everyone else joins from their browser, peer to peer.

Read the docsbunx @frebreco/canvas serve
A board: an agent frame, the file it opened at the relevant lines, a markdown plan, a terminal and a browser frame
An agent opened the login code at the relevant lines. Ada, a guest, points at the plan.

What's on the board

Agent frames

Claude Code or opencode sessions running on the host's machine. Everyone reads the thread and writes the prompt together.

Board tools

Agents open files at the relevant lines, terminals and previews next to their own frame.

Files frames

Project files, read-only and live, with a file tree, markdown preview and shared selections.

Terminal and browser frames

Shells on the host's machine mirrored to everyone, and previews of any URL.

Guest access

View, edit or trusted. With edit, the host approves every prompt before it runs.

Focus

See who is in which frame, and scroll with them.

Start

  1. 1

    bunx @frebreco/canvas serve

    in your project. It prints the host link.

  2. 2

    Open the host link

    in your browser. You are the host.

  3. 3

    Copy guest link

    from the top bar, and send it to the people you work with.

Needs Bun and Claude Code or opencode on the host's machine. Guests need a browser. Quick start

How it stays on your machine

Architecture · Security