Build with a coding agent

A coding agent can build a small app on ECHO in a folder of yours. Open an empty folder in your agent, then describe the app you want in the prompt below, or pick an example, and open it in your agent.

TodoMVCKanban boardCollaborative notes

PromptBuild TodoMVC on ECHO in this folder: a Vite and React app where each todo is an ECHO object in a space the browser keeps. I can add a todo, tick it done, edit its text with a double click, delete it, filter All, Active and Completed, and clear the completed ones. The todos are still there after a reload.

Open in Claude CodeOpen in CodexOpen in CursorCopy prompt

What the agent reads

The prompt has the agent read /echo/llms-full.txt first. It holds every ECHO page as Markdown, code samples included, so the agent has the whole section in one fetch. The agent then sets the project up from the learning path’s package.json and Vite config, which pin each @dxos package to a build of main until the next npm release. llms.txt lists the other files for agents.

While it works

The agent sets up the project, writes the app and tells you how to run it. Run it when it says so and try what you asked for. To try a shared app, open it in a second browser or a private window, so the second copy has an identity of its own, and join with the code the first one gives you.

To build the learning path’s app yourself instead, start with The ECHO object.