An Open Source Codex App that works across provider

Hey HN!

We built bb, an open-source agentic development environment for working with coding agents.

There are a ton of these now, so you might ask yourself: why this one?

Most of the open-source ones feel like terminal wrappers. We wanted something that has the polish of the Codex app, but is open source, local-first, and works across providers.

We also wanted our ADE to be able to use itself. Most agent managers treat the agent like it’s just running in a terminal. In bb, your coding agents can spawn other threads, read their output, open files for you to view in the editor, and even customize bb’s own UI.

It’s scriptable too. An external agent, cron job, shell script, or bot can spin up tasks inside bb, and when they’re finished they’re sitting there waiting for you to review in the interface.

Right now it works with Claude Code, Codex, Cursor, Pi, and OpenCode using the provider subscriptions you already pay for.

I’d love for you all to give it a shot and let me know if it does or doesn't work for you.

Repo: https://github.com/ymichael/bb App: https://getbb.app