bb

Open source, local-first IDE that runs Claude Code, Codex, Cursor and other coding agents in threads, and can rewrite and automate itself through plugins.

bb: In alpha, open to join. Get it at getbb.app.

bb is an open source, local-first IDE for developers who work with coding agents. Claude Code, Codex, Cursor, Pi, OpenCode, Grok, omp and Hermes all run inside it, each in its own thread, and one agent can spawn and manage another. Almost anything in bb can be changed with a single prompt, such as building a Linear plugin with a sidebar panel, CLI command and agent skill. Many of its own features, including GitHub integration, agent memory, scheduled jobs and remote access, are plugins. A CLI lets scripts, cron jobs or chat bots spawn threads. bb is MIT-licensed and free, and agents run on the user's own provider subscriptions.