bb is a free, MIT-licensed, local-first IDE that runs multiple AI coding agents (Claude Code, Codex, Cursor, Grok, Hermes, and others) in parallel threads using the user's own provider subscriptions.

Its CLI and plugin architecture lets external scripts, cron jobs, and chat bots spawn agent work, and bb's own integrations are built as plugins. Version 0.41.0 adds scheduled sends, concurrency limits, and a rebuilt mobile app.