OB-1 is an open-source coding agent for your terminal. Install it and start with no account, no card, no API key. Its free tier is a router built into the CLI that pools 162 free models across 22 providers, so no single vendor can pull the plug. After every change it runs your project's checks and fixes what broke until they pass. For frontier models, paid plans are prepaid credits, hard-capped, so no bill can run past the number you set. Install: brew install overbrilliant/tap/ob1