Block’s BuilderBot Ships 1,500 Pull Requests a Week — 15% of All Production Code Is Now AI-Written
Block (Square, Cash App) just rolled out BuilderBot — an AI agent that autonomously writes code, opens pull requests, and monitors CI across Block’s entire codebase. It’s already responsible for 15% of all production code changes. This isn’t a demo. It’s Harness Theory in production at enterprise scale. Business Engineer My Life in the Harness […]




















