Meta explains how it built the Forum app with AI-native engineering

Meta's engineers built Forum, a standalone Groups app, by bringing an AI agent into the development cycle. They say the agent handled planning, building, testing and verification, with engineers setting goals and approving results.

Meta reports that Forum reached core feature parity with Facebook Groups in eight weeks, and that an agent-run stress test found a memory issue that was then fixed before launch, roughly halving memory use and page faults.