How Meta built its Forum app with AI-native engineering

Meta used AI agents in Forum's planning, implementation, testing and verification, and a small team reached parity with Facebook Groups' core features in 8 weeks. The team supported agent work with readable app state, automated verification and build isolation. Engineers still joined some stages to iterate, and signed off on every shipped result.

Why it matters: Meta wired automated tests, UI checks and verification records into the agent workflow, so engineers review code against checkable results and keep the release sign-off.