HOW META LETS DESIGNERS PROTOTYPE WITH AI IN FORUM

Summary from the TLDR Design newsletter

Meta's designers prototyped Forum, its standalone Facebook Groups app, with AI in a separate experimental build that used production components and excluded prototype code from release. The sandbox drew on the production codebase, frameworks, and design system, so approved work transferred without rebuilding from scratch. Agents ran build checks, automated tests, and visual comparisons before engineering review, and every shipped change required an engineer's approval.