GitHub Design released Replica as an MIT-licensed open-source project at Universe. The distinguishing feature is that the AI is supposed to use a team’s actual design-system components, patterns and documentation when generating interactive prototypes. That is a more disciplined approach than producing a visually appealing mockup that engineers must rebuild from scratch.
The immediate application is Rinder: a date-planning screen with venue choices, budget, timing and a clear confirmation state. Give the prototype a small component vocabulary—buttons, cards, type scale, colors—and see whether the result respects it. Replica is designed to work through the GitHub Copilot app and can optionally publish to a self-hosted Replica Hub for feedback.
The sensible evaluation is whether the prototype helps settle a product decision faster, not whether it can generate ten screens. Test one user journey and compare the handoff to the actual Next.js app. If its output is not easy to implement, keep it as a brainstorming tool rather than adding it to the production stack.
Inspect Replica’s MIT-licensed repository and test a single Rinder date-plan screen against your chosen components before adopting another prototyping tool.