Vercel's json-render added a TanStack Start renderer that turns a JSON spec into a full routed app.

A model emits a constrained JSON spec against a catalog of components you declare with Zod schemas, then the library renders it progressively. v0.21.0 on September 18 adds @json-render/tanstack-start, producing a whole application with file-based routes, reusable layouts, SSR loaders, head metadata, prerender paths and route fallbacks, not just a component tree. React, Vue, Svelte, Solid and React Native, with 36 shadcn/ui components plus PDF, email, video and 3D packages. 18,034 stars, 763 added on September 22. (GitHub)