Core

This is the foundation layer for building AI-generated UIs with json-render. You get schema definition with defineSchema, catalog creation with defineCatalog for mapping your components, and tools to generate the system prompts that tell Claude how to build specs. The prop expression system is well thought out: $state for reading, $bindState for two-way binding, $computed for custom functions, $cond for branching. State watchers let you trigger actions on changes, and the validation helpers cover cross-field rules like matching passwords or comparing dates. If you're building a system where AI generates JSON specs that render into actual interfaces, this gives you the primitives to make that reliable.

Install to Claude Code

npx -y skills add vercel-labs/json-render --skill core --agent claude-code