Schema

Gives Claude five schema operations: generating JSON Schema from sample data with automatic type inference and enum detection, converting JSON or schemas into TypeScript interfaces, validating data against schemas with detailed error paths, creating realistic mock data with smart field detection (emails, names, phone numbers), and diffing two schemas to identify breaking changes. Reach for this when you're working with APIs or data structures and need Claude to validate payloads, generate types for your codebase, produce test fixtures, or analyze schema evolution between versions. Runs locally via stdio, so your schemas and data stay on your machine.