**The TypeScript FHIR toolchain.** A typed query builder ([Kysely](https://github.com/kysely-org/kysely)-inspired), a code generator that emits resources / profiles / ValueSets / search-param types from any FHIR version or IG, a FHIRPath builder + invariant evaluator, optional [Standard Schema V1](https://standardschema.dev/) validators (zod or zero-dep native), SMART on FHIR v2 auth, a terminology engine with real `is-a` / `descendent-of` / regex filters, and an MCP server that exposes any FHIR