Open-source Go library for type-safe HTTP APIs on net/http. One handler struct gives request binding, validation, an OpenAPI 3.1 document, and generated clients, all derived once at registration so the request path only runs precomputed plans.

• Binds path, query, header, cookie, form and body fields from struct tags

• Generates a TypeScript client where each endpoint's declared errors form a typed union, plus Zod schemas with the same validation rules

• Built-in docs page, a dev loop that rebuilds and regenerates on save, and a mock server

• CI check that fails when the generated client is out of date