Using a typed schema in Sanity Studio

toClassicSchema(documentSchema, {locale?, fallback?}) converts a document schema to the array of schema type definitions a Studio config expects. It maps title, description, deprecated and readOnly from the annotations onto the classic definitions, resolving translated text to locale, or to fallback when locale has no entry.

Proof of concept

toClassicSchema does not emit referenced document types, which fields are required, or Portable Text styles, decorators and annotations. Treat the result as a starting point.

Recursive object types become named top-level types, referred to by their _type. toClassicSchema() throws on a recursive object type without a _type literal. An image or file can't become a named type, since its _type is always image or file, so a cycle through one must also pass through an object with a _type literal or a reference().

import * as s from '@sanity-labs/typed-schema'
import {defineConfig} from 'sanity'

const Author = s.document({_type: s.literal('author'), name: s.string()})

type Author = s.Infer<typeof Author>

export default defineConfig({
  projectId: 'abc123',
  dataset: 'production',
  schema: {types: s.toClassicSchema(Author)},
})

examples/compat-studio runs a Studio on it.