/**
 * Lazy schema factory.
 *
 * `defineSchema(factory)` returns a memoized getter that resolves the
 * `SchemaValidator` extension contract on first call and materializes the
 * schema via the provided factory. This indirection lets core modules declare
 * schemas without importing zod directly. A real validator (typically
 * `@veryfront/ext-schema-zod`) must be registered in the contract registry before
 * the schema is first accessed.
 *
 * @module schemas/define
 */
import type { Schema, SchemaFactory, SchemaValidator } from "../extensions/schema/index.js";
export declare function resolveSchemaValidator(): SchemaValidator;
/** Assert the runtime surface promised by the opaque Schema contract. */
export declare function assertSchemaContract<T>(value: unknown, message: string): asserts value is Schema<T>;
/**
 * Wrap a schema factory so that it is built lazily on first call.
 *
 * @param factory - Receives a `SchemaValidator` and returns a `Schema<T>`.
 * @returns A zero-arg getter that caches and returns the built schema.
 * Requires a SchemaValidator extension to be registered before first use.
 *
 * @example
 * ```ts
 * const getUserSchema = defineSchema((v) =>
 *   v.object({ id: v.string().uuid(), name: v.string().min(1) })
 * );
 *
 * const user = getUserSchema().parse(input);
 * ```
 */
export declare function defineSchema<T>(factory: SchemaFactory<T>): () => Schema<T>;
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