export declare const JSON_SCHEMA_2020_12 = "https://json-schema.org/draft/2020-12/schema";
/** Complexity limits for untrusted schemas; also enforced by the client before validation. */
export declare const MAX_JSON_SCHEMA_DEPTH = 128;
export declare const MAX_JSON_SCHEMA_NODES = 10000;
/**
 * Converts a 2019-09 schema (e.g. from zod v3) into 2020-12 form. Tuples are the
 * only structural difference handled: array-form `items` becomes `prefixItems`,
 * and `additionalItems` becomes `items`.
 *
 * Returns `undefined` when the schema does not declare 2019-09, or relies on
 * features this conversion cannot preserve (`$recursiveRef`/`$recursiveAnchor`,
 * `$ref` pointers into tuple members, embedded `$schema` declarations,
 * `unevaluatedItems`, `prefixItems`, or `contentSchema`), or exceeds the depth/node limits.
 * Callers should then keep the original.
 */
export declare function toJsonSchema2020<T extends {
    $schema?: string;
}>(schema: T): T | undefined;
//# sourceMappingURL=json-schema-dialect.d.ts.map