import { type ZodType, z } from "zod";
import type { Message } from "../agents/agent.js";
export declare function outputSchemaToResponseFormatSchema(agentOutput: ZodType<Message>): Record<string, unknown>;
export declare function parseJSON(json: string): any;
/**
 * Ensure that the union array has at least 1 item.
 * NOTE: the zod union requires at least 2 items (just type definition, not runtime behavior)
 * so we need to ensure that the union has at least 1 item.
 * @param union - The union array
 * @returns The union array with at least 1 item (but the type is at least 2 items for z.union)
 */
export declare function ensureZodUnionArray<T extends z.ZodType>(union: T[]): [T, T, ...T[]];
export declare function isZodSchema(schema: ZodType): schema is ZodType;
export declare const wrapAutoParseJsonSchema: <T extends ZodType>(schema: T) => T;
export declare function getZodObjectKeys(schema: ZodType): string[];