import { type z } from 'zod';
import { type Model, type Msg } from '../index.js';
/**
 * Extract data using OpenAI structured outputs.
 *
 * Always returns an object satisfying the provided Zod schema.
 */
export declare function createExtractFunction<Schema extends z.ZodObject<any>>(args: {
    /** The ChatModel used to make API calls. */
    chatModel: Model.Chat.Model;
    /** A descriptive name for the object to extract. */
    name: string;
    /** The Zod schema for the data to extract. */
    schema: Schema;
    /** Add a system message to the beginning of the messages array. */
    systemMessage: string;
    /** Apply strict validation to the extracted data (default: true) */
    strict?: boolean;
}): (input: string | Msg) => Promise<z.infer<Schema>>;