import type { Resolvable } from '../ai-lite';
export type TaskPrepareSendMessagesRequest = (options: {
    task?: string;
    kind?: string;
    input: Record<string, unknown>;
    stream: boolean;
    body: Record<string, unknown> | undefined;
    credentials: RequestCredentials | undefined;
    headers: HeadersInit | undefined;
    api: string;
}) => {
    body: object;
    headers?: HeadersInit;
    credentials?: RequestCredentials;
    api?: string;
} | PromiseLike<{
    body: object;
    headers?: HeadersInit;
    credentials?: RequestCredentials;
    api?: string;
}>;
export type TaskTransportOptions = {
    api?: string;
    credentials?: Resolvable<RequestCredentials>;
    headers?: Resolvable<Record<string, string> | Headers>;
    body?: Resolvable<object>;
    fetch?: typeof fetch;
    prepareSendMessagesRequest?: TaskPrepareSendMessagesRequest;
};
export type TaskSendOptions = {
    task?: string;
    kind?: string;
    input: Record<string, unknown>;
    stream: boolean;
    onData?: (output: unknown) => void;
};
/** Default HTTP transport for named Tasks requests and task-output streams. */
export declare class DefaultTaskTransport {
    protected api: string;
    protected credentials: Resolvable<RequestCredentials> | undefined;
    protected headers: Resolvable<Record<string, string> | Headers> | undefined;
    protected body: Resolvable<object> | undefined;
    protected fetch: typeof fetch | undefined;
    protected prepareSendMessagesRequest: TaskPrepareSendMessagesRequest | undefined;
    constructor({ api, credentials, headers, body, fetch: customFetch, prepareSendMessagesRequest, }?: TaskTransportOptions);
    sendTask({ task, kind, input, stream, onData, }: TaskSendOptions): Promise<unknown>;
}