import type { HttpProtocolClient, ProtocolRequestPayload } from '../http-protocol-client.js';
export declare class OpenAIChatProtocolClient implements HttpProtocolClient<ProtocolRequestPayload> {
    private readonly defaultMaxTokens;
    constructor(defaultMaxTokens?: number);
    buildRequestBody(request: ProtocolRequestPayload): Record<string, unknown>;
    resolveEndpoint(_request: ProtocolRequestPayload, defaultEndpoint: string): string;
    finalizeHeaders(headers: Record<string, string>, _request: ProtocolRequestPayload): Record<string, string>;
    private extractPayload;
    private resolveMaxTokens;
}