/**
 * Translator orchestration — translateRequest / translateResponse / initState
 * 参考 OmniRoute open-sse/translator/index.ts
 */
import { type Format } from './formats';
/**
 * 翻译请求体：source → target
 * hub-and-spoke: 所有非 Chat 格式先转为 Chat，再从 Chat 转为 target
 */
export declare function translateRequest(sourceFormat: Format, targetFormat: Format, model: string, body: Record<string, unknown>, stream?: boolean): Record<string, unknown> | null;
/**
 * 初始化响应转换状态
 */
export declare function initState(format: Format): Record<string, unknown>;
/**
 * 翻译响应 chunk：targetFormat SSE → sourceFormat SSE
 * hub-and-spoke: target → Chat → source
 */
export declare function translateResponse(targetFormat: Format, sourceFormat: Format, chunk: Record<string, unknown>, state: Record<string, unknown>): Record<string, unknown>[] | null;
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