/**
 * Codex Responses provider backend. Sends chat through `/v1/responses`.
 * OpenAI Chat Completions JSON ↔ Responses translation lives in
 * `codex-responses-codec.ts`.
 */
import type { BackendRequest, BackendRequestOptions } from "./backend.js";
import { HttpProviderBackend, type ProviderBackendOptions } from "./backend-core.js";
export declare class CodexResponsesBackend extends HttpProviderBackend {
    #private;
    constructor(options: ProviderBackendOptions & {
        accountId?: string;
    });
    reasoningWireShape(): string;
    chat(body: unknown, signal?: AbortSignal, options?: BackendRequestOptions): BackendRequest;
}