import type { Backend, BackendPorts, BackendRequest, BackendRequestOptions } from "./backend.js";
export type OpenAiBackendOptions = {
    /**
     * Base URL including the OpenAI API prefix, e.g.
     * `http://127.0.0.1:8080/v1`. Route paths (`/chat/completions`, `/models`,
     * `/embeddings`) are appended to this value.
     */
    baseUrl: string;
    /**
     * Bearer credential forwarded to the backend. Local servers ignore it; the
     * default mirrors the `not-needed` placeholder the AI SDK uses for local
     * OpenAI-compatible servers.
     */
    apiKey?: string;
    /** Model id used when a request omits `model`. */
    defaultModel?: string;
    /**
     * When set, every request's `model` is overwritten with this id before it is
     * forwarded upstream, regardless of what the client sent. Used by per-candidate
     * capture gateways that are dedicated to one routed endpoint: the driving CLI
     * (e.g. Claude Code) picks its own model label, but the router must always
     * receive the routed model id. Absent means the client's model passes through.
     */
    forceModel?: string;
    /**
     * Extra headers sent on every request.
     */
    headers?: Record<string, string>;
};
/** An OpenAI HTTP backend supporting Chat Completions and native Responses. */
export declare class OpenAiBackend implements Backend {
    #private;
    readonly defaultModel: string | undefined;
    readonly ports: BackendPorts;
    constructor(options: OpenAiBackendOptions);
    chat(body: unknown, signal?: AbortSignal, options?: BackendRequestOptions): BackendRequest;
    supportsResponses(): boolean;
    responses(body: unknown, signal?: AbortSignal, options?: BackendRequestOptions): BackendRequest;
    models(signal?: AbortSignal): BackendRequest;
    embeddings(body: unknown, signal?: AbortSignal, options?: BackendRequestOptions): BackendRequest;
}