/**
 * Anthropic Messages provider backend. Sends chat through `/v1/messages`.
 * OpenAI Chat Completions JSON ↔ Anthropic Messages translation lives in
 * `anthropic-provider-codec.ts`.
 */
import type { BackendRequest, BackendRequestOptions } from "./backend.js";
import { HttpProviderBackend } from "./backend-core.js";
export declare class AnthropicBackend extends HttpProviderBackend {
    #private;
    chat(body: unknown, signal?: AbortSignal, options?: BackendRequestOptions): BackendRequest;
}