/**
 * AnthropicProxy — Anthropic Messages API 纯代理
 *
 * 纯代理转发，不涉及 API 类型转换。
 * 将 Anthropic Messages 格式的请求转发到上游 /v1/messages 端点。
 *
 * 特性：
 * - Anthropic SSE 流式解析
 * - 请求超时保护
 * - Token 用量追踪
 */
import BaseProxy from './common/BaseProxy';
import type { AnthropicProxyInput, AnthropicRequestBody, SSECallbacks } from './common/types';
export default class AnthropicProxy extends BaseProxy<AnthropicProxyInput, void, AnthropicRequestBody> {
    private callbacks?;
    setCallbacks(callbacks: SSECallbacks): this;
    protected validate(input: AnthropicProxyInput): void;
    protected optimizeInput(input: AnthropicProxyInput): AnthropicProxyInput;
    protected transformRequest(input: AnthropicProxyInput): AnthropicRequestBody;
    protected buildEndpoint(input: AnthropicProxyInput): string;
    /**
     * Anthropic API 代理 — 支持流式和非流式
     */
    protected proxy(input: AnthropicProxyInput, body: AnthropicRequestBody, endpoint: string): Promise<void>;
    /**
     * Anthropic SSE 流解析（内联）
     */
    private parseAnthropicStream;
    execute(input: AnthropicProxyInput, callbacks?: SSECallbacks): Promise<void>;
}
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