import { ProviderMessage, ProviderResponse, LLMProvider, ChatOptions, StreamDelta } from './types.js';
import type { ToolDefinition } from '../tools/interface.js';
export declare class AnthropicProvider implements LLMProvider {
    private client;
    private model;
    constructor(apiKey: string, model: string, options?: {
        baseURL?: string;
        timeout?: number;
    });
    /**
     * Translate Zoe messages + tools into Anthropic's request shape. Shared by
     * `chat()` and `chatStream()` so the (non-trivial) translation lives once.
     */
    private buildRequest;
    chat(messages: ProviderMessage[], tools: ToolDefinition[], options?: ChatOptions): Promise<ProviderResponse>;
    /**
     * Stream the response via Anthropic's message stream. Text blocks yield
     * `text_delta`; tool_use blocks yield `tool_call_begin` (on block start) then
     * `tool_call_delta` for each `input_json_delta` fragment, keyed by block index.
     */
    chatStream(messages: ProviderMessage[], tools: ToolDefinition[], options?: ChatOptions): AsyncIterable<StreamDelta>;
}