import { Stream } from 'effect';
import type { StreamEvent } from './events';
export interface OpenAIStreamOptions {
    model: string;
    timeoutMs?: number;
    now?: () => number;
    signal?: AbortSignal;
}
export interface OpenAIChatChunk {
    id: string;
    object: 'chat.completion.chunk';
    created: number;
    model: string;
    choices: Array<{
        index: number;
        delta: {
            role?: 'assistant';
            content?: string;
            tool_calls?: Array<{
                index: number;
                id: string;
                type: 'tool_call';
                tool_call: {
                    name: string;
                    arguments: string;
                };
            }>;
        };
        finish_reason: string | null;
    }>;
    usage?: {
        prompt_tokens?: number;
        completion_tokens?: number;
        total_tokens?: number;
    };
}
type OpenAIChunk = OpenAIChatChunk;
export declare const toOpenAIStream: <E extends Error, R>(events: Stream.Stream<StreamEvent, E, R>, options: OpenAIStreamOptions) => Stream.Stream<OpenAIChunk, E | Error, R>;
export {};
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