/**
 * Proxy stream function for apps that route LLM calls through a server.
 * The server manages auth and proxies requests to LLM providers.
 */
import { type AssistantMessage, type AssistantMessageEvent, type Context, EventStream, type Model, type SimpleStreamOptions, type StopReason } from '@earendil-works/pi-ai';
declare class ProxyMessageEventStream extends EventStream<AssistantMessageEvent, AssistantMessage> {
    constructor();
}
/**
 * Proxy event types - server sends these with partial field stripped to reduce bandwidth.
 */
export type ProxyAssistantMessageEvent = {
    type: 'start';
} | {
    type: 'text_start';
    contentIndex: number;
} | {
    type: 'text_delta';
    contentIndex: number;
    delta: string;
} | {
    type: 'text_end';
    contentIndex: number;
    contentSignature?: string;
} | {
    type: 'thinking_start';
    contentIndex: number;
} | {
    type: 'thinking_delta';
    contentIndex: number;
    delta: string;
} | {
    type: 'thinking_end';
    contentIndex: number;
    contentSignature?: string;
} | {
    type: 'toolcall_start';
    contentIndex: number;
    id: string;
    toolName: string;
} | {
    type: 'toolcall_delta';
    contentIndex: number;
    delta: string;
} | {
    type: 'toolcall_end';
    contentIndex: number;
} | {
    type: 'done';
    reason: Extract<StopReason, 'stop' | 'length' | 'toolUse'>;
    usage: AssistantMessage['usage'];
} | {
    type: 'error';
    reason: Extract<StopReason, 'aborted' | 'error'>;
    errorMessage?: string;
    usage: AssistantMessage['usage'];
};
type ProxySerializableStreamOptions = Pick<SimpleStreamOptions, 'temperature' | 'maxTokens' | 'reasoning' | 'cacheRetention' | 'sessionId' | 'headers' | 'metadata' | 'transport' | 'thinkingBudgets' | 'maxRetryDelayMs'>;
export interface ProxyStreamOptions extends ProxySerializableStreamOptions {
    /** Local abort signal for the proxy request */
    signal?: AbortSignal;
    /** Auth token for the proxy server */
    authToken: string;
    /** Proxy server URL (e.g., "https://genai.example.com") */
    proxyUrl: string;
}
export declare function streamProxy(model: Model<any>, context: Context, options: ProxyStreamOptions): ProxyMessageEventStream;
export {};