type StreamStage = "responses" | "completions";
export type FirstStreamEventTimeoutContext = {
    provider?: string;
    api?: string;
    model?: string;
    timeoutMs: number;
    stage?: StreamStage;
    hint?: string;
    abort?: (reason: Error) => void;
    onTimeout?: (reason: Error) => void;
};
export type FirstStreamEventInternalOptions = {
    firstEventTimeoutMs?: number;
    abortFirstEventStream?: (reason: Error) => void;
    onFirstEventTimeout?: (reason: Error) => void;
};
export type FirstStreamEventAbortController = {
    signal: AbortSignal;
    abort: (reason: Error) => void;
    dispose: () => void;
};
export declare function getFirstStreamEventTimeoutMs(options: unknown): number | undefined;
export declare function getFirstStreamEventTimeoutHandler(options: unknown): ((reason: Error) => void) | undefined;
export declare function createFirstStreamEventTimeoutError(context: FirstStreamEventTimeoutContext): Error;
export declare function createFirstStreamEventAbortController(parentSignal?: AbortSignal): FirstStreamEventAbortController;
export declare function withFirstStreamEventTimeout<T>(stream: AsyncIterable<T>, context: FirstStreamEventTimeoutContext): AsyncIterable<T>;
export {};