export declare function withWidgetFallback<T>(enabled: boolean, run: () => T): T;
export declare function needsWidgetFallback(): boolean;
interface RequestTelemetry {
    requestId: string;
    analyticsIdentity?: {
        userId: string;
        clientName: string;
    };
}
export declare function runWithRequestTelemetry<T>(requestId: string, callback: () => T, analyticsIdentity?: RequestTelemetry["analyticsIdentity"]): T;
export declare function requestTelemetry(): {
    requestId?: string;
};
export declare function runWithRequestSignal<T>(signal: AbortSignal | undefined, callback: () => T): T;
export declare function upstreamSignal(timeoutMs: number, explicitSignal?: AbortSignal): AbortSignal;
export declare function requestAnalyticsIdentity(): {
    userId: string;
    clientName: string;
} | undefined;
/** SDK cancellation reasons may be plain Error objects, not AbortError. */
export declare function requestErrorCategory(error: unknown, signal?: AbortSignal | undefined): string;
export {};