export declare class QuotaExceededError extends Error {
    constructor(message?: string);
}
/**
 * Captures consumption of LLM tokens.
 * @param requestOptions - Optional request options (e.g. from withTrackingHeaders()) for user-action tracking headers.
 * @returns The capture UUID if successful, undefined otherwise.
 */
export declare function captureConsumption(requestOptions?: RequestInit): Promise<string | undefined>;
/**
 * Reports consumption of LLM tokens to the backend.
 * Fire-and-forget: failures are non-critical and are silently ignored.
 * @param quotaId - The capture UUID from captureConsumption.
 * @param requestOptions - Optional request options (e.g. from withTrackingHeaders()) for user-action tracking headers.
 */
export declare function reportConsumption(quotaId: string, requestOptions?: RequestInit): void;