/**
 * Sends a signal payload to any paused workflow thread awaiting this signal.
 * @param {string} signalId - Unique signal identifier.
 * @param {Record<any, any>} data - The payload to send with the signal.
 * @returns {Promise<string>} The resulting hook/stream ID.
 */
export declare function signal(signalId: string, data: Record<any, any>): Promise<string>;