import { EventEmitter } from 'events';
import { EventType } from '../types/event-type.js';
import type { EventPayloadMap } from '../types/event-payload-map-type.js';
/**
 * Typed event bus used to decouple side-effect services (audio, commands,
 * webhooks, storage) from the core state-machine handlers.
 */
export declare class EventBusService extends EventEmitter {
    emit<K extends EventType>(event: K, payload: EventPayloadMap[K]): boolean;
    on<K extends EventType>(event: K, listener: (payload: EventPayloadMap[K]) => void): this;
    off<K extends EventType>(event: K, listener: (payload: EventPayloadMap[K]) => void): this;
}