import type { WebSocket } from 'ws';
export interface FleetEvent {
    eventId: string;
    at: string;
    roleId?: string;
    kind: string;
    payload: unknown;
}
export declare class FleetEventBus {
    private readonly events;
    private readonly clients;
    publish(kind: string, payload: unknown, roleId?: string): FleetEvent;
    attach(socket: WebSocket, lastEventId?: string): () => void;
    close(): void;
}