export type SwarmEventName = "swarm.started" | "swarm.task.spawned" | "swarm.task.idle" | "swarm.task.error" | "swarm.done" | "swarm.cancelled" | "swarm.script.started" | "swarm.script.done" | "swarm.script.error";
export type SwarmEventPayload = {
    swarmId: string;
    sessionKey: string;
    taskName?: string;
    sessionId?: string;
    error?: string;
    reason?: string;
};
export type SwarmEventHandler = (payload: SwarmEventPayload) => void;
export declare class SwarmEventBus {
    private readonly handlers;
    on(event: SwarmEventName, handler: SwarmEventHandler): () => void;
    emit(event: SwarmEventName, payload: SwarmEventPayload): void;
}
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