export type EngineEvent = {
    type: string;
    payload: unknown;
    timestamp: string;
};
type EngineEventListener = (event: EngineEvent) => void;
export declare class EngineEventBus {
    private emitter;
    emit(type: string, payload: unknown): void;
    onEvent(listener: EngineEventListener): () => void;
}
export {};
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