/**
 * Lightweight browser polyfill for Node's EventEmitter.
 *
 * Implements the subset used by the FrontMCP codebase:
 * emit, on, off, removeAllListeners, setMaxListeners, listenerCount.
 */
type Listener = Function;
export declare class EventEmitter {
    private events;
    emit(event: string | symbol, ...args: unknown[]): boolean;
    on(event: string | symbol, handler: Listener): this;
    off(event: string | symbol, handler: Listener): this;
    addListener(event: string | symbol, handler: Listener): this;
    removeListener(event: string | symbol, handler: Listener): this;
    removeAllListeners(event?: string | symbol): this;
    setMaxListeners(_n: number): this;
    listenerCount(event: string | symbol): number;
}
export {};