/**
 * events — typed event primitives. The basis of input/focus/scheduler.
 * No dependencies. No I/O.
 */
export interface Disposable {
    dispose(): void;
}
export interface EventEmitter<T> {
    on(listener: (payload: T) => void): Disposable;
    once(listener: (payload: T) => void): Disposable;
    emit(payload: T): void;
    clear(): void;
    readonly size: number;
}
export declare function createEmitter<T>(): EventEmitter<T>;
export interface Signal<T> {
    get(): T;
    set(value: T): void;
    update(fn: (prev: T) => T): void;
    subscribe(listener: (value: T) => void): Disposable;
}
export declare function signal<T>(initial: T): Signal<T>;
export declare function combine(...disposables: Disposable[]): Disposable;
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