import type { Cleanup, OwnerScope } from './scope.js';
export interface Activity extends Pick<OwnerScope, 'disposed' | 'own'> {
    readonly signal: AbortSignal;
}
export interface ActivityScope extends OwnerScope {
    readonly active: boolean;
    readonly activity: Activity | undefined;
    activate(): void;
    deactivate(): void;
    onActive(start: (activity: Activity) => void | Cleanup): Cleanup;
}
/** Initially inactive. Instance resources and activity resources are separate. */
export declare const createActivityScope: () => ActivityScope;