import type { Spec } from '@vltpkg/spec';
import type { PromptFn, VlxInfo, VlxOptions } from './index.ts';
/**
 * Install a given package spec in the appropriate folder, if it's not
 * already present.
 */
export declare const vlxInstall: (spec: Spec | string, options: VlxOptions, promptFn?: PromptFn) => Promise<VlxInfo>;