import type { PackageJson } from 'pkg-types';
export declare const isPackageInstalled: (name: string) => boolean;
export declare const getPackageInfo: (name: string) => {
    name: string;
    version: string | undefined;
    rootPath: string;
    packageJsonPath: string;
    packageJson: PackageJson;
};
export declare const getPackageJson: (cwd?: string) => PackageJson | null;