import { PiletRuleContext } from '../types';
export type Options = 'ignore' | 'active' | 'only-used';
/**
 * Checks that "externals" dependencies have been specified in "peerDependencies".
 * This is legacy and only used if no importmap has been specified.
 * Importmap inherited dependencies are auto-checked.
 */
export default function (context: PiletRuleContext, options?: Options): Promise<void>;