import type { PlanItem } from "../types.js";
export declare function readOptional(path: string): Promise<string>;
export declare function directoryNames(path: string): Promise<string[]>;
export declare function containsKeyDeep(value: unknown, key: string): boolean;
export declare function unique<T>(values: T[]): T[];
export declare function directoryDigest(path: string): Promise<string | null>;
export declare function planSymlink(items: PlanItem[], id: string, source: string, target: string, managedReleasesDir: string, adoptExisting?: boolean): Promise<void>;