export declare function exists(filePath: string): Promise<boolean>;
export declare function ensureDir(dirPath: string): Promise<void>;
export declare function readJson<T>(filePath: string, fallback: T): Promise<T>;
export declare function writeJson(filePath: string, value: unknown, { overwrite }?: {
    overwrite?: boolean | undefined;
}): Promise<void>;
export declare function updateJsonFile<T>(filePath: string, fallback: T, update: (current: T) => T | Promise<T>): Promise<T>;
export declare function appendJsonLine(filePath: string, value: unknown): Promise<void>;
export declare function resolveWorkflowPath(root: string, ...segments: string[]): string;
export declare function resolveWorkspaceWritePath(root: string, relativePath: string): string;