export declare function readJson<T>(filePath: string): Promise<T>;
export declare function readJsonMaybe<T>(filePath: string): Promise<T | undefined>;
export declare function writeJson(filePath: string, data: unknown, space?: number): Promise<void>;
export declare function writeJsonNewline(filePath: string, data: unknown, space?: number): Promise<void>;
export declare function parseJson<T>(raw: string): T;
export declare function stringifyJson(data: unknown, space?: number): string;
/** Recursively sort object keys for stable, deterministic serialization. */
export declare function sortKeys(obj: unknown): unknown;
/** Stable JSON stringify: sorted keys, no extra whitespace. */
export declare function stableStringify(obj: unknown): string;