/** Returns true when a filesystem path exists and is accessible. */
export declare function pathExists(path: string): Promise<boolean>;
/** Serializes JSON with stable formatting and writes atomically. */
export declare function writeJsonAtomic(path: string, data: unknown): Promise<void>;
/**
 * Writes text atomically by writing to a temporary file then renaming in-place.
 * Ensures readers never observe partial content.
 */
export declare function writeTextAtomic(path: string, content: string): Promise<void>;
/** Reads and parses JSON; returns null when file does not exist or is invalid. */
export declare function readJsonFile<T>(path: string): Promise<T | null>;
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