export declare function createId(prefix: string): string;
export declare function nowIso(): string;
export declare function slugify(value: string): string;
export declare function ensureDirectory(path: string): Promise<void>;
export declare function fileExists(path: string): Promise<boolean>;
export declare function readJsonFile<T>(path: string): Promise<T>;
export declare function writeJsonFile(path: string, value: unknown): Promise<void>;
export declare function appendJsonLine(path: string, value: unknown): Promise<void>;
export declare function clamp(value: number, min: number, max: number): number;
export declare function normalizeFivePoint(value: number): number;
export declare function round(value: number, digits?: number): number;
export declare function hashFileSha256(path: string): Promise<string>;
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