export declare function assertUuid(str: string, which?: string): string;
/**
 * Generate a UUID v7 from a timestamp.
 *
 * @param timestamp - The timestamp in milliseconds
 * @returns A UUID v7 string
 */
export declare function uuid7FromTime(timestamp: number | string): string;
/**
 * Get the version of a UUID string.
 * @param uuidStr - The UUID string to check
 * @returns The version number (1-7) or null if invalid
 */
export declare function getUuidVersion(uuidStr: string): number | null;
/**
 * Warn if a UUID is not version 7.
 *
 * @param uuidStr - The UUID string to check
 * @param idType - The type of ID (e.g., "run_id", "trace_id") for the warning message
 */
export declare function warnIfNotUuidV7(uuidStr: string, _idType: string): void;