/**
 * Identifier generation.
 *
 * UUIDv7 rather than v4: the leading 48 bits are a millisecond timestamp, so ids sort
 * chronologically. That keeps B-tree inserts append-mostly instead of scattering writes across the
 * index, which matters more on D1 than it would on a local disk, and it means `ORDER BY id` is a
 * usable creation order without a separate column.
 */
export declare function newId(): string;
/**
 * A short, URL-safe, human-typable token. Used for things people copy by hand, not for security.
 * Excludes vowels and lookalike characters so generated values are unambiguous and never spell
 * anything unintended.
 */
export declare function newShortId(length?: number): string;