/**
 * UUIDv7 minting, kept free of other imports so the store's open path can use
 * it without loading the cloud crypto module (T12341 row uids).
 *
 * @module
 */
/** A UUIDv7 (RFC 9562 §5.7): 48-bit Unix millis, then random bits. Mints checkpoint ids and row uids. */
export declare function uuidv7(now?: number): string;
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