/**
 * Generate a unique ID for document IDs
 *
 * @param idType - 'text' for nanoid-style (default), 'uuid' for standard UUID
 */
export declare function generateId(idType?: 'text' | 'uuid'): string;
/**
 * Generate a monotonically increasing version timestamp
 * Uses Date.now() as the base but ensures each call returns a unique value
 * even when multiple operations occur within the same millisecond
 *
 * @returns Milliseconds since epoch, guaranteed to be greater than the last call
 */
export declare function generateVersion(): number;
/**
 * Generate a ULID (Universally Unique Lexicographically Sortable Identifier)
 * Time-ordered and sortable, ideal for event logs
 */
export declare function generateUlid(): string;
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