export type UlidFactory = () => string;
export declare function nextUlid(): string;
/**
 * Overrides the ULID factory so tests can run with deterministic identifiers.
 */
export declare function setUlidFactoryForTests(factory: UlidFactory): void;
/**
 * Restores the default monotonic ULID factory.
 */
export declare function resetUlidFactory(): void;
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