import type { z } from 'zod';
interface AssignEntityIdsOptions {
    /** If returns true for an ID, that ID is preserved (not regenerated). */
    isExistingId?: (id: string) => boolean;
}
/**
 * Recursively assigns IDs to an entity and all nested child entities.
 *
 * Walks the schema using `transformDataWithSchema` to detect entity nodes
 * (via `getEntityMeta`). At each entity boundary, generates a new ID unless
 * the existing ID is preserved by the `isExistingId` callback.
 *
 * Returns a new object with IDs assigned (immutable, structural sharing).
 */
export declare function assignEntityIds<T>(schema: z.ZodType, data: T, options?: AssignEntityIdsOptions): T;
export {};
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