/**
 * JSON validation helper utilities
 * Exposed for consumers who want to build custom schemas mirroring
 * the generator's internal depth validation logic.
 */
/**
 * Returns a Zod refinement snippet enforcing maximum JSON nesting depth.
 * The string begins with a leading dot so it can be concatenated onto an
 * existing base schema (e.g. `z.unknown()` or `z.any()`).
 *
 * Example:
 *   const schema = z.unknown() + jsonMaxDepthRefinement(5)
 *
 * Note: This mirrors the generator logic (typed recursive helper, empty object guard).
 */
export declare function jsonMaxDepthRefinement(maxDepth: number): string;
/** Compose both structure and depth checks (if you want them together). */
export declare function jsonStructureAndDepthRefinement(options: {
    maxDepth?: number;
    enforceSerializable?: boolean;
}): string;