/**
 * Utility functions for inspecting Zod 4 schemas.
 * These use duck typing to work across bundle boundaries.
 */
/**
 * Check if a value is a Zod 3 schema (has _def but not _zod)
 */
export declare function isZod3Schema(val: unknown): boolean;
/**
 * Check if a value is a Zod schema (duck typing to work across bundle boundaries)
 */
export declare function isZodSchema(val: unknown): boolean;
/**
 * Get the Zod type name from a schema
 */
export declare function getZodTypeName(schema: unknown): string | undefined;
/**
 * Check if schema is a ZodObject
 */
export declare function isZodObject(schema: unknown): boolean;
/**
 * Check if schema is a ZodOptional
 */
export declare function isZodOptional(schema: unknown): boolean;
/**
 * Check if schema is a ZodNullable
 */
export declare function isZodNullable(schema: unknown): boolean;
/**
 * Check if schema is a ZodArray
 */
export declare function isZodArray(schema: unknown): boolean;
/**
 * Check if schema is a ZodDefault
 */
export declare function isZodDefault(schema: unknown): boolean;
/**
 * Get the shape of a ZodObject schema
 */
export declare function getObjectShape(schema: unknown): Record<string, unknown> | undefined;
/**
 * Get the inner schema from Optional/Nullable/Default
 */
export declare function getInnerSchema(schema: unknown): unknown;
/**
 * Get the element schema from a ZodArray
 */
export declare function getArrayElement(schema: unknown): unknown;