/**
 * Unwraps Zod wrapper types (optional, nullable, default, catch, etc.) to get the inner type.
 *
 * Zod allows chaining modifiers like `.optional().nullable().default()`.
 * This function recursively unwraps these modifiers to find the core type.
 *
 * Includes a depth limit to prevent stack overflow from malformed schemas.
 *
 * @param schema - A Zod schema that may be wrapped
 * @param depth - Current recursion depth (internal use)
 * @returns The innermost unwrapped Zod type
 *
 * @example
 * const schema = z.object({ x: z.number() }).optional().nullable();
 * unwrapZodType(schema); // Returns the ZodObject
 *
 * @example
 * // Deeply chained modifiers
 * const schema = z.object({ x: z.number() }).optional().nullable().default({ x: 0 });
 * unwrapZodType(schema); // Returns the ZodObject
 */
export declare const unwrapZodType: (schema: unknown, depth?: number) => unknown;