Function unwrap

src/cli/schema-to-yargs.ts:69–90

* Unwrap Zod wrapper types to get the underlying type.

(t: z.ZodType)

 * Unwrap Zod wrapper types to get the underlying type.
 */
function unwrap(t: z.ZodType): z.ZodType {
  const typeName = getZodTypeName(t);

  // Wrapper types that should be unwrapped
  const wrapperTypes = [
    'optional',
    'nullable',
    'default',
    'transform',
    'pipe',
    'prefault',
    'catch',
    'readonly',
  ];

  if (typeName && wrapperTypes.includes(typeName)) {
    const inner = getInnerType(t);
    if (inner) return unwrap(inner);
  }

  return t;
}

/**
 * Check if a Zod type is optional/nullable/has default.