Although this is not a problem in the regular format, when trying to create custom types based on the RouteConfig type. I cannot set the status code to a number.

for example creating the custom type

type KeyValueUnion<T> = {
  [K in keyof T]: { status: K, result: T[K] }
}[keyof T];

type IRoute<I = RouteConfig['request'], O = RouteConfig['responses']> = Omit<RouteConfig, 'request' | 'responses'> & {
  request: I,
  responses: O,

  func: (input: I) => Promise<KeyValueUnion<O>>
}

For easier integration with express, It wants the status code to be a string. (as now I don't use the status code as a key to an object, but as a value of an object)