How to return custom http status code calling ObjectReef operation?

according to ObjectReef documentation it's always 200 OK (https://objectreef.dev/doc/rest-api-311/calling-operations-operation-call-) and the assumption is that you should not interfere with the returned HTTP status because it is at a lower level of abstraction.

The framework itself decides what status to return. Other than 200 code you can expect when, for example, the pre-condition is unfulfilled, there is an unauthorized attempt to access the API, or you are invoking a non-existent object. There can be plenty of reasons, but they are always at a slightly lower layer of abstraction than your code.

If you need to return some kind of status after performing your operation then, based on your example, simply add an additional field in the zwapped json

context App::MyOperation: JsonObject
post:
    result = {
        status: 'OK',
        name: 'Name',
        desc: 'Lorem ipsum'
    }