The validator-factory is to initialise the JSONSchema-Validator (which then will be used to validate the OpenAPI-definitions). It can be used to augment the OpenAPI-definition. However, it was never intended to make extensive adaptions/augmentations as the main task of the validation should be done by the JSONSchema-validator (Ajv, in this case). Any modification of the original OpenAPI-definition, just to handle or cover shortcomings of the JSONSchema-validator, may lead to unwanted or unforeseen side-effects and in the worst case may lead to wrong validation-results. That is why I try to keep it at an absolute minimum.