Hi Alan!
In Magento 2.1 a CategoryProductSearchResultInterface has been added but there is no implementation yet: https://github.com/magento/magento2/blob/2.1/app/code/Magento/Catalog/Api/Data/CategoryProductSearch...
It's good to see that the catalog service contracts are going to be extended because currently they are not sufficient for non-trivial tasks.
Do you know if the team is working on that one? Or generally framed, can we expect additions to the API in 2.2 ? If not, are pull requests for API additions welcomed? By definition, that will be BC breaking, so I understand that it's not an easy choice.