Package: addFiles for Production Only?

Hi, do we have a way to add files for debug only? I know I can create a whole package for debug only, but what if I dont need some .js, .css and images from package on production?

Make sub-package with debug-only items?

Bit complicated, but yes I can do it. I found it as a first solution. But the question is how to add files for PRODUCTION ONLY - means that on debug I wouldn’t add them. “Debug only” solution isn’t helpful in this case.