Diff-feedback/exit-code on cl

Would it be possible to add some sort of feedback (eg with an exit-code) when there are differences between the input-files?

At the moment, cjd generates some output, which must then be manually checked for differences. For usage in eg CI, it would be very useful to have cjd return an exit-code or some other feedback when differences are found.
I've seen there are already some exit-codes, so it would probably have to be a different one to be able to differentiate between an actual error and a diff.

Another idea would be to maybe return (stdout) the number of differences found.