GitHub actions to fail if new rules are added

[Quintasan]

I was wondering if it would be a good idea to have a sample project that simply installs the latest Rubocop, pulls this style guide and checks if there are any warnings from Rubocop in which case it would fail to let us know that there's a new cop which we didn't review.

What do you think?

[janlelis]

I like the idea, but I am not sure how to implement it. It's kind of hard to foresee which effect a new rule will have on some piece of code. Do you have an idea what kind of sample project that could be? Maybe something like typical Ruby gem / Rails ap?