I've found that telling agents to not do something mostly just gives them a suggestion of a way to do that thing, and the part about not doing it that way gets lost. Well, it's nicely accessible for when it apologizes for doing it.

I now try to only give examples of how I want it to do things, and hooks that complain when they do the bad thing (but still don't mention the bad thing in the complaint.)

I would actually prefer chained ternaries over more verbose if/else expressions with duplicated LHS, so this does go back to the argument about "taste".

You're better off using linting for something specific like that.