I've tried to explain my structure a bit better in a reply to voltagex_. For your specific question - all routing is done from within the top / Flask layer (as

I've tried to explain my structure a bit better in a reply to voltagex_. For your specific question - all routing is done from within the top / Flask layer (as is redirecting / aborting). My App layer does not have any Flask stuff in, at all, ever.