author here: This is way more then Flask/Bottle, I understand what would make you reach that conclusion, but if you look here https://github.com/timothycrosley/hug/blob/develop/ARCHITECT... You can see just how much it adds that really are core concepts that can't be done with simple decorators on-top of Flask.

Highlights:

- Automatic documentation - Type annotation based validation and transformation of input fields - Directives to inject more data (like request data) into existing functions in a safe and reusable way - It's easily twice as fast at handling requests as Flask, making Flask a rather horrible base for any competitor