One of the best projects I made in the nwc space was my nwc tester: 
It lets nwc devs test their apps for compatibility with various nwc specs.
I think it would be very cool to have a similar app for testing compatibility with various cashu nut specs:
GitHub
GitHub - supertestnet/nwc_tester: A tool for testing nwc strings and identifying what they are and, more importantly, what they can do
A tool for testing nwc strings and identifying what they are and, more importantly, what they can do - supertestnet/nwc_tester
Cashu NUTs Specifications
