GUIs!
Yes, you've heard it rigtht, this release brings GUI support. Don't get too excited though - it's still a 'basic' chest UI, on order to keep the mod server-sided.
While you are downloading the update, make sure to give the https://github.com/patbox/sgui a star, as guis wouldn't be possible without it!
Note: you still cannot execute commands which require 2 arguments.
How to
Type /npc to open a gui. Left click an item to go in submenu (if it exists) or right click it to execute it right away.
Scarpet event changes
A list of traits is now added as a parameter in event calls, making it possible to distinguish between different scarpet professions. See https://github.com/samolego/TaterzenScarpetProfessions/blob/master/README.md for info.
What's next
GUIs are not limited to items! They have a CustomModelData tag (that can be also changed in config), which makes it possible to create buttons using resourcepacks. As I'm not really an artist myself, there are no default textures. Feel free to PR a resource pack with your button textures though!