I would love to see a proper custom enchant system.

I know that TuSke has a custom enchant system, but only half of it works.
It would be awesome to have a system where you could register custom enchants, that could enchant items in the enchanting table.

As of right now, thru various testing (on 1.12.2) I have gotten Tuske to enchant items, but here are some downfalls:
1) It also adds "unbreaking" to said item (im assuming for the glowing effect)
2) Items do not receive the enchantment in the enchanting table.

If it would be possible to make an add-on that fixed those items, as well as MAYBE just MAYBE a possibility for custom enchant books as well, that would be super rad!

Edit:
Im going to add to this, maybe also include the anvil API?!?!
In reference to my comment regarding the books, I know that you can just make an enchanted book in skript with lore, but for the life of me I cant figure out how to deal with it in the damn anvil!