Could the items to be tuned with kubejs script?
I am a modpack developer. It would be good if this mod support KubeJS so that I can use the /. +/ format from JavaScript which is a lot faster in modifying the level required for each tools.
For example, if i want players to use spartanweaponry iron items only after lv10, i could write
"/spartanweaponry:. +_iron/ gathering:10"
I am not familiar with toml file. If toml file support this kind of format, could you give me an example on how to use it?

Thanks a lot!

TOML does not support syntax like that afaik. Apart from that, I'll consider KubeJS support, but don't count on it.