I'm gonna try this out. I've never seen something like this before, so I'll leave a rating if it is good.
Well, I don't know Skript, but I decided to make my own plugin. It is capable of interfacing with, and importing from Java. The idea behind Kode is to make it like opening an interpreter directly into Minecraft and being able to see the result as you type. If you go to a consaole window (Terminal or Command Prompt) and, with JDK 8, type `jjs`, this is what I tried to emulate.