It would be really cool to have something like this for RuneScape, although If I have to be realistic I wonder how such a thing can be implemented for RS without it being an XXL effort. Regardless of this, I've reached out, investigating never hurts.
Hey peorkie, about 2 years ago i was working on a project exactly like this (as well as a twitch plugin). Back then i contacted jagex and indicated that i was stuck on some very simple stuff. If there is any intent to work out some bugs in the combat system i can unshelf it and have it up and running in a matter of days.
You've already hit me up via discord so lets chat!
devtrackers.gg