Hello,
There's only me, it's not open source. I'm actually working on it, but right now I'm applying skyrails to protein interactome visualization.
If you're asking whether there's much work put into skyrails, then yes, I've been working on it. It's not released though, and I don't know if I want to release it with the skyrails language the way it is.
I don't think I'll ever make it open source. Making it publicly available for non-commercial and scientific use is a given though, but right now there's quite a bit of stuff to clean up before releasing the next version.
Cheers