Well, this looks quite interesting. I've never used a node-based editor before and I've been using Photoshop since the 90s, and haven't used much else so I don't know what I'm missing.
I took a look at the demo and at first glance, it looks like the current version is just a basic image editor. I don't see any options to add noise, blur, filters, etc.
Also, curious to know about the graphite fileformat. When editing an image, are the set of transformations, etc. suitable for version control?
I love the fact that this exists, however my major concern is that because this is self-hosted, in the event of a dispute, the other party can claim that I forged the document. In such a scenario, how would I ever prove that I didn't?