Very cool. I mainly use Extempore [1] for livecoding visual and audio, but this would be a great complement to Tidal [2], a Haskell-based livecoding system for audio.
I wonder how difficult it would be to marry the two, instead of separate windows with web sockets, so you could inline Tidal code as you build your shader in the same editor? Sort of what Shadertone [3] does by combining the Clojure-based audio generating Overtone, with a Shadertoy GLSL interface. The graphics are right behind the text in the editor window.
I would suggest Euterpea [4], the Haskell-based music coding environment, but it is not as suited to livecoding as Tidal is. Nonetheless, a great Haskell environment. Great work!
[1] http://extempore.moso.com.au/