Hi Romuald,
I literally just made a new topic about that in this forum 
I can’t tell you when that tool will be available. For now it is for my own use to be able to create and test shader definitions much faster. I make it now so it suits my needs so that I can fix shader troubles like the one you reported in here 
There’s still some open issues that needs to be addressed before cool things like my Grasshopper shader graph plug-in becomes an item for the public. But be sure to keep poking me! 
Cheers,
/Nathan