i had so much stuff in my current repo that i figured it would be good to trim it down for a workbench. So here is the new repo for the workbench. I call it Silk, and the underlying library is now called ArachNURBS.
Installation should be a simple matter of cloning the repo to your FreeCAD user Mod folder.
The only real functional change compared to the old repo is that the object display properties are automatically set to something i find reasonable.
on the Silk page there is a link to the old project with the old tutorials. All the old tutorials are still valid, if you skip the setup phase, and all the instructions about colors and display modes.
Silk provides very granular objects and clean parametric linking between these objects. At this time there is no built in object nesting, and high level objects need to be fed pre-existing lower level objects. NURBS have a vertical learning curve anyway you go about it, and i hope Silk can be a ladder for that vertical slope.