"Right now, we've got line, ellipse, perspective, spline and more shapes to help you setting up your drawing. But it would be really flexible if we could take any vector shape and convert the outline to an assistant. And that's what this stretch goal is all about!"

Implies:

• Some context menu thing to turn shapes into assistants. We have spline and ruler, so the big issue is dividing the shape up and then drawing the nodes.