Is there a tutorial how to build a design from scratch with the node editor?
So building a parametric sketch. Then applying parametric features to that, etc. (On first sight most examples for graphic primitives like Polyline etc. in the overview from Pilou start with existing, "selected" geometry.)
Something really basic that can act as how-to cookbook, like the introductory examples from this code cad: https://build123d.readthedocs.io/en/latest/introductory_examples.html