I work with Jon Agirre at the University of York and am about to start work on developing a privateer bundle for ChimeraX for glycan validation. I have been working through some of the very helpful tutorials and was planning to work through this page as I started building the bundle: https://www.rbvi.ucsf.edu/chimerax/docs/devel/writing_bundles.html
I tried to download the sample code (https://www.cgl.ucsf.edu/chimerax/cgi-bin/bundle_sample.zip) linked in the "Bundle Sample Code" section so that I could use it as a starting point to edit for the privateer bundle, but it seems that the sample code is not currently available.