You should do whatever works best in your case.
For me it was about building a template package from where I took over the bits into my package. In fact, I followed the vignette from rstantools and even automated building that test package. Attached is the R file for that. In the process of doing that I figured out what was important (the NAMESPACE file must contain a certain minimum).
So maybe just get started and let us know where you get stopped and how. In case all is smooth, then that’s welcome news as well.
Thanks for porting things over as asked for!
rstantools.R (1.6 KB)