@tnt For LibreSilicon we are developing an automated Standard Cell Library Generator, and the Build-Report is for reporting the standard cells, any build problems and the resulting output files there. You can see it here:
https://pdk.libresilicon.com/ Now I started to adapt the Build-Reporting tool for Sky130 to document the published Cell library, later on we also want to adapt our Standard Cell Library Generator for Sky130, then we will also deliver new generated Standard Cell Libraries for Sky130.