What are people using for schematic entry? I saw xschem mentioned, which seems very... dated. Or are y'all just writing netlists with magnetic needles and all that? I also noticed that there do not appear to be any symbols present. Is this something that could be extracted from proprietary formats in the commercial PDK, or do we need to make our own? My unfounded impression is that maybe KiCad's eeschema could be made to support sky130? It has a mature and maintained schematic editor which already integrates with ngspice.