I also came across this post from 2018 from Andras ... https://orgmode.org/list/87in8jaywk....@all.hu/
... which includes a link to his proposal on what we now call styles, but there he calls (a la the TeX world) commands: https://github.com/andras-simonyi/citeproc-el/wiki/Citation-types-and-commands There, he includes "suppress author" as one among those. Bruce