MarsSeed [1] filed a deletion request for psm-git [2]:
Upstream not maintained since 7 years ago, and this AUR build is even
older, because it uses empty strings ('') in arrays, therefore it has
been failing PKGBUILD validation for close to a decade now.
I don't think anyone wants to use this on AUR, so i think it's better
to retire it.
(Otherwise, anyone can revive the package from AURgit in any number of
years in the future.)
[1] https://aur.archlinux.org/account/MarsSeed/
[2] https://aur.archlinux.org/pkgbase/psm-git/