Heads up: phosh-osk-stub moved out of #phosh's repo and to: gitlab.gnome.org/guidog/phosh-… as it acquired more and more cruft while debugging some (now fixed) touch input related issues in #gtk 4.

Mostly mentioning it here since some distros (such as #debian) used it in the past on architectures that had trouble building #rust to fulfill session dependencies (which is not an issue anymore nowadays) so it can safely be dropped.