phosh uses Dbus interface to blend with GNOME services phoc (wayland phone compositor) is invoked using gnome-session. gnome-session contains the GNOME session manager, as well as a configuration program to choose applications starting on login. https://gitlab.gnome.org/GNOME/mutter - Mutter is a Wayland display server and X11 window manager and compositor library used by gnome-shell. But phosh uses phoc GTK Dev Install builder (gnome-builder)

Links https://phosh.mobi/ https://puri.sm/posts/phosh-overview/ https://gitlab.gnome.org/World/Phosh https://www.gtk.org/ https://gitlab.gnome.org/World/Phosh/phosh/-/wikis/home Components phosh phoc - wayland compositor