Hi all; it’s been a while, I’ll admit. Clutter has been in deep maintenance mode since 2016, when 1.26 was released. I formalised this in 2019, when I updated the README, mostly because people are still filing bugs related to GNOME Shell in the Clutter and Cogl issue trackers. Starting from GNOME 42, Clutter and its related libraries: Cogl Clutter-GTK Clutter-GStreamer have been removed from the G
