The one thing GNOME is infamously not fond of. Sadly, it's the only way we can manage to make Ghostty feel truly native as different desktop environments enforce different but uniform decoration styles, that preserve the overall design language of the system — disabling Adwaita is a possible alternative today but that also removes way too many quality-of-life features (tab overviews, toasts, etc.)

On Wayland, as discussed in #4361, we can use the xdg-decoration protocol that everyone except GNOME implements (of course). I'm not sure what the correct X11 APIs are for this, but having it at all on Wayland would be great.