List extensions

Different versions of Snapcraft and its various cores support different extensions. To list all extensions supported by the installed version of Snapcraft, run:

snapcraft list-extensions

The output includes all extensions, both stable and experimental, without differentiating them.

Extension name          Supported bases----------------------  ------------------------------env-injector            core24flutter-beta            core18flutter-dev             core18flutter-master          core18flutter-stable          core18gnome                   core22, core24gnome-3-28              core18gnome-3-34              core18gnome-3-38              core20kde-neon                core18, core20, core22, core24[...]

For the full reference for this command, see list-extensions.