The Jade extension now has a repository at the "Jade" name.
When I go to https://github.com/wikimedia/mediawiki-extensions-Jade (note the lack of all-caps) it automatically points to https://github.com/wikimedia/mediawiki-extensions-JADE (note the all-caps).
@thcipriani @mmodell do you know what needs to happen for this change to take effect?