https://github.com/KDE/kactivitymanagerd links https://invent.kde.org/plasma/kactivitymanagerd but this link is not working. First it got 502 error, then it has “Firefox can’t establish a connection to the server at invent.kde.org.”
https://community.kde.org/Infrastructure/Github_Mirror is proposed to be deleted but it is linked from https://github.com/KDE
(not sure is it the best place to report this kind of issues - and https://bugs.kde.org/enter_bug.cgi?classification=I%20don%27t%20know told me to go to forums)
(disabled links as otherwise forum would not allow me to post)