Manual:$wgRCWatchCategoryMembership

Recent changes, new pages, watchlist and history: $wgRCWatchCategoryMembership
Treat category membership changes as a RecentChange.
Introduced in version:1.27.0 (Gerrit change 239065; git #d40cd42b)
Removed in version:Still in use
Allowed values:(boolean)
Default value:false

See Manual:CategoryMembershipChanges .