Last modified: 2013-10-18 18:35:32 UTC
Special:Categories should allow filtering by prefix. Currently it allows offset only (via Special:Categories/<offset> as well as param in query string), which is actually less practical and useful than prefix. I can't find any example of practical usage of the offset linking via Special:Categories/<offset> - always intended to display categories having given prefix, so this URL call can be changed to prefix instead of offset behavior. However, if from some reasons it will be decided to keep it this way, then some URL like Special:CategoriesPrefix/<prefix> should be created instead.
Isn't Special:PrefixIndex/Category:<prefix> sufficient for that?
Nope, since that one displays *existing category pages whether the category is empty or not* onlike Special:Categories, which displays *categories with at least one member whether the category page exists or not*.