Based on the script code the Theme namespace is 2600 and then Theme discussion page should be 2601. Yet I don't see it being used anywhere and usercontribs silently ignores any Flow desk/theme post as a project contribution (https://ru.wikipedia.org/w/api.php?action=query&format=xml&continue=&list=usercontribs&uclimit=100&ucuser=Neolexx) Is it a bug or by design?