Hello!
Earlier today the GlobalUserPage extension was deployed to test.wikipedia.org, test2.wikipedia.org, and test.wikidata.org. GlobalUserPage "transcludes" the contents of your userpage on other public Wikimedia wikis if a local user page does not exist.
For example, my userpage on test.wikidata.org[1] is displaying the content from test.wikipedia.org[2]. During the test phase, test.wikipedia.org is the central wiki. When we deploy the extension to all wikis, Meta will become the central wiki (and existing global user pages on test.wikipedia.org will not be migrated).
Documentation about the various features can be found on mediawiki.org[3]. Please test the extension and if you find any bugs or issues, they can be reported in Phabricator[4]. You can also subscribe to [5] to track the full deployment of GlobalUserPage.
[1] https://test.wikidata.org/wiki/User:Legoktm [2] https://test.wikipedia.org/wiki/User:Legoktm [3] https://www.mediawiki.org/wiki/Help:Extension:GlobalUserPage [4] https://phabricator.wikimedia.org/maniphest/task/create/?projects=PHID-PROJ-... [5] https://phabricator.wikimedia.org/T72576
Thanks, -- Legoktm