Brickimedia extensions and skins are now hosted on Gerrit. See the GitHub mirror: https://github.com/wikimedia/mediawiki-extensions-GlobalContribs
GlobalContribs introduces two new special pages to MediaWiki, GlobalContributions and GlobalEditcount. Both behave exactly the same as their standard counterparts.
There is just one config variable,
$gcwikis, a list of DB names to look for contribs in.
Read the docs at MediaWiki.org for more information. https://www.mediawiki.org/wiki/Extension:GlobalContribs