Developer services

The MediaWiki source code is maintained in mediawiki/core on Gerrit.

Gerrit does host many other repositories, which you can find at https://gerrit.wikimedia.org/r/admin/repos.

Note that while the Gerrit repositories are mirrored to GitHub you cannot contribute there, you have to contribute on Gerrit.

Wikimedia is planning to migrate to GitLab, some repositories can already be found at https://gitlab.wikimedia.org.

You can search all the code with MediaWiki code search (see Codesearch for more info).