Requests for comment
Requests for Comments (RFC) are used by the Wikimedia Technical Committee to track technical decisions within the committee's scope that are strategic, cross-cutting, or hard to undo. Such decisions about software maintained by Wikimedia should follow the RFC process.
Other changes to MediaWiki (and other Wikimedia software), including bug fixes, optimizations, and documentation improvements, can be submitted to Gerrit and follow the normal code review process.
Active and Archived RFCs
RFCs started in 2015 or later are tracked in Phabricator (list).