Part of https://www.mediawiki.org/wiki/Phabricator/Plan
The current plan (in progress):
- The migration of Bugzilla and RT are required for Day 1.
- There is no mass migration from Trello and Mingle projects. Some teams are more interested than others in total / partial migration. One idea is to write the Bugzilla migration script with an abstraction layer that could be fine tuned for RT, Mingle, Trello.
- The migration of Gerrit and Jenkins is out of scope for Day 1.