In Fiscal Year 2017-18 Q2 (Oct-Dec), within TP1 (Technology Program 1), the CTO team is responsible for one goal in this table: https://www.mediawiki.org/wiki/Wikimedia_Technology/Goals/2017-18_Q2#Program_1:_Availability.2C_performance.2C_and_maintenance
Plan for when HHVM no longer supports PHP5
- Officially decide on our path forward (e.g. "migrate to Zend/PHP7")
- Identify the work that will be required to implement that decision at a very high level