This is just a tracking task with blocking subtasks to track all the work that needs to happen before we can deploy to production
Here is the current deployment timeline:
[X] Oct 29 - Nov 4: Parsoid/PHP deployed to the Parsoid cluster to process all changeprop traffic (mirrored from Parsoid/JS) from 10% to 100%.
[X] Nov 19: Parsoid/PHP deployed to testwiki and test2wki (VE, Content Translation use Parsoid/PHP).
[X] Nov 21: Parsoid/PHP deployed to mediawiki.org (VE uses Parsoid/PHP).
[X] Nov25: Parsoid/PHP to be deployed to all private wikis (VE, Flow, Content Translation use Parsoid/PHP). An attempt on Nov 21 was rolled back because of T238849.
[x] Nov 26: Enable Parsoid/PHP use for Flow on mediawiki.org
 Nov 26: Parsoid/PHP to be deployed to group 0 and group 1 wikis (VE, Content Translation , Media Content Service, Flow use Parsoid/PHP). We have effectively deployed to [[https://wikitech.wikimedia.org/wiki/Deployments/One_week|all group 0 wikis]] since all the other closed wikis will have no impact from the switchover.
 Week of Dec 2: Parsoid/PHP to be deployed on all other wikis. The pace of deployment depends on the the outcome of the previous steps. If necessary, we'll continue into the next week.