Whenever a new task is released by the Growth-Team, it is necessary to add it to the MediaWiki:NewcomerTasks.json config file on all the projects. This can be done relatively easily with the GrowthExperiments:changeWikiConfig.php maintenance script, but it still requires an on wiki edit, which sometimes blocks other teams (T341150) and/or causes production errors (T337330).

We should add defaults for each task type on the code level. Especially for structured tasks, this will guarantee it works well out of the box, and configuration changes will only become necessary occasionally.