Right now, we have a couple of variables that need (or can) be configured for any given wiki running GrowthExperiments. We need to decide which configuration settings should be maintained on-wiki, and which should be maintained in the server configuration (ie. only by us).
Have a decision about which config variables will be managed by communities on-wiki, and which will be managed by Growth-Team in the server configuration. Implementation is out of scope here, and will be carried out in the parent task.
List of configuration options
In addition to the "classic" config variables set in extension.json, there is GrowthExperiments-NewcomerTasks configuration, which is already on-wiki (cf. https://cs.wikipedia.org/wiki/MediaWiki:NewcomerTasks.json), and it should be kept on-wiki.