The Growth team will be writing a maintenance script writing default on-wiki configuration page, populated with per-wiki defaults, appropriate for the project the features are deployed on.
Open question summary
How will we determine set of per-wiki defaults that will be written to the wiki. I assume we want to use Wikidata items to provide the defaults, but what should be the exact variables used?
See T275086: Decide which configuration settings should be managed on-wiki for decision on which configuration variables should be managed on-wiki, and which will still be in server configuration.