In order to make it easier to test these variants, including their onboarding flow, we want to create a query string parameter that we can use during account creation, so that we can kick off the full experience right at the beginning of the flow.
|mediawiki/extensions/GrowthExperiments||master||+36 -10||Add a flag for forcing a given A/B test variant on account creation|
@Tgr -- I think you're asking whether we need to record whether people have set their own variants through using these query parameters? I do not think we do because very few people will actually wield these new parameters, and also because our analytics filters out known test accounts that contain words like "Zilant" and "Test".
To use, add a geForceVariant parameter to the URL which renders the account creation form (e.g. https://en.wikipedia.beta.wmflabs.org/wiki/Special:CreateAccount?geForceVariant=A or https://en.wikipedia.beta.wmflabs.org/w/index.php?title=Special:CreateAccount&returnto=Main+Page&geForceVariant=C).