Engineering notes:

We have two flags in place that were originally used to prevent users in one experiment from being assigned to another: sawAltTextImageRecommendationsPrompt and sawAltTextArticleEditorPrompt. They continue to act as guards against re-assigning. I tested until I was randomly assigned to the alt text experiment. Then, I updated the percentage to 100%. These guards prevented me from seeing it again, so it would be a one-line change. That would prevent users in the alt-text experiment from being reassigned, but they would also not be assigned to the regular edit experiment.
For users assigned to control, we have logic preventing them from being reassigned to another bucket. The percentage change does not alter that, so these users will not be sorted into an experiment bucket.
It'll work for users who have never entered the experiment logic. For users that already went through it, nothing changes with the percentage update alone, regardless of being in a control group. It would require more logic changes.
Edit: we're ok with users who were assigned in control for one task not being assigned to the test group for the same task.

mazevedofs opened https://github.com/wikimedia/wikipedia-ios/pull/5001

tonisevener closed https://github.com/wikimedia/wikipedia-ios/pull/5001

Appears to be working on 7.6.0 (4184)