## Instrumentation specification
https://docs.google.com/spreadsheets/d/1NYXdA5-lp3DN75COEIw_pPsNhOSrA-73vFIhA-j5Zks/edit?gid=0#gid=0
## Acceptance criteria
[ ] Experiment is implemented in code
[ ] Users in Control (`control`) group get status quo (default) experience
[ ] Users in treatment variation group(s) get appropriate changes in experience
[ ] Experiment tracking key and variation keys are aligned with the values in the linked instrumentation spec
[ ] Instrumentation spec is implemented and tested
[ ] `experiment_exposure` events sent when user experience diverges between variations (see [[ https://wikitech.wikimedia.org/wiki/Test_Kitchen/Experiment_exposure_logging | guide ]])
[ ] All events in the spec are marked `Yes (done)`
[ ] All specified events fire in relevant scenarios and user interactions
[ ] All events data appears to be accurate and includes all the specified interaction data
[ ] Instrumentation checks user eligibility in experiment epic (see T428498)
[ ] Experiment is configured in GrowthBook: [TODO: Replace with URL of experiment in GB]
[ ] Details match those in T428498
[ ] Tracking key and variation keys are aligned with the values in the linked instrumentation spec
[ ] Variations have images added to show the change(s) being tested
[ ] Create a Phab task to clean up experiment code after the experiment is over: [TODO: Task]