=== Deployment timing
//Provisional// date: **Monday, 29 September 2025**
WARNING: @ppelberg to confirm state date
=== Bucketing criteria
NOTE: the requirements below are borrowed directly from T384372. We'll consider these Requirements "final" once @MNeisler has reviewed these and removed this warning.
**Bucketing Requirements:**
* Bucketing should include both registered and unregistered users at all identified "Participating wikis" below.
* All users, who are editing a **desktop or mobile** main namespace page (NS:0), at any of the participating wikis should have a 50% chance of being included/bucketed into the A/B test's control or treatment group.
* Bucketing should be done on a per-Wikipedia basis. 50% of people within a given wiki should be placed within the control group; 50% should be bucketed in the treatment group
* The test group should have Paste Check experience enabled while the control group should not
* People should remain in the same test group for the duration of the test (and across sessions and pages).
NOTE: We need to specify the experiences that will be available in both the test and the control groups. For example, will all wikis in the control group have access to Multi-Check (References)?
=== Instrumentation-Related Requirements
* A bucket is applied to these events so we can distinguish all events logged for the control group and the test group within the A/B test.
* The bucket should be descriptive of the test in case there are overlapping AB tests.
* The `anonymous_user_token` field is populated for unregistered users in the test.
=== Participating wikis
|Wiki|Status|Notes
|---|---|---
//TODO: populate table above with contents of T403680.//