=== Deployment timing
!!**Wednesday, 8 October 2025**!!
=== Tech/News Announcement
//@Trizek-WMF to draft.//
=== Bucketing criteria
**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
NOTE: List of wikis was finalized via T403680.
| ID | Wiki |
|----|------|
| **1.** | de.wiki |
| **2.** | pl.wiki |
| **3.** | id.wiki |
| **4.** | vi.wiki |
| **5.** | tw.wiki |
| **6.** | simple.wiki |
| **7.** | it.wiki |
| **8.** | nl.wiki |
| **9.** | cs.wiki |
| **10.** | uk.wiki |
| **11.** | ru.wiki |
| **12.** | bn.wiki |
| **13.** | hi.wiki |
| **14.** | zh.wiki |
| **15.** | ar.wiki |
| **16.** | fa.wiki |
| **17.** | sw.wiki |
| **18.** | dag.wiki |
| **19.** | fon.wiki |
| **20.** | ca.wiki |
| **21.** | eu.wiki |
| **22.** | gl.wiki |