=== Deployment timing
**Tuesday, 21 April 2026**
WARNING: this date will not be considered final until @ppelberg removes this warning label.
=== Announcement(s)
//See T420667.//
=== Bucketing criteria
**Bucketing Requirements:**
* Bucketing should include both registered and unregistered users with 100 or fewer edits at first exposure. This will require the use of the [edge-unique ](https://wikitech.wikimedia.org/wiki/Test_Kitchen/Conduct_an_experiment#Experiment_design:_identifier_type) identifier type.
* Only users at participating Wikipedias as identified in T420664
* All users, who are editing a **mobile web or desktop** main namespace page (NS:0) using the visual editor, at any of the Wikipedias should have a 50% chance of being included/bucketed into the A/B test's control or treatment group.
* The treatment group should have Edit Suggestions enabled while the control group will not.
* Each device should remain in the same test group for the duration of the test (and across sessions and pages). Note: If the cookie is cleared manually or automatically – by, for example, a privacy enhanced browser – the client is issued a new wmf-uniq cookie, and they may or may not end up enrolled or even assigned to the same group.
=== Instrumentation Requirements
* Ensure Test Kitchen stream is configured appropriately
* .
* .
=== Participating wikis
| ID | [[https://translatewiki.net/wiki/Special:MessageGroupStats?group=ext-visualeditor-ve-mw-editcheck&messages=&suppressempty=1&x=D|UI % transl.]] | [[https://global-search.toolforge.org/?q=.*®ex=1&namespaces=8&title=Editcheck-config.json|json ready]]
|---|---|---
| en.wiki | - | [[https://en.wikipedia.org/wiki/MediaWiki:Editcheck-config.json|good]]
| fr.wiki | 94% | [[https://fr.wikipedia.org/wiki/MediaWiki:Editcheck-config.json|good]]
| de.wiki | 100% | [[https://de.wikipedia.org/wiki/MediaWiki:Editcheck-config.json|needs work]]
| ja.wiki | 97% | [[https://ja.wikipedia.org/wiki/MediaWiki:Editcheck-config.json|needs work]] (requested)
| es.wiki | 93% | [[https://es.wikipedia.org/wiki/MediaWiki:Editcheck-config.json|good]]
| ru.wiki | 61% | [[https://ru.wikipedia.org/wiki/MediaWiki:Editcheck-config.json|good]]
| pt.wiki | 29%/76% | [[https://pt.wikipedia.org/wiki/MediaWiki:Editcheck-config.json|needs work]]
| zh.wiki | 89% | TKTK
| it.wiki | 51% | TKTK
| pl.wiki | 97% | [[https://pl.wikipedia.org/wiki/MediaWiki:Editcheck-config.json|needs work]]
| nl.wiki | 100% | [[https://nl.wikipedia.org/wiki/MediaWiki:Editcheck-config.json|needs work]]
| he.wiki | 93% | [[https://he.wikipedia.org/wiki/%D7%9E%D7%93%D7%99%D7%94%20%D7%95%D7%99%D7%A7%D7%99:Editcheck-config.json|needs disambig]]
| ar.wiki | 100% | [[https://ar.wikipedia.org/wiki/%D9%85%D9%8A%D8%AF%D9%99%D8%A7%D9%88%D9%8A%D9%83%D9%8A:Editcheck-config.json|good]]
| cs.wiki | 82% | [[https://cs.wikipedia.org/wiki/MediaWiki:Editcheck-config.json|needs work]]
| ko.wiki | 89% | TKTK
| vi.wiki | 67% | TKTK
| bn.wiki | 45% | TKTK
| sv.wiki | 84% | TKTK
NOTE: List of wikis was finalized via T420664.
=== Open question(s)
- [ ] 1. Will non-cache splitting be available by the time the controlled experiment is scheduled to begin?
-- Update expected from Experiment Platform Team by EOD Friday, 3 April 2026.
- [ ] 2. If the answer to "1." is "No." and we move forward with cache splitting, what % of traffic (at en.wiki) will we sample?