Description

T424350: Incremental MediaWiki History Phase I uses a combination of events and database snapshots to reconstruct the full MediaWiki History. The mediawiki_history dataset contains an event based view of state changes to pages, users and revisions.

We need to emit user change event data for T424350: Incremental MediaWiki History Phase I.

In T423952: Create mediawiki.user_change event stream, the Data Engineering team is developing a new user change event stream. This stream is currently emitted using a variety of hooks, including ManualLogEntryBeforePublishHook.

It would be much cleaner and better if MediaWiki modeled and emitted user relate state change DomainEvents that we could subscribe to.

https://www.mediawiki.org/wiki/Manual:Domain_events/Hierarchy#User_Account_Events

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Status	Assigned	Task
Open	None	T428273 Incremental MediaWiki History Phase II
Open	None	T291120 MediaWiki Event Carried State Transfer - Problem Statement
Open	Ottomata	T423935 Incremental MWH - MediaWiki event data source improvements
Open	Ottomata	T423952 Create mediawiki.user_change event stream
Open	None	T427817 MediaWiki DomainEvents - Create new User related DomainEvents
Open	Ottomata	T424887 MediaWiki state change streams- add access_method & platform details
Open	Ahoelzl	T429211 Track mobile app and api account registration separately
Open	tchin	T425029 mediawiki.page_change.v1 - add revision.editor.first_edit_dt field
Open	Ottomata	T423583 mediawiki.page_change.v1 event - Add revision revert details
Declined	Ottomata	T426998 mediawiki.page_change.v1 event - Add user first_registration_dt field
Open	None	T425996 Add log_id to mediawiki page_change and user_change events
Open	None	T427815 MediaWiki DomainEvents - Include LogEntry
Open	Ottomata	T428176 mediawiki.page_change.v1 events - add wikidata id for pages
Open	Ottomata	T430967 MediaWiki state change events - emit global edit count
Open	None	T432050 EventBus - move event producers to a different extension

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Ottomata created this task.Jun 1 2026, 2:19 PM

Restricted Application added a project: Data-Engineering. · View Herald TranscriptJun 1 2026, 2:19 PM

I'm unclear whether Data Engineering is planning to do this work, or is requesting MediaWiki Interfaces to do it. I see the task in Backlog on a DPE board, so I'm assuming the former and putting this in MWI's Radar column. If that's incorrect, please adjust.

I created this task as a way to start having that convo. I think it will have to be a cross team effort. I expect this work to be prioritized (or not) via the usual OKR process.

In T427817#11977933, @Ottomata wrote:

I created this task as a way to start having that convo. I think it will have to be a cross team effort. I expect this work to be prioritized (or not) via the usual OKR process.

Thanks. Moving to our "Needs Further Discussion" column.

Ottomata moved this task from Incoming (new tickets) to Next Up on the Data-Engineering board.Jun 10 2026, 6:00 PM

Ottomata mentioned this in T423935: Incremental MWH - MediaWiki event data source improvements.Jun 10 2026, 11:59 PM

@Ottomata would you like me to set up some discussions with the mw team so we can kick off collaboration?

Is there an OKR this is associated with?

Hm, maybe not directly, but this work supports metrics for any KR that needs info about user account change (account registrations, group changes, blocks, renames, etc.). Maybe DE1.5?

Ottomata mentioned this in T427815: MediaWiki DomainEvents - Include LogEntry.Tue, Jul 14, 5:48 PM

MediaWiki DomainEvents - Create new User related DomainEventsOpen, Needs TriagePublicActions

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MediaWiki DomainEvents - Create new User related DomainEvents
Open, Needs TriagePublic
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