Infer schema_id from the selected stream_name via Test Kitchen poller
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	Sfaci
	Jul 1 2026, 10:14 AM

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Aklapper

Sfaci

Description

Now that we are encouraging teams to use base streams and GrowthBook UI is only offering those ones when registering an experiment, it makes sense to remove schema_id as a custom field. That value can be inferred from the selected stream_name + the current version (where we are not expecting changes).

Acceptance criteria

stream_id Custom Field has been removed from GrowthBook UI
The schema_id for an experiment has been set before being added to experiments_cache. The value is based on the selected stream_name + the current version for that stream
The Custom Field in GrowhtBook UI, where schema_id is chosen, has been removed

Details

Related Changes in Gerrit:

	Subject	Author	Repo	Branch	Lines +/-
	Test Kitchen UI: Deploy v1.5.2 release to production	Clare Ming	operations/deployment-charts	master	+2 -2
	Test Kitchen UI: Deploy v1.5.0 release to staging	Clare Ming	operations/deployment-charts	master	+2 -2

Customize query in gerrit

Event Timeline

Sfaci created this task.Jul 1 2026, 10:14 AM

Restricted Application added a subscriber: Aklapper. · View Herald TranscriptJul 1 2026, 10:14 AM

Sfaci updated the task description. (Show Details)Jul 1 2026, 10:15 AM

Sfaci updated the task description. (Show Details)

Sfaci set the point value for this task to 2.Jul 1 2026, 4:09 PM

Sfaci added a project: Essential-Work.Jul 2 2026, 4:07 PM

cjming claimed this task.Jul 2 2026, 10:57 PM

cjming moved this task from Ready for Development to In Progress on the Test Kitchen (Experiment Platform Sprint 26) board.

I'm probably forgetting the context for this ticket - are we sure we don't want to support custom schema ids? it seems like if the base schemas for whatever reason don't capture enough info, that we would still want to enable product teams to use custom schemas for edge cases?

cjming opened https://gitlab.wikimedia.org/repos/data-engineering/test-kitchen/-/merge_requests/366

experiments: Infer schema_id from stream_name in the poller

cjming moved this task from In Progress to Needs Review on the Test Kitchen (Experiment Platform Sprint 26) board.Jul 7 2026, 6:24 AM

In T430795#12093100, @cjming wrote:

I'm probably forgetting the context for this ticket - are we sure we don't want to support custom schema ids? it seems like if the base schemas for whatever reason don't capture enough info, that we would still want to enable product teams to use custom schemas for edge cases?

Yes, you are fully right. But it seems that we expect very few changes and the general case would be just using the base streams/schemas. The stream_name Custom Field in GB was already set like a closed list where only product_metrics.web_base and product_metrics.app_base are the possible values. Of course, when needed, we could update and add new streams/schemas. But also, I do remember we talked about encouraging people to use base streams/schemas so this decision would be pretty aligned with that.

For more context, this is the conversation where were we discussed it

Sfaci updated the task description. (Show Details)Jul 9 2026, 1:54 PM

KReid-WMF moved this task from Needs Review to BLOCKED on the Test Kitchen (Experiment Platform Sprint 26) board.Jul 13 2026, 3:24 PM

KReid-WMF edited projects, added: Test Kitchen (Experiment Platform Sprint 27); removed: Test Kitchen (Experiment Platform Sprint 26).Jul 16 2026, 4:06 PM

KReid-WMF moved this task from Ready for Development to BLOCKED on the Test Kitchen (Experiment Platform Sprint 27) board.

KReid-WMF moved this task from BLOCKED to In Progress on the Test Kitchen (Experiment Platform Sprint 27) board.Jul 20 2026, 3:11 PM

cjming moved this task from In Progress to Needs Review on the Test Kitchen (Experiment Platform Sprint 27) board.Jul 21 2026, 5:59 AM