Jdforrester-WMF (James D. Forrester)
Software Engineer

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User Details

User Since: Oct 6 2014, 10:08 PM (619 w, 2 d)
Availability: Available
IRC Nick: James_F
LDAP User: Jforrester
MediaWiki User: Jdforrester (WMF) [ Global Accounts ]

I've been a Wikipedia editor since 2002 on the English Wikipedia and a few other Wikimedia projects. In May 2012, I joined the Wikimedia Foundation as a "product manager", initially for VisualEditor, the the Editing Team, and later the lead product manager for all contribution. In 2018, I moved to be a software engineer, working on reliability, infrastructure, developer tooling, and continuous integration and deployment.

My job is to help ensure that the tools we provide to our readers and contributors are the best the can be, in speed, correctness, consistency, utility, and reliability.

Recent Activity
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Yesterday

Jdforrester-WMF moved T435331: Lexeme Sense selector component doesn't load the first time from Incoming to In Code review on the Abstract Wikipedia team (27Q1 (Jul–Sep)) board.

Wed, Aug 19, 6:37 PM · Abstract Wikipedia team (27Q1 (Jul–Sep)), Patch-For-Review, WikiLambda Front-end

Jdforrester-WMF changed the status of T435332: Allow pasting URLs into Reference/Function input components from Open to In Progress.

Wed, Aug 19, 6:37 PM · Patch-For-Review, Essential-Work, Abstract Wikipedia team (27Q1 (Jul–Sep)), WikiLambda Front-end

Jdforrester-WMF changed the status of T435332: Allow pasting URLs into Reference/Function input components, a subtask of T432195: [EssentialWork] Support core Contributors, from Open to In Progress.

Wed, Aug 19, 6:37 PM · Essential-Work, Epic, Abstract Wikipedia team (27Q1 (Jul–Sep))

Jdforrester-WMF changed the status of T435331: Lexeme Sense selector component doesn't load the first time from Open to In Progress.

Wed, Aug 19, 6:36 PM · Abstract Wikipedia team (27Q1 (Jul–Sep)), Patch-For-Review, WikiLambda Front-end

Jdforrester-WMF moved T435332: Allow pasting URLs into Reference/Function input components from Ready to In Code review on the Abstract Wikipedia team (27Q1 (Jul–Sep)) board.

Wed, Aug 19, 6:36 PM · Patch-For-Review, Essential-Work, Abstract Wikipedia team (27Q1 (Jul–Sep)), WikiLambda Front-end

Jdforrester-WMF updated subscribers of T433592: Re-build integration-cumin.integration.eqiad1.wikimedia.cloud on something newer than bullseye.

OK, newly-re-created integration-cumin-01 is now set up, with the same cert. I think we "just" need to change it in the profile::openstack::eqiad1::cumin::project_pub_key project puppet, and in the fab script in the repo. @hashar, does that sound right to you?

Wed, Aug 19, 5:53 PM · Cloud-VPS (Debian Bullseye Deprecation), Continuous-Integration-Infrastructure

Jdforrester-WMF added a comment to T433592: Re-build integration-cumin.integration.eqiad1.wikimedia.cloud on something newer than bullseye.

Aha! OK, that's fine.

Wed, Aug 19, 5:37 PM · Cloud-VPS (Debian Bullseye Deprecation), Continuous-Integration-Infrastructure

Jdforrester-WMF added a comment to T433592: Re-build integration-cumin.integration.eqiad1.wikimedia.cloud on something newer than bullseye.

I applied them but it didn't let me in, so I removed them and it still didn't, so I stopped flailing.

Wed, Aug 19, 5:29 PM · Cloud-VPS (Debian Bullseye Deprecation), Continuous-Integration-Infrastructure

Jdforrester-WMF reopened Restricted Task, a subtask of T421848: [Hypothesis] WE2.3.15 Complete implementation and deployment of Evaluator-Orchestrator callbacks, as Open.

Wed, Aug 19, 5:23 PM · Epic, Abstract Wikipedia team (27Q1 (Jul–Sep)), OKR-Work

Jdforrester-WMF moved T435361: OrchestratorRequest throwing a Server response not wellformed with a badly formed ZError from In Code review to Ready to deploy on the Abstract Wikipedia team (27Q1 (Jul–Sep)) board.

Wed, Aug 19, 5:22 PM · Essential-Work, Abstract Wikipedia team (27Q1 (Jul–Sep)), function-orchestrator

Jdforrester-WMF added a comment to T433592: Re-build integration-cumin.integration.eqiad1.wikimedia.cloud on something newer than bullseye.

I created the instance, but I can't shell into the new box (unlike the old one). Will come back to this after meetings.

Wed, Aug 19, 5:21 PM · Cloud-VPS (Debian Bullseye Deprecation), Continuous-Integration-Infrastructure

Jdforrester-WMF claimed T433631: programmingLanguageVersion metadata is hard-coded and so will likely go wrong without warning on upgrades.

Wed, Aug 19, 5:04 PM · Essential-Work, Patch-For-Review, Abstract Wikipedia team (27Q1 (Jul–Sep)), Abstract Wikipedia Fix-It tasks, function-evaluator

Jdforrester-WMF moved T435332: Allow pasting URLs into Reference/Function input components from Incoming to Ready on the Abstract Wikipedia team (27Q1 (Jul–Sep)) board.

Wed, Aug 19, 5:03 PM · Patch-For-Review, Essential-Work, Abstract Wikipedia team (27Q1 (Jul–Sep)), WikiLambda Front-end

Jdforrester-WMF added a subtask for T432195: [EssentialWork] Support core Contributors: T435332: Allow pasting URLs into Reference/Function input components.

Wed, Aug 19, 5:02 PM · Essential-Work, Epic, Abstract Wikipedia team (27Q1 (Jul–Sep))

Jdforrester-WMF added a parent task for T435332: Allow pasting URLs into Reference/Function input components: T432195: [EssentialWork] Support core Contributors.

Wed, Aug 19, 5:02 PM · Patch-For-Review, Essential-Work, Abstract Wikipedia team (27Q1 (Jul–Sep)), WikiLambda Front-end

Jdforrester-WMF triaged T435332: Allow pasting URLs into Reference/Function input components as Medium priority.

I think this works accidentally for the Wikidata components, but sure.

Wed, Aug 19, 5:02 PM · Patch-For-Review, Essential-Work, Abstract Wikipedia team (27Q1 (Jul–Sep)), WikiLambda Front-end

Jdforrester-WMF triaged T435331: Lexeme Sense selector component doesn't load the first time as Medium priority.

Thanks for spotting!

Wed, Aug 19, 5:01 PM · Abstract Wikipedia team (27Q1 (Jul–Sep)), Patch-For-Review, WikiLambda Front-end

Jdforrester-WMF triaged T435177: Consider explicitly modeling tail recursion as Medium priority.

Wed, Aug 19, 5:00 PM · Abstract Wikipedia Fix-It tasks, function-orchestrator, Abstract Wikipedia team

Jdforrester-WMF moved T435027: apparent difference between performance when tests are run individually or all at once on Wikifunctions from To Triage to Product Backlog on the Abstract Wikipedia team board.

Wed, Aug 19, 4:57 PM · Wikifunctions, Abstract Wikipedia team

Jdforrester-WMF merged T434963: Allow readers and editors to refresh results of transcluded functions into T431432: [Hypothesis] DE2.2.2 - Result freshening.

Wed, Aug 19, 4:55 PM · Epic, OKR-Work, Abstract Wikipedia team (27Q1 (Jul–Sep))

Jdforrester-WMF merged task T434963: Allow readers and editors to refresh results of transcluded functions into T431432: [Hypothesis] DE2.2.2 - Result freshening.

Wed, Aug 19, 4:55 PM · Abstract Wikipedia team, Wikifunctions

Jdforrester-WMF added a comment to T434963: Allow readers and editors to refresh results of transcluded functions.

I think this is covered by the existing work in flight in [T431432} — I'll mark this as a duplicate of that, but if you think it won't cover your use cases please shout.

Wed, Aug 19, 4:55 PM · Abstract Wikipedia team, Wikifunctions

Jdforrester-WMF triaged T434860: AW on a narrow screen (e.g. mobile) should have the article first then the code as Low priority.

Wed, Aug 19, 4:54 PM · Abstract Wikipedia team, Abstract Wikipedia

Jdforrester-WMF triaged T435361: OrchestratorRequest throwing a Server response not wellformed with a badly formed ZError as Medium priority.

Wed, Aug 19, 4:51 PM · Essential-Work, Abstract Wikipedia team (27Q1 (Jul–Sep)), function-orchestrator

Jdforrester-WMF moved T435361: OrchestratorRequest throwing a Server response not wellformed with a badly formed ZError from Incoming to In Code review on the Abstract Wikipedia team (27Q1 (Jul–Sep)) board.

Wed, Aug 19, 4:51 PM · Essential-Work, Abstract Wikipedia team (27Q1 (Jul–Sep)), function-orchestrator

Jdforrester-WMF edited projects for T435361: OrchestratorRequest throwing a Server response not wellformed with a badly formed ZError, added: Abstract Wikipedia team (27Q1 (Jul–Sep)), Essential-Work; removed WikiLambda, function-schemata, function-evaluator, Abstract Wikipedia team.

Wed, Aug 19, 4:50 PM · Essential-Work, Abstract Wikipedia team (27Q1 (Jul–Sep)), function-orchestrator

Jdforrester-WMF closed T433745: Unable to populate nested list on Wikifunctions when the UI component exists on page load ([Object object]-typed list) as Resolved.

Wed, Aug 19, 4:48 PM · Essential-Work, Abstract Wikipedia team (27Q1 (Jul–Sep)), WikiLambda Front-end

Jdforrester-WMF moved T417266: Specifying a Typed pair of Typed lists as a function’s argument type leads to [object Object] “Reference” when used from Ready to deploy to Needs Sign-off on the Abstract Wikipedia team (27Q1 (Jul–Sep)) board.

Wed, Aug 19, 4:48 PM · MW-1.47-notes (1.47.0-wmf.16; 2026-08-18), Abstract Wikipedia team (27Q1 (Jul–Sep)), Essential-Work, function-orchestrator

Jdforrester-WMF moved T432875: Build an AWFragmentStore implementation that uses MainStash as its backend from Ready to deploy to Needs Sign-off on the Abstract Wikipedia team (27Q1 (Jul–Sep)) board.

Wed, Aug 19, 4:48 PM · MW-1.47-notes (1.47.0-wmf.16; 2026-08-18), Abstract Wikipedia team (27Q1 (Jul–Sep)), OKR-Work, WikiLambda

Jdforrester-WMF moved T432873: Build date static analyser for AW Fragments from Ready to deploy to Needs Sign-off on the Abstract Wikipedia team (27Q1 (Jul–Sep)) board.

Wed, Aug 19, 4:48 PM · MW-1.47-notes (1.47.0-wmf.16; 2026-08-18), Abstract Wikipedia team (27Q1 (Jul–Sep)), OKR-Work, WikiLambda

Jdforrester-WMF moved T338250: Handle re-ordering in ZObjectListDiffer from Ready to deploy to Needs Sign-off on the Abstract Wikipedia team (27Q1 (Jul–Sep)) board.

Wed, Aug 19, 4:48 PM · MW-1.47-notes (1.47.0-wmf.16; 2026-08-18), Essential-Work, Abstract Wikipedia team (27Q1 (Jul–Sep)), WikiLambda, Abstract Wikipedia Fix-It tasks

Jdforrester-WMF moved T434117: AbstractWikiRequest::callRenderFunctionCall returning 404 should be treated as any other bad request, currently logging as "unhandled error" from Ready to deploy to Needs Sign-off on the Abstract Wikipedia team (27Q1 (Jul–Sep)) board.

Wed, Aug 19, 4:48 PM · MW-1.47-notes (1.47.0-wmf.16; 2026-08-18), Essential-Work, Abstract Wikipedia team (27Q1 (Jul–Sep)), Abstract Wikipedia Fix-It tasks, WikiLambda Front-end, WikiLambda

Jdforrester-WMF moved T434284: Decouple date from Abstract Wiki Fragment requests from Ready to deploy to Needs Sign-off on the Abstract Wikipedia team (27Q1 (Jul–Sep)) board.

Wed, Aug 19, 4:48 PM · MW-1.47-notes (1.47.0-wmf.16; 2026-08-18), Abstract Wikipedia team (27Q1 (Jul–Sep)), OKR-Work, WikiLambda Front-end, WikiLambda

Jdforrester-WMF closed T435246: Eight orchestrator tests never ran, because runTestOrchestration was called inside it() as Resolved.

Wed, Aug 19, 2:19 PM · Patch-For-Review, Abstract Wikipedia team (27Q1 (Jul–Sep)), function-orchestrator, Essential-Work, Abstract Wikipedia Fix-It tasks

Jdforrester-WMF closed T433444: Explicitly Model Closures and Correct Scope Attachment as Resolved.

Wed, Aug 19, 2:18 PM · Patch-For-Review, OKR-Work, Abstract Wikipedia team (27Q1 (Jul–Sep)), function-orchestrator

Jdforrester-WMF closed T433444: Explicitly Model Closures and Correct Scope Attachment, a subtask of T433272: Memoize Function Calls and Sub-Calls, as Resolved.

Wed, Aug 19, 2:18 PM · OKR-Work, Abstract Wikipedia team (27Q1 (Jul–Sep)), WikiLambda, function-orchestrator

Jdforrester-WMF closed T433444: Explicitly Model Closures and Correct Scope Attachment, a subtask of T433727: Anonymous Functions run into evaluator recursion limits pretty quickly, as Resolved.

Wed, Aug 19, 2:18 PM · Abstract Wikipedia team (27Q1 (Jul–Sep)), OKR-Work, function-evaluator

Jdforrester-WMF closed T428475: Find a better way to do scope surgery than a full asZObject as Resolved.

Wed, Aug 19, 2:18 PM · OKR-Work, Abstract Wikipedia team (27Q1 (Jul–Sep)), Abstract Wikipedia Fix-It tasks, function-orchestrator

Jdforrester-WMF closed T428475: Find a better way to do scope surgery than a full asZObject, a subtask of T433444: Explicitly Model Closures and Correct Scope Attachment, as Resolved.

Wed, Aug 19, 2:18 PM · Patch-For-Review, OKR-Work, Abstract Wikipedia team (27Q1 (Jul–Sep)), function-orchestrator

Jdforrester-WMF closed T375439: Future-Proof MSW Tests against Regressions due to MSW Version as Resolved.

Wed, Aug 19, 2:17 PM · Essential-Work, Abstract Wikipedia team (27Q1 (Jul–Sep)), Abstract Wikipedia Fix-It tasks, function-orchestrator

Jdforrester-WMF closed T327413: Figure out what the "static validation is skipped" test is trying to do; fix and re-enable it or delete it as Resolved.

Wed, Aug 19, 2:17 PM · Essential-Work, Abstract Wikipedia team (27Q1 (Jul–Sep)), Abstract Wikipedia Fix-It tasks, function-orchestrator

Jdforrester-WMF closed Restricted Task, a subtask of T421848: [Hypothesis] WE2.3.15 Complete implementation and deployment of Evaluator-Orchestrator callbacks, as Resolved.

Wed, Aug 19, 2:13 PM · Epic, Abstract Wikipedia team (27Q1 (Jul–Sep)), OKR-Work

Jdforrester-WMF closed T416144: Add support in the Rust evaluator for callbacks as Resolved.

Wed, Aug 19, 2:13 PM · Patch-For-Review, Abstract Wikipedia team (27Q1 (Jul–Sep)), OKR-Work, function-evaluator

Jdforrester-WMF closed T416144: Add support in the Rust evaluator for callbacks, a subtask of T421848: [Hypothesis] WE2.3.15 Complete implementation and deployment of Evaluator-Orchestrator callbacks, as Resolved.

Wed, Aug 19, 2:12 PM · Epic, Abstract Wikipedia team (27Q1 (Jul–Sep)), OKR-Work

Jdforrester-WMF moved T435246: Eight orchestrator tests never ran, because runTestOrchestration was called inside it() from Incoming to Ready to deploy on the Abstract Wikipedia team (27Q1 (Jul–Sep)) board.

Wed, Aug 19, 12:15 PM · Patch-For-Review, Abstract Wikipedia team (27Q1 (Jul–Sep)), function-orchestrator, Essential-Work, Abstract Wikipedia Fix-It tasks

Jdforrester-WMF changed the status of T435246: Eight orchestrator tests never ran, because runTestOrchestration was called inside it() from Open to In Progress.

Wed, Aug 19, 12:15 PM · Patch-For-Review, Abstract Wikipedia team (27Q1 (Jul–Sep)), function-orchestrator, Essential-Work, Abstract Wikipedia Fix-It tasks

Jdforrester-WMF triaged T435247: Type comparison does not check the keys inside a value, so four tests stay disabled as Medium priority.

Wed, Aug 19, 12:14 PM · Essential-Work, Abstract Wikipedia Fix-It tasks, Abstract Wikipedia team, function-orchestrator

Tue, Aug 18

Jdforrester-WMF changed the status of T428917: Consider Stronger Post-Conditions on `realize()` and `fullyRealize()` Operations from In Progress to Open.

Tue, Aug 18, 11:33 PM · Abstract Wikipedia team, Essential-Work, Abstract Wikipedia Fix-It tasks, function-orchestrator

Jdforrester-WMF moved T433632: Cancel in-flight executor tasks on service shutdown from Incoming to In Engineering on the Abstract Wikipedia team (27Q1 (Jul–Sep)) board.

Tue, Aug 18, 11:32 PM · Abstract Wikipedia team (27Q1 (Jul–Sep)), Essential-Work, Patch-For-Review, Abstract Wikipedia Fix-It tasks, function-evaluator

Jdforrester-WMF changed the status of T433632: Cancel in-flight executor tasks on service shutdown from Open to In Progress.

Tue, Aug 18, 11:32 PM · Abstract Wikipedia team (27Q1 (Jul–Sep)), Essential-Work, Patch-For-Review, Abstract Wikipedia Fix-It tasks, function-evaluator

Jdforrester-WMF moved T429214: Abstract Wikipedia; vertical scroll sync between article and preview don't work with large articles from In Engineering to In Code review on the Abstract Wikipedia team (27Q1 (Jul–Sep)) board.

Tue, Aug 18, 11:08 PM · Patch-For-Review, Abstract Wikipedia team (27Q1 (Jul–Sep)), Abstract Wikipedia Fix-It tasks, WikiLambda Front-end, WikiLambda

Jdforrester-WMF closed T432416: definitions: Create new error for callback limit exceeded in evaluator as Resolved.

Tue, Aug 18, 11:06 PM · Patch-For-Review, MW-1.47-notes (1.47.0-wmf.14; 2026-08-04), Abstract Wikipedia Fix-It tasks, Essential-Work, Abstract Wikipedia team (27Q1 (Jul–Sep)), function-schemata, function-evaluator

Jdforrester-WMF added a project to T434284: Decouple date from Abstract Wiki Fragment requests: MW-1.47-notes (1.47.0-wmf.16; 2026-08-18).

Tue, Aug 18, 11:05 PM · MW-1.47-notes (1.47.0-wmf.16; 2026-08-18), Abstract Wikipedia team (27Q1 (Jul–Sep)), OKR-Work, WikiLambda Front-end, WikiLambda

Jdforrester-WMF moved T432847: Collect Wikifunctions and Abstract Wikipedia MainStash metrics from Ready to In Engineering on the Abstract Wikipedia team (27Q1 (Jul–Sep)) board.

Tue, Aug 18, 11:04 PM · Patch-For-Review, Abstract Wikipedia team (27Q1 (Jul–Sep)), OKR-Work, WikiLambda

Jdforrester-WMF claimed T429214: Abstract Wikipedia; vertical scroll sync between article and preview don't work with large articles.

Tue, Aug 18, 11:04 PM · Patch-For-Review, Abstract Wikipedia team (27Q1 (Jul–Sep)), Abstract Wikipedia Fix-It tasks, WikiLambda Front-end, WikiLambda

Jdforrester-WMF changed the status of T429214: Abstract Wikipedia; vertical scroll sync between article and preview don't work with large articles from Open to In Progress.

Tue, Aug 18, 11:04 PM · Patch-For-Review, Abstract Wikipedia team (27Q1 (Jul–Sep)), Abstract Wikipedia Fix-It tasks, WikiLambda Front-end, WikiLambda

Jdforrester-WMF changed the status of T429214: Abstract Wikipedia; vertical scroll sync between article and preview don't work with large articles, a subtask of T432195: [EssentialWork] Support core Contributors, from Open to In Progress.

Tue, Aug 18, 11:04 PM · Essential-Work, Epic, Abstract Wikipedia team (27Q1 (Jul–Sep))

Jdforrester-WMF moved T417266: Specifying a Typed pair of Typed lists as a function’s argument type leads to [object Object] “Reference” when used from In Code review to Ready to deploy on the Abstract Wikipedia team (27Q1 (Jul–Sep)) board.

Tue, Aug 18, 11:03 PM · MW-1.47-notes (1.47.0-wmf.16; 2026-08-18), Abstract Wikipedia team (27Q1 (Jul–Sep)), Essential-Work, function-orchestrator

Jdforrester-WMF moved T433745: Unable to populate nested list on Wikifunctions when the UI component exists on page load ([Object object]-typed list) from In Code review to Ready to deploy on the Abstract Wikipedia team (27Q1 (Jul–Sep)) board.

Tue, Aug 18, 11:03 PM · Essential-Work, Abstract Wikipedia team (27Q1 (Jul–Sep)), WikiLambda Front-end

Jdforrester-WMF added a comment to T427454: Incorrect recursive evaluations with v2.

In T427454#12228995, @99of9 wrote:

How many hours ago did the deployment happen? Last night I was poking around at something else which might have affected this test, but now it's even more broken.

Tue, Aug 18, 10:34 PM · Abstract Wikipedia team (27Q1 (Jul–Sep)), Essential-Work, function-orchestrator, Abstract Wikipedia

Jdforrester-WMF moved T433444: Explicitly Model Closures and Correct Scope Attachment from In Engineering to Ready to deploy on the Abstract Wikipedia team (27Q1 (Jul–Sep)) board.

Tue, Aug 18, 10:18 PM · Patch-For-Review, OKR-Work, Abstract Wikipedia team (27Q1 (Jul–Sep)), function-orchestrator

Jdforrester-WMF created T435247: Type comparison does not check the keys inside a value, so four tests stay disabled.

Tue, Aug 18, 7:01 PM · Essential-Work, Abstract Wikipedia Fix-It tasks, Abstract Wikipedia team, function-orchestrator

Jdforrester-WMF added projects to T435246: Eight orchestrator tests never ran, because runTestOrchestration was called inside it(): Abstract Wikipedia Fix-It tasks, Essential-Work, function-orchestrator, Abstract Wikipedia team.

Tue, Aug 18, 6:59 PM · Patch-For-Review, Abstract Wikipedia team (27Q1 (Jul–Sep)), function-orchestrator, Essential-Work, Abstract Wikipedia Fix-It tasks

Jdforrester-WMF created T435246: Eight orchestrator tests never ran, because runTestOrchestration was called inside it().

Tue, Aug 18, 6:59 PM · Patch-For-Review, Abstract Wikipedia team (27Q1 (Jul–Sep)), function-orchestrator, Essential-Work, Abstract Wikipedia Fix-It tasks

Jdforrester-WMF edited projects for T429214: Abstract Wikipedia; vertical scroll sync between article and preview don't work with large articles, added: Abstract Wikipedia team (27Q1 (Jul–Sep)); removed Abstract Wikipedia team.

Tue, Aug 18, 6:56 PM · Patch-For-Review, Abstract Wikipedia team (27Q1 (Jul–Sep)), Abstract Wikipedia Fix-It tasks, WikiLambda Front-end, WikiLambda

Jdforrester-WMF closed T435161: TypeError: MediaWiki\HookContainer\HookRunner::onCategoryViewerGenerateLink(): Argument #4 ($html) must be of type string, null given, called in /srv/mediawiki/php-1.47.0-wmf.16/includes/Category/CategoryViewer.php on line 235 as Resolved.