Change #1087253 had a related patch set uploaded (by LorenMora; author: Kimberly Sarabia):

[mediawiki/extensions/WikimediaEvents@master] Introduce sessionLength mixin

https://gerrit.wikimedia.org/r/1087253

@KSarabia-WMF and @LMora-WMF will be pairing on this later today.

Browser Test Steps

FYI - eventLogging needs to be active to test the instrument in the browser. mw.eventLog dependency is required to initialize in the browser environment

Step 1 - Enable eventLogging in Your Environment

• Once EventLogging extension is loaded, cd to /core/e/EventLogging/devserver
• npm run eventgate-devserver
• Confirm that mw.eventLog is available globally by running:

console.log(mw.eventLog);

Step 2 - Confirm Functionality

Once mw.eventLog is properly initialized, try running the below script
Example test:

SessionLengthInstrumentMixin.start('testStream', 'testSchema');
setTimeout(() => {
    SessionLengthInstrumentMixin.stop('testStream');
}, 5000);

How It Verifies Functionality

Core Functionality

1. Session Start: Ensures SessionLengthInstrumentMixin.start() initializes the session and begins tracking.
2. Session Stop: Confirms SessionLengthInstrumentMixin.stop() removes the session and halts tracking.
3. Event Logging: Verifies sessionTick events are logged via mw.eventLog or its mock.

Tick Logic

• Confirms regulator triggers sessionTick at intervals (TICK_MS, 1 min default).
• Short test (5s) ensures session lifecycle (start → stop) works, even without reaching a tick.

I manually ran the SessionLengthInstrumentMixin and played around with it and confirmed that:

1. Session would start and stop
2. Session would tick at the specified interval
3. Session would become idle at the specified interval
4. Session would resume at the specified interval
5. Session would reset at the specified interval

Change #1087253 merged by jenkins-bot:

[mediawiki/extensions/WikimediaEvents@master] Experimental: Introduce sessionLength mixin

https://gerrit.wikimedia.org/r/1087253

The work here is done, but can't be signed off until https://phabricator.wikimedia.org/T381604 has passed QA.

QA to be done as part of T381604