I've reviewed the requirements and made some additions in the task description. The requirements should now cover everything needed to report on the metrics specified in T302358.

Summary of updates:

• I added a requirement to make sure that we can track the skin version being shown at the time of the click on the add topic button. Given that this new button is being implemented in both Vector 2010 and Vector 2022, this will ensure that we can decipher between the two buttons if needed (assuming that they are instrumented the same way). Note: DesktopWebUIActionsTracking includes a skin and skinVersion field which can be used to obtain this data.
• In addition to instrumentation in DesktopWebUIActionsTracking, we will be using EditAttemptStep to track edit workflow after a user clicks on the button. This will be used to calculate edit completion rate in T302358. This will require us making sure that the sampling rates between the two schemas are synchronized at the partner wikis.
• In EditAttemptStep, we should be able to track if the person is using the New Topic Tool or the legacy section=new workflow. This should be available in EditAttemptStep using the existing integration, init_type, and init_mechanism fields but adding so we have a complete requirement list.

All of these updates are reflected in the ==Requirements== section of the task description.

Change 895362 had a related patch set uploaded (by DLynch; author: DLynch):

[mediawiki/skins/Vector@master] Add logging to the add topic button when it's promoted to the header

https://gerrit.wikimedia.org/r/895362

As I understand the requirements, all that I need to do here is add the DesktopWebUIActionsTracking to the "add topic" button when it's promoted to the header. That patch logs it with the name "addsection-header". (As opposed to "ca-addsection" for the unpromoted version of the button, and "addsection-sticky-header" for the version in the sticky header.)

Change 895362 merged by jenkins-bot:

[mediawiki/skins/Vector@master] Add logging to the add topic button when it's promoted to the header

https://gerrit.wikimedia.org/r/895362

I checked events recorded in DesktopWebUIActionsTracking since this patch was deployed and confirmed events to the revised topic button (event.name = addsection-header) currently appear to be logging as expected.

Summary of click events to the revised add topic button promoted in the header (17 March 2023 through 20 March 2023):

• There have been 26 total click events since instrumentation was deployed. See table showing number of clicks to different topic buttons below:

• This includes 2 click events on hu.wiki and 24 click events on cs.wiki (the two partner wikis where this was enabled in T331313 )
• We start logging these events on March 17th
• All events occurred on Vector 2022 skin version as expected
• 18 click events by logged-in users and 8 click events for logged-out users.
• Clicks events occurred on Visual Editor (23 events) or Wikitext-2017 (9 events). No wikitext events.
• All currently logged as using the New Topic tool (integration = discussiontools)

cc @DLynch @ppelberg

DesktopWebUIActions, EditAttemptStep, and event metrics logged