Change #1287492 had a related patch set uploaded (by VolkerE; author: VolkerE):

[mediawiki/extensions/WikimediaCustomizations@master] Donor Delight Badge: Add files and hook handler for donor badge experiment

https://gerrit.wikimedia.org/r/1287492

idk if it is documented anywhere? but to get this to work:

Set centralnotice cookie:

mw.cookie.set(
  'centralnotice_hide_fundraising',
  JSON.stringify( { created: Math.floor( Date.now() / 1000 ) } ),
  { path: '/', expires: 7 }
);

minerva-badge client preference:

mw.user.clientPrefs.set( 'minerva-badge', '1' );

also, per usual, setup experiment in my local test kitchen and set experiment override in the browser console:

mw.testKitchen.overrideExperimentGroup('donor-delight-badge', 'treatment-b-simple');

or:

mw.testKitchen.overrideExperimentGroup('donor-delight-badge', 'treatment-c-delightful');

Change #1287492 merged by jenkins-bot:

[mediawiki/extensions/WikimediaCustomizations@master] Donor Delight Badge: Add files and hook handler for donor badge experiment

https://gerrit.wikimedia.org/r/1287492

Change #1290931 had a related patch set uploaded (by Bernard Wang; author: Bernard Wang):

[mediawiki/extensions/WikimediaCustomizations@master] Donor badge style followup

https://gerrit.wikimedia.org/r/1290931

Change #1290931 merged by jenkins-bot:

[mediawiki/extensions/WikimediaCustomizations@master] Donor badge style followup

https://gerrit.wikimedia.org/r/1290931

Assuming this task is about the WikimediaCustomizations code project, hence adding that project tag so other people who don't know or don't care about team tags can also find this task when searching via projects or looking at workboards. Please set appropriate project tags when possible. Thanks!

[saved as draft comment] We will limit this experiment to JavaScript only users, given the experiment character.

What was before only mentioned in 1:1s before my vacation, the way of current Minerva header layout – compacting the on left/start position after logo search input, to a right/end position in header search icon-only button – does only work with one element.
This still ended up as an issue: T427407: Search icon appears on the left on mobile while logged out on certain wikis, with the fix we have limited the new Flexbox treatment only to experiment selectors.

Change #1296524 had a related patch set uploaded (by VolkerE; author: VolkerE):

[mediawiki/extensions/WikimediaCustomizations@master] docs, tokens: Bring documentation to consistent state, also use 1 token

https://gerrit.wikimedia.org/r/1296524

Change #1296524 merged by jenkins-bot:

[mediawiki/extensions/WikimediaCustomizations@master] docs, tokens: Bring documentation to consistent state, also use 1 token

https://gerrit.wikimedia.org/r/1296524

In T425459#11969081, @Jdlrobson-WMF wrote:

@bwang @Volker_E

In treatment-simple the popup appears on every page load. I think it should only show on the first display? Can you please fix? This seems like it would break the A/B test as people would be motivated to click hide.

$.cookie( 'centralnotice_hide_fundraising', '{"v":1,"created":1779379520,"reason":"donate"}', { path: '/' } );
mw.testKitchen.overrideExperimentGroup('donor-delight-badge', 'treatment-b-simple');

Moved to T425450

Thank you, @aude for the minerva-badge client preference and experiment overrides!

Checked in enwiki beta - added a comment with found issues - https://phabricator.wikimedia.org/T427313#12012838

All ACs seem to be in place.

treatment-b-simple	treatment-c-delightful
	Currently: no popover is displayed, so the badge cannot be dismissed for C treatment group (mentioned it also in https://phabricator.wikimedia.org/T427313#12012838. Click on the gifs: