Change 343134 had a related patch set uploaded (by Jforrester):
[mediawiki/extensions/Cite] [WIP] Describe group changes for references and references lists

https://gerrit.wikimedia.org/r/343134

Change 343134 merged by jenkins-bot:
[mediawiki/extensions/Cite@master] Describe group changes for references and references lists

https://gerrit.wikimedia.org/r/343134

@Esanders Do you have any ideas about "columns setting changed"?

For {{reflist}] there is probably a column attribute, but we don't yet support templates but that's a separate issue. For <references> list we recently introduced the responsive attribute, so maybe we could add a message if that is changed, but given we don't have a UI for changing it in VE yet - I'd say we're done here. @Jdforrester-WMF?

Filed as T170194.

Change 413643 had a related patch set uploaded (by Jforrester; owner: Jforrester):
[mediawiki/extensions/Cite@master] VisualEditor: Describe reflist responsiveness changes too

https://gerrit.wikimedia.org/r/413643

Change 413643 merged by jenkins-bot:
[mediawiki/extensions/Cite@master] VisualEditor: Describe reflist responsiveness changes too

https://gerrit.wikimedia.org/r/413643

I see the custom messages for the changes related with References list but not for adding/removing/changing group/changing content for references. Not sure if I am missing something.

Hmm, the task is phrased a bit strangely. We don't actually have custom messages for adding/removing/changing content for references - we just show the change.

As for changing the group of a reference did you mean this or something else?

In T160589#4011944, @Tchanders wrote:

Hmm, the task is phrased a bit strangely. We don't actually have custom messages for adding/removing/changing content for references - we just show the change.

Got it!

As for changing the group of a reference did you mean this or something else?

I actually meant the following by changing the group of a reference, which seems to be working fine now :)