Change #1046610 had a related patch set uploaded (by Urbanecm; author: Urbanecm):

[mediawiki/extensions/GrowthExperiments@master] Improve explanation for underlinkedWeight / minimumLinkScore

https://gerrit.wikimedia.org/r/1046610

Done. FWIW, I rephrased the beginning of both messages to not say "Communities can", as that is a phrasing that makes sense at eg. project pages (which address multiple communities at once), while the interface messages only address a single user, rather than multiple users (or communities) at the same time. This is how it looks with my patch applied:

Hope this is fine :). Moving to Code Review!

Change #1046610 merged by jenkins-bot:

[mediawiki/extensions/GrowthExperiments@master] Improve explanation for underlinkedWeight / minimumLinkScore

https://gerrit.wikimedia.org/r/1046610

In T367201#9897588, @Urbanecm_WMF wrote:

Done. FWIW, I rephrased the beginning of both messages to not say "Communities can", as that is a phrasing that makes sense at eg. project pages (which address multiple communities at once), while the interface messages only address a single user, rather than multiple users (or communities) at the same time. This is how it looks with my patch applied:

Hope this is fine :). Moving to Code Review!

Checked in beta and testwiki - looks fine.
@Urbanecm_WMF - two questions
(1) I thought that the validation messages fall back to a browser default warning(s); in fact, it's what I see now in beta and on production.

(2) on wikis where CommunityConfiguratino is enabled, very often I see Minimum required link score field blank, e.g. https://es.wikipedia.org/wiki/Especial:Configuración_comunitaria/GrowthSuggestedEdits. Should the default value for this field be displayed?

In T367201#9929157, @Etonkovidova wrote:

[...]
Checked in beta and testwiki - looks fine.

Yay! :)

@Urbanecm_WMF - two questions
(1) I thought that the validation messages fall back to a browser default warnings; in fact, it's what I see now in beta and on production.

Indeed. I was testing what happens when I manually change the HTML via Developer tools, and remove the min/max requirements on the frontend. The screenshot illustrates that even in that case, the validation works correctly and as expected. One would achieve the same result by testing via the CommunityConfiguration API instead.

(2) on wikis where CommunityConfiguratino is enabled, very often I see Minimum required link score field blank, e.g. https://es.wikipedia.org/wiki/Especial:Configuración_comunitaria/GrowthSuggestedEdits. Should the default value for this field be displayed?

This is definitely an error and not intended, the default value should show. I'm not sure why it doesn't. @KStoller-WMF mentioned the same issue few days ago, and she said she'll fill a task for it, but I can't see any in CommunityConfiguration-Adoption or MediaWiki-extensions-CommunityConfiguration. I filled this as T368606: Community configuration defaults are not merged with partially-specified objects.