The repository test site (and dev site) should have all extensions enabled that are active on wikidata.org, as listed on https://www.wikidata.org/wiki/Special:Version.
Some of these need specific configuration, which may be tricky to set up. Here's some extensions I think are especially important to set up in a way that allows us to test t6heir interaction with Wikidata prior to deployment:
- AbuseFilter - see https://www.mediawiki.org/wiki/Extension:AbuseFilter
- Translate - see https://www.mediawiki.org/wiki/Help:Extension:Translate/Configuration
Version: unspecified
Severity: enhancement