Reason
This extension has no active maintainer. The extension is largely maintained by the community doing bulk changes to allow core development to continue for reasons such as the SIP. The maintainer (Lbenedix) has not pushed any code to the repository since the import was merged 12 years ago in 2014, and only has one Gerrit revision since, in 2016.

There are version compatibility shims for 1.34+, and the API module still uses methods that were removed from core in 1.32. While parts of this codebase have been updated as described above, the frontend functionality seems to be partially broken or incomplete, and the API currently fatals in numerous circumstances.

Given the state of the state of this extension, and the duration elapsed, I believe the best course of action is to archive this extension.

To-do list

• This task
  • Add maintainers of that extension/skin as subscribers to this task (if they have no apparent Phabricator account, notify them on-wiki or via email if possible and note it here).
  • Add Phabricator project <#mediawiki-extensions-UIFeedback> as a tag for this task, and remove MediaWiki-extensions-Other/Other-skins as appropriate.
• On-wiki documentation
  • Archive documentation on mediawiki.org (provide URL): replace page contents with {{Archived extension|last revision id before archiving|task=T######}} (for extensions)/{{Archived skin|last revision|task=T######}} (for skins); replace T###### with this task's number.
  • If documentation page was translatable, remove <translate>, visit Special:PageTranslation, and click "remove from translation" (if you don't have the translation administrator right, ask a user who does).
  • Update Wikidata item (provide URL) associated with documentation page
    • add statement Abandonware (Q281039) to instance of (P31) together with qualifier start time (P580) = the YYYY-MM-DD date that you decided to archive extension/skin (generally per edit history)
    • add qualifier end time (P582) = the YYYY-MM-DD (same date as above) to instance of (P31) = MediaWiki extension (Q6805426)/MediaWiki skin (Q21996535)
• Phabricator
  • Mark all Phabricator tasks for the extension/skin either Declined or Invalid. Add a comment pointing to this task when doing so for reference.
  • Archive Phabricator project <#mediawiki-extensions-UIFeedback> for the extension/skin.
  • Edit Phabricator project <#mediawiki-extensions-UIFeedback> description for the extension/skin with a link to this ticket.
• Translatewiki.net/translations
  • If the extension is deployed on Wikimedia sites, but it is known that it's not going to receive significant feature updates or deployed to new wikis, make sure that its project ids (usually "ext-extensionname") appear in the groups/MediaWiki/WikimediaLegacyAgg.yaml file in the translatewiki Gerrit repository and not in WikimediaMainAgg.yaml, WikimediaAdvancedAgg.yaml, etc. (If it also has an api group, it should remain in WikimediaTechnicalAgg.yaml).
  • If the extension is no longer deployed on Wikimedia sites, remove it from all Wikimedia*Agg.yaml. (If it was ever deployed, by this time, it's most likely in WikimediaLegacyAgg.yaml or WikimediaTechnicalAgg.yaml.)
  • If the extension is going to be completely archived and no longer developed, remove it completely from translatewiki.net by making sure that its project IDs don't appear in any of the following files:
    • groups/MediaWiki/ExtensionsAgg.yaml
    • groups/MediaWiki/SkinsAgg.yaml
    • groups/MediaWiki/mediawiki-extensions.txt
    • groups/MediaWiki/mediawiki-skins.txt
    • repoconfig.yaml
    • mw-config/validation-exclusion-list.php
• Configuration/tests/integrations/etc.
  • Remove tests in integration/config (zuul/layout.yaml).
  • Remove manifest/other references from mediawiki/vagrant if they exist.
  • Remove from https://doc.wikimedia.org/cover-extensions/ if present (requires Continuous-Integration-Infrastructure shell user to delete directly from the server).
• Repositories
  • Remove from mediawiki/extensions / mediawiki/skins (along with in .gitmodules).
  • Mark the repository read-only in Gerrit (also edit description to prepend "[ARCHIVED]" and a reference to this task, remove all access lists and reparent on All-Archived-Projects): (provide Gerrit Repository URL).
  • Deactivate the Diffusion repository for the extension/skin: (provide the Diffusion repository callsign or URL).
  • Delete the GitHub mirror: (provide GitHub repository URL).