Reason
This extension's MediaWiki.org page was marked as archived by @PlavorSeol earlier today. Accordng to the pre-archival page, the extension has not been updated since 2011 and explicitly supports MediaWiki 1.7, so it is drastically out of date. However, the infobox also claims that the latest extension version is 1.2.0, while WikiApiary claims that there are 1.2.1 and 1.2.2 installations in the wild. Thus a bit of further investigation should be conducted before deciding whether the archival should proceed further.

Update

The new maintainer has moved to Gitlab. Outside archiving on MediaWiki.org, we can proceed with the other things.

To-do list

• This task
  • Add maintainers of that extension 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). The listed maintainer, Robchurch, does not appear to have contributed to any WMF project since 2008, and his MW.org userpage states he is "not currently involved in developing the MediaWiki software or extensions". (If anyone wants to try reaching out to him regardless, be my guest.)
  • Add Phabricator project MediaWiki-extensions-Preloader as a tag for this task.
• On-wiki documentation - These have been updated to point to the new repo.
  • Archive documentation on mediawiki.org (https://www.mediawiki.org/wiki/Extension:Preloader): replace page contents with {{TNT|Archived extension|last revision id before archiving|reason=archive reasons, per [[phab:T205952]]}}; include a link to this task in the reason parameter.
  • Archive Wikidata item associated with documentation page (https://www.wikidata.org/wiki/Q21678092) (remove nearly all statements, except instance of (P31) = MediaWiki extension (Q6805426), which should add a qualifier end time (P582) = the YYYY-MM-DD date that you decided to archive extension, generally per edit history, change English (and other languages if possible) description to "archived MediaWiki extension" (and its translation)).
• Phabricator
  • Archive Phabricator project MediaWiki-extensions-Preloader for the extension.
  • Mark all Phabricator tasks for the extension either Declined or Invalid.
  • Edit Phabricator project MediaWiki-extensions-Preloader description for the extension with a link to this ticket.
    • Add a link to the gitlab repository, per the maintainers request.