The DynamicSidebar extension was developed in 2010 by Ryan Lane for use by WMF on Wikitech specifically (r62947). Basically, it allowed the MediaWiki:Sidebar message to be replaced based on the current viewer's user groups and/or the current page's categories (somewhat akin to core's MediaWiki:Editnotice-<ns> and MediaWiki:Group-<group>.css).
Per mw:Maintainers this extension is currently lacking a steward.
12 years later, this feature is no longer used and no longer needed on Wikitech. It remains only deployed there. Removing it from there would thus allow removal from production more generally and to discontinue its accompanied maintenance (at least as carried by people for the benefit of WMF/Wikitech).
Outstanding things that could be unassigned or declined:
- T261351: PHPUnit tests to cover all methods in DynamicSidebarHooks.php
- Open tasks
- Open changes on Gerrit
Examples of maintenance currently incurred:
- Merged changes on Gerrit
- Closed tasks
- T88955: DynamicSidebar should not use $wgUser inside $wgExtensionFunctions
- T145730: DynamicSidebar should not call Article::getContent()