This category may not be up to date; it may not show all extensions that use this hook. You can view this MediaWiki Code search query to see the most up-to-date version of all extensions that use this hook.
The SkinTemplateTabs category contains pages on extensions that use the SkinTemplateTabs hook.
If you're wondering why your extension broke with vector, please see Manual:Hooks/SkinTemplateNavigation. Vector uses a different hook.