Extension hook registry

The Hooks mechanism in MediaWiki is a powerful tool for extension authors to modify the behavior of MediaWiki while minimizing, if not eliminating, the need to hack the codebase. A logical extension of this idea is to place hooks in extensions themselves, in order to allow other developers to extend the extensions. This page provides a listing and documentation for hooks provided by extension authors. To document your hook:
 * 1) create a page named after the hook under your extension, e.g.  . Note: this naming convention allows defaults and category links in Template:Extension and Template:SeeCustomHook to work properly
 * 2) place the Template:Extension in your page and fill in the parameter values
 * 3) add a row for your hook in the table below