This plugin modifies the update system for a popular content management platform, enabling administrators to receive and install updates for themes and plugins from custom external locations. It is designed for developers and site owners who distribute or use software hosted on private servers, GitHub, or other version control systems, rather than the default public directory.

• External Update Sources: The core function redirects the built-in update checker to communicate with your specified external server or repository, bypassing the standard public directory.
• GitHub Integration: Includes a ready-to-use handler for plugins and themes stored in public or private GitHub repositories, simplifying setup for code hosted there.
• Custom Handler Framework: Provides an abstract class structure, allowing developers to write new handlers for other version control systems or custom update servers by defining a few required methods.
• Selective Control: You can apply the external update logic to specific plugins or themes by checking their file paths within the provided filter hooks, leaving other items to update normally.
• Update Notifications: Integrates with the standard admin interface to show available update notices and enables one-click installation from your configured external source.