I accept pull requests on GitHub I am a newbie on this, and I need to help me make this plugin work Read the "Readme.md" ... https://github.com/TonyDroidd/JoinEffect
Two things I can see straight from the code is that 1. You're not implementing the Listener interface therefore your event listener is not getting registered (extends PluginBase implements Listener), and 2. Your PHP file name should be Main.php, not main.php. I believe SPL autoloaders (what matches the namespace to the filename) are case sensitive.