You want to override the
tell command, that has also the
msg aliases by default.
The class that will override these commands is MyTellCommand (extends PluginCommand).
To do this, you've to set the original command in a state that allows it to be overriden. Also, aliases will be registered directly, but since all the work was done for the first registration, it's pretty simple.
//We are in the context of a plugin $commandMap = $this->getServer()->getCommandMap(); $commandToOverride = $commandMap->getCommand("tell"); $commandToOverride->setLabel("tell_disabled"); //This prepares the command for the next step, setting up the Command->nextLabel $commandToOverride->unregister($commandMap); //This changes the current label //Now, we can register our command. $command = new MyTellCommand($this); $commandMap->register("myfallbackprefix", $command); //And the aliases $commandMap->register("myfallbackprefix", $command, "w"); $commandMap->register("myfallbackprefix", $command, "msg");