Anything in the master branch (release branch) should be pretty rock solid, but if you happen to notice anything that does crash it (like a bug on my end) please do report it.
<?php
$this->registerSayCommand('test', 'cmdTest', 'Displays your user info.');
$this->registerSayCommand('buy', 'cmdBuy', 'Purchase a car.');
$this->registerSayCommand('sell', 'cmdSell', 'Purchase a car.');
$this->registerSayCommand('tow', 'cmdTow', 'Sent to garage for £600');
$this->registerSayCommand('cash', 'cmdCash', 'Current bank balance.');
$this->registerSayCommand('licence', 'cmdLicence', 'Current Licence.');
$this->registerSayCommand('showoff', 'cmdShowoff', 'Shows off your stats.');
?>