This is a custom Robo Runner, that does not require an actual "RoboFile.php" just a class of your choosing.

See: consolidation/robo#242

If the above PR is merged, then this class will become redundant.

composer require brad-jones/robo-runner

// This class could be autoloaded for example.
class MyRoboClass
{
	// tasks...
}

// To run robo
(new Brads\Robo\Runner(MyRoboClass::class))->execute();