Is there a complete list of the different parameters available to goal rules? I'm trying to define a goal that takes an additional command line argument.

I think you can add additional parameters by defining

...Option

class vars on a

GoalSubsystem

, e.g. https://github.com/pantsbuild/pants/blob/710c198c2fad01581582367f72b11f85efbe9d8c/src/python/pants/core/goals/test.py#L503 is what defines the

pants test --debug

option.