Shit, it works.
No big deal, externally; you can write `$response.status`. But I think the QOL is a lot nicer here.
It's making me think I need to implement CLP/FD so you can write `$response.status in 200..299`. But that's probably a little more tricky than I'm imagining. I haven't even gotten negation (`!=`) working yet.
Next is default parameters.