Thanks for the links. So it seems processing-java will be removed for 4.4.5? Not sure then if the 4.4.4 version is WAI. Still curious to understand argument usage and how to properly pass it through. Via the Wiki - I seem to be using it as documented.
I did find this usage based on the PRs and tried that…
/Applications/Processing.app/Contents/MacOS/Processing cli --sketch=../../overlays/signal/mobile --run -- 123 abc
But this gives the same error - “got unexpected extra arguments…”