The node client source code is live on Github, not sure where the "coming soon" is, maybe a cached version of the website?
https://github.com/fabgoodvibes/owlrun

The inference verification is a good question, for now this is beta and it's not happening yet, there are plans in the pipeline.

Good point on training/tuning that may be a natural path to evolve into ...

Thanks for your thoughtful considerations!