That's fantastic. We use Kotlin to build Taxi (taxilang.org) and orbitalhq.com. this would be an awesome addition to our docs.
However, do I understand it correctly that this allows me to output verified, working code in my test suite, but its not a tool that I can embed in my docs to create runnable code samples? (which is what the OP is showing).
super valuable either way, just trying to validate understanding.