Yeah, I guess this doesn't use JavaScript expressions so it wouldn't have the weird stringiness and truthiness rules JS has, which is what I was worried about. Still, there are a lot of other issues with BCL.. I think I would rather see a piccolo style solution done with Skylark instead of BCL+json.

From reading the website I see it actually was inspired by gcl/bcl for kubecfg, so hopefully they used some lessons learned!