If the constraints are what makes it special, why is it just not very constrained? If you really wanted something totally focused on having multiple configs sha

If the constraints are what makes it special, why is it just not very constrained? If you really wanted something totally focused on having multiple configs sharing some base config template, then you wouldn’t be able to do anything other than overwrite specific keys entirely. (json deep merge) Jsonnet seems to let you concat strings, do some math using it’s standard lib (?!), reference other parts of the object etc. I also don’t think “object matches type description” is a niche that JS is lacking, there’s tons of libraries out there to assert that. You’re just trading footguns for different footguns IMO.