You could... but I view JSON as a simple format that you could write a recursive parser for in a few hundred lines yourself. Bringing in compile-time code gene

You could... but I view JSON as a simple format that you could write a recursive parser for in a few hundred lines yourself. Bringing in compile-time code generation just for defining static JSONs (which is not that common outside of tests, as most JSONs are serialized and deserialized at runtime) sounds like a hard sell.