Oh lord. We already have TOML, which is an improvement on limited JSON when a human-readable, easily-diffable, more flexible format is needed.

We don't even need HCL (offers little value), YAML (has too many features making it inherently less secure), XML (is a mess with too many features and too much verbosity), or INI (insufficient features) except for existing and historical reasons.

In cases where a single file is attempted to be managed by multiple, competing interests, it's probably better to split the file into multiple, modular/include files like *.d/* so there would be less chances for merge conflicts.

And then there's /{proc,sys}-like configuration with one "value" per file where the path forms the heirarchy.

Please. Just. Stop reinventing wheels that were already round enough.

Off topic: Hard part of the wheel was not the round shape, but the axle. (That part actually was improved great many times)