Perhaps more like EDN since it doesn't have a runtime. But yeah, it's s-exps with curly braces. Which in my opinion, look worse than round parentheses … but that's opinion
https://github.com/edn-format/edn https://learnxinyminutes.com/docs/edn/
https://github.com/edn-format/edn https://learnxinyminutes.com/docs/edn/
It hits a sweet spot for me between yaml and json. Yaml is easy to type/read, but I feel it's a bit too complex on the parsing side. And json is a pain to type, so I'm reluctant to use it for human entered configuration files.