The JSON file format famously does not allow comments, which makes it really awkward for this use case -- these sort of configuration files should be well-commented so that you remember six months from now what you need each file for, and why you need to run each command in your cider config. Hjson is a project that defines a new standard based on JSON, but allows for comments and makes the file format much more human-friendly. YAML is also a great solution.
The JSON file format famously does not allow comments, which makes it really awkward for this use case -- these sort of configuration files should be well-commented so that you remember six months from now what you need each file for, and why you need to run each command in your cider config. Hjson is a project that defines a new standard based on JSON, but allows for comments and makes the file format much more human-friendly. YAML is also a great solution.