Hi - jc author here. Just a couple points:

The casting to int/float is not done unless the underlying values are predictably documented to be numbers. There are rare cases where auto int/float conversions are done, but:

1) This is always documented, and

2) You can turn this functionality off via the —raw flag

Also, predictable schemas are documented with each parser. (e.g `jc -h —-arp`)

> Big Four "UN*X command output -> data" converters

What do you mean?

I mean that there would be a big 4 such converters if people actually invested time into these "front ends" to CLIs.