Almost half* of the commands map json (stdin) to json (stdout). Extract, modify and insert all take and spit out json. Originally (when it only supported single commands) this is how you had to do everything. But that much piping is a real drag. Anyway, show me a shell json util that is more composable or at least provide a suggestion to improving it :-)

Grep/filter/map are all stuff you do in the shell, after using Jshon to extract the data from the hard-to-parse-safely json.

*The remaining commands are concessions to make line-oriented shell processing easier.