That is something I have wanted for a long time too. I came from the XML world and am very familiar with XPath. It seems like you are trying to create an XPath type parser for JSON, but also including some more complex features than XPath might include (been a while since I touched it, so I'd have to refresh my memory).

Note that in your README, the links to the github repos for json-path and json-pointer 404.

See also, this: http://goessner.net/articles/JsonPath/