All communication is done over stdin/stdout. Currently there are no plans to support named pipes or networks but such a feature is trivial to add so it can be added when needed.
The protocol is line-oriented and all requests are asynchronous.
Requests are a pair of JSON objects encoded as follows:
{"token":"...", "method": "..."}{...}
The first object specifies what method to call and an optional token. If method is omitted,
the request is ignored. token is an optional value the client may use to identify responses.
The second object is defined by the method.
Responses are returned as a JSON object encoded as follows:
{"token": "...", "error": "...", "data": {...}}
token is the original token passed in the corresponding request (if any).
error desribes any possible error that occurred while handling the request.
data is defined by the method.
hello {"s": "..."} -> {"s": "..."}
hello takes an object with a key `s` and returns it
ping {"delay": 0} -> {"start": "...", "end": "..."}
ping takes an object with an optional `delay` in `milliseconds` and returns an object specifying
the `start` time when the request was received and `end` specifying when the delay ended.