$ mix ichor.conformance interpreted|compiled REQUEST ANSWER
This implementation's adapter for the Ichor Conformance
Suite: reads the JSON request at REQUEST, answers every case through
the named backend (Ichor.Conformance), and writes the JSON answer to
ANSWER.
Exits non-zero only when the adapter itself cannot work -- no request file, a request that is not JSON, a backend it does not have -- never because a case failed: a failed case is an answer, and the suite judges it.