receptionist_candidate_not_found
The receptionist has no open (or, for a read, no recorded) release candidate. Stage one with POST /v1/agents/{id}/receptionist-release/candidate.
Problem shape
Every non-2xx response is an RFC 9457 application/problem+json body. The type URI below is stable and machine-matchable, so branch on the final path segment (the code) and treat the status as redundant confirmation. See the error-handling guide.
{
"type": "https://docs.vocapable.com/errors/receptionist_candidate_not_found",
"title": "…",
"status": 404,
"detail": "…",
"instance": "/v1/…"
}