CallRefused

The house understood the call and refuses it, because of what it names or where the run stands. A graph this app does not declare; a run that is not a run of the graph it was named under, or does not exist; a run that is not waiting for the decision it was sent, or is waiting and was asked to resume; an answer the gate never offered. None of them is a failure: nothing broke, nothing was written, and the message is the sentence the caller needs. {@see GraphRuns} throws it, for a host that drives the engine itself. The `graph:*` operations ANSWER it — `ok: false` and this sentence — because a surface treats a thrown refusal as a failure: over HTTP it is a 500 whose message stays in the log, and the caller reads `internal_error` (greenhouse decisions/0583). It stays a {@see GraphDeclarationException}, which is what these refusals were thrown as before they had a name of their own — so whoever caught that still catches this. The reverse is the point: a graph that does not COMPILE is a GraphDeclarationException that is NOT this, and nobody answers for it.

public function answer(): array

What an operation answers for it: a negative verdict and the sentence — nothing the call did not earn.