Variable LLM_FAILURE_CODEConst

The provider-neutral routing codes AMC ships.

Spelled exactly as dsh spells them, on purpose: these strings are the shared classification vocabulary an adapter ported from dsh already produces, and a silent respelling would make a ported classifier route into nothing. They are deliberately NOT AMC_-prefixed — the prefix in this repository marks AMC's own contract violations (see LlmStreamProtocolCode), and a provider's rate limit is not an AMC contract violation.

code on LlmFailure stays a plain string rather than this union, because an unclassifiable HTTP status becomes HTTP_<status> and the set is therefore open by construction.