Module context 

Precomputed per-trace context shared by all checks.

Checks must be cheap and independent, so anything every check would otherwise recompute — message classification and the session lifecycle phase at each event — is derived once here, in a single deterministic pass over the events.

Structs

Exchange

One completed request/response exchange, in response order.

InitializeExchange

The observed initialize exchange, when present.

TraceContext

Everything checks need, precomputed once per trace.

Enums

Phase

The 2025-11-25 session lifecycle phase before a given event is processed.