The check that each document type runs MessagePack's source-generated formatter saw the guard's
SlotFormatter and exited 1 (Soul s3 generator-consumer-check-red). The guard owns the one unwrap,
internal, visible to the consumer through InternalsVisibleTo; that also exposes the library's
internal GeneratedMessagePackResolver, so the consumer suppresses CS0436 (its own is the type used).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
61307d2060