Stryker found the primitive, enum and object tests in Classify redundant with the value-type and unkeyed
branches, so they are gone. The new tests kill the survivors that were behaviour: a nullable keyed struct
walked as its struct, an unannotated struct treated as a value, [MessagePackObject] reaching a subclass,
and a claim on a type StandardResolverAllowPrivate cannot format.
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
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