ADR-0087 exemption (no-migration-prescription): A refusal at `os build` and at the object save door of an expression that names an undeclared field in a non-dot member spelling: no authorable key, spelling, export or stored shape moves, and no stored row is read, rewritten or converted. A stored object whose expression is refused keeps loading until it is next saved, and the repair is the author's own (declare the field or fix the typo), which no ledger entry can derive. The other categories are closed on facts: the package publishes (not unpublished); no ADR-0087 id covers this verdict and this diff adds none (not registered / already-registered); and no exported TypeScript declaration changes (not runtime-interface-only / type-surface-only).