ADR-0087 exemption (no-migration-prescription): No metadata moves: no spec key, authorable spelling, object definition or stored shape is added, removed, renamed or re-shaped, and no stored row is read, rewritten or converted, so there is nothing for `objectstack migrate meta` to rewrite. What changes is the verdict the authoring doors give an email template whose HTML body places a hole outside the supported placements. A stored template keeps rendering and is judged at its next publish, and the remedy is the author moving the hole, 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 The other categories are closed on facts: the package publishes (not unpublished); no ADR-0087 id covers this verdict (not already-registered); and the change is a lint verdict, not a declaration (not runtime-interface-only or type-surface-only).