ADR-0087 exemption (no-migration-prescription): Nothing authorable moves: `packages/spec` is untouched, `ViewSchema.object` keeps its key, its type and its legality, and no stored metadata representation changes shape, so `objectstack migrate meta` has nothing to rewrite and the ledger has no row to gain. What narrows is the set of VALUES the author-time rule accepts for a reference that must resolve to a declared object, and which declared object an author meant is a fact about their stack, never something a mechanical conversion can derive; the refusal carries its own correction. The other categories are closed on facts: `@objectstack/lint` publishes (not `unpublished`); no ADR-0087 id covers it (not `registered` / `already-registered`); and the change is rule behaviour, not a TypeScript declaration (not `runtime-interface-only` / `type-surface-only`).