ADR-0087 exemption (no-migration-prescription): Nothing here is reachable by `objectstack migrate meta`: no spec property, metadata key, accepted value or exported symbol is retired, `packages/spec` is not touched at all, and no stored metadata changes shape. The affected party is a TypeScript consumer and the delivery channel is the compiler at their own call site; the remedy is a null check on `actor`, which is application code rather than a metadata migration. `type-surface-only` is deliberately NOT claimed: its predicate 4 admits a narrowing that starts from `any`, `unknown` or no annotation, and while the scoped exit is exactly that case, the unscoped exit starts from a CONCRETE inline object type whose members change — the case that category's header names as outside its class.