ADR-0087 exemption (no-migration-prescription): Nothing authorable moves: no `packages/spec` key, no Zod schema, no object definition, no config field and no stored representation changes its name, its type or its optionality, so `objectstack migrate meta` has nothing to visit, `spec-changes.json` has nothing to project and the upgrade guide has no row to gain. What moves is the RESPONSE a published REST door gives for one input shape at request time, and this changeset ships no instructions for rewriting anything a consumer authored — there is no authored artifact to rewrite. The affected caller's remedy is not an edit but the truth: the hook crashed, and the 500 says so. The other four categories are closed on facts: `@objectstack/rest` publishes to npm (not `unpublished`); no ADR-0087 id is minted in this diff (not `registered`) and none pre-dates the base that would cover it (not `already-registered`); no named `path#Symbol` is a non-metadata runtime interface whose members moved — no exported declaration changes at all, `isSandboxCrash` being file-local and absent from the package entry (not `runtime-interface-only`), which is also why `type-surface-only` has no subject.