ADR-0087 exemption (no-migration-prescription): An accept-set narrowing performed at the driver constructor: no key, spec symbol, Zod schema, object definition or stored representation is added, removed or renamed — `TursoDriverConfig.timeout` and `url` keep their names and types, and `TursoConfigSchema` is untouched. What moves is which CONFIGURATIONS `new TursoDriver()` accepts, so `objectstack migrate meta` has nothing to visit and there is no tombstone to mint. The refusal itself names the key, the scheme and both ways out, and which of the two an author wants (drop the window, or move the url to HTTPS) is authoring intent no ledger line can decide.