ADR-0087 exemption (no-migration-prescription): Nothing authorable moves: no spec key, export, config field or stored metadata changes spelling or shape, `packages/spec` is untouched, and `objectstack migrate meta` has nothing to rewrite. What changes is the NAME of an operational state file the runtime writes under the ObjectStack home — a path on disk, not a metadata surface the ledger can project into `spec-changes.json` or the generated upgrade guide. The runtime reads the old name itself while no per-project file exists, so no consumer rewrites anything and there is no authored artifact a metadata upgrader could reach.