How GRM solves the "who audits the auditors?" problem. Introduces the three‑layer audit stack, bounded recursion, and the portable audit standard. A closing reflection on audit, governance, and accountability.

How the Gradient Reality Model (GRM) becomes a portable standard. Introduces the seven‑element claim template, registry schema, badge rubric, D.4 lineage logs, and day‑one adoption checklist. Written for labs, regulators, and any team wanting to adopt GRM.