What is a practical, governance-first Change Centre workflow for a hub-and-spoke Digital Twin, and which three artifacts should always be versioned and auditable?

The Change Centre is the governance surface that coordinates every update to hub facts, locale mappings and proofs. It should enforce that updates are linked to a hub_fact_id, run automated drift checks against language-aware mappings, and require explicit approvals before publishing. Each change is recorded in a Change Log with who, when and why, and a provenance panel shows locale contributions without exposing private workflows. A simple, auditable pipeline keeps the hub as the single source of truth while spoke surfaces reflect local decisions. Three artifacts to version and audit are: 1) hub facts—the canonical, centrally managed facts in the Public Business Brain; 2) locale mappings and proofs—the language-aware representations and their attached proofs; 3) the Change Log—the history of all changes, including locale updates, proof additions, and rollbacks. Versioning these artifacts enables safe rollbacks, clear provenance, and auditable AI-facing outputs that stay stable across locales.