Enforce Single Source of Truth (SSOT): one fact = one home, and every other place that needs it references that home instead of copying it. References don't drift; copies do. This mutates artifacts, so it is deliberate and loss-averse.
starts as a read-only audit. It names the truth in scope, finds every copy, chooses the canonical home, and reports the exact consolidation plan. Only after the user approves that plan does it mutate artifacts.