In modern infrastructure management, the concept of a “source of truth” is often static—defined in version-controlled files that require manual workflows to apply changes. This presentation demonstrates a dynamic, mutable source of truth using InfraHub and Terraform, capable of automatically synchronizing changes to a live production network. We’ll showcase how configuration updates made through InfraHub are instantly reflected across network devices, ensuring that the source of truth is not only declarative but also authoritative and reactive.