Authority model¶

Policy, Composition, Modeling, Integration and Site have independent Git histories. Providers own meaning and export catalogs. Integration snapshots provider branches and publishes semantic artifacts. Site consumes a complete artifact and owns routes, navigation, styling and Pages deployment. Source only flows downstream.

The /use/ surface serves consumers. The /maintain/ surface serves providers and maintainers. Site's surfaces.json controls their presentation. Adding a provider means registering its branch in Integration; adding a document means editing its provider catalog. Neither operation requires a Site pin update.