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+# Fallback Screens Backend
+
+Fallback Screens is currently a frontend-only core module.
+
+There is no backend source folder for this module.
+
+## Backend Relationship
+
+Backend modules may return HTTP status codes or API error payloads that eventually lead the admin frontend to show a fallback screen, but the fallback UI is owned by:
+
+```txt
+apps/admin/src/core/FallbackScreens/
+```
+
+Examples:
+
+| Status | Frontend fallback      | Notes                                         |
+| ------ | ---------------------- | --------------------------------------------- |
+| `403`  | `/error/403` or inline | Used for permission denied states.            |
+| `404`  | `/error/404`           | Used for unknown frontend routes.             |
+| `500`  | `/error/500`           | Used for generic server failure presentation. |
+
+## When Backend Changes Are Needed
+
+Backend changes are only needed when:
+
+- A backend endpoint should return a different status code.
+- A redirect or auth flow should navigate the frontend to a fallback route.
+- A feature needs a new machine-readable error contract that the frontend can map to a fallback screen.