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+---
+'astro': major
+---
+
+### [changed]: `routes` type inside the hook `astro:build:done`
+In Astro v4.x, the `routes` type was `RouteData`.
+
+Astro v5.0 the `routes` type is `IntegrationRouteData`, which contains a subset of the `RouteData` type. The fields `isIndex` and `fallbackRoutes` were removed.
+
+#### What should I do?
+Update your adapter to change the type of `routes` from `RouteData` to `IntegrationRouteData`.
+
+```diff
+-import type {RouteData} from 'astro';
++import type {IntegrationRouteData} from "astro"
+
+-function useRoute(route: RouteData) {
++function useRoute(route: IntegrationRouteData) {
+  
+}
+```