diff --git a/CLAUDE.md b/CLAUDE.md
index c6c98ee..309f03a 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -75,6 +75,11 @@ Delivery plan: after the first release the app ships as ONE Docker container (An
 - Prefer the `@Service` decorator over `@Injectable({providedIn: 'root'})` for new singleton services (Angular v22+)
 - Use the `inject()` function instead of constructor injection
 
+## Routing
+
+- All routes are lazy loaded (`loadComponent` / `loadChildren`), including feature-internal ones
+- All routes render as a plain client-side SPA (`RenderMode.Client` in `app.routes.server.ts`). Do NOT use SSR or prerender by default; enable them only for specific routes the user explicitly asks for
+
 ## Project Structure
 
 - Organize code by feature, not by file type: `src/app/<feature>/` (e.g. `src/app/clients/`), not global `components/`, `services/`, `pipes/` folders
diff --git a/src/app/app.routes.server.ts b/src/app/app.routes.server.ts
index a911aa8..11ea7c5 100644
--- a/src/app/app.routes.server.ts
+++ b/src/app/app.routes.server.ts
@@ -3,6 +3,6 @@ import { RenderMode, ServerRoute } from '@angular/ssr';
 export const serverRoutes: ServerRoute[] = [
     {
         path: '**',
-        renderMode: RenderMode.Prerender,
+        renderMode: RenderMode.Client,
     },
 ];