fix(templates): keep local service templates when the CDN bundle is unusable

A 200 response with an empty body or an error page replaced the local
templates and the shared cache, so the service list became empty.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

app/Jobs/PullTemplatesFromCDN.php

@@ -34,7 +34,11 @@ class PullTemplatesFromCDN implements ShouldBeEncrypted, ShouldQueue
                 ->get(config('constants.services.official'));
             if ($response->successful()) {
                 // Shared cache so Cloud HTTP nodes see the same bundle Horizon pulled.
-                store_service_templates_bundle($response->body());
+                if (! store_service_templates_bundle($response->body())) {
+                    Log::error('PullTemplatesFromCDN received an invalid bundle', [
+                        'body' => str($response->body())->limit(500)->toString(),
+                    ]);
+                }
             } else {
                 Log::error('PullTemplatesFromCDN failed', [
                     'status' => $response->status(),

bootstrap/helpers/shared.php

@@ -1484,6 +1484,12 @@ function service_templates_path(): string
  */
 function store_service_templates_bundle(string $json, ?string $fetchedAt = null): bool
 {
+    // A 200 response can still be an empty body or an error page; keep the current templates then.
+    $templates = json_decode($json, true);
+    if (! is_array($templates) || $templates === [] || array_is_list($templates)) {
+        return false;
+    }
+
     $fetchedAt ??= now()->toIso8601String();
     $path = service_templates_path();
 
@@ -1530,7 +1536,9 @@ function get_service_templates(bool $force = false): Collection
             if ($response->failed()) {
                 return collect([]);
             }
-            store_service_templates_bundle($response->body());
+            if (! store_service_templates_bundle($response->body())) {
+                return get_service_templates();
+            }
 
             return collect(json_decode($response->body()))->sortKeys();
         } catch (Throwable) {

tests/Feature/PullServiceTemplatesFromCdnTest.php

@@ -119,6 +119,33 @@ it('skips pulling templates in local development', function () {
     expect(Cache::get(service_templates_cache_key()))->toBeNull();
 });
 
+it('keeps the local templates when the CDN returns an unusable bundle', function (string $body) {
+    Http::fake([
+        config('constants.services.official') => Http::response($body, 200),
+    ]);
+
+    $path = service_templates_path();
+    $original = File::get($path);
+
+    try {
+        config(['app.env' => 'production']);
+
+        (new PullTemplatesFromCDN)->handle();
+
+        expect(md5(File::get($path)))->toBe(md5($original))
+            ->and(Cache::get(service_templates_cache_key()))->toBeNull()
+            ->and(get_service_templates())->not->toBeEmpty();
+    } finally {
+        File::put($path, $original);
+        Cache::forget(service_templates_cache_key());
+    }
+})->with([
+    'empty body' => '',
+    'html error page' => '<html>Bad gateway</html>',
+    'empty object' => '{}',
+    'json list' => '[1, 2]',
+]);
+
 it('logs when the CDN responds with a non-success status', function () {
     Http::fake([
         'cdn.coollabs.io/*' => Http::response('nope', 503),