diff --git a/smoothschedule/schedule/serializers.py b/smoothschedule/schedule/serializers.py
index 3cbe53c..81d73a5 100644
--- a/smoothschedule/schedule/serializers.py
+++ b/smoothschedule/schedule/serializers.py
@@ -632,7 +632,7 @@ class PluginTemplateListSerializer(serializers.ModelSerializer):
             'install_count', 'rating_average', 'rating_count',
             'created_at', 'updated_at', 'published_at',
         ]
-        read_only_fields = '__all__'
+        read_only_fields = fields  # All fields are read-only for list view
 
 
 class PluginInstallationSerializer(serializers.ModelSerializer):
diff --git a/smoothschedule/schedule/views.py b/smoothschedule/schedule/views.py
index edc6ee4..4d21584 100644
--- a/smoothschedule/schedule/views.py
+++ b/smoothschedule/schedule/views.py
@@ -642,10 +642,11 @@ class PluginTemplateViewSet(viewsets.ModelViewSet):
         view_mode = self.request.query_params.get('view', 'marketplace')
 
         if view_mode == 'marketplace':
-            # Public marketplace - only approved public templates
+            # Public marketplace - platform official + approved public templates
+            from django.db.models import Q
             queryset = queryset.filter(
-                visibility=PluginTemplate.Visibility.PUBLIC,
-                is_approved=True
+                Q(visibility=PluginTemplate.Visibility.PLATFORM) |
+                Q(visibility=PluginTemplate.Visibility.PUBLIC, is_approved=True)
             )
         elif view_mode == 'my_plugins':
             # User's own templates