diff --git a/check-installation.php b/check-installation.php
index 70717f4..3e3306e 100644
--- a/check-installation.php
+++ b/check-installation.php
@@ -125,6 +125,24 @@ header('Content-Type: text/html; charset=utf-8');
     }
     ?>
     
+    <h2>5b. Dev Mode Filter Check (woonoow.php)</h2>
+    <?php
+    $main_file = $plugin_dir . '/woonoow.php';
+    if (file_exists($main_file)) {
+        $content = file_get_contents($main_file);
+        $has_dev_filter = strpos($content, "add_filter('woonoow/admin_is_dev', '__return_true')") !== false;
+        
+        if ($has_dev_filter) {
+            echo "<div><span class='fail'>✗ FAIL</span> - Hardcoded dev mode filter found in woonoow.php!</div>";
+            echo "<pre>  This forces dev mode ON for everyone.\n";
+            echo "  Remove this line from woonoow.php:\n";
+            echo "  add_filter('woonoow/admin_is_dev', '__return_true');</pre>";
+        } else {
+            echo "<div><span class='pass'>✓ PASS</span> - No hardcoded dev mode filters</div>";
+        }
+    }
+    ?>
+    
     <h2>6. Asset URLs</h2>
     <?php
     if (function_exists('plugins_url')) {
diff --git a/includes/Admin/Assets.php b/includes/Admin/Assets.php
index 0bf8cb2..d82a7a3 100644
--- a/includes/Admin/Assets.php
+++ b/includes/Admin/Assets.php
@@ -238,8 +238,18 @@ class Assets {
         /**
          * Filter: force dev/prod mode for WooNooW admin assets.
          * Return true to use Vite dev server, false to use built assets.
+         * 
+         * IMPORTANT: This filter should NOT be used in production!
+         * Only use it during development.
          */
-        return (bool) apply_filters('woonoow/admin_is_dev', $const_dev);
+        $filtered = apply_filters('woonoow/admin_is_dev', $const_dev);
+        
+        // Debug logging (only if WP_DEBUG is enabled)
+        if (defined('WP_DEBUG') && WP_DEBUG && $filtered !== $const_dev) {
+            error_log('[WooNooW Assets] Dev mode changed by filter: ' . ($filtered ? 'true' : 'false'));
+        }
+        
+        return (bool) $filtered;
     }
 
     /** Dev server URL (filterable) */
diff --git a/woonoow.php b/woonoow.php
index 30df686..1739a7e 100644
--- a/woonoow.php
+++ b/woonoow.php
@@ -43,5 +43,6 @@ register_activation_hook(__FILE__, function () {
     update_option('woocommerce_custom_orders_table_migration_enabled', 'yes');
 });
 
-add_filter('woonoow/admin_is_dev', '__return_true');
-add_filter('woonoow/admin_dev_server', fn() => 'https://woonoow.local:5173');
\ No newline at end of file
+// Dev mode filters removed - use wp-config.php if needed:
+// add_filter('woonoow/admin_is_dev', '__return_true');
+// add_filter('woonoow/admin_dev_server', fn() => 'https://woonoow.local:5173');
\ No newline at end of file