added additonal property key to rename on the sdk generator

src/Appwrite/SDK/Specification/Format/OpenAPI3.php

@@ -825,6 +825,13 @@ class OpenAPI3 extends Format
 
             if ($model->isAny()) {
                 $output['components']['schemas'][$model->getType()]['additionalProperties'] = true;
+
+                $additionalKey = \method_exists($model, 'getAdditionalPropertiesKey')
+                    ? $model->getAdditionalPropertiesKey()
+                    : null;
+                if ($additionalKey !== null) {
+                    $output['components']['schemas'][$model->getType()]['x-additional-properties-key'] = $additionalKey;
+                }
             }
 
             if (!empty($required)) {

src/Appwrite/SDK/Specification/Format/Swagger2.php

@@ -807,6 +807,13 @@ class Swagger2 extends Format
 
             if ($model->isAny()) {
                 $output['definitions'][$model->getType()]['additionalProperties'] = true;
+
+                $additionalKey = \method_exists($model, 'getAdditionalPropertiesKey')
+                    ? $model->getAdditionalPropertiesKey()
+                    : null;
+                if ($additionalKey !== null) {
+                    $output['definitions'][$model->getType()]['x-additional-properties-key'] = $additionalKey;
+                }
             }
 
             if (!empty($required)) {

src/Appwrite/Utopia/Response/Model/Any.php

@@ -12,6 +12,26 @@ class Any extends Model
      */
     protected bool $any = true;
 
+    /**
+     * JSON wire-format key under which extra/dynamic attributes are exposed in
+     * generated SDK models (e.g. Document<T>'s `data` slot). Default null means
+     * SDK templates fall back to their hardcoded "data" key. Set this on
+     * subclasses (via setAdditionalPropertiesKey) to use a custom key like
+     * "metadata" while still benefiting from the generic `Model<T>` mapping.
+     */
+    protected ?string $additionalPropertiesKey = null;
+
+    public function setAdditionalPropertiesKey(string $key): self
+    {
+        $this->additionalPropertiesKey = $key;
+        return $this;
+    }
+
+    public function getAdditionalPropertiesKey(): ?string
+    {
+        return $this->additionalPropertiesKey;
+    }
+
     /**
      * Get Name
      *

src/Appwrite/Utopia/Response/Model/Presence.php

@@ -19,6 +19,9 @@ class Presence extends Any
 
     public function __construct()
     {
+        // Expose user-defined extras under "metadata" instead of the SDK default "data"
+        $this->setAdditionalPropertiesKey('metadata');
+
         $this
             ->addRule('$id', [
                 'type' => self::TYPE_STRING,
@@ -83,15 +86,10 @@ class Presence extends Any
                 'required' => false,
                 'default' => null,
                 'example' => self::TYPE_DATETIME_EXAMPLE,
-            ])
-            // not adding hostname here in the response model
-            ->addRule('metadata', [
-                'type' => self::TYPE_STRING,
-                'description' => 'Presence metadata.',
-                'required' => false,
-                'default' => [],
-                'example' => ['device' => 'web'],
             ]);
+        // `hostname` is intentionally not exposed.
+        // User-defined extras flow through Any's generic mapping, surfaced under
+        // the "metadata" key declared via setAdditionalPropertiesKey() above.
     }
 
     public function filter(DatabaseDocument $document): DatabaseDocument