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app/Filament/Resources/PackageResource/Pages/EditPackage.php

@@ -17,4 +17,19 @@ class EditPackage extends EditRecord
             Actions\DeleteAction::make(),
         ];
     }
-}
+
+    protected function mutateFormDataBeforeFill(array $data): array
+    {
+        $data['features'] = PackageResource::featuresToRepeaterItems($data['features'] ?? null);
+
+        return $data;
+    }
+
+    protected function mutateFormDataBeforeSave(array $data): array
+    {
+        $data['features'] = PackageResource::featuresFromRepeaterItems($data['features'] ?? []);
+
+        return $data;
+    }
+
+}