Root nodes join through ModRoot.AddDeferred, so a reload that unloads the mod first never hands Godot a freed node

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

test_suites/collection_edit/src/CollectionEditTestInitializer.cs

@@ -19,7 +19,7 @@ namespace Mods.CollectionEditTest
 
             queued = true;
             GameLogger.Log("TEST", "CollectionEditTest: activating");
-            (Godot.Engine.GetMainLoop() as SceneTree)?.Root?.CallDeferred("add_child", new CollectionEditTestDriverNode());
+            ModRoot.AddDeferred(new CollectionEditTestDriverNode());
         }
     }
 }

test_suites/display_settings/src/DisplaySettingsTestInitializer.cs

@@ -27,7 +27,7 @@ namespace Mods.DisplaySettingsTest
 
             queued = true;
             GameLogger.Log("TEST", "DisplaySettingsTest: activating");
-            (Godot.Engine.GetMainLoop() as SceneTree)?.Root?.CallDeferred("add_child", new DisplaySettingsTestDriverNode(shots));
+            ModRoot.AddDeferred(new DisplaySettingsTestDriverNode(shots));
         }
     }
 }

test_suites/hot_reload/src/HotReloadTestInitializer.cs

@@ -19,7 +19,7 @@ namespace Mods.HotReloadTest
 
             queued = true;
             GameLogger.Log("TEST", "HotReloadTest: activating");
-            (Godot.Engine.GetMainLoop() as SceneTree)?.Root?.CallDeferred("add_child", new HotReloadTestDriverNode());
+            ModRoot.AddDeferred(new HotReloadTestDriverNode());
         }
     }
 }

test_suites/menu_flow/src/MenuFlowTestInitializer.cs

@@ -19,7 +19,7 @@ namespace Mods.MenuFlowTest
 
             queued = true;
             GameLogger.Log("TEST", "MenuFlowTest: activating");
-            (Godot.Engine.GetMainLoop() as SceneTree)?.Root?.CallDeferred("add_child", new MenuFlowTestDriverNode());
+            ModRoot.AddDeferred(new MenuFlowTestDriverNode());
         }
     }
 }

test_suites/new_game/src/NewGameTestInitializer.cs

@@ -19,7 +19,7 @@ namespace Mods.NewGameTest
 
             queued = true;
             GameLogger.Log("TEST", "NewGameTest: activating");
-            (Godot.Engine.GetMainLoop() as SceneTree)?.Root?.CallDeferred("add_child", new NewGameTestDriverNode());
+            ModRoot.AddDeferred(new NewGameTestDriverNode());
         }
     }
 }

test_suites/save_dormancy/src/SaveDormancyTestInitializer.cs

@@ -19,7 +19,7 @@ namespace Mods.SaveDormancyTest
 
             queued = true;
             GameLogger.Log("TEST", "SaveDormancyTest: activating");
-            (Godot.Engine.GetMainLoop() as SceneTree)?.Root?.CallDeferred("add_child", new SaveDormancyTestDriverNode());
+            ModRoot.AddDeferred(new SaveDormancyTestDriverNode());
         }
     }
 }