fix(core): preserve plugin create fields

packages/core/src/store/use-scene-commits.test.ts

@@ -391,7 +391,7 @@ describe('scene commit boundary', () => {
     }
   })
 
-  test('validates registered nodes without stripping forward-compatible fields', () => {
+  test('validates registered creates and updates without stripping forward-compatible fields', () => {
     const kind = 'test:operation-forward-compatible'
     if (!nodeRegistry.has(kind)) {
       nodeRegistry._register({
@@ -426,11 +426,21 @@ describe('scene commit boundary', () => {
       collections: {},
       dirtyNodes: new Set<AnyNodeId>(),
       materials: {},
-      nodes: { [id]: node },
-      rootNodeIds: [id],
+      nodes: {},
+      rootNodeIds: [],
     })
     clearSceneHistory()
 
+    expect(
+      applySceneOperationPatch({
+        materialChanges: [],
+        nodeCreates: [{ node, position: 0 }],
+        nodeDeletes: [],
+        nodeUpdates: [],
+      }),
+    ).toBe(true)
+    expect(useScene.getState().nodes[id]).toEqual(node)
+
     expect(
       applySceneOperationPatch({
         materialChanges: [],

packages/core/src/store/use-scene.ts

@@ -1525,7 +1525,7 @@ function sceneOperationPatchNextState(
       return null
     }
     createIds.add(parsed.id)
-    parsedCreates.push({ node: parsed, position: change.position })
+    parsedCreates.push({ node: change.node, position: change.position })
   }
   for (const change of changes.nodeDeletes) {
     const id = change.node.id