diff --git a/tests/routes/canvas-agent-operations.test.ts b/tests/routes/canvas-agent-operations.test.ts
index db00ff0e1..b5878891b 100644
--- a/tests/routes/canvas-agent-operations.test.ts
+++ b/tests/routes/canvas-agent-operations.test.ts
@@ -1004,6 +1004,138 @@ test.describe("canvas agent operation mutation contract", () => {
     );
   });
 
+  test("confirms move-node mutations and keeps retries from moving nodes again", () => {
+    const first = buildImageNode("image-move-a");
+    first.position = { x: 300, y: 100 };
+    const second = buildImageNode("image-move-b");
+    second.position = { x: 100, y: 100 };
+    const unrelated = buildImageNode("image-unrelated");
+    unrelated.position = { x: 900, y: 500 };
+    const canvasData = getCanvasData([first, second, unrelated]);
+    const plan: CanvasOperationPlan = {
+      version: 1,
+      operationId: "op-move-nodes",
+      operation: "move_nodes",
+      projectId,
+      targetNodeIds: ["image-move-a", "image-move-b"],
+      targetPosition: { x: 10, y: 20 },
+      layoutStrategy: "row",
+      spacing: 30,
+      metadata: {
+        messageId: "assistant-message-move",
+        chatId: "chat-1",
+      },
+    };
+
+    expect(() =>
+      applyCanvasOperationPlanToCanvasData({
+        canvasData,
+        plan,
+      })
+    ).toThrow(/需要用户确认/);
+
+    const moved = applyCanvasOperationPlanToCanvasData({
+      canvasData,
+      plan: {
+        ...plan,
+        confirmed: true,
+        metadata: {
+          ...plan.metadata,
+          confirmedByUser: true,
+        },
+      },
+    });
+    const movedNodes = getResultNodes(moved.canvasData);
+    const movedFirst = movedNodes.find((node) => node.id === "image-move-a");
+    const movedSecond = movedNodes.find((node) => node.id === "image-move-b");
+    const movedUnrelated = movedNodes.find((node) => node.id === "image-unrelated");
+
+    expect(moved.createdNodeIds).toEqual([]);
+    expect(moved.updatedNodeIds).toEqual(["image-move-b", "image-move-a"]);
+    expect(movedSecond).toMatchObject({
+      position: { x: 10, y: 20 },
+      data: {
+        metadata: {
+          movedByAgent: true,
+          canvasAgentOperationId: "op-move-nodes",
+          canvasAgentOperation: "move_nodes",
+          canvasAgentLayoutStrategy: "row",
+          previousPosition: { x: 100, y: 100 },
+        },
+      },
+    });
+    expect(movedFirst).toMatchObject({
+      position: { x: 360, y: 20 },
+      data: {
+        metadata: {
+          movedByAgent: true,
+          previousPosition: { x: 300, y: 100 },
+        },
+      },
+    });
+    expect(movedUnrelated?.position).toEqual({ x: 900, y: 500 });
+    expect((moved.canvasData as { selectedNodeIds?: string[] }).selectedNodeIds).toEqual([
+      "image-move-b",
+      "image-move-a",
+    ]);
+
+    const retry = applyCanvasOperationPlanToCanvasData({
+      canvasData: moved.canvasData,
+      plan: {
+        ...plan,
+        confirmed: true,
+        metadata: {
+          ...plan.metadata,
+          confirmedByUser: true,
+        },
+      },
+    });
+    const retryNodes = getResultNodes(retry.canvasData);
+
+    expect(new Set(retry.updatedNodeIds)).toEqual(
+      new Set(["image-move-a", "image-move-b"])
+    );
+    expect(retryNodes.find((node) => node.id === "image-move-b")?.position).toEqual({
+      x: 10,
+      y: 20,
+    });
+    expect(retryNodes.find((node) => node.id === "image-move-a")?.position).toEqual({
+      x: 360,
+      y: 20,
+    });
+  });
+
+  test("rejects confirmed stale move-node mutations", () => {
+    const target = buildImageNode("image-stale-move");
+
+    let caughtError: unknown;
+    try {
+      applyCanvasOperationPlanToCanvasData({
+        canvasData: getCanvasData([target]),
+        baseCanvasWasStale: true,
+        plan: {
+          version: 1,
+          operationId: "op-stale-move-node",
+          operation: "move_nodes",
+          projectId,
+          targetNodeIds: ["image-stale-move"],
+          targetPosition: { x: 10, y: 20 },
+          confirmed: true,
+          metadata: {
+            confirmedByUser: true,
+          },
+        },
+      });
+    } catch (error) {
+      caughtError = error;
+    }
+
+    expect(caughtError).toBeInstanceOf(CanvasAgentMutationError);
+    expect((caughtError as CanvasAgentMutationError).code).toBe(
+      "STALE_CANVAS_REVISION"
+    );
+  });
+
   test("confirms delete-node mutations, removes connected edges, and keeps retries idempotent", () => {
     const source = buildImageNode("image-source");
     const target = buildImageNode("image-delete");