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+{"action":"Query","device":"\\\\.\\DISPLAY3","hz":60,"width":2560,"bpp":32,"height":1440}

+task_result=0

+
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index 0000000..11d3dd2
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+NVIDIA GeForce GTX 965M, 582.78, 11 %

+cursor_probe_task_present=False

+

+[2026-11-03 14:29:49.548]: Info: Found H.264 encoder: h264_nvenc [nvenc]

+[2026-11-03 14:29:50.970]: Info: Creating encoder [h264_nvenc]

+[2026-11-03 14:34:22.851]: Info: Creating encoder [h264_nvenc]

+

+

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diff --git a/docs/evidence/cursor-poc-20261103/first-ibeam.json b/docs/evidence/cursor-poc-20261103/first-ibeam.json
new file mode 100644
index 0000000..dea5010
--- /dev/null
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diff --git a/docs/evidence/cursor-poc-20261103/first-lease.json b/docs/evidence/cursor-poc-20261103/first-lease.json
new file mode 100644
index 0000000..53a9d87
--- /dev/null
+++ b/docs/evidence/cursor-poc-20261103/first-lease.json
@@ -0,0 +1 @@
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\ No newline at end of file
diff --git a/docs/evidence/cursor-poc-20261103/first-results.json b/docs/evidence/cursor-poc-20261103/first-results.json
new file mode 100644
index 0000000..7765025
--- /dev/null
+++ b/docs/evidence/cursor-poc-20261103/first-results.json
@@ -0,0 +1,44 @@
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\ No newline at end of file
diff --git a/docs/evidence/cursor-poc-20261103/first-sizewe.json b/docs/evidence/cursor-poc-20261103/first-sizewe.json
new file mode 100644
index 0000000..a331d6d
--- /dev/null
+++ b/docs/evidence/cursor-poc-20261103/first-sizewe.json
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diff --git a/docs/evidence/cursor-poc-20261103/first-wait.json b/docs/evidence/cursor-poc-20261103/first-wait.json
new file mode 100644
index 0000000..90f78a2
--- /dev/null
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diff --git a/docs/evidence/cursor-poc-20261103/host-final-probe.txt b/docs/evidence/cursor-poc-20261103/host-final-probe.txt
new file mode 100644
index 0000000..83f58f0
--- /dev/null
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new file mode 100644
index 0000000..aa9b4fe
--- /dev/null
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new file mode 100644
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diff --git a/docs/evidence/cursor-poc-20261103/results.json b/docs/evidence/cursor-poc-20261103/results.json
new file mode 100644
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new file mode 100644
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new file mode 100644
index 0000000..327788e
--- /dev/null
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new file mode 100644
index 0000000..90f78a2
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diff --git a/docs/evidence/cursor-poc-20261103/windows-shapes.json b/docs/evidence/cursor-poc-20261103/windows-shapes.json
new file mode 100644
index 0000000..167fb5c
--- /dev/null
+++ b/docs/evidence/cursor-poc-20261103/windows-shapes.json
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\ No newline at end of file
diff --git a/docs/independent-cursor-design-20261103.md b/docs/independent-cursor-design-20261103.md
index 533c0f5..59f4b36 100644
--- a/docs/independent-cursor-design-20261103.md
+++ b/docs/independent-cursor-design-20261103.md
@@ -1,6 +1,6 @@
 # 独立光标二次开发设计与接入条件
 
-状态：源码核实完成，尚未实现 Sunshine/Moonlight 的独立光标通道，不应标记为已部署。当前保留单个 Windows 远程白色光标。
+状态：已通过受控的 Windows 光标导出 + 盒子 X11 本地指针原型验证；尚未实现 Sunshine/Moonlight 的自动独立光标通道，不应标记为生产功能已部署。测试已结束，当前恢复单个 Windows 远程白色光标。实测结果见 [独立光标可行性验证](independent-cursor-feasibility-20261103.md)。
 
 ## 已核实的实际路径
 
diff --git a/docs/independent-cursor-feasibility-20261103.md b/docs/independent-cursor-feasibility-20261103.md
new file mode 100644
index 0000000..fb41b36
--- /dev/null
+++ b/docs/independent-cursor-feasibility-20261103.md
@@ -0,0 +1,53 @@
+# 独立光标原型可行性实测（2026-11-03）
+
+## 结论和当前现场
+
+本地独立移动和 Windows 光标静态形状显示可行，值得继续开发 Sunshine + Moonlight 的正式同步协议。本轮完成了真实盒子和 VM100 的受控原型，不是仅做源码调研。但是自动形状同步、视频帧交接、断线回退尚未成为产品功能，不能默认启用，也不能称鼠标或窗口零延迟。
+
+测试已结束，Windows 临时任务 VDICursorPOC 已停止并删除。正常 Moonlight PID31694、2560×1440/45FPS、RKMPP/EGL 和原二进制 SHA256 `35de7b1a4ade583823b23b5f2e012307f6d0a3848c8eb97bd6d4de9660afa00f` 保留。VDD读回 DISPLAY3、2560×1440@60。最后确认本地指针为全透明1×1，屏幕里只有正常Windows远程白色光标；没有遗留测试辅助进程。GTX965M错误码0，编码占用11%，Sunshine该正常会话创建了h264_nvenc。没有重启机器、修改GPU固件/直通、Windows鼠标主题或正式客户端配置。
+
+## 原型做了什么
+
+Windows已登录用户会话运行临时测试窗口，用 GetCursorInfo 读取实际光标状态；GetIconInfo/DrawIconEx 导出默认箭头、文字、左右缩放、忙碌四种真实Windows形状，均为32×32，热点分别为(0,0)、(8,9)、(11,4)、(16,16)。导出仅复制资源并释放 GetIconInfo 返回的位图，没有替换系统主题。通过黑白背景双次绘制重建alpha，检测到依赖背景反色的像素就拒绝；这四个样本未检测到此类像素，不代表全部自定义光标都支持。
+
+管理工作站通过已有的认证PVE guest-agent通道读取导出文件，再经SSH传给盒子。没有新增网络监听端口，盒子没有直接使用PVE凭据。盒子辅助程序在现有Moonlight的X11窗口上创建本地指针，形状由测试脚本按已知测试区域顺序切换。**这是脚本控制的形状回放；没有将GetCursorInfo状态自动、实时同步到客户端。** Windows另存状态变化记录，供交叉核对。
+
+测试临时使用Sunshine的Ctrl+Alt+Shift+N隐藏视频光标，最后成对恢复。它只是原型手段，没有会话确认/租约，不能作为正式交接协议。正常Moonlight二进制未重编或替换；本轮验证的是底层X11本地指针可用性。正式功能应进入Moonlight的SDL主线程，并适配后续Weston/Wayland，不能把这份X11辅助程序当最终架构。
+
+## 实测结果
+
+| 验证项 | 结果与边界 |
+| --- | --- |
+| 四种形状及热点 | XFixes读取本地指针，尺寸/热点均与Windows导出一致；忙碌只验证一帧，未实现动画 |
+| 光标显隐 | 本地隐藏状态为全透明1×1；Windows记录也捕获到隐藏flags=0 |
+| 移动独立于视频 | 仅将当前Moonlight进程短暂停住，小于0.5秒，并保证SIGCONT恢复；本地指针仍从(320,500)移动到(500,650)，图像保持一致。这证明依赖关系解除，没有测得物理输入到屏幕毫秒数 |
+| 单光标受控稳态 | 原始XWD截图在禁用后不再包含远程指针，XFixes另行确认本地指针存在。XWD不包含本地硬件指针，不能将原始截图无指针误报为本地显示失败；未用合成图冒充屏幕截图 |
+| 点击正确性 | 最后完整一轮32次跨四区点击，Windows记录32/32区域及形状正确；绝对坐标归一化差值最大1像素，不宣称零偏差 |
+| 辅助状态超时 | 0.8秒测试租约过期，辅助程序退出并通过SDL恢复其拥有的隐藏指针；测试控制器随后恢复远程视频光标。没有证明真实控制断网时服务器能自动回退 |
+| 输入数据边界 | 10项测试通过，覆盖尺寸、热点、像素长度/范围、重复形状、XOR拒绝、格式、未知形状、过期/异常租约及文件大小 |
+
+最后完整轮次为 `cursor-poc-evidence-v3`。最初两轮已验证形状、移动和点击，但辅助程序退出后当前XFixes图像暂不可用，不能算完整通过；修正后才通过完整流程。没有把前两轮的失败隐藏成成功。
+
+## 暴露的两个实际问题
+
+1. **静止画面的旧光标会留在旧视频帧里。** 第一轮切换快捷键后立即截图，原位置的远程箭头仍在；之后画面更新才消失。最后一轮加入测试窗口时钟更新并等待新帧，禁用后的光标区域变为空背景，恢复后的区域重新出现Windows忙碌光标。正式实现必须用双方确认的视频帧边界切换，不能只延时几百毫秒后直接显示本地箭头。
+2. **X11指针资源有连接所有权。** 辅助程序在自己连接上复制一个隐藏指针，再关闭连接，并不足以可靠恢复SDL原先的资源。原型现在在XFixes临时隐藏保护下，使用Moonlight本地光标快捷键成对切换，让SDL重新设置它自己拥有的隐藏指针，再释放辅助资源。此清理依赖同一前台绝对鼠标会话，不能代替正式客户端内部的资源生命周期管理。代码失焦时明确报错，不声称任意退出路径都能可靠恢复。
+
+## 下一阶段执行顺序
+
+1. 固定现场Sunshine版本对应提交，在独立目录准备Windows可复现构建；当前未准备好该服务端C++构建环境。先验证未经修改的构建，再备份/部署测试实例，避免直接替换正常服务。
+2. 在现有已认证、加密的控制通道添加能力协商、形状/热点、显隐、状态序号与显示配置代数。Moonlight将有界状态投递SDL主线程，缓存形状，本地移动直接跟随物理输入；旧服务端保持远程模式。
+3. Sunshine提供有明确目标状态、帧边界确认和会话租约的光标交接，代替全局toggle；未捕获到可分离光标或形状不支持时回退。锁屏/UAC、远程主动warp、动画、缩放、多会话也须覆盖。
+4. 验收断网/重连/失焦、文字选择、拖窗、右键/双击及100%/125%/150%缩放，再用高速摄像分别测指针移动、点击反馈、窗口内容的P50/P95。通过后再开放可关闭的试用开关。
+
+独立光标可以绕开捕获、编码、网络、解码对“指针位置显示”的等待；窗口本身和点击后的页面仍需视频返回。它不会直接解决当前盒子2K60只实渲染约46FPS的问题，视频呈现优化仍按此前对照结论推进。
+
+## 文件与复核
+
+- `tools/cursor-poc-host.ps1`、`tools/run-cursor-poc-host.py`：临时Windows交互任务的start/status/export/stop。不自动触发、不修改Sunshine。
+- `tools/cursor-poc-x11.py`：有界资产/状态解析、静态alpha形状、本地租约、SDL所有权归还；必须显式选择同一个前台Moonlight绝对鼠标窗口。仅用于受控实验。
+- `tools/verify-cursor-poc-box.py`：受控演示、32点击、短暂停客户端及恢复；**仅可在上述Windows测试窗口位于前台时运行，不能向用户普通桌面盲目注入点击。** 输出目录拒绝覆盖，复跑须使用新目录名。
+- `tools/test-cursor-poc.py`：Linux边界测试，不更改指针。
+- `docs/evidence/cursor-poc-20261103/`：Windows资产和状态/点击记录、XFixes形状、原始截图转换、首轮失败证据、最终成功结果、超时日志、GPU/显示/本地指针收尾查询。压缩包保留原始XWD。
+
+实现依据：[Microsoft GetCursorInfo](https://learn.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-getcursorinfo)、[GetIconInfo](https://learn.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-geticoninfo)、[Desktop Duplication光标元数据](https://learn.microsoft.com/en-us/windows/win32/direct3ddxgi/desktop-dup-api)。正式协议及验收要求继续见 [双方二次开发设计](independent-cursor-design-20261103.md)。
diff --git a/tools/cursor-poc-host.ps1 b/tools/cursor-poc-host.ps1
new file mode 100644
index 0000000..535c717
--- /dev/null
+++ b/tools/cursor-poc-host.ps1
@@ -0,0 +1,122 @@
+# Scoped interactive cursor probe. No theme, driver, display or Sunshine changes.
+$ErrorActionPreference='Stop'
+$folder='C:\ProgramData\VDI\cursor-poc-20261103'
+Set-Content "$folder\pid.txt" $PID
+try {
+Add-Type -ReferencedAssemblies System.Windows.Forms,System.Drawing -TypeDefinition @'
+using System;
+using System.Collections.Generic;
+using System.Drawing;
+using System.IO;
+using System.Runtime.InteropServices;
+using System.Windows.Forms;
+public class VDICursorShape {
+    public string name; public int width,height,hotX,hotY,invertedPixels;
+    public bool monochrome; public uint[] argb;
+}
+public class VDICursorProbe : Form {
+    [StructLayout(LayoutKind.Sequential)] struct POINT { public int x,y; }
+    [StructLayout(LayoutKind.Sequential)] struct CI { public int size,flags; public IntPtr cursor; public POINT point; }
+    [StructLayout(LayoutKind.Sequential)] struct II { public bool icon; public int x,y; public IntPtr mask,color; }
+    [DllImport("user32.dll")] static extern bool GetCursorInfo(ref CI ci);
+    [DllImport("user32.dll")] static extern bool GetIconInfo(IntPtr h,out II info);
+    [DllImport("user32.dll")] static extern bool DrawIconEx(IntPtr dc,int x,int y,IntPtr icon,int w,int h,int step,IntPtr brush,int flags);
+    [DllImport("gdi32.dll")] static extern bool DeleteObject(IntPtr h);
+    [DllImport("user32.dll")] public static extern bool SetProcessDPIAware();
+    public static readonly string[] Names={"arrow","ibeam","sizewe","wait"};
+    static readonly Cursor[] Shapes={Cursors.Default,Cursors.IBeam,Cursors.SizeWE,Cursors.WaitCursor};
+    static Bitmap Draw(IntPtr handle,int w,int h,Color background) {
+        Bitmap result=new Bitmap(w,h,System.Drawing.Imaging.PixelFormat.Format32bppArgb);
+        using(Graphics g=Graphics.FromImage(result)) {
+            g.Clear(background); IntPtr dc=g.GetHdc();
+            try { if(!DrawIconEx(dc,0,0,handle,w,h,0,IntPtr.Zero,3)) throw new Exception("DrawIconEx failed"); }
+            finally { g.ReleaseHdc(dc); }
+        }
+        return result;
+    }
+    public static VDICursorShape Export(string name,IntPtr handle) {
+        II info; if(!GetIconInfo(handle,out info)) throw new Exception("GetIconInfo failed");
+        try {
+            int w,h;
+            using(Bitmap mask=Bitmap.FromHbitmap(info.mask)) { w=mask.Width; h=mask.Height/(info.color==IntPtr.Zero?2:1); }
+            if(w<1 || h<1 || w>128 || h>128) throw new Exception("Unsupported cursor dimensions");
+            VDICursorShape s=new VDICursorShape {name=name,width=w,height=h,hotX=info.x,hotY=info.y,monochrome=info.color==IntPtr.Zero,argb=new uint[w*h]};
+            using(Bitmap black=Draw(handle,w,h,Color.Black))
+            using(Bitmap white=Draw(handle,w,h,Color.White)) {
+                for(int y=0;y<h;y++) for(int x=0;x<w;x++) {
+                    Color b=black.GetPixel(x,y), z=white.GetPixel(x,y);
+                    int dr=z.R-b.R,dg=z.G-b.G,db=z.B-b.B;
+                    // XOR/inverted cursors need destination-dependent composition.
+                    // Preserve the unsupported count; never silently call them alpha cursors.
+                    if(dr<0 || dg<0 || db<0 || Math.Abs(dr-dg)>2 || Math.Abs(dr-db)>2) { ++s.invertedPixels; continue; }
+                    int a=255-dr;
+                    if(a==0) continue;
+                    uint r=(uint)Math.Min(255,(b.R*255+a/2)/a),g=(uint)Math.Min(255,(b.G*255+a/2)/a),bl=(uint)Math.Min(255,(b.B*255+a/2)/a);
+                    s.argb[y*w+x]=((uint)a<<24)|(r<<16)|(g<<8)|bl;
+                }
+            }
+            return s;
+        } finally { if(info.mask!=IntPtr.Zero) DeleteObject(info.mask); if(info.color!=IntPtr.Zero) DeleteObject(info.color); }
+    }
+    public static VDICursorShape[] ExportAll() {
+        List<VDICursorShape> result=new List<VDICursorShape>();
+        for(int i=0;i<Names.Length;i++) result.Add(Export(Names[i],Shapes[i].Handle));
+        return result.ToArray();
+    }
+    readonly Timer timer=new Timer(); readonly string folder; readonly DateTime started=DateTime.UtcNow;
+    bool hidden; string shape="arrow",lastObserved=""; int clicks;
+    public VDICursorProbe(string path) {
+        folder=path; Text="VDI Independent Cursor Probe"; FormBorderStyle=FormBorderStyle.None;
+        Bounds=Screen.PrimaryScreen.Bounds; TopMost=true; DoubleBuffered=true;
+        File.WriteAllText(Path.Combine(folder,"clicks.csv"),"utc,x,y,shape\n");
+        File.WriteAllText(Path.Combine(folder,"states.csv"),"utc,shape,flags,x,y\n");
+        timer.Interval=100;
+        timer.Tick+=delegate {
+            if((DateTime.UtcNow-started).TotalMinutes>8) { Close(); return; }
+            CI ci=new CI(); ci.size=Marshal.SizeOf(typeof(CI));
+            if(!GetCursorInfo(ref ci)) return;
+            string observed="unknown";
+            for(int i=0;i<Shapes.Length;i++) if(ci.cursor==Shapes[i].Handle) observed=Names[i];
+            string observedKey=observed+","+ci.flags;
+            if(observedKey!=lastObserved) {
+                File.AppendAllText(Path.Combine(folder,"states.csv"),DateTime.UtcNow.ToString("o")+","+observedKey+","+ci.point.x+","+ci.point.y+"\n");
+                lastObserved=observedKey;
+            }
+            string json="{\"version\":1,\"shape\":\""+observed+"\",\"visible\":"+(((ci.flags&1)!=0)?"true":"false")+",\"x\":"+ci.point.x+",\"y\":"+ci.point.y+",\"utc\":\""+DateTime.UtcNow.ToString("o")+"\"}";
+            string target=Path.Combine(folder,"state.json"),temp=target+".new";
+            File.WriteAllText(temp,json);
+            if(File.Exists(target)) File.Replace(temp,target,null); else File.Move(temp,target);
+            Invalidate(new Rectangle(0,0,Width,140));
+        };
+        timer.Start();
+    }
+    protected override void OnMouseMove(MouseEventArgs e) {
+        base.OnMouseMove(e);
+        bool nextHidden=e.Y>Height*3/4;
+        if(nextHidden!=hidden) { if(nextHidden) Cursor.Hide(); else Cursor.Show(); hidden=nextHidden; }
+        int index=Math.Min(3,e.X*4/Math.Max(1,Width)); shape=Names[index]; Cursor=Shapes[index];
+    }
+    protected override void OnMouseDown(MouseEventArgs e) {
+        base.OnMouseDown(e); ++clicks;
+        File.AppendAllText(Path.Combine(folder,"clicks.csv"),DateTime.UtcNow.ToString("o")+","+e.X+","+e.Y+","+shape+"\n"); Invalidate();
+    }
+    protected override void OnPaint(PaintEventArgs e) {
+        e.Graphics.Clear(Color.FromArgb(24,32,44));
+        using(Font f=new Font("Consolas",23)) for(int i=0;i<4;i++) {
+            e.Graphics.DrawRectangle(Pens.SlateGray,i*Width/4,150,Width/4-2,Height*3/4-150);
+            e.Graphics.DrawString(Names[i],f,Brushes.White,i*Width/4+40,200);
+        }
+        using(Font f=new Font("Consolas",24)) {
+            e.Graphics.DrawString("Independent cursor probe | clicks: "+clicks+" | "+DateTime.UtcNow.ToString("HH:mm:ss.fff"),f,Brushes.White,40,40);
+            e.Graphics.DrawString("BOTTOM AREA: cursor hidden",f,Brushes.Gold,40,Height*3/4+60);
+        }
+    }
+    protected override void OnFormClosed(FormClosedEventArgs e) {
+        timer.Stop(); timer.Dispose(); if(hidden) { Cursor.Show(); hidden=false; } base.OnFormClosed(e);
+    }
+}
+'@
+[VDICursorProbe]::SetProcessDPIAware() | Out-Null
+@{version=1; shapes=[VDICursorProbe]::ExportAll()} | ConvertTo-Json -Depth 6 -Compress | Set-Content -Encoding utf8 "$folder\shapes.json"
+[System.Windows.Forms.Application]::Run((New-Object VDICursorProbe($folder)))
+} catch { $_ | Out-String | Set-Content "$folder\error.txt"; throw }
diff --git a/tools/cursor-poc-x11.py b/tools/cursor-poc-x11.py
new file mode 100644
index 0000000..2e2a9d6
--- /dev/null
+++ b/tools/cursor-poc-x11.py
@@ -0,0 +1,223 @@
+#!/usr/bin/env python3
+"""Temporary X11 local-cursor proof, NOT a production Moonlight cursor protocol.
+
+Requires an already authenticated Moonlight session. Never changes Sunshine.
+The caller owns remote-video-cursor handoff and must restore it in finally.
+Only supports exported alpha cursors without destination-dependent XOR pixels.
+"""
+import argparse
+import ctypes as C
+import fcntl
+import json
+import math
+import os
+from pathlib import Path
+import signal
+import subprocess
+import time
+
+
+class XcursorImage(C.Structure):
+    _fields_ = [("version", C.c_uint32), ("size", C.c_uint32),
+                ("width", C.c_uint32), ("height", C.c_uint32),
+                ("xhot", C.c_uint32), ("yhot", C.c_uint32),
+                ("delay", C.c_uint32), ("pixels", C.POINTER(C.c_uint32))]
+
+
+class XfixesImage(C.Structure):
+    _fields_ = [("x", C.c_short), ("y", C.c_short),
+                ("width", C.c_ushort), ("height", C.c_ushort),
+                ("xhot", C.c_ushort), ("yhot", C.c_ushort),
+                ("serial", C.c_ulong), ("pixels", C.POINTER(C.c_ulong)),
+                ("atom", C.c_ulong), ("name", C.c_char_p)]
+
+
+def validate_assets(data):
+    if not isinstance(data, dict) or type(data.get("version")) is not int or data.get("version") != 1 or not isinstance(data.get("shapes"), list) or not 1 <= len(data["shapes"]) <= 32:
+        raise ValueError("Invalid asset version/count")
+    result = {}
+    for s in data["shapes"]:
+        if not isinstance(s, dict):
+            raise ValueError("Invalid shape")
+        name = s.get("name")
+        if not isinstance(name, str) or not name.isascii() or not name.isalnum() or len(name) > 32 or name in result:
+            raise ValueError("Invalid/duplicate shape name")
+        for key in ("width", "height", "hotX", "hotY", "invertedPixels"):
+            if type(s.get(key)) is not int:
+                raise ValueError("Noninteger cursor metadata")
+        w, h = s["width"], s["height"]
+        if not 1 <= w <= 128 or not 1 <= h <= 128 or not 0 <= s["hotX"] < w or not 0 <= s["hotY"] < h:
+            raise ValueError("Invalid size/hotspot")
+        if s["invertedPixels"] != 0:
+            raise ValueError("Destination-dependent XOR cursor requires fallback")
+        pixels = s.get("argb")
+        if not isinstance(pixels, list) or len(pixels) != w*h or any(type(p) is not int or not 0 <= p <= 0xffffffff for p in pixels):
+            raise ValueError("Invalid ARGB pixels")
+        result[name] = s
+    return result
+
+
+def validate_state(state, shapes):
+    if not isinstance(state, dict) or type(state.get("version")) is not int or state.get("version") != 1 or type(state.get("visible")) is not bool or not isinstance(state.get("shape"), str) or state.get("shape") not in shapes:
+        raise ValueError("Invalid state/unknown shape")
+    # A bounded wall-clock lease prevents stale local pointers after the bridge dies.
+    expires = state.get("expires")
+    if type(expires) not in (int, float) or not math.isfinite(expires) or not time.time() < expires <= time.time()+5:
+        raise ValueError("Expired/invalid state lease")
+    return state["shape"] if state["visible"] else "__hidden"
+
+
+def read_json(path, limit):
+    with open(path, "rb") as f:
+        raw = f.read(limit+1)
+    if len(raw) > limit:
+        raise ValueError("Oversize JSON")
+    return json.loads(raw)
+
+
+class LocalCursor:
+    def __init__(self, window):
+        self.x = C.CDLL("libX11.so.6")
+        self.c = C.CDLL("libXcursor.so.1")
+        self.f = C.CDLL("libXfixes.so.3")
+        self.x.XOpenDisplay.argtypes = [C.c_char_p]; self.x.XOpenDisplay.restype = C.c_void_p
+        self.x.XDefineCursor.argtypes = [C.c_void_p, C.c_ulong, C.c_ulong]
+        self.x.XSync.argtypes = [C.c_void_p, C.c_int]
+        self.x.XFree.argtypes = [C.c_void_p]
+        self.x.XFreeCursor.argtypes = [C.c_void_p, C.c_ulong]
+        self.x.XCloseDisplay.argtypes = [C.c_void_p]
+        self.f.XFixesGetCursorImage.argtypes = [C.c_void_p]; self.f.XFixesGetCursorImage.restype = C.POINTER(XfixesImage)
+        self.f.XFixesHideCursor.argtypes = [C.c_void_p, C.c_ulong]
+        self.f.XFixesShowCursor.argtypes = [C.c_void_p, C.c_ulong]
+        self.c.XcursorImageCreate.argtypes = [C.c_int, C.c_int]; self.c.XcursorImageCreate.restype = C.POINTER(XcursorImage)
+        self.c.XcursorImageDestroy.argtypes = [C.POINTER(XcursorImage)]
+        self.c.XcursorImageLoadCursor.argtypes = [C.c_void_p, C.POINTER(XcursorImage)]; self.c.XcursorImageLoadCursor.restype = C.c_ulong
+        self.d = self.x.XOpenDisplay(None)
+        if not self.d:
+            raise RuntimeError("Cannot open X display")
+        self.window = window
+        self.cursors = {}
+        self.original = self.create(self.snapshot(), premultiplied=True)
+
+    def snapshot(self):
+        image = self.f.XFixesGetCursorImage(self.d)
+        if not image:
+            raise RuntimeError("No XFixes cursor image")
+        try:
+            i = image.contents
+            if not 1 <= i.width <= 128 or not 1 <= i.height <= 128:
+                raise RuntimeError("Unsupported X cursor dimensions")
+            return dict(width=i.width, height=i.height, hotX=i.xhot, hotY=i.yhot,
+                        x=i.x, y=i.y, argb=[int(i.pixels[p]) & 0xffffffff for p in range(i.width*i.height)])
+        finally:
+            self.x.XFree(image)
+
+    def create(self, s, premultiplied=False):
+        image = self.c.XcursorImageCreate(s["width"], s["height"])
+        if not image:
+            raise RuntimeError("Xcursor allocation failed")
+        try:
+            image.contents.xhot, image.contents.yhot = s["hotX"], s["hotY"]
+            for j, p in enumerate(s["argb"]):
+                if premultiplied:
+                    image.contents.pixels[j] = p
+                    continue
+                # XRender/Xcursor uses premultiplied alpha; Windows export is straight ARGB.
+                a = p >> 24
+                r, g, b = ((p >> shift) & 255 for shift in (16, 8, 0))
+                image.contents.pixels[j] = (a << 24) | ((r*a+127)//255 << 16) | ((g*a+127)//255 << 8) | ((b*a+127)//255)
+            cursor = self.c.XcursorImageLoadCursor(self.d, image)
+            if not cursor:
+                raise RuntimeError("Xcursor creation failed")
+            return cursor
+        finally:
+            self.c.XcursorImageDestroy(image)
+
+    def apply(self, cursor):
+        self.x.XDefineCursor(self.d, self.window, cursor)
+        self.x.XSync(self.d, 0)
+
+    def close(self, sdl_pid=None):
+        self.apply(self.original)
+        try:
+            if sdl_pid is not None:
+                # X11 cursor resources owned by this connection disappear when
+                # it closes. Have SDL restore its own hidden cursor first. The
+                # temporary XFixes hide prevents the first toggle flashing the
+                # default local arrow. This POC requires the same focused stream.
+                active = subprocess.check_output(["xdotool", "getwindowfocus", "getwindowpid"],text=True).strip()
+                if active != str(sdl_pid):
+                    raise RuntimeError("Cannot return cursor ownership: stream lost focus; reconnect normal client")
+                self.f.XFixesHideCursor(self.d,self.window); self.x.XSync(self.d,0)
+                try:
+                    for unused in range(2):
+                        subprocess.run(["xdotool","key","ctrl+alt+shift+c"],check=True)
+                        time.sleep(.08)
+                finally:
+                    self.f.XFixesShowCursor(self.d,self.window); self.x.XSync(self.d,0)
+        finally:
+            for cursor in [self.original, *self.cursors.values()]:
+                self.x.XFreeCursor(self.d, cursor)
+            self.x.XCloseDisplay(self.d)
+
+
+def main():
+    parser = argparse.ArgumentParser(description=__doc__)
+    parser.add_argument("--window", type=int, required=True)
+    parser.add_argument("--pid", type=int, required=True)
+    parser.add_argument("--assets", type=Path, required=True)
+    parser.add_argument("--state", type=Path, required=True)
+    parser.add_argument("--seconds", type=int, default=120)
+    parser.add_argument("--snapshot", type=Path)
+    args = parser.parse_args()
+    if not 1 <= args.seconds <= 180 or args.window <= 0 or args.pid <= 1:
+        parser.error("Invalid window/pid/duration")
+    command = Path(f"/proc/{args.pid}/cmdline").read_bytes().replace(b"\0", b" ")
+    if b"/moonlight " not in command or b" stream " not in command or b" --absolute-mouse " not in command:
+        parser.error("Target must be the absolute-mode Moonlight stream")
+    actual_pid = subprocess.check_output(["xdotool", "getwindowpid", str(args.window)], text=True).strip()
+    focused_window = subprocess.check_output(["xdotool", "getwindowfocus"], text=True).strip()
+    if actual_pid != str(args.pid) or focused_window != str(args.window):
+        parser.error("Target must be the same focused Moonlight window")
+    # Keep the experiment exclusive, with owner-only local files.
+    lock = open(args.state.with_suffix(".lock"), "w")
+    os.chmod(lock.name, 0o600)
+    fcntl.flock(lock, fcntl.LOCK_EX | fcntl.LOCK_NB)
+    shapes = validate_assets(read_json(args.assets, 4*1024*1024))
+    cursor = LocalCursor(args.window)
+    if any(cursor.snapshot()["argb"]):
+        cursor.x.XFreeCursor(cursor.d, cursor.original)
+        cursor.x.XCloseDisplay(cursor.d)
+        parser.error("POC requires the original local cursor to be hidden")
+    stop = False
+    def stopped(*unused):
+        nonlocal stop
+        stop = True
+    signal.signal(signal.SIGTERM, stopped); signal.signal(signal.SIGINT, stopped)
+    try:
+        cursor.cursors = {name: cursor.create(s) for name, s in shapes.items()}
+        cursor.cursors["__hidden"] = cursor.create(dict(width=1, height=1, hotX=0, hotY=0, argb=[0]))
+        current = None
+        end = time.monotonic()+args.seconds
+        while not stop and time.monotonic() < end:
+            if not Path(f"/proc/{args.pid}").exists():
+                break
+            try:
+                desired = validate_state(read_json(args.state, 1024), shapes)
+            except (ValueError, OSError) as e:
+                print(json.dumps(dict(event="lease-ended", reason=str(e))), flush=True)
+                break
+            if desired != current:
+                cursor.apply(cursor.cursors[desired]); current = desired
+                s = cursor.snapshot()
+                if args.snapshot:
+                    args.snapshot.write_text(json.dumps(s))
+                print(json.dumps(dict(event="applied", shape=current, x=s["x"], y=s["y"], width=s["width"], height=s["height"], hotX=s["hotX"], hotY=s["hotY"])), flush=True)
+            time.sleep(.01)
+    finally:
+        cursor.close(sdl_pid=args.pid)
+        print('{"event":"sdl-hidden-cursor-restored"}', flush=True)
+
+
+if __name__ == "__main__":
+    main()
diff --git a/tools/run-cursor-poc-host.py b/tools/run-cursor-poc-host.py
new file mode 100644
index 0000000..4658995
--- /dev/null
+++ b/tools/run-cursor-poc-host.py
@@ -0,0 +1,73 @@
+"""Scoped VM100 interactive cursor exporter. No new network listener or system cursor theme."""
+import argparse
+import base64
+import json
+from pathlib import Path
+import runpy
+import sys
+
+sys.stdout.reconfigure(encoding="utf-8", errors="replace")
+parser = argparse.ArgumentParser(description=__doc__)
+parser.add_argument("action", choices=["start", "status", "export", "stop"])
+parser.add_argument("--output", type=Path)
+args = parser.parse_args()
+root = Path(__file__).resolve().parent
+t = runpy.run_path(str(root / "pve_term_exec.py"))
+v = runpy.run_path(str(root / "pve_vm.py"))
+ticket, csrf = t["login"]()
+if v["api"]("/api2/json/nodes/starhe/qemu/100/status/current", ticket=ticket).get("status") != "running":
+    sys.exit("VM100 is not running")
+command = r"$ErrorActionPreference='Stop'; $folder='C:\ProgramData\VDI\cursor-poc-20261103'; $task='VDICursorPOC'; "
+if args.action == "start":
+    payload = base64.b64encode((root / "cursor-poc-host.ps1").read_bytes()).decode()
+    command += r"""
+if(Get-ScheduledTask -TaskName $task -ErrorAction SilentlyContinue) { throw 'Probe already exists' }
+$user=(Get-CimInstance Win32_ComputerSystem).UserName
+if(-not $user) { throw 'No interactive user' }
+New-Item -ItemType Directory -Force $folder | Out-Null
+$acl=Get-Acl $folder
+$acl.SetAccessRule((New-Object Security.AccessControl.FileSystemAccessRule($user,'Modify','ContainerInherit,ObjectInherit','None','Allow')))
+Set-Acl $folder $acl
+Remove-Item "$folder\error.txt","$folder\state.json","$folder\shapes.json" -ErrorAction SilentlyContinue
+[IO.File]::WriteAllBytes("$folder\probe.ps1",[Convert]::FromBase64String('__PAYLOAD__'))
+$a=New-ScheduledTaskAction -Execute powershell.exe -Argument "-NoProfile -STA -ExecutionPolicy Bypass -WindowStyle Hidden -File $folder\probe.ps1"
+$p=New-ScheduledTaskPrincipal -UserId $user -LogonType Interactive -RunLevel Limited
+$s=New-ScheduledTaskSettingsSet -ExecutionTimeLimit (New-TimeSpan -Minutes 9)
+Register-ScheduledTask -TaskName $task -Action $a -Principal $p -Settings $s | Out-Null
+Start-ScheduledTask -TaskName $task
+Start-Sleep -Seconds 3
+if(Test-Path "$folder\error.txt") { throw (Get-Content "$folder\error.txt" -Raw) }
+if(-not(Test-Path "$folder\shapes.json")) { throw 'No fresh cursor export' }
+'Cursor probe started'
+""".replace("__PAYLOAD__", payload)
+elif args.action == "export":
+    command += 'Get-Content "$folder\\shapes.json" -Raw'
+elif args.action == "status":
+    command += r"""
+Get-Content "$folder\state.json" -Raw
+Get-Content "$folder\clicks.csv"
+Get-Content "$folder\states.csv"
+Get-Content "$folder\error.txt" -ErrorAction SilentlyContinue
+"""
+else:
+    command += r"""
+Stop-ScheduledTask -TaskName $task -ErrorAction SilentlyContinue
+Unregister-ScheduledTask -TaskName $task -Confirm:$false -ErrorAction SilentlyContinue
+if(Test-Path "$folder\pid.txt") {
+    $probePid=[int](Get-Content "$folder\pid.txt")
+    $process=Get-CimInstance Win32_Process -Filter "ProcessId=$probePid"
+    if($process.CommandLine -like '*cursor-poc-20261103*') { Stop-Process -Id $probePid -ErrorAction SilentlyContinue }
+}
+'Cursor probe stopped'
+"""
+out, error = v["agent"](ticket, csrf, ["powershell.exe", "-NoProfile", "-Command", command])
+if error or not out or out == "TIMEOUT":
+    sys.exit(error or out or "Empty guest-agent result")
+if args.action == "export":
+    data = json.loads(out.lstrip("\ufeff"))
+    if args.output:
+        args.output.parent.mkdir(parents=True, exist_ok=True)
+        args.output.write_text(json.dumps(data, separators=(",", ":")), encoding="utf-8")
+    print(json.dumps([{k: s[k] for k in ("name", "width", "height", "hotX", "hotY", "monochrome", "invertedPixels")} for s in data["shapes"]]))
+else:
+    print(out)
diff --git a/tools/test-cursor-poc.py b/tools/test-cursor-poc.py
new file mode 100644
index 0000000..833253c
--- /dev/null
+++ b/tools/test-cursor-poc.py
@@ -0,0 +1,50 @@
+"""Cursor asset boundary/fallback tests; run on Linux (same fcntl environment as box)."""
+import copy
+import importlib.util
+from pathlib import Path
+import tempfile
+import time
+import unittest
+
+spec=importlib.util.spec_from_file_location("cursor_poc",Path(__file__).with_name("cursor-poc-x11.py"))
+m=importlib.util.module_from_spec(spec); spec.loader.exec_module(m)
+
+class Boundaries(unittest.TestCase):
+    def setUp(self):
+        self.asset=dict(version=1,shapes=[dict(name="arrow",width=1,height=1,hotX=0,hotY=0,invertedPixels=0,argb=[0xffffffff])])
+    def bad(self,key,value):
+        data=copy.deepcopy(self.asset); data["shapes"][0][key]=value
+        with self.assertRaises(ValueError): m.validate_assets(data)
+    def test_valid(self): self.assertIn("arrow",m.validate_assets(self.asset))
+    def test_dimensions(self):
+        for v in (-1,0,129,True,"32"): self.bad("width",v)
+    def test_hotspot(self):
+        for v in (-1,1): self.bad("hotX",v)
+    def test_xor_requires_fallback(self): self.bad("invertedPixels",1)
+    def test_pixels(self):
+        for v in ([],[True],[-1],[0x100000000],[0,0]): self.bad("argb",v)
+    def test_duplicate_shapes(self):
+        self.asset["shapes"]*=2
+        with self.assertRaises(ValueError): m.validate_assets(self.asset)
+    def test_envelopes(self):
+        for v in (None,[],{},dict(version=True,shapes=self.asset["shapes"])):
+            with self.assertRaises(ValueError): m.validate_assets(v)
+    def test_lease(self):
+        shapes=m.validate_assets(self.asset)
+        for expires in (time.time()-1,time.time()+60,float("nan"),float("inf"),True):
+            with self.assertRaises(ValueError): m.validate_state(dict(version=1,visible=True,shape="arrow",expires=expires),shapes)
+    def test_state(self):
+        shapes=m.validate_assets(self.asset)
+        state=dict(version=1,visible=True,shape="arrow",expires=time.time()+1)
+        self.assertEqual(m.validate_state(state,shapes),"arrow")
+        state["visible"]=False
+        self.assertEqual(m.validate_state(state,shapes),"__hidden")
+        for key,value in (("visible",1),("shape","missing"),("shape",[]),("version",True)):
+            bad=dict(state); bad[key]=value
+            with self.assertRaises(ValueError): m.validate_state(bad,shapes)
+    def test_oversize_file(self):
+        with tempfile.TemporaryDirectory() as d:
+            p=Path(d)/"data.json"; p.write_text(" "*1025)
+            with self.assertRaises(ValueError): m.read_json(p,1024)
+
+if __name__=="__main__": unittest.main()
diff --git a/tools/verify-cursor-poc-box.py b/tools/verify-cursor-poc-box.py
new file mode 100644
index 0000000..73fe9cb
--- /dev/null
+++ b/tools/verify-cursor-poc-box.py
@@ -0,0 +1,120 @@
+#!/usr/bin/env python3
+"""Controlled existing-stream POC; always restores the remote-video cursor toggle.
+
+Only run with cursor-poc-host.ps1's disposable foreground window on Windows.
+Shape selections here are scripted replay, NOT automatic host synchronization.
+"""
+import importlib.util
+import json
+import os
+from pathlib import Path
+import signal
+import subprocess as S
+import time
+
+ROOT = Path(__file__).resolve().parent
+os.environ.update(DISPLAY=":0", XAUTHORITY="/home/armbian/.Xauthority")
+spec = importlib.util.spec_from_file_location("cursor_poc", ROOT / "cursor-poc-x11.py")
+m = importlib.util.module_from_spec(spec); spec.loader.exec_module(m)
+OUT = ROOT / "cursor-poc-evidence-v3"
+OUT.mkdir(exist_ok=False)  # Never overwrite earlier evidence.
+
+def xd(*args):
+    return S.check_output(["xdotool", *map(str,args)], text=True).strip()
+
+pid = int(xd("getwindowfocus", "getwindowpid"))
+window = int(xd("getwindowfocus"))
+cmd = Path(f"/proc/{pid}/cmdline").read_bytes().replace(b"\0", b" ")
+if b"/moonlight " not in cmd or b" stream 192.168.1.70 Desktop " not in cmd or b" --absolute-mouse " not in cmd:
+    raise RuntimeError("Unexpected foreground process")
+assets = m.validate_assets(m.read_json(ROOT / "windows-shapes.json", 4*1024*1024))
+cursor = m.LocalCursor(window)
+if any(cursor.snapshot()["argb"]):
+    cursor.close(); raise RuntimeError("Original local cursor is not hidden")
+hidden_remote = False
+paused = False
+records = []
+def interrupted(signum, frame):
+    raise SystemExit(128+signum)
+signal.signal(signal.SIGTERM, interrupted)
+signal.signal(signal.SIGINT, interrupted)
+
+def focus():
+    if int(xd("getwindowfocus", "getwindowpid")) != pid:
+        raise RuntimeError("Moonlight lost foreground; stop the POC")
+
+def capture(name):
+    with (OUT / (name+".xwd")).open("wb") as f:
+        S.run(["xwd", "-root", "-silent"], stdout=f, check=True)
+
+try:
+    cursor.cursors = {k: cursor.create(v) for k,v in assets.items()}
+    cursor.cursors["__hidden"] = cursor.create(dict(width=1,height=1,hotX=0,hotY=0,argb=[0]))
+    focus(); xd("mousemove", 320, 500); time.sleep(.8)
+    capture("01-remote-cursor")
+    focus(); xd("key", "ctrl+alt+shift+n"); hidden_remote=True
+    xd("mousemove",321,500); time.sleep(1.0)
+    capture("02-video-cursor-disabled")
+    for name,x in (("arrow",320),("ibeam",960),("sizewe",1600),("wait",2240),("__hidden",320)):
+        focus(); y=1250 if name=="__hidden" else 500
+        xd("mousemove", x,y); time.sleep(.25)
+        cursor.apply(cursor.cursors[name]); time.sleep(.05)
+        snap=cursor.snapshot()
+        (OUT/(name+".json")).write_text(json.dumps(snap))
+        if name=="__hidden":
+            assert not any(snap["argb"]), "Hidden cursor still has visible pixels"
+        else:
+            a=assets[name]
+            assert (snap["width"],snap["height"],snap["hotX"],snap["hotY"]) == (a["width"],a["height"],a["hotX"],a["hotY"])
+            assert any(snap["argb"]), "Visible cursor has no pixels"
+        assert (snap["x"],snap["y"])==(x,y)
+        records.append(dict(shape=name,x=x,y=y,visible=any(snap["argb"])))
+        time.sleep(.3)  # Allow the host probe to observe the real shape/visibility.
+    focus(); xd("mousemove",320,500); cursor.apply(cursor.cursors["arrow"]); time.sleep(.4)
+    # Freeze only this client for < 0.5s; X11 cursor must move while its video/input
+    # event processing is stopped. SIGCONT is guaranteed before cursor restoration.
+    os.kill(pid,signal.SIGSTOP); paused=True
+    try:
+        first=cursor.snapshot()
+        xd("mousemove",500,650); time.sleep(.12)
+        second=cursor.snapshot()
+        assert (second["x"],second["y"])==(500,650)
+        assert first["argb"]==second["argb"]
+        records.append(dict(test="client-paused-local-motion",before=[first["x"],first["y"]],after=[second["x"],second["y"]],passed=True))
+    finally:
+        os.kill(pid,signal.SIGCONT); paused=False
+    time.sleep(.5)
+    # Click only within the disposable Windows form. Scripted shape replay is
+    # deliberately distinct from the not-yet-implemented live cursor protocol.
+    for i in range(32):
+        focus(); n=i%4; x=320+640*n; y=600+(i//4)*20
+        cursor.apply(cursor.cursors[("arrow","ibeam","sizewe","wait")[n]])
+        xd("mousemove",x,y); time.sleep(.06); xd("click",1); time.sleep(.06)
+    capture("03-local-mode-video-only")
+    # Verify the actual helper's lease failure path while video cursor is hidden.
+    cursor.apply(cursor.original)
+    lease=OUT/"lease.json"
+    lease.write_text(json.dumps(dict(version=1,shape="arrow",visible=True,expires=time.time()+.8)))
+    result=S.run(["python3",str(ROOT/"cursor-poc-x11.py"),"--window",str(window),"--pid",str(pid),
+                  "--assets",str(ROOT/"windows-shapes.json"),"--state",str(lease),"--seconds","3"],
+                 capture_output=True,text=True,timeout=5)
+    (OUT/"lease-expiry.log").write_text(result.stdout+result.stderr)
+    assert result.returncode==0 and "lease-ended" in result.stdout and "sdl-hidden-cursor-restored" in result.stdout
+    # Xorg can briefly have no current cursor image after another connection's
+    # final cursor resource is released. Trigger pointer recomputation before
+    # checking the *post-exit* image; do not mistake this for an alpha image.
+    xd("mousemove",2240,741); time.sleep(.1)
+    assert not any(cursor.snapshot()["argb"])
+    records.append(dict(test="helper-lease-expiry",passed=True))
+finally:
+    if paused: os.kill(pid,signal.SIGCONT)
+    try:
+        cursor.close(sdl_pid=pid)
+    finally:
+        # Remote restoration must still run when local cleanup raises an error.
+        if hidden_remote:
+            xd("windowactivate","--sync",window); focus()
+            xd("key","ctrl+alt+shift+n"); time.sleep(.8)
+            capture("04-remote-cursor-restored")
+        (OUT/"results.json").write_text(json.dumps(records,indent=2))
+        print(json.dumps(dict(restored_remote_cursor=hidden_remote,records=records)),flush=True)