diff --git a/tools/device-check.ps1 b/tools/device-check.ps1
new file mode 100644
index 0000000..dc68991
--- /dev/null
+++ b/tools/device-check.ps1
@@ -0,0 +1,124 @@
+#Requires -Version 5.1
+<#
+.SYNOPSIS
+    清听真机自检：安装最新 debug APK，冷启动，抓 logcat，校验 libmpv 是否只有单实例。
+
+.DESCRIPTION
+    判定依据：
+      - 冷启动后 "PlaybackService 单例创建" 只出现一次；
+      - 日志里出现过的 serviceId 只有 1 个；
+      - media_kit Player 的 hashCode 只有 1 个。
+
+.EXAMPLE
+    powershell -ExecutionPolicy Bypass -File tools\device-check.ps1
+    powershell -ExecutionPolicy Bypass -File tools\device-check.ps1 -DeviceId 192.168.3.2:36569
+#>
+[CmdletBinding()]
+param(
+    [string]$DeviceId = '',
+    [string]$Apk = '',
+    [int]$WaitSeconds = 12
+)
+
+$ErrorActionPreference = 'Continue'  # adb 会往 stderr 写正常提示，用 Stop 会误判
+$root = Split-Path -Parent $PSScriptRoot
+if (-not $Apk) { $Apk = Join-Path $root 'build\app\outputs\flutter-apk\app-debug.apk' }
+$pkg = 'com.lxh.qingting_player'
+
+function Write-Step($msg) { Write-Host "==> $msg" -ForegroundColor Cyan }
+function Write-Ok($msg) { Write-Host "  OK  $msg" -ForegroundColor Green }
+function Write-Bad($msg) { Write-Host "  !!  $msg" -ForegroundColor Red }
+
+if (-not (Get-Command adb -ErrorAction SilentlyContinue)) {
+    throw '未找到 adb，请把 platform-tools 加入 PATH'
+}
+if (-not (Test-Path $Apk)) {
+    throw "APK 不存在：$Apk（先执行 gradlew assembleDebug）"
+}
+
+# ---------- 选择设备 ----------
+# 同一台手机可能同时存在多条 adb 通道（如无线调试 + mDNS），按 serialno 去重
+$devices = @(adb devices | Select-Object -Skip 1 | Where-Object { $_ -match '\sdevice$' } | ForEach-Object { ($_ -split '\s+')[0] })
+if ($DeviceId) {
+    if ($devices -notcontains $DeviceId) { throw "设备 $DeviceId 不在线，当前：$($devices -join ', ')" }
+} elseif ($devices.Count -eq 0) {
+    throw '没有在线设备，请先连接手机并授权 USB/无线调试'
+} elseif ($devices.Count -eq 1) {
+    $DeviceId = $devices[0]
+} else {
+    $bySerial = @{}
+    foreach ($entry in $devices) {
+        $serial = (& adb -s $entry shell getprop ro.serialno 2>$null | Out-String).Trim()
+        if ($serial) { $bySerial[$serial] = $entry }
+    }
+    if ($bySerial.Count -eq 1) {
+        $DeviceId = @($bySerial.Values)[0]
+        Write-Host "  (同一设备的多条 adb 通道，使用 $DeviceId)" -ForegroundColor DarkGray
+    } else {
+        throw "检测到多台设备，请用 -DeviceId 指定：$($devices -join ', ')"
+    }
+}
+
+$adb = { param($args) & adb -s $DeviceId @args }
+$model = (& adb -s $DeviceId shell getprop ro.product.model).Trim()
+$android = (& adb -s $DeviceId shell getprop ro.build.version.release).Trim()
+Write-Step "设备 $model (Android $android)  [$DeviceId]"
+
+# ---------- 安装 ----------
+Write-Step "安装 $([IO.Path]::GetFileName($Apk))"
+$install = & adb -s $DeviceId install -r $Apk 2>&1
+if (($install -join "`n") -notmatch 'Success') { Write-Bad ($install -join "`n"); exit 1 }
+Write-Ok '安装成功'
+
+# ---------- 冷启动 ----------
+Write-Step '冷启动并抓取日志'
+& adb -s $DeviceId shell am force-stop $pkg | Out-Null
+& adb -s $DeviceId logcat -c
+& adb -s $DeviceId shell monkey -p $pkg -c android.intent.category.LAUNCHER 1 2>&1 | Out-Null
+Start-Sleep -Seconds $WaitSeconds
+& adb -s $DeviceId logcat -d -v time > (Join-Path $root 'build\device-check-last.log')
+
+$logPath = Join-Path $root 'build\device-check-last.log'
+# 注意：PS 5.1 的 > 重定向写出的是 UTF-16LE（带 BOM），这里不要强制 utf8
+$log = Get-Content $logPath
+$text = $log -join "`n"
+
+# ---------- 判定 ----------
+Write-Step '实例检查'
+$serviceIds = @([regex]::Matches($text, 'serviceId=(\d+)') | ForEach-Object { $_.Groups[1].Value } | Sort-Object -Unique)
+$players = @([regex]::Matches($text, 'Player 已创建.*?player=(\d+)') | ForEach-Object { $_.Groups[1].Value } | Sort-Object -Unique)
+$creates = ([regex]::Matches($text, '\[PlaybackService\] 单例创建')).Count
+
+$failed = $false
+if ($creates -eq 1) { Write-Ok "PlaybackService 单例创建 x$creates" } else { Write-Bad "PlaybackService 单例创建 x$creates（应为 1）"; $failed = $true }
+if ($serviceIds.Count -eq 1) { Write-Ok "serviceId 唯一：$($serviceIds[0])" } else { Write-Bad "出现 $($serviceIds.Count) 个 serviceId：$($serviceIds -join ', ')"; $failed = $true }
+if ($players.Count -eq 1) { Write-Ok "Player 唯一：$($players[0])" } else { Write-Bad "出现 $($players.Count) 个 Player：$($players -join ', ')"; $failed = $true }
+
+# ---------- 系统侧 ----------
+Write-Step '系统 MediaSession'
+$sessionIds = @(& adb -s $DeviceId shell dumpsys media_session 2>&1 |
+    Select-String 'media-session com\.lxh\.qingting_player/media-session/(\d+)' |
+    ForEach-Object { $_.Matches[0].Groups[1].Value } | Sort-Object -Unique)
+if ($sessionIds.Count -eq 1) { Write-Ok "MediaSession 唯一：$($sessionIds[0])" }
+elseif ($sessionIds.Count -eq 0) { Write-Host '  -- 还没有 MediaSession（未开始播放，属正常）' -ForegroundColor DarkGray }
+else { Write-Bad "出现 $($sessionIds.Count) 个 MediaSession：$($sessionIds -join ', ')"; $failed = $true }
+
+# ---------- 崩溃 / 加载失败 ----------
+Write-Step '崩溃与原生库'
+$bad = $log | Select-String 'FATAL EXCEPTION|UnsatisfiedLinkError|Cannot load MediaKitAndroidHelper|Could not load'
+if ($bad) { $bad | Select-Object -First 5 | ForEach-Object { Write-Bad $_.Line.Trim() }; $failed = $true } else { Write-Ok '无崩溃、无 so 加载失败' }
+
+# ---------- 结果 ----------
+Write-Host ''
+if ($failed) {
+    Write-Host 'RESULT: FAIL —— 仍存在多实例或异常，完整日志：' -ForegroundColor Red
+    Write-Host "  $logPath"
+    exit 1
+}
+Write-Host 'RESULT: PASS —— 单引擎单实例' -ForegroundColor Green
+Write-Host "日志：$logPath"
+Write-Host ''
+Write-Host '还需要你手动确认（脚本无法代替耳朵和眼睛）：' -ForegroundColor Yellow
+Write-Host '  1. 放一首歌，确认只有一路声音（没有重影/叠音）'
+Write-Host '  2. 按通知栏暂停/播放，确认播放页状态同步变化'
+Write-Host '  3. 拖通知栏进度条，确认播放页进度跟着走'