diff --git a/HomeAssistantCommandPalette/HomeAssistantCommandPalette.csproj b/HomeAssistantCommandPalette/HomeAssistantCommandPalette.csproj
index ccd42a7..ebe1e61 100644
--- a/HomeAssistantCommandPalette/HomeAssistantCommandPalette.csproj
+++ b/HomeAssistantCommandPalette/HomeAssistantCommandPalette.csproj
@@ -77,7 +77,7 @@
     <ProjectCapability Include="Msix" />
   </ItemGroup>
   <ItemGroup>
-    <PackageReference Include="Microsoft.CommandPalette.Extensions" />
+    <PackageReference Include="Microsoft.CommandPalette.Extensions" GeneratePathProperty="true" />
     <PackageReference Include="Microsoft.Extensions.Caching.Memory" />
     <PackageReference Include="Microsoft.Windows.CsWinRT" />
     <PackageReference Include="Shmuelie.WinRTServer" />
@@ -115,4 +115,21 @@
     <PublishTrimmed>true</PublishTrimmed>
     <ILLinkTreatWarningsAsErrors>false</ILLinkTreatWarningsAsErrors>
   </PropertyGroup>
+
+  <!--
+    The CmdPal host builds the cross-process proxy for IExtension from the
+    interface metadata, so Microsoft.CommandPalette.Extensions.winmd MUST ship
+    in the package. The SDK package marks it CopyToOutputDirectory but not
+    CopyToPublishDirectory, so `dotnet publish` (and therefore the packed MSIX)
+    drops it — without it, activation fails with E_NOINTERFACE (0x80004002) and
+    the extension shows no commands. Force it into the publish output.
+  -->
+  <Target Name="IncludeCmdPalSdkWinmdInPublish" BeforeTargets="ComputeFilesToPublish">
+    <ItemGroup>
+      <ResolvedFileToPublish Include="$(PkgMicrosoft_CommandPalette_Extensions)\winmd\Microsoft.CommandPalette.Extensions.winmd">
+        <RelativePath>Microsoft.CommandPalette.Extensions.winmd</RelativePath>
+        <CopyToPublishDirectory>PreserveNewest</CopyToPublishDirectory>
+      </ResolvedFileToPublish>
+    </ItemGroup>
+  </Target>
 </Project>
diff --git a/HomeAssistantCommandPalette/build-msix.ps1 b/HomeAssistantCommandPalette/build-msix.ps1
index 0ff5bc5..0752f37 100644
--- a/HomeAssistantCommandPalette/build-msix.ps1
+++ b/HomeAssistantCommandPalette/build-msix.ps1
@@ -12,11 +12,8 @@
   Steps per platform:
     1. dotnet publish with WindowsPackageType=MSIX
     2. Stage publish output, patch AppxManifest (Version, ProcessorArchitecture, Publisher)
-    3. Override Microsoft.CommandPalette.Extensions.dll/winmd with the
-       vendored copy from tools/cmdpal-sdk (NuGet WinRT IIDs don't match
-       what CmdPal expects)
-    4. makeappx pack -> .msix
-    5. (optional) signtool sign with PFX cert
+    3. makeappx pack -> .msix
+    4. (optional) signtool sign with PFX cert
 #>
 param(
     [Parameter(Mandatory = $true)]
@@ -50,9 +47,7 @@ $ErrorActionPreference = "Stop"
 
 $ExtensionName = "HomeAssistantCommandPalette"
 $ProjectDir    = $PSScriptRoot
-$RepoRoot      = Split-Path -Parent $ProjectDir
 $ProjectFile   = Join-Path $ProjectDir "$ExtensionName.csproj"
-$VendorSdkDir  = Join-Path $RepoRoot "tools\cmdpal-sdk"
 
 if (-not $OutputDir) { $OutputDir = Join-Path $ProjectDir "bin\Release\msix" }
 New-Item -Path $OutputDir -ItemType Directory -Force | Out-Null
@@ -74,13 +69,6 @@ foreach ($t in @($makeappx, $signtool)) {
 }
 Write-Host "SDK bin:    $($sdkBin.FullName)" -ForegroundColor Yellow
 
-# ---------- Validate vendored SDK ----------
-foreach ($f in @("Microsoft.CommandPalette.Extensions.dll", "Microsoft.CommandPalette.Extensions.winmd")) {
-    if (-not (Test-Path (Join-Path $VendorSdkDir $f))) {
-        throw "Missing vendored SDK file: $f. See tools/cmdpal-sdk/README.md."
-    }
-}
-
 # ---------- Resolve PFX once if provided ----------
 $signingPfx = $null
 if ($CertBase64) {
@@ -149,14 +137,6 @@ try {
 
         Remove-Item (Join-Path $stagingDir "Package.appxmanifest") -ErrorAction SilentlyContinue
 
-        # ---------- 3. Override SDK DLL/winmd with vendored copy ----------
-        # NuGet 0.9.260303001 IIDs don't match CmdPal's internal 0.9.260326002 —
-        # cast to (ICommandProvider) fails silently without this override.
-        Copy-Item (Join-Path $VendorSdkDir "Microsoft.CommandPalette.Extensions.dll") `
-                  (Join-Path $stagingDir "Microsoft.CommandPalette.Extensions.dll") -Force
-        Copy-Item (Join-Path $VendorSdkDir "Microsoft.CommandPalette.Extensions.winmd") `
-                  (Join-Path $stagingDir "Microsoft.CommandPalette.Extensions.winmd") -Force
-
         New-Item -ItemType Directory -Path (Join-Path $stagingDir "Public") -Force | Out-Null
 
         foreach ($strip in @("build-exe.ps1", "setup-template.iss", "build-msix.ps1", "*.pdb", "app.manifest")) {
@@ -166,7 +146,7 @@ try {
         $appPackagesNested = Join-Path $stagingDir "AppPackages"
         if (Test-Path $appPackagesNested) { Remove-Item $appPackagesNested -Recurse -Force }
 
-        # ---------- 4. makeappx pack ----------
+        # ---------- 3. makeappx pack ----------
         $msixName = "${ExtensionName}_${Version}.0_${Platform}.msix"
         $msixPath = Join-Path $OutputDir $msixName
         Remove-Item $msixPath -Force -ErrorAction SilentlyContinue
@@ -174,7 +154,7 @@ try {
         & $makeappx pack /d $stagingDir /p $msixPath /nv /o
         if ($LASTEXITCODE -ne 0) { throw "makeappx pack failed for $Platform (exit $LASTEXITCODE)" }
 
-        # ---------- 5. Optional signing ----------
+        # ---------- 4. Optional signing ----------
         if ($signingPfx) {
             Write-Host "Signing $msixName" -ForegroundColor Yellow
             $signArgs = @('sign', '/fd', 'SHA256', '/f', $signingPfx)
diff --git a/tools/cmdpal-sdk/Microsoft.CommandPalette.Extensions.dll b/tools/cmdpal-sdk/Microsoft.CommandPalette.Extensions.dll
deleted file mode 100644
index 69a6210..0000000
Binary files a/tools/cmdpal-sdk/Microsoft.CommandPalette.Extensions.dll and /dev/null differ
diff --git a/tools/cmdpal-sdk/Microsoft.CommandPalette.Extensions.winmd b/tools/cmdpal-sdk/Microsoft.CommandPalette.Extensions.winmd
deleted file mode 100644
index 8aa9661..0000000
Binary files a/tools/cmdpal-sdk/Microsoft.CommandPalette.Extensions.winmd and /dev/null differ
diff --git a/tools/cmdpal-sdk/README.md b/tools/cmdpal-sdk/README.md
deleted file mode 100644
index bcaba6d..0000000
--- a/tools/cmdpal-sdk/README.md
+++ /dev/null
@@ -1,45 +0,0 @@
-# Vendored Command Palette SDK
-
-This directory holds a copy of `Microsoft.CommandPalette.Extensions.dll` /
-`.winmd` extracted from a specific Microsoft Command Palette install.
-
-## Why it's vendored
-
-Microsoft ships a newer SDK build inside the Command Palette MSIX than the
-latest version published to NuGet (`Microsoft.CommandPalette.Extensions`).
-The WinRT IIDs differ between versions, so an extension built against the
-NuGet package fails CmdPal's `(ICommandProvider)result` cast at activation —
-silently — and never appears in the palette. See PowerToys#47076 / #38273.
-
-The build script (`HomeAssistantCommandPalette/build-msix.ps1`) overrides the
-NuGet-shipped DLL/winmd with the files from this directory before packing
-the MSIX, so the runtime IIDs match what CmdPal expects.
-
-The vendored assembly and WinMD are architecture-neutral metadata/managed
-assets, so the same files are used for both x64 and arm64 packages. If a
-future Command Palette release ships architecture-specific SDK binaries,
-re-extract these files from the matching architecture install and note it
-below.
-
-## Source version
-
-Extracted from:
-
-- Package: `Microsoft.CommandPalette_0.9.10852.0_x64__8wekyb3d8bbwe`
-- File version: `0.9.2603.26002`
-
-## Updating
-
-When CmdPal updates and our extension stops loading after a CmdPal upgrade,
-re-extract the DLL from the new install:
-
-```powershell
-$src = (Get-AppxPackage Microsoft.CommandPalette).InstallLocation
-Copy-Item "$src\Microsoft.CommandPalette.Extensions.dll" tools\cmdpal-sdk\ -Force
-Copy-Item "$src\Microsoft.CommandPalette.Extensions.winmd" tools\cmdpal-sdk\ -Force
-```
-
-Update the version note above. Commit. Bump the extension version and ship.
-
-This whole song-and-dance can be removed once Microsoft publishes the matching
-SDK version to NuGet.