diff --git a/.gitignore b/.gitignore
index 7ce5928..cdae156 100644
--- a/.gitignore
+++ b/.gitignore
@@ -35,6 +35,7 @@ src-tauri/binaries/
 src-tauri/resources/daw_engine/
 src-tauri/resources/native_host/*
 !src-tauri/resources/native_host/.gitkeep
+!src-tauri/resources/native_host/*.dll
 src-tauri/vc_redist.x64.exe
 app/storage/plugin_dirs.json
 app/storage/sf_scan_state.json.bak-root
diff --git a/build_windows.ps1 b/build_windows.ps1
index 070af68..d4e4684 100644
--- a/build_windows.ps1
+++ b/build_windows.ps1
@@ -69,28 +69,45 @@ Write-Host "== [4b/6] Native host bridges (CMake/MSVC) + FluidSynth runtime =="
 # trong resources/native_host/ de exe tim thay luc runtime (Rust: resource_dir/
 # native_host; Python: SF_RESOURCE_DIR/native_host). Thieu -> native audio /
 # VST GUI khong chay tren may cai sach.
-if (-not (Test-Path "native_host\build\CMakeCache.txt")) {
-  if (-not $env:VST3_SDK_ROOT) {
-    Write-Host "ERROR: can VST3_SDK_ROOT env (duong dan VST3 SDK) khi chua co native_host\build" -ForegroundColor Red
-    exit 1
+#
+# Prebuilt: 3 bridge DLL (~175KB) DUOC COMMIT vao src-tauri/resources/native_host/
+# (.gitignore cho phep *.dll) de nguoi dung clone moi KHONG can VST3 SDK
+# (Steinberg SDK ban quyen) + khong can MSVC/cmake. Chi build tu source khi
+# ca 3 DLL deu thieu (may dev tu build bridge moi).
+$bridgeDlls = @("sf_host_bridge.dll","vst2_host_bridge.dll","vst3_host_bridge.dll")
+$havePrebuilt = $true
+foreach ($dllName in $bridgeDlls) {
+  if (-not (Test-Path "src-tauri\resources\native_host\$dllName")) { $havePrebuilt = $false }
+}
+if ($havePrebuilt) {
+  Write-Host "Dung prebuilt bridge DLL (resources/native_host) - skip cmake build, khong can VST3 SDK."
+} else {
+  if (-not (Test-Path "native_host\build\CMakeCache.txt")) {
+    if (-not $env:VST3_SDK_ROOT) {
+      Write-Host "ERROR: thieu prebuilt bridge DLL + khong co native_host\build + VST3_SDK_ROOT chua set." -ForegroundColor Red
+      Write-Host "  Cach 1 (khuyen nghi): git pull lai de co src-tauri/resources/native_host/*.dll (prebuilt)." -ForegroundColor Yellow
+      Write-Host "  Cach 2 (dev): set env VST3_SDK_ROOT tro den VST3 SDK roi build lai native_host." -ForegroundColor Yellow
+      exit 1
+    }
+    & cmake -S native_host -B native_host\build -A x64 -DVST3_SDK_ROOT="$env:VST3_SDK_ROOT"
+    if ($LASTEXITCODE -ne 0) { Write-Host "ERROR: cmake configure native_host that bai" -ForegroundColor Red; exit 1 }
   }
-  & cmake -S native_host -B native_host\build -A x64 -DVST3_SDK_ROOT="$env:VST3_SDK_ROOT"
-  if ($LASTEXITCODE -ne 0) { Write-Host "ERROR: cmake configure native_host that bai" -ForegroundColor Red; exit 1 }
-}
-& cmake --build native_host\build --config Release
-if ($LASTEXITCODE -ne 0) { Write-Host "ERROR: cmake build native_host that bai" -ForegroundColor Red; exit 1 }
-
-if (-not (Test-Path "native_host\fluidsynth_runtime\libfluidsynth-3.dll")) {
-  python native_host\scripts\dl_fluidsynth_runtime.py
-  if ($LASTEXITCODE -ne 0) { Write-Host "ERROR: dl_fluidsynth_runtime that bai" -ForegroundColor Red; exit 1 }
+  & cmake --build native_host\build --config Release
+  if ($LASTEXITCODE -ne 0) { Write-Host "ERROR: cmake build native_host that bai" -ForegroundColor Red; exit 1 }
+  Copy-Item "native_host\build\Release\vst2_host_bridge.dll","native_host\build\Release\vst3_host_bridge.dll","native_host\build\Release\sf_host_bridge.dll" "src-tauri\resources\native_host\"
 }
 
-if (Test-Path "src-tauri\resources\native_host") {
-  Remove-Item -Recurse -Force "src-tauri\resources\native_host"
+# fluidsynth_runtime (14.8MB, gitignore) - khong commit; tu dong tai neu thieu.
+if (-not (Test-Path "src-tauri\resources\native_host\fluidsynth_runtime\libfluidsynth-3.dll")) {
+  if (-not (Test-Path "native_host\fluidsynth_runtime\libfluidsynth-3.dll")) {
+    python native_host\scripts\dl_fluidsynth_runtime.py
+    if ($LASTEXITCODE -ne 0) { Write-Host "ERROR: dl_fluidsynth_runtime that bai" -ForegroundColor Red; exit 1 }
+  }
+  New-Item -ItemType Directory -Force "src-tauri\resources\native_host\fluidsynth_runtime" | Out-Null
+  Copy-Item "native_host\fluidsynth_runtime\*" "src-tauri\resources\native_host\fluidsynth_runtime\" -Recurse -Force
+} else {
+  Write-Host "Da co fluidsynth_runtime trong resources/native_host."
 }
-New-Item -ItemType Directory -Force "src-tauri\resources\native_host" | Out-Null
-Copy-Item "native_host\build\Release\vst2_host_bridge.dll","native_host\build\Release\vst3_host_bridge.dll","native_host\build\Release\sf_host_bridge.dll" "src-tauri\resources\native_host\"
-Copy-Item "native_host\fluidsynth_runtime" "src-tauri\resources\native_host\fluidsynth_runtime" -Recurse -Force
 
 Write-Host "== [5/6] VC++ Redistributable cho hooks.nsh =="
 if (-not (Test-Path src-tauri\vc_redist.x64.exe)) {
diff --git a/src-tauri/resources/native_host/sf_host_bridge.dll b/src-tauri/resources/native_host/sf_host_bridge.dll
new file mode 100644
index 0000000..5a38864
Binary files /dev/null and b/src-tauri/resources/native_host/sf_host_bridge.dll differ
diff --git a/src-tauri/resources/native_host/vst2_host_bridge.dll b/src-tauri/resources/native_host/vst2_host_bridge.dll
new file mode 100644
index 0000000..8b3da5b
Binary files /dev/null and b/src-tauri/resources/native_host/vst2_host_bridge.dll differ
diff --git a/src-tauri/resources/native_host/vst3_host_bridge.dll b/src-tauri/resources/native_host/vst3_host_bridge.dll
new file mode 100644
index 0000000..96ba5a3
Binary files /dev/null and b/src-tauri/resources/native_host/vst3_host_bridge.dll differ