diff --git a/deploy.bat b/deploy.bat
index 4cf54e6..8e01dbb 100644
--- a/deploy.bat
+++ b/deploy.bat
@@ -1,53 +1,57 @@
-@echo off
-setlocal enabledelayedexpansion
-
-echo.
-echo ================================================================================
-echo  Commonwealth Online - Qt Host Deployment
-echo ================================================================================
-echo.
-
-set QT6_PATH=
-if exist "C:\Qt\6.11.1\msvc2022_64\bin" set QT6_PATH=C:\Qt\6.11.1\msvc2022_64
-if "!QT6_PATH!"=="" if exist "C:\Qt\6.10.2\msvc2022_64\bin" set QT6_PATH=C:\Qt\6.10.2\msvc2022_64
-if "!QT6_PATH!"=="" if exist "C:\Qt\6.8.0\msvc2022_64\bin" set QT6_PATH=C:\Qt\6.8.0\msvc2022_64
-if "!QT6_PATH!"=="" (
-    echo ERROR: Could not find Qt6 installation.
-    exit /b 1
-)
-
-set DEPLOY_DIR=%cd%\build\bin\Release
-if not exist "!DEPLOY_DIR!\CommonwealthOnlineHost.exe" (
-    echo ERROR: Host executable not found. Run build.bat first.
-    exit /b 1
-)
-
-set DLLS=Qt6Core.dll Qt6Gui.dll Qt6Widgets.dll Qt6Network.dll Qt6Concurrent.dll Qt6DBus.dll Qt6Xml.dll
-for %%D in (%DLLS%) do (
-    if exist "!QT6_PATH!\bin\%%D" copy /Y "!QT6_PATH!\bin\%%D" "!DEPLOY_DIR!\%%D" >nul
-)
-
-if not exist "!DEPLOY_DIR!\plugins" mkdir "!DEPLOY_DIR!\plugins"
-xcopy /Y /Q /I "!QT6_PATH!\plugins\platforms" "!DEPLOY_DIR!\plugins\platforms\" >nul
-xcopy /Y /Q /I "!QT6_PATH!\plugins\styles" "!DEPLOY_DIR!\plugins\styles\" >nul 2>&1
-xcopy /Y /Q /I "!QT6_PATH!\plugins\imageformats" "!DEPLOY_DIR!\plugins\imageformats\" >nul 2>&1
-
-set SERVER_DIR=!DEPLOY_DIR!\server
-if not exist "!SERVER_DIR!\CommonwealthOnline.Server.exe" (
-    echo ERROR: Self-contained C# server is not staged beside the Host GUI.
-    echo        Run build.bat. CMake publishes the server during the Host GUI build.
-    exit /b 1
-)
-
-if exist "!SERVER_DIR!\*.py" (
-    echo ERROR: Python source found in staged server package.
-    exit /b 1
-)
-
-echo.
-echo Deployment complete:
-echo   !DEPLOY_DIR!\CommonwealthOnlineHost.exe
-echo   !SERVER_DIR!\CommonwealthOnline.Server.exe
-echo.
-echo Copy the entire Release directory when distributing. Python and a separate .NET runtime are not required.
-exit /b 0
+@echo off
+setlocal enabledelayedexpansion
+
+echo.
+echo ================================================================================
+echo  Commonwealth Online - Qt Host Deployment
+echo ================================================================================
+echo.
+
+set QT6_PATH=
+if exist "C:\Qt\6.11.1\msvc2022_64\bin" set QT6_PATH=C:\Qt\6.11.1\msvc2022_64
+if "!QT6_PATH!"=="" if exist "C:\Qt\6.10.2\msvc2022_64\bin" set QT6_PATH=C:\Qt\6.10.2\msvc2022_64
+if "!QT6_PATH!"=="" if exist "C:\Qt\6.8.0\msvc2022_64\bin" set QT6_PATH=C:\Qt\6.8.0\msvc2022_64
+if "!QT6_PATH!"=="" (
+    echo ERROR: Could not find Qt6 installation.
+    exit /b 1
+)
+
+set DEPLOY_DIR=%cd%\build\bin\Release
+if not exist "!DEPLOY_DIR!\CommonwealthOnlineHost.exe" (
+    echo ERROR: Host executable not found. Run build.bat first.
+    exit /b 1
+)
+
+set DLLS=Qt6Core.dll Qt6Gui.dll Qt6Widgets.dll Qt6Network.dll Qt6Concurrent.dll Qt6DBus.dll Qt6Xml.dll
+for %%D in (%DLLS%) do (
+    if exist "!QT6_PATH!\bin\%%D" copy /Y "!QT6_PATH!\bin\%%D" "!DEPLOY_DIR!\%%D" >nul
+)
+
+if not exist "!DEPLOY_DIR!\plugins" mkdir "!DEPLOY_DIR!\plugins"
+xcopy /Y /Q /I "!QT6_PATH!\plugins\platforms" "!DEPLOY_DIR!\plugins\platforms\" >nul
+xcopy /Y /Q /I "!QT6_PATH!\plugins\styles" "!DEPLOY_DIR!\plugins\styles\" >nul 2>&1
+xcopy /Y /Q /I "!QT6_PATH!\plugins\imageformats" "!DEPLOY_DIR!\plugins\imageformats\" >nul 2>&1
+
+set SERVER_DIR=!DEPLOY_DIR!\server
+if not exist "!SERVER_DIR!\CommonwealthOnline.Server.exe" (
+    echo ERROR: Self-contained C# server is not staged beside the Host GUI.
+    echo        Run build.bat. CMake publishes the server during the Host GUI build.
+    exit /b 1
+)
+
+set PROHIBITED_FOUND=0
+for /r "!SERVER_DIR!" %%F in (*.py *.pyw *.pyi *.pyc *.pyo *.whl *.egg requirements*.txt Pipfile Pipfile.lock pyproject.toml poetry.lock setup.py setup.cfg tox.ini) do (
+    if exist "%%F" (
+        echo ERROR: Prohibited legacy runtime artifact found in staged package: %%F
+        set PROHIBITED_FOUND=1
+    )
+)
+if "!PROHIBITED_FOUND!"=="1" exit /b 1
+
+echo.
+echo Deployment complete:
+echo   !DEPLOY_DIR!\CommonwealthOnlineHost.exe
+echo   !SERVER_DIR!\CommonwealthOnline.Server.exe
+echo.
+echo Copy the entire Release directory when distributing. The bundled server is self-contained.
+exit /b 0