diff --git a/README.md b/README.md
index 9c396971..d290676a 100644
--- a/README.md
+++ b/README.md
@@ -16,5 +16,8 @@ Run both application services from the repository root with:
 ./run.sh
 ```
 
-The startup script expects `backend/app/main.py` and
-`frontend/package.json` to be added by the implementation phase.
+On Windows, run `run.bat` instead.
+
+Python 3 and Node.js (including npm) must be installed first. Both startup
+scripts create `backend/.venv` and install the backend and frontend
+dependencies automatically when they are missing.
diff --git a/frontend/next-env.d.ts b/frontend/next-env.d.ts
index 9edff1c7..c4b7818f 100644
--- a/frontend/next-env.d.ts
+++ b/frontend/next-env.d.ts
@@ -1,6 +1,6 @@
 /// <reference types="next" />
 /// <reference types="next/image-types/global" />
-import "./.next/types/routes.d.ts";
+import "./.next/dev/types/routes.d.ts";
 
 // NOTE: This file should not be edited
 // see https://nextjs.org/docs/app/api-reference/config/typescript for more information.
diff --git a/run.bat b/run.bat
new file mode 100644
index 00000000..b6393e08
--- /dev/null
+++ b/run.bat
@@ -0,0 +1,94 @@
+@echo off
+setlocal EnableExtensions
+
+set "ROOT_DIR=%~dp0"
+set "BACKEND_HOST=%BACKEND_HOST%"
+set "BACKEND_PORT=%BACKEND_PORT%"
+set "FRONTEND_HOST=%FRONTEND_HOST%"
+set "FRONTEND_PORT=%FRONTEND_PORT%"
+
+if not defined BACKEND_HOST set "BACKEND_HOST=127.0.0.1"
+if not defined BACKEND_PORT set "BACKEND_PORT=8000"
+if not defined FRONTEND_HOST set "FRONTEND_HOST=127.0.0.1"
+if not defined FRONTEND_PORT set "FRONTEND_PORT=5173"
+if not defined PYTHON_BIN set "PYTHON_BIN=python"
+
+call "%PYTHON_BIN%" --version >nul 2>&1
+if errorlevel 1 (
+    if /i "%PYTHON_BIN%"=="python" (
+        call py --version >nul 2>&1
+        if not errorlevel 1 set "PYTHON_BIN=py"
+    )
+)
+set "BACKEND_VENV=%ROOT_DIR%backend\.venv"
+set "BACKEND_PYTHON=%BACKEND_VENV%\Scripts\python.exe"
+
+if not exist "%ROOT_DIR%backend\app\main.py" (
+    echo Backend entrypoint not found: backend\app\main.py
+    exit /b 1
+)
+
+if not exist "%ROOT_DIR%frontend\package.json" (
+    echo Frontend package manifest not found: frontend\package.json
+    exit /b 1
+)
+
+if not exist "%ROOT_DIR%backend\requirements.txt" (
+    echo Backend requirements not found: backend\requirements.txt
+    exit /b 1
+)
+
+call "%PYTHON_BIN%" --version >nul 2>&1
+if errorlevel 1 (
+    echo Python executable not found: %PYTHON_BIN%
+    echo Set PYTHON_BIN to the Python executable path and run this script again.
+    exit /b 1
+)
+
+where npm >nul 2>&1
+if errorlevel 1 (
+    echo npm is required to start the frontend.
+    exit /b 1
+)
+
+if not exist "%BACKEND_PYTHON%" (
+    echo Creating backend virtual environment...
+    call "%PYTHON_BIN%" -m venv "%BACKEND_VENV%"
+    if errorlevel 1 exit /b 1
+)
+
+call "%BACKEND_PYTHON%" -c "import build123d, dotenv, fastapi, httpx, jsonschema, multipart, uvicorn" >nul 2>&1
+if errorlevel 1 (
+    echo Installing backend dependencies...
+    call "%BACKEND_PYTHON%" -m pip install -r "%ROOT_DIR%backend\requirements.txt"
+    if errorlevel 1 exit /b 1
+)
+
+if not exist "%ROOT_DIR%frontend\node_modules\next" (
+    echo Installing frontend dependencies...
+    pushd "%ROOT_DIR%frontend"
+    if exist package-lock.json (
+        call npm ci
+    ) else (
+        call npm install
+    )
+    if errorlevel 1 (
+        popd
+        exit /b 1
+    )
+    popd
+)
+
+echo Starting backend on %BACKEND_HOST%:%BACKEND_PORT%
+start "CAD CDSL Backend" /D "%ROOT_DIR%backend" cmd /k call "%BACKEND_PYTHON%" -m uvicorn app.main:app --host %BACKEND_HOST% --port %BACKEND_PORT% --reload
+
+echo Starting frontend on %FRONTEND_HOST%:%FRONTEND_PORT%
+start "CAD CDSL Frontend" /D "%ROOT_DIR%frontend" cmd /k call npm run dev -- -H %FRONTEND_HOST% -p %FRONTEND_PORT%
+
+echo.
+echo Frontend: http://%FRONTEND_HOST%:%FRONTEND_PORT%
+echo Backend:  http://%BACKEND_HOST%:%BACKEND_PORT%
+echo The backend and frontend are running in separate command windows.
+echo Close those windows to stop the services.
+
+endlocal
diff --git a/run.sh b/run.sh
index 6feca844..d45995ad 100755
--- a/run.sh
+++ b/run.sh
@@ -7,6 +7,8 @@ BACKEND_PORT="${BACKEND_PORT:-8000}"
 FRONTEND_HOST="${FRONTEND_HOST:-127.0.0.1}"
 FRONTEND_PORT="${FRONTEND_PORT:-5173}"
 PYTHON_BIN="${PYTHON_BIN:-python3}"
+BACKEND_VENV="${ROOT_DIR}/backend/.venv"
+BACKEND_PYTHON="${BACKEND_VENV}/bin/python"
 
 cleanup() {
     local pids
@@ -28,6 +30,11 @@ if [[ ! -f "${ROOT_DIR}/frontend/package.json" ]]; then
     exit 1
 fi
 
+if [[ ! -f "${ROOT_DIR}/backend/requirements.txt" ]]; then
+    echo "Backend requirements not found: backend/requirements.txt"
+    exit 1
+fi
+
 command -v "${PYTHON_BIN}" >/dev/null 2>&1 || {
     echo "Python executable not found: ${PYTHON_BIN}"
     exit 1
@@ -38,10 +45,32 @@ command -v npm >/dev/null 2>&1 || {
     exit 1
 }
 
+if [[ ! -x "${BACKEND_PYTHON}" ]]; then
+    echo "Creating backend virtual environment..."
+    "${PYTHON_BIN}" -m venv "${BACKEND_VENV}"
+fi
+
+if ! "${BACKEND_PYTHON}" -c 'import build123d, dotenv, fastapi, httpx, jsonschema, multipart, uvicorn' >/dev/null 2>&1; then
+    echo "Installing backend dependencies..."
+    "${BACKEND_PYTHON}" -m pip install -r "${ROOT_DIR}/backend/requirements.txt"
+fi
+
+if [[ ! -d "${ROOT_DIR}/frontend/node_modules/next" ]]; then
+    echo "Installing frontend dependencies..."
+    (
+        cd "${ROOT_DIR}/frontend"
+        if [[ -f package-lock.json ]]; then
+            npm ci
+        else
+            npm install
+        fi
+    )
+fi
+
 echo "Starting backend on ${BACKEND_HOST}:${BACKEND_PORT}"
 (
     cd "${ROOT_DIR}/backend"
-    "${PYTHON_BIN}" -m uvicorn app.main:app \
+    "${BACKEND_PYTHON}" -m uvicorn app.main:app \
         --host "${BACKEND_HOST}" \
         --port "${BACKEND_PORT}" \
         --reload