diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..c716e28
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,33 @@
+name: CI
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  build:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, macos-latest, windows-latest]
+        build_type: [Release, Debug]
+    
+    steps:
+    - uses: actions/checkout@v4
+    
+    - name: Configure CMake
+      run: cmake -S . -B build -DCMAKE_BUILD_TYPE=${{ matrix.build_type }}
+    
+    - name: Build
+      run: cmake --build build --config ${{ matrix.build_type }}
+    
+    - name: Test Run
+      run: ./build/cpp_calc --test
+      if: runner.os != 'Windows'
+    
+    - name: Test Run (Windows)
+      run: .\build\${{ matrix.build_type }}\cpp_calc.exe --test
+      if: runner.os == 'Windows'
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 4f766df..5ede894 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -9,18 +9,12 @@ set(CMAKE_CXX_EXTENSIONS OFF)
 # Всегда экспортировать compile_commands.json
 set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
 
-# --- Копировать compile_commands.json в корень проекта ---
-add_custom_target(copy_compile_commands ALL
-    COMMAND ${CMAKE_COMMAND} -E copy_if_different
-            ${CMAKE_BINARY_DIR}/compile_commands.json
-            ${CMAKE_SOURCE_DIR}/compile_commands.json
-    DEPENDS ${CMAKE_BINARY_DIR}/compile_commands.json
-    COMMENT "Copying compile_commands.json to project root"
-)
-# ----------------------------------------------------------
-
 # Добавляем флаги компиляции
-add_compile_options(-Wall -Wextra -Wpedantic)
+if(MSVC)
+    add_compile_options(/W4)
+else()
+    add_compile_options(-Wall -Wextra -Wpedantic)
+endif()
 
 # Добавляем include-директории
 include_directories(${CMAKE_SOURCE_DIR}/libs)
@@ -31,3 +25,17 @@ file(GLOB_RECURSE SRC_FILES CONFIGURE_DEPENDS ${CMAKE_SOURCE_DIR}/src/*.cpp)
 # Создаём исполняемый файл
 add_executable(cpp_calc ${SRC_FILES})
 
+# --- Копировать compile_commands.json в корень проекта ---
+# Note: Visual Studio generators don't generate compile_commands.json
+# Only copy if the file exists (for Makefile/Ninja generators)
+if(NOT MSVC)
+    add_custom_command(TARGET cpp_calc POST_BUILD
+        COMMAND ${CMAKE_COMMAND} -E copy_if_different
+                ${CMAKE_BINARY_DIR}/compile_commands.json
+                ${CMAKE_SOURCE_DIR}/compile_commands.json
+        COMMENT "Copying compile_commands.json to project root"
+        VERBATIM
+    )
+endif()
+# ----------------------------------------------------------
+