diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
new file mode 100644
index 0000000000..28958cb188
--- /dev/null
+++ b/.github/workflows/main.yml
@@ -0,0 +1,198 @@
+name: "CI"
+
+on: [push]
+jobs:
+  Ubuntu:
+    runs-on: ubuntu-latest
+    outputs:
+      cache_misses: ${{ env.cache_misses }}
+    steps:
+      - uses: actions/checkout@v4
+      - name: Install required packages
+        run: |
+          sudo apt-get update
+          sudo apt-get -y install apt-utils
+          sudo apt-get -y install git gcc g++ cmake python3 make ninja-build
+          sudo apt-get -y install tcpdump libgsl-dev libxml2-dev
+          sudo apt-get -y install curl unzip tar
+          sudo apt-get -y install ccache
+      - name: Get timestamp
+        id: time
+        run: python3 -c "from datetime import datetime; print('time='+datetime.now().strftime('%Y-%m-%d-%H-%M-%S'))" >> $GITHUB_ENV
+      - name: Restore ccache
+        id: ccache
+        uses: actions/cache@v4
+        with:
+          path: .ccache
+          key: ubuntu-ci-${{env.time}}
+          restore-keys: ubuntu-ci-
+      - name: Setup ccache
+        run: |
+          ccache --set-config=cache_dir="$GITHUB_WORKSPACE/.ccache"
+          ccache --set-config=max_size=400M
+          ccache --set-config=compression=true
+          ccache -z
+      - name: Configure CMake
+        run: |
+          ./ns3 configure -d release --enable-asserts --enable-examples --enable-tests --disable-werror -G"Ninja"
+      - name: Build ns-3
+        run: |
+          ./ns3 build
+      - name: Print ccache statistics
+        id: ccache_results
+        run: |
+          ccache -s
+          python3 -c "import re, subprocess;print('cache_misses=%d' % int(re.findall('cache_miss(.*)', subprocess.check_output(['ccache', '--print-stats']).decode())[0]))" >> $GITHUB_ENV
+      - name: Run tests and examples
+        if: env.cache_misses != '0'
+        run: python3 test.py --no-build
+
+  Codecov:
+    runs-on: ubuntu-latest
+    needs: Ubuntu
+    if: needs.Ubuntu.outputs.cache_misses != '0'
+    steps:
+      - uses: actions/checkout@v4
+      - name: Install required packages
+        run: |
+          sudo apt-get update
+          sudo apt-get -y install apt-utils
+          sudo apt-get -y install git gcc g++ cmake python3 make ninja-build
+          sudo apt-get -y install tcpdump libgsl-dev libxml2-dev
+          sudo apt-get -y install curl unzip tar
+          sudo apt-get -y install ccache
+          sudo apt-get -y install lcov
+      - name: Get timestamp
+        id: time
+        run: python3 -c "from datetime import datetime; print('time='+datetime.now().strftime('%Y-%m-%d-%H-%M-%S'))" >> $GITHUB_ENV
+      - name: Restore ccache
+        id: ccache
+        uses: actions/cache@v4
+        with:
+          path: .ccache
+          key: ubuntu-coverage-${{env.time}}
+          restore-keys: ubuntu-coverage-
+      - name: Setup ccache
+        run: |
+          ccache --set-config=cache_dir="$GITHUB_WORKSPACE/.ccache"
+          ccache --set-config=max_size=400M
+          ccache --set-config=compression=true
+          ccache -z
+      - name: Configure CMake
+        run: |
+          ./ns3 configure --enable-asserts --enable-examples --enable-tests --disable-werror --enable-gcov -G"Ninja"
+      - name: Build ns-3
+        run: |
+          ./ns3 build
+      - name: Print ccache statistics
+        id: ccache_results
+        run: |
+          ccache -s
+          python3 -c "import re, subprocess;print('cache_misses=%d' % int(re.findall('cache_miss(.*)', subprocess.check_output(['ccache', '--print-stats']).decode())[0]))" >> $GITHUB_ENV
+      - name: Generate coverage data and submit to codecov.io
+        if: env.cache_misses != '0'
+        run: |
+          ./ns3 build coverage_gcc
+          cd ./build/coverage
+          bash <(curl -s https://codecov.io/bash) -f ns3.info || echo "Codecov did not collect coverage reports"
+        env:
+          CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
+  Windows_MinGW:
+    runs-on: windows-latest
+    defaults:
+      run:
+        shell: msys2 {0}
+    steps:
+      - uses: actions/checkout@v4
+      - uses: msys2/setup-msys2@v2
+      - name: Install required msys2/mingw64 packages
+        run: |
+          pacman -S --noconfirm \
+          unzip \
+          tar \
+          mingw-w64-x86_64-curl \
+          mingw-w64-x86_64-binutils \
+          mingw-w64-x86_64-cmake \
+          mingw-w64-x86_64-gcc \
+          mingw-w64-x86_64-ninja \
+          mingw-w64-x86_64-python \
+          mingw-w64-x86_64-ccache \
+          mingw-w64-x86_64-gsl \
+          mingw-w64-x86_64-libxml2 \
+          mingw-w64-x86_64-lld \
+          mingw-w64-x86_64-sed
+          pacman --noconfirm -Scc
+      - name: Get timestamp
+        id: time
+        run: python3 -c "from datetime import datetime; print('time='+datetime.now().strftime('%Y-%m-%d-%H-%M-%S'))" >> $GITHUB_ENV
+      - name: Restore ccache
+        id: ccache
+        uses: actions/cache@v4
+        with:
+          path: .ccache
+          key: msys2-${{env.time}}
+          restore-keys: msys2-
+      - name: Setup ccache
+        run: |
+          ccache --set-config=cache_dir="$GITHUB_WORKSPACE/.ccache"
+          ccache --set-config=max_size=400M
+          ccache --set-config=compression=true
+          ccache -z
+      - name: Configure CMake
+        run: |
+          python3 ns3 configure -d release --enable-asserts --enable-examples --enable-tests --disable-werror -G"Ninja"
+      - name: Build ns-3
+        run: |
+          python3 ns3 build
+      - name: Print ccache statistics
+        id: ccache_results
+        run: |
+          ccache -s
+          python3 -c "import re, subprocess;print('cache_misses=%d' % int(re.findall('cache_miss(.*)', subprocess.check_output(['ccache', '--print-stats']).decode())[0]))" >> $GITHUB_ENV
+      - name: Run tests and examples
+        if: env.cache_misses != '0'
+        run: python3 test.py --no-build
+
+  Mac_OS_X:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ macos-latest, macos-13 ]
+    steps:
+      - uses: actions/checkout@v4
+      - name: Install required packages
+        run: |
+          brew install ninja cmake ccache libxml2 gsl open-mpi #qt5
+      - name: Get timestamp
+        id: time
+        run: python3 -c "from datetime import datetime; print('time='+datetime.now().strftime('%Y-%m-%d-%H-%M-%S'))" >> $GITHUB_ENV
+      - name: Restore ccache
+        id: ccache
+        uses: actions/cache@v4
+        with:
+          path: .ccache
+          key: osx_brew-ci-${{env.time}}
+          restore-keys: osx_brew-ci-
+      - name: Setup ccache
+        run: |
+          export PATH=/usr/local/bin:$PATH #:/usr/local/opt/qt/bin
+          ccache --set-config=cache_dir="$GITHUB_WORKSPACE/.ccache"
+          ccache --set-config=max_size=400M
+          ccache --set-config=compression=true
+          ccache -z
+      - name: Configure CMake
+        run: |
+          export PATH=/usr/local/bin:$PATH #:/usr/local/opt/qt/bin
+          ./ns3 configure -d release --enable-asserts --enable-examples --enable-tests --disable-werror -G"Ninja"
+      - name: Build ns-3
+        run: |
+          export PATH="$PATH" #:/usr/local/opt/qt/bin
+          ./ns3 build
+      - name: Print ccache statistics
+        id: ccache_results
+        run: |
+          ccache -s
+          python3 -c "import re, subprocess;print('cache_misses=%d' % int(re.findall('cache_miss(.*)', subprocess.check_output(['ccache', '--print-stats']).decode())[0]))" >> $GITHUB_ENV
+      - name: Run tests and examples
+        if: env.cache_misses != '0'
+        run: ./test.py --no-build