diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 4f029f9d16..5073034141 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -35,14 +35,14 @@ jobs:
 
     steps:
       - name: Checkout sources
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Install dependencies
         shell: bash
         run: |
           if [[ "${RUNNER_OS}" == "Linux" ]]; then
             sudo apt-get update
-            sudo apt-get install -y mpich
+            sudo apt-get install -y libopenmpi-dev openmpi-bin
           else
             brew update
             brew install open-mpi
@@ -57,3 +57,138 @@ jobs:
       - name: Run check target
         run: cmake --build build --target check
 
+  code-checks:
+    name: Code Checks
+    runs-on: ubuntu-latest
+    needs: [require-label]
+    if: github.event_name != 'pull_request' || needs.require-label.result == 'success'
+    steps:
+      - name: Checkout sources
+        uses: actions/checkout@v4
+
+      - name: Install dependencies
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y libopenmpi-dev openmpi-bin astyle=3.1-3build1 autoconf automake libtool build-essential
+
+      - name: Check code formatting
+        working-directory: src
+        run: |
+          # Configure git to recognize the workspace
+          git config --global --add safe.directory ${{ github.workspace }}
+
+          # Run astyle-apply.sh to check and apply formatting
+          # This will modify files in place if formatting is needed
+          ./config/astyle-apply.sh .
+
+          # Check if any source files were modified (formatting changes)
+          if ! git diff --exit-code -- '*.c' '*.h' '*.hpp'; then
+            echo "::error::Code formatting check failed. Some source files need formatting."
+            echo "::error::Run './config/astyle-apply.sh .' from the src directory to fix formatting issues."
+            echo "::error::Then commit the formatted files."
+            echo "::error::Modified files:"
+            git diff --name-only -- '*.c' '*.h' '*.hpp'
+            exit 1
+          fi
+          echo "Code formatting check passed"
+
+      - name: Check mixed-precision code
+        working-directory: src
+        run: |
+          # Run mixed-precision check
+          echo "Running mixed-precision code check..."
+          ./mup_check
+          MUP_EXIT_CODE=$?
+
+          if [ $MUP_EXIT_CODE -ne 0 ]; then
+            echo "::error::Mixed-precision code check failed"
+            exit 1
+          fi
+          echo "Mixed-precision code check passed"
+          ./mup_clean
+
+      - name: Check license headers
+        working-directory: AUTOTEST
+        run: |
+          SRC_DIR="${{ github.workspace }}/src"
+          ./test.sh check-license.sh "$SRC_DIR/.."
+          if [ -s check-license.err ]; then
+            echo "::error::License header check failed"
+            cat check-license.err
+            exit 1
+          fi
+          echo "License header check passed"
+
+      - name: Check integer usage
+        working-directory: AUTOTEST
+        run: |
+          SRC_DIR="${{ github.workspace }}/src"
+          ./test.sh check-int.sh "$SRC_DIR"
+          if [ -s check-int.err ]; then
+            echo "::error::Integer usage check failed"
+            cat check-int.err
+            exit 1
+          fi
+          echo "Integer usage check passed"
+
+      - name: Check double usage
+        working-directory: AUTOTEST
+        run: |
+          SRC_DIR="${{ github.workspace }}/src"
+          ./test.sh check-double.sh "$SRC_DIR"
+          if [ -s check-double.err ]; then
+            echo "::error::Double usage check failed"
+            cat check-double.err
+            exit 1
+          fi
+          echo "Double usage check passed"
+
+      - name: Check MPI usage
+        working-directory: AUTOTEST
+        run: |
+          SRC_DIR="${{ github.workspace }}/src"
+          ./test.sh check-mpi.sh "$SRC_DIR"
+          if [ -s check-mpi.err ]; then
+            echo "::error::MPI usage check failed"
+            cat check-mpi.err
+            exit 1
+          fi
+          echo "MPI usage check passed"
+
+      - name: Check memory usage
+        working-directory: AUTOTEST
+        run: |
+          SRC_DIR="${{ github.workspace }}/src"
+          ./test.sh check-mem.sh "$SRC_DIR"
+          if [ -s check-mem.err ]; then
+            echo "::error::Memory usage check failed"
+            cat check-mem.err
+            exit 1
+          fi
+          echo "Memory usage check passed"
+
+      - name: Check headers
+        working-directory: AUTOTEST
+        env:
+          AR: "ar -rc"
+        run: |
+          SRC_DIR="${{ github.workspace }}/src"
+          ./test.sh check-headers.sh "$SRC_DIR"
+          if [ -s check-headers.err ]; then
+            echo "::error::Headers check failed"
+            cat check-headers.err
+            exit 1
+          fi
+          echo "Headers check passed"
+
+      - name: Check case-insensitive filenames
+        working-directory: AUTOTEST
+        run: |
+          SRC_DIR="${{ github.workspace }}/src"
+          ./test.sh check-case.sh "$SRC_DIR/.."
+          if [ -s check-case.err ]; then
+            echo "::error::Case-insensitive filename check failed"
+            cat check-case.err
+            exit 1
+          fi
+          echo "Case-insensitive filename check passed"