diff --git a/.forgejo/workflows/pr_check.yaml b/.forgejo/workflows/pr_check.yaml
index 3489167..2df7053 100644
--- a/.forgejo/workflows/pr_check.yaml
+++ b/.forgejo/workflows/pr_check.yaml
@@ -46,3 +46,86 @@ jobs:
           echo "github.workspace content"
           ls -la ${{ github.workspace }}
           echo "This job's status is ${{ job.status }}."
+
+      #- name: Delete cache
+      #  run: |
+      #    rm -rf ${{ runner.tool_cache }}/cache-llvm-19-restore
+
+      - name: Try restore LLVM-19 binaries from cache
+        id: cache-llvm-19-bins-restore
+        uses: actions/cache@v4
+        with:
+          path: /LLVM-19.1.0-Linux-X64-small.tar.xz
+          key: LLVM-19.1.0-Linux-X64-small
+
+      - name: Download and unzip LLVM-19 if not in cache
+        if: steps.cache-llvm-19-bins-restore.outputs.cache-hit != 'true'
+        run: |
+          echo "::group::Download LLVM-19.1.0"
+          wget https://github.com/llvm/llvm-project/releases/download/llvmorg-19.1.0/LLVM-19.1.0-Linux-X64.tar.xz -O /LLVM-19.1.0-Linux-X64.tar.xz
+          echo "::endgroup::"
+
+          echo "::group::Extracting LLVM-19.1.0"
+          mkdir -p /home/LLVM-19.1.0/
+          tar -xf /LLVM-19.1.0-Linux-X64.tar.xz -C "/home/LLVM-19.1.0/" --strip-components=1 LLVM-19.1.0-Linux-X64/bin/clang-19 LLVM-19.1.0-Linux-X64/bin/clang LLVM-19.1.0-Linux-X64/bin/clang++ LLVM-19.1.0-Linux-X64/bin/clang-scan-deps LLVM-19.1.0-Linux-X64/bin/clang-format LLVM-19.1.0-Linux-X64/bin/clang-tidy  LLVM-19.1.0-Linux-X64/include/ LLVM-19.1.0-Linux-X64/lib/ LLVM-19.1.0-Linux-X64/libexec/ LLVM-19.1.0-Linux-X64/local/ LLVM-19.1.0-Linux-X64/share/
+          rm /LLVM-19.1.0-Linux-X64.tar.xz
+          echo "::endgroup::"
+
+          tar -cf /LLVM-19.1.0-Linux-X64-small.tar.xz /home/LLVM-19.1.0/
+      
+      - name: Save LLVM-19 to cache
+        if: steps.cache-llvm-19-bins-restore.outputs.cache-hit != 'true'
+        id: cache-llvm-19-save
+        uses: actions/cache/save@v4
+        with:
+          path: /LLVM-19.1.0-Linux-X64-small.tar.xz
+          key: LLVM-19.1.0-Linux-X64-small
+
+      - name: Install LLVM
+        run: |
+          mkdir -p /home/LLVM-19.1.0
+          tar -xf /LLVM-19.1.0-Linux-X64-small.tar.xz -C "/home/LLVM-19.1.0/" --strip-components=2
+          ls -la /home/LLVM-19.1.0/bin/
+          export PATH="/home/LLVM-19.1.0/bin:${PATH}"
+
+      - name: Clang build with -fsanitize=address
+        environment:
+          CC: /home/LLVM-19.1.0/bin/clang
+          CXX: /home/LLVM-19.1.0/bin/clang++
+        run: |
+          mkdir -p ${{ github.workspace }}/build_clang
+          cmake -Wno-dev                                       \
+            -DCMAKE_C_COMPILER=/home/LLVM-19.1.0/bin/clang     \
+            -DCMAKE_CXX_COMPILER=/home/LLVM-19.1.0/bin/clang++ \
+            -S ${{ github.workspace }}             \
+            -B ${{ github.workspace }}/build_clang \
+            -GNinja -DCMAKE_BUILD_TYPE=Release     \
+            -DENABLE_EXAMPLES=ON                   \
+            -DENABLE_TESTS=ON                      \
+            -DCMAKE_CXX_FLAGS="-stdlib=libstdc++ -fno-omit-frame-pointer -g -fsanitize=address,undefined,leak,function,nullability,vptr" \
+            -DCMAKE_EXE_LINKER_FLAGS="-L/usr/lib/x86_64-linux-gnu -lstdc++ -fno-omit-frame-pointer -g -fsanitize=address,undefined,leak,function,nullability,vptr"
+          cmake --build ${{ github.workspace }}/build_clang --parallel `nproc`
+
+      - name: Clang unit tests with -fsanitize=address
+        run: |
+          cd ${{ github.workspace }}/build_clang
+          ASAN_SYMBOLIZER_PATH=/home/LLVM-19.1.0/bin/llvm-symbolizer ASAN_OPTIONS=detect_stack_use_after_return=1:check_initialization_order=1:detect_leaks=1:atexit=1:abort_on_error=1 ./larra_xmpp_tests
+
+      - name: GCC build
+        environment:
+          CC: /usr/sbin/gcc
+          CXX: /usr/sbin/g++
+        run: |
+          mkdir -p ${{ github.workspace }}/build_gcc
+          cmake -Wno-dev \
+            -S ${{ github.workspace }}           \
+            -B ${{ github.workspace }}/build_gcc \
+            -GNinja -DCMAKE_BUILD_TYPE=Release   \
+            -DENABLE_EXAMPLES=ON                 \
+            -DENABLE_TESTS=ON
+          cmake --build ${{ github.workspace }}/build_gcc --parallel `nproc`
+
+      - name: GCC unit tests
+        run: |
+          cd ${{ github.workspace }}/build_gcc
+          ./larra_xmpp_tests