diff --git a/.github/workflows/compiler_sanitization.yml b/.github/workflows/compiler_sanitization.yml
new file mode 100644
index 00000000..128dbd83
--- /dev/null
+++ b/.github/workflows/compiler_sanitization.yml
@@ -0,0 +1,136 @@
+name: Compiler Sanitizer Tests
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+  workflow_dispatch:
+
+defaults:
+  run:
+    shell: bash
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
+permissions:
+  contents: read
+
+jobs:
+  clang_ASAN_UBSAN:
+    runs-on: macos-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          submodules: recursive
+          fetch-tags: true
+
+      - name: Install system dependencies
+        run: |
+          brew install mpfr fftw cmake
+
+      - name: Set up LLVM
+        run: |
+          brew install llvm@19
+          LLVM_PREFIX=$(brew --prefix llvm@19)
+          echo "CC=$LLVM_PREFIX/bin/clang" >> $GITHUB_ENV
+          echo "CXX=$LLVM_PREFIX/bin/clang++" >> $GITHUB_ENV
+          echo "LDFLAGS=-L$LLVM_PREFIX/lib" >> $GITHUB_ENV
+          echo "CPPFLAGS=-I$LLVM_PREFIX/include" >> $GITHUB_ENV
+
+      - name: Set up pyenv
+        run: |
+          git clone https://github.com/pyenv/pyenv.git "$HOME/.pyenv"
+          PYENV_ROOT="$HOME/.pyenv"
+          PYENV_BIN="$PYENV_ROOT/bin"
+          PYENV_SHIMS="$PYENV_ROOT/shims"
+          echo "$PYENV_BIN" >> $GITHUB_PATH
+          echo "$PYENV_SHIMS" >> $GITHUB_PATH
+          echo "PYENV_ROOT=$PYENV_ROOT" >> $GITHUB_ENV
+
+      - name: Check pyenv is working
+        run: pyenv --version
+
+      - name: Build CPython with address sanitizer
+        run: |
+          CONFIGURE_OPTS="--with-address-sanitizer" pyenv install 3.14t
+          pyenv global 3.14t
+
+      - name: Install Python build dependencies
+        run: |
+          pip install meson meson-python ninja cython pytest hypothesis wheel build patchelf pytest-timeout
+
+      - name: Clone and build NumPy with ASan
+        run: |
+          git clone --depth 1 https://github.com/numpy/numpy.git numpy-asan
+          cd numpy-asan
+          git submodule update --init --recursive
+          # Build NumPy with address sanitizer using pip
+          pip install . -v --no-build-isolation \
+            -Csetup-args=-Db_sanitize=address,undefined \
+            -Csetup-args=-Db_lundef=false
+
+      - name: Build and install quaddtype with ASan
+        working-directory: quaddtype
+        run: |
+          # Build with sanitizers - these flags propagate to subprojects (SLEEF, qblas) by default
+          pip install .[test] -v --no-build-isolation \
+            -Csetup-args=-Db_sanitize=address,undefined \
+            -Csetup-args=-Db_lundef=false
+
+      - name: Run quaddtype tests with ASan
+        working-directory: quaddtype
+        run: |
+          # Create a directory for sanitizer logs
+          mkdir -p ${{ github.workspace }}/sanitizer_logs
+          
+          # Run tests with sanitizer output redirected to log files
+          # Note: UBSAN halt_on_error=0 because NumPy has some UBSAN issues that would abort tests
+          ASAN_OPTIONS=detect_leaks=0:symbolize=1:strict_init_order=true:allocator_may_return_null=1:log_path=${{ github.workspace }}/sanitizer_logs/asan \
+          UBSAN_OPTIONS=halt_on_error=0:log_path=${{ github.workspace }}/sanitizer_logs/ubsan \
+          pytest -vvv --color=yes --timeout=600 --durations=10
+
+      - name: Display quaddtype sanitizer warnings
+        if: always()
+        run: |
+          echo ""
+          echo "=========================================="
+          echo "ASAN LOGS"
+          echo "=========================================="
+          if ls ${{ github.workspace }}/sanitizer_logs/asan* 1> /dev/null 2>&1; then
+            cat ${{ github.workspace }}/sanitizer_logs/asan* 2>/dev/null || echo "No ASAN logs available."
+          else
+            echo "No ASAN log files found."
+          fi
+          
+          echo ""
+          echo "=========================================="
+          echo "UBSAN LOGS"
+          echo "=========================================="
+          if ls ${{ github.workspace }}/sanitizer_logs/ubsan* 1> /dev/null 2>&1; then
+            cat ${{ github.workspace }}/sanitizer_logs/ubsan* 2>/dev/null || echo "No UBSAN logs available."
+          else
+            echo "No UBSAN log files found."
+          fi
+
+      - name: Check for quaddtype sanitizer issues
+        if: always()
+        run: |
+          # Fail if any quaddtype-related sanitizer issues are found
+          QUADDTYPE_ISSUES=""
+          if ls ${{ github.workspace }}/sanitizer_logs/* 1> /dev/null 2>&1; then
+            QUADDTYPE_ISSUES=$(cat ${{ github.workspace }}/sanitizer_logs/* 2>/dev/null | \
+              grep -E "quaddtype|_quaddtype|numpy_quaddtype" || true)
+          fi
+          
+          if [ -n "$QUADDTYPE_ISSUES" ]; then
+            echo "=========================================="
+            echo "ERROR: Sanitizer issues found in quaddtype!"
+            echo "=========================================="
+            echo "$QUADDTYPE_ISSUES"
+            exit 1
+          else
+            echo "No quaddtype-specific sanitizer issues found."
+          fi