diff --git a/.github/workflows/reusable_extension_ci.yml b/.github/workflows/reusable_extension_ci.yml
new file mode 100644
index 0000000..d8f47f1
--- /dev/null
+++ b/.github/workflows/reusable_extension_ci.yml
@@ -0,0 +1,86 @@
+on:
+  workflow_call:
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        pg-version: ["14", "15", "16", "17", "18", "19"]
+
+    steps:
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+
+      - name: Install Nix
+        uses: cachix/install-nix-action@c134e4c9e34bac6cab09cf239815f9339aaaf84e # v31.5.1
+
+      - name: Use Cachix Cache
+        uses: cachix/cachix-action@3ba601ff5bbb07c7220846facfa2cd81eeee15a1 # v16
+        with:
+          name: nxpg
+          authToken: ${{ secrets.CACHIX_AUTH_TOKEN }}
+
+      - name: Build
+        run: nix-shell --argstr pgVersion "${{ matrix.pg-version }}" --arg cassert false --run "xpg -v ${{ matrix.pg-version }} build"
+
+      - name: Run tests
+        run: nix-shell --argstr pgVersion "${{ matrix.pg-version }}" --arg cassert false --run "xpg -v ${{ matrix.pg-version }} test"
+
+
+  test-on-macos:
+    runs-on: macos-26
+    strategy:
+      matrix:
+        pg-version: ["17"]
+    steps:
+      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.3.1
+
+      - name: Install Nix
+        uses: cachix/install-nix-action@c134e4c9e34bac6cab09cf239815f9339aaaf84e # v31.5.1
+        with:
+          nix_path: nixpkgs=channel:nixos-unstable # needed to solve a bash error on CI
+
+      - name: Use Cachix Cache
+        uses: cachix/cachix-action@3ba601ff5bbb07c7220846facfa2cd81eeee15a1 # v16
+        with:
+          name: nxpg
+          authToken: ${{ secrets.CACHIX_AUTH_TOKEN }}
+
+      - name: clang analyze
+        run: |
+          nix-shell --argstr pgVersion "${{ matrix.pg-version }}" --arg cassert false --run "CPPFLAGS='--analyze -Xanalyzer  -analyzer-werror' xpg -v ${{ matrix.pg-version }} build"
+          rm -rf ./build-${{ matrix.pg-version }}
+
+      - name: Build
+        run: nix-shell --argstr pgVersion "${{ matrix.pg-version }}" --arg cassert false --run "xpg -v ${{ matrix.pg-version }} build"
+
+      - name: Run tests
+        run: nix-shell --argstr pgVersion "${{ matrix.pg-version }}" --arg cassert false --run "xpg -v ${{ matrix.pg-version }} test"
+
+  coverage:
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        pg-version: ["17"]
+
+    steps:
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+
+      - name: Install Nix
+        uses: cachix/install-nix-action@c134e4c9e34bac6cab09cf239815f9339aaaf84e # v31.5.1
+
+      - name: Use Cachix Cache
+        uses: cachix/cachix-action@3ba601ff5bbb07c7220846facfa2cd81eeee15a1 # v16
+        with:
+          name: nxpg
+          authToken: ${{ secrets.CACHIX_AUTH_TOKEN }}
+
+      - name: Coverage
+        run: nix-shell --argstr pgVersion "${{ matrix.pg-version }}" --arg cassert false --run "xpg -v ${{ matrix.pg-version }} coverage"
+
+      - name: Send coverage to Coveralls
+        uses: coverallsapp/github-action@648a8eb78e6d50909eff900e4ec85cab4524a45b # v2.3.6
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+          files: ./build-${{ matrix.pg-version }}/coverage.info