diff --git a/.github/workflows/phpcs.yml b/.github/workflows/phpcs.yml
new file mode 100644
index 0000000..375053a
--- /dev/null
+++ b/.github/workflows/phpcs.yml
@@ -0,0 +1,36 @@
+name: PHPCS (Default)
+
+on: pull_request
+
+jobs:
+  phpcs:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: '8.2'
+          coverage: none
+          tools: composer, cs2pr
+
+      - name: Cache Composer
+        id: cache-composer
+        run: |
+          echo "dir=$(composer config cache-files-dir)" >> $GITHUB_OUTPUT
+      - uses: actions/cache@v3
+        with:
+          path: ${{ steps.cache-composer.outputs.dir }}
+          key: ${{ runner.os }}-composer-${{ hashFiles('**/composer.lock') }}
+          restore-keys: |
+            ${{ runner.os }}-composer-
+
+      - name: Install dependencies
+        run: |
+          composer config github-oauth.github.com ${{ secrets.AMIABOT_BOT_TOKEN }}
+          composer install --prefer-dist --no-progress
+
+      - name: Detect coding standard violations
+        run: vendor/bin/phpcs -q --report=checkstyle . | cs2pr --notices-as-warnings