diff --git a/.github/workflows/code-standards.yml b/.github/workflows/code-standards.yml
index 8344149..6ebe564 100644
--- a/.github/workflows/code-standards.yml
+++ b/.github/workflows/code-standards.yml
@@ -34,6 +34,9 @@ on:
       add-rules:
         type: string
         default: "{}"
+      exclude-patterns:
+        type: string
+        default: ""
 
 permissions:
   contents: read
@@ -42,23 +45,35 @@ jobs:
     php_code_standards:
       runs-on: ubuntu-latest
       name: PHP Code Standards
+      env:
+        CONFIG: ${{ inputs.config }}
+        CONFIG_PATH: ${{ inputs.path }}
       steps:
       - uses: actions/checkout@v4
       - name: Setup PHP
         uses: shivammathur/setup-php@v2
         with:
           php-version: '8.2'
+      - if: ${{ startsWith(inputs.config, 'GoogleCloudPlatform/php-tools/') }}
+        name: Install Google Cloud Tools
+        run: |
+          BRANCH=${CONFIG#GoogleCloudPlatform/php-tools/}
+          composer global require google/cloud-tools:dev-${BRANCH#*@} -q
+          echo "CONFIG=$HOME/.composer/vendor/google/cloud-tools/${BRANCH%@*}" >> $GITHUB_ENV
       - name: 'Setup jq'
         uses: dcarbone/install-jq-action@v2
       - name: Run PHP CS Fixer
         run: |
-          composer global require friendsofphp/php-cs-fixer:${{ inputs.version }} -q
-          CONFIG="${{ inputs.config }}"
-          RULES=$(echo $'${{ inputs.rules }} ${{ inputs.add-rules }}'|tr -d '\n\t\r '|jq -s '.[0] * .[1]' -crM)
+          composer global require friendsofphp/php-cs-fixer:${{ inputs.version }}
+          export RULES=$(echo $'${{ inputs.rules }} ${{ inputs.add-rules }}'|tr -d '\n\t\r '|jq -s '.[0] * .[1]' -crM)
+          export EXCLUDE_PATTERNS=$(echo $'${{ inputs.exclude-patterns }}'|tr -d '\n\t\r ')
+          CMD_PATH=$([ "$EXCLUDE_PATTERNS" == "" ] && echo "$CONFIG_PATH")
+          CONFIG_OR_RULES=$([ ! -z "$CONFIG" ] && echo "--config=$CONFIG" || echo --rules=$RULES)
 
+          echo "TEST"
           set -x
 
           ~/.composer/vendor/bin/php-cs-fixer fix \
-            ${{ inputs.path }} \
-            $(if [ ! -z "$CONFIG" ]; then echo "--config=$CONFIG"; else echo --rules=$RULES; fi) \
+            $CMD_PATH \
+            $CONFIG_OR_RULES \
             --dry-run --diff
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 653999d..032f87f 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -36,6 +36,13 @@ jobs:
         with:
             path: src
 
+    code-standards-with-config:
+        uses: ./.github/workflows/code-standards.yml
+        with:
+            path: .
+            config: .php-cs-fixer.default.php
+            exclude-patterns: '["vendor", "test", "examples", "scripts"]'
+
     static-analysis:
         uses: ./.github/workflows/static-analysis.yml
 
diff --git a/.php-cs-fixer.default.php b/.php-cs-fixer.default.php
index a78af4a..b8321bf 100644
--- a/.php-cs-fixer.default.php
+++ b/.php-cs-fixer.default.php
@@ -1,16 +1,19 @@
 <?php
 
-require __DIR__ . '/vendor/autoload.php';
-
 use Symfony\Component\Yaml\Yaml;
 
-$workflow = Yaml::parse(file_get_contents(__DIR__ . '/.github/workflows/code-standards.yml'));
-$rules = json_decode($workflow['on']['workflow_call']['inputs']['rules']['default'], true);
+if (!$rulesJson = getenv('RULES')) {
+    $workflow = Yaml::parse(file_get_contents(__DIR__ . '/.github/workflows/code-standards.yml'));
+    $rulesJson = $workflow['on']['workflow_call']['inputs']['rules']['default'];
+}
+
+$excludePatterns = json_decode(getenv('EXCLUDE_PATTERNS') ?: '[]', true);
 
 return (new PhpCsFixer\Config())
-    ->setRules($rules)
+    ->setRules(json_decode($rulesJson, true))
     ->setFinder(
         PhpCsFixer\Finder::create()
-            ->in(__DIR__)
+            ->in(getenv('CONFIG_PATH') ?: __DIR__)
+            ->notPath($excludePatterns)
     )
 ;