diff --git a/build/lib/module_utils/config_utils.py b/build/lib/module_utils/config_utils.py
index b54f48ec..42ed7da9 100644
--- a/build/lib/module_utils/config_utils.py
+++ b/build/lib/module_utils/config_utils.py
@@ -8,7 +8,8 @@ from ansible.errors import AnsibleUndefinedVariable
 try:
     from ansible.utils.unsafe_proxy import AnsibleUndefined
 except ImportError:
-    class AnsibleUndefined: pass
+    class AnsibleUndefined:
+        pass
 
 class AppConfigKeyError(AnsibleFilterError, ValueError):
     """
diff --git a/main.py b/main.py
index 31bfa8e2..71a4fad0 100755
--- a/main.py
+++ b/main.py
@@ -243,7 +243,8 @@ def _call_sound(method_name: str):
 
 def _play_in_child(method_name: str) -> bool:
     p = Process(target=_call_sound, args=(method_name,))
-    p.start(); p.join()
+    p.start()
+    p.join()
     if p.exitcode != 0:
         try:
             # Sichtbare Diagnose, wenn das Kind crasht/fehlschlägt
diff --git a/module_utils/config_utils.py b/module_utils/config_utils.py
index b54f48ec..42ed7da9 100644
--- a/module_utils/config_utils.py
+++ b/module_utils/config_utils.py
@@ -8,7 +8,8 @@ from ansible.errors import AnsibleUndefinedVariable
 try:
     from ansible.utils.unsafe_proxy import AnsibleUndefined
 except ImportError:
-    class AnsibleUndefined: pass
+    class AnsibleUndefined:
+        pass
 
 class AppConfigKeyError(AnsibleFilterError, ValueError):
     """
diff --git a/pyproject.toml b/pyproject.toml
index 05749755..e464c39c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -46,3 +46,12 @@ packages = { find = { where = ["."], include = [
   "__pycache__*",
 ] } }
 include-package-data = true
+
+[tool.ruff]
+exclude = [
+  "build",
+  "dist",
+  "*.egg-info",
+  ".venv",
+  "venv",
+]
\ No newline at end of file
diff --git a/roles/sys-svc-cdn/filter_plugins/cdn_dirs.py b/roles/sys-svc-cdn/filter_plugins/cdn_dirs.py
index d2490dd6..4c849375 100644
--- a/roles/sys-svc-cdn/filter_plugins/cdn_dirs.py
+++ b/roles/sys-svc-cdn/filter_plugins/cdn_dirs.py
@@ -4,9 +4,11 @@ def cdn_dirs(tree):
     out = set()
     def walk(v):
         if isinstance(v, dict):
-            for x in v.values(): walk(x)
+            for x in v.values():
+                walk(x)
         elif isinstance(v, list):
-            for x in v: walk(x)
+            for x in v:
+                walk(x)
         elif isinstance(v, str) and os.path.isabs(v):
             out.add(v)
     walk(tree)