diff --git a/vanilla_roll/anatomy_orientation.py b/vanilla_roll/anatomy_orientation.py
index e158157..5b1d269 100644
--- a/vanilla_roll/anatomy_orientation.py
+++ b/vanilla_roll/anatomy_orientation.py
@@ -14,7 +14,7 @@ class Axial(Enum):
 
     @classmethod
     def of(cls, s: Literal["Superior"] | Literal["Inferior"]) -> Axial:
-        """construct from string.
+        """Construct from string.
 
         >>> Axial.of("Superior")
         <Axial.SUPERIOR: 'Superior'>
@@ -22,7 +22,7 @@ def of(cls, s: Literal["Superior"] | Literal["Inferior"]) -> Axial:
         return cls(s)
 
     def inverse(self) -> Axial:
-        """get inverse.
+        """Get inverse.
 
         >>> Axial.SUPERIOR.inverse()
         <Axial.INFERIOR: 'Inferior'>
@@ -36,7 +36,7 @@ class Sagittal(Enum):
 
     @classmethod
     def of(cls, s: Literal["Anterior"] | Literal["Posterior"]) -> Sagittal:
-        """construct from string.
+        """Construct from string.
 
         >>> Sagittal.of("Anterior")
         <Sagittal.ANTERIOR: 'Anterior'>
@@ -57,7 +57,7 @@ class Coronal(Enum):
 
     @classmethod
     def of(cls, s: Literal["Right"] | Literal["Left"]) -> Coronal:
-        """construct from string.
+        """Construct from string.
 
         >>> Coronal.of("Right")
         <Coronal.RIGHT: 'Right'>
diff --git a/vanilla_roll/geometry/conversion.py b/vanilla_roll/geometry/conversion.py
index bcc4ce6..e59cfc2 100644
--- a/vanilla_roll/geometry/conversion.py
+++ b/vanilla_roll/geometry/conversion.py
@@ -12,25 +12,20 @@
 
 class Conversion(Protocol):
     @overload
-    def __call__(self, target: Vector) -> Vector:
-        ...
+    def __call__(self, target: Vector) -> Vector: ...
 
     @overload
-    def __call__(self, target: Orientation) -> Orientation:
-        ...
+    def __call__(self, target: Orientation) -> Orientation: ...
 
     @overload
-    def __call__(self, target: Frame) -> Frame:
-        ...
+    def __call__(self, target: Frame) -> Frame: ...
 
     @overload
-    def __call__(self, target: xp.Array) -> xp.Array:
-        ...
+    def __call__(self, target: xp.Array) -> xp.Array: ...
 
     def __call__(
         self, target: Vector | Orientation | Frame | xp.Array
-    ) -> Vector | Orientation | Frame | xp.Array:
-        ...
+    ) -> Vector | Orientation | Frame | xp.Array: ...
 
 
 def _transform_vector(
@@ -115,20 +110,16 @@ def __init__(self, src: Frame, dst: Frame) -> None:
         self._dst_frame_mat = as_array(dst)
 
     @overload
-    def __call__(self, target: Vector) -> Vector:
-        ...
+    def __call__(self, target: Vector) -> Vector: ...
 
     @overload
-    def __call__(self, target: Orientation) -> Orientation:
-        ...
+    def __call__(self, target: Orientation) -> Orientation: ...
 
     @overload
-    def __call__(self, target: Frame) -> Frame:
-        ...
+    def __call__(self, target: Frame) -> Frame: ...
 
     @overload
-    def __call__(self, target: xp.Array) -> xp.Array:
-        ...
+    def __call__(self, target: xp.Array) -> xp.Array: ...
 
     def __call__(self, target: Vector | Orientation | Frame | xp.Array):
         match target:
@@ -203,20 +194,16 @@ def __init__(self, order: tuple[int, int, int]) -> None:
         self._order = order
 
     @overload
-    def __call__(self, target: Vector) -> Vector:
-        ...
+    def __call__(self, target: Vector) -> Vector: ...
 
     @overload
-    def __call__(self, target: Orientation) -> Orientation:
-        ...
+    def __call__(self, target: Orientation) -> Orientation: ...
 
     @overload
-    def __call__(self, target: Frame) -> Frame:
-        ...
+    def __call__(self, target: Frame) -> Frame: ...
 
     @overload
-    def __call__(self, target: xp.Array) -> xp.Array:
-        ...
+    def __call__(self, target: xp.Array) -> xp.Array: ...
 
     def __call__(self, target: Vector | Orientation | Frame | xp.Array):
         match target:
diff --git a/vanilla_roll/rendering/composition.py b/vanilla_roll/rendering/composition.py
index 9758e4c..92b2dc1 100644
--- a/vanilla_roll/rendering/composition.py
+++ b/vanilla_roll/rendering/composition.py
@@ -22,11 +22,9 @@ def add(
         *,
         mask: xp.Array | None = None,
         slice: Slice2d | None = None,
-    ) -> None:
-        ...
+    ) -> None: ...
 
-    def compose(self) -> Image:
-        ...
+    def compose(self) -> Image: ...
 
 
 class AccMax(Composer):
diff --git a/vanilla_roll/rendering/types.py b/vanilla_roll/rendering/types.py
index 7838e6b..69707cf 100644
--- a/vanilla_roll/rendering/types.py
+++ b/vanilla_roll/rendering/types.py
@@ -34,5 +34,4 @@ def __call__(
         self,
         camera: Camera,
         spacing: float | None = ...,
-    ) -> RenderingResult:
-        ...
+    ) -> RenderingResult: ...
diff --git a/vanilla_roll/validation.py b/vanilla_roll/validation.py
index 6ae8e3b..e2d32b8 100644
--- a/vanilla_roll/validation.py
+++ b/vanilla_roll/validation.py
@@ -5,8 +5,7 @@
 class ValidationRule(Protocol):
     """ValidationRule is a protocol that defines a validation rule."""
 
-    def __call__(self, name: str, other: Any) -> ValueError | None:
-        ...
+    def __call__(self, name: str, other: Any) -> ValueError | None: ...
 
 
 class IsGreaterThan: