diff --git a/backend/engine/cdsl_engine/build123d_adapter.py b/backend/engine/cdsl_engine/build123d_adapter.py
index 109d5c1c..2db70042 100644
--- a/backend/engine/cdsl_engine/build123d_adapter.py
+++ b/backend/engine/cdsl_engine/build123d_adapter.py
@@ -46,7 +46,6 @@ def _arc_midpoint(edge: dict[str, Any], start: Vector, end: Vector, center: Vect
     radius_vector = first.normalized() * radius
     return center + radius_vector * math.cos(half) + normal.cross(radius_vector) * math.sin(half)
 
-
 class Build123dGeometryAdapter:
     """All B-rep construction and mutation lives in this adapter."""