diff --git a/choose_best_layout.py b/choose_best_layout.py
index 8ac4dc2..5af6dd6 100644
--- a/choose_best_layout.py
+++ b/choose_best_layout.py
@@ -13,10 +13,12 @@
 
 @dataclass
 class LayoutResult:
+    """Simple wrapper for a fanout and its app.py JSON output."""
     fanout: int
     data: Dict[str, Any]
 
 
+
 METRICS = [
     "treeHeight",
     "totalNodes",