a2a-source-edit: write agent.py

agent.py

@@ -312,6 +312,16 @@ def _score_higher_is_better(value: float, minimum: float, maximum: float) -> flo
     return ((value - minimum) / (maximum - minimum)) * 100.0
 
 
+def _comparison_sort_key(row: dict[str, Any]) -> tuple[Any, ...]:
+    return (
+        -row["weighted_score"],
+        row["total_price"],
+        row["delivery_days"],
+        -row["warranty_months"],
+        row["vendor"].casefold(),
+    )
+
+
 def _build_comparison(comparison_id: str, quotes: list[QuoteInput], weights: WeightInput) -> dict[str, Any]:
     prices = [q.unit_price for q in quotes]
     deliveries = [q.delivery_days for q in quotes]
@@ -338,7 +348,7 @@ def _build_comparison(comparison_id: str, quotes: list[QuoteInput], weights: Wei
                 "weighted_score": round(weighted_score, 4),
             }
         )
-    rows.sort(key=lambda item: (-item["weighted_score"], item["total_price"], item["delivery_days"], -item["warranty_months"], item["vendor"].casefold()))
+    rows.sort(key=_comparison_sort_key)
     winner = rows[0]
     return {
         "ok": True,