diff --git a/frontend/src/api/operational-metrics.ts b/frontend/src/api/operational-metrics.ts
index c427848..93aabad 100644
--- a/frontend/src/api/operational-metrics.ts
+++ b/frontend/src/api/operational-metrics.ts
@@ -39,7 +39,11 @@ export interface CoverageVelocity {
 }
 
 export interface ValidationThroughput {
-  tests_per_week: number;
+  tests_per_week: number;          // kept for API compat (now = conversion_rate value)
+  conversion_rate?: number;         // pipeline conversion % (activity-based)
+  validated?: number;
+  rejected?: number;
+  in_review?: number;
   trend: "improving" | "declining" | "stable";
 }