diff --git a/services/platform-service/src/lib/cosmos-init.ts b/services/platform-service/src/lib/cosmos-init.ts
index 5024469f..39b5031f 100644
--- a/services/platform-service/src/lib/cosmos-init.ts
+++ b/services/platform-service/src/lib/cosmos-init.ts
@@ -67,6 +67,11 @@ const CONTAINER_DEFS: Record<string, ContainerConfig> = {
   // P2 — Product Intelligence
   experiments: { partitionKeyPath: '/id' },
   experiment_assignments: { partitionKeyPath: '/experimentId' },
+  // A/B Testing — Extended containers for Intelligent A/B Testing
+  ab_testing_variants: { partitionKeyPath: '/experimentId' },
+  ab_testing_events: { partitionKeyPath: '/experimentId', defaultTtl: 90 * 86400 },
+  ab_testing_metrics: { partitionKeyPath: '/experimentId' },
+  experiment_suggestions: { partitionKeyPath: '/productId', defaultTtl: 180 * 86400 },
   analytics_rollups: { partitionKeyPath: '/productId' },
   feedback: { partitionKeyPath: '/productId' },
   impersonation_sessions: { partitionKeyPath: '/productId', defaultTtl: 90 * 86400 },