diff --git a/packages/sdk-typescript/src/daemon/ui/normalizer.ts b/packages/sdk-typescript/src/daemon/ui/normalizer.ts
index fa946bd624..5706944784 100644
--- a/packages/sdk-typescript/src/daemon/ui/normalizer.ts
+++ b/packages/sdk-typescript/src/daemon/ui/normalizer.ts
@@ -839,6 +839,7 @@ function normalizeSessionUpdate(
     case 'plan':
       return [normalizePlanUpdate(update, base)];
     case 'current_mode_update':
+    case 'usage_update':
       return [];
     default:
       return [
diff --git a/packages/sdk-typescript/test/unit/daemonUi.test.ts b/packages/sdk-typescript/test/unit/daemonUi.test.ts
index f2f7edef87..19f9ee9444 100644
--- a/packages/sdk-typescript/test/unit/daemonUi.test.ts
+++ b/packages/sdk-typescript/test/unit/daemonUi.test.ts
@@ -2509,6 +2509,19 @@ describe('daemon UI normalizer — Wave 3/4 event coverage (PR-A)', () => {
     ]);
   });
 
+  it('does not surface usage_update as a debug transcript event', () => {
+    const events = normalizeDaemonEvent(
+      envelopeOf('session_update', {
+        update: {
+          sessionUpdate: 'usage_update',
+          used: 46_351,
+          size: 1_000_000,
+        },
+      }),
+    );
+    expect(events).toEqual([]);
+  });
+
   it('normalizes memory_changed with closed-enum scope + mode', () => {
     const events = normalizeDaemonEvent(
       envelopeOf('memory_changed', {