diff --git a/backend/events/events.go b/backend/events/events.go
index 4306b65..8625a6e 100644
--- a/backend/events/events.go
+++ b/backend/events/events.go
@@ -71,4 +71,5 @@ const (
 // Tag writing events.
 const (
 	TrackMetadataChanged = "TrackMetadataChanged"
+	BatchWriteProgress   = "BatchWriteProgress"
 )
diff --git a/frontend/src/events.ts b/frontend/src/events.ts
index 5e87289..271449a 100644
--- a/frontend/src/events.ts
+++ b/frontend/src/events.ts
@@ -50,6 +50,7 @@ export const Events = {
 
     // Tag writing events
     TrackMetadataChanged: "TrackMetadataChanged",
+    BatchWriteProgress: "BatchWriteProgress",
 } as const;
 
 export type EventName = (typeof Events)[keyof typeof Events];