diff --git a/frontend/sync-client/src/services/types/DocumentUpdateResponse.ts b/frontend/sync-client/src/services/types/DocumentUpdateResponse.ts
index 572e2d9d..85dc56ab 100644
--- a/frontend/sync-client/src/services/types/DocumentUpdateResponse.ts
+++ b/frontend/sync-client/src/services/types/DocumentUpdateResponse.ts
@@ -1,8 +1,7 @@
 // This file was generated by [ts-rs](https://github.com/Aleph-Alpha/ts-rs). Do not edit this file manually.
-import type { DocumentVersion } from "./DocumentVersion";
 import type { DocumentVersionWithoutContent } from "./DocumentVersionWithoutContent";
 
 /**
  * Response to an update document request.
  */
-export type DocumentUpdateResponse = { "type": "Accepted" } & DocumentVersionWithoutContent | { "type": "StaleBase" } & DocumentVersion;
+export type DocumentUpdateResponse = { "type": "Accepted" } & DocumentVersionWithoutContent | { "type": "StaleBase" } & DocumentVersionWithoutContent;
diff --git a/frontend/sync-client/src/services/types/EventBatch.ts b/frontend/sync-client/src/services/types/EventBatch.ts
index f17f17ed..a3bfb573 100644
--- a/frontend/sync-client/src/services/types/EventBatch.ts
+++ b/frontend/sync-client/src/services/types/EventBatch.ts
@@ -1,4 +1,8 @@
 // This file was generated by [ts-rs](https://github.com/Aleph-Alpha/ts-rs). Do not edit this file manually.
 import type { EventRecord } from "./EventRecord";
 
-export type EventBatch = { headEventId: number, events: Array<EventRecord>, };
+export type EventBatch = { headEventId: number, 
+/**
+ * Last event in this page; `head_event_id` is the vault's current head.
+ */
+endEventId?: number, events: Array<EventRecord>, };
diff --git a/frontend/sync-client/src/services/types/WebSocketHandshake.ts b/frontend/sync-client/src/services/types/WebSocketHandshake.ts
index 85c2cf0d..310c0bb8 100644
--- a/frontend/sync-client/src/services/types/WebSocketHandshake.ts
+++ b/frontend/sync-client/src/services/types/WebSocketHandshake.ts
@@ -1,3 +1,3 @@
 // This file was generated by [ts-rs](https://github.com/Aleph-Alpha/ts-rs). Do not edit this file manually.
 
-export type WebSocketHandshake = { token: string, deviceId: string, lastSeenVaultUpdateId: number | null, };
+export type WebSocketHandshake = { token: string, deviceId: string, };
diff --git a/frontend/sync-client/src/services/types/WebSocketServerMessage.ts b/frontend/sync-client/src/services/types/WebSocketServerMessage.ts
index 2a7a7813..c9759e04 100644
--- a/frontend/sync-client/src/services/types/WebSocketServerMessage.ts
+++ b/frontend/sync-client/src/services/types/WebSocketServerMessage.ts
@@ -1,5 +1,4 @@
 // This file was generated by [ts-rs](https://github.com/Aleph-Alpha/ts-rs). Do not edit this file manually.
 import type { CursorPositionFromServer } from "./CursorPositionFromServer";
-import type { EventBatch } from "./EventBatch";
 
-export type WebSocketServerMessage = { "type": "vaultEvents" } & EventBatch | { "type": "cursorPositions" } & CursorPositionFromServer;
+export type WebSocketServerMessage = { "type": "vaultChanged" } | { "type": "cursorPositions" } & CursorPositionFromServer;
diff --git a/sync-server/src/app_state/database/models.rs b/sync-server/src/app_state/database/models.rs
index 57c4cd94..5330a8dc 100644
--- a/sync-server/src/app_state/database/models.rs
+++ b/sync-server/src/app_state/database/models.rs
@@ -123,5 +123,11 @@ pub struct VaultSnapshot {
 pub struct EventBatch {
     #[ts(as = "f64")]
     pub head_event_id: VaultUpdateId,
+
+    /// Last event in this page; `head_event_id` is the vault's current head.
+    #[serde(skip_serializing_if = "Option::is_none")]
+    #[ts(optional, as = "Option<f64>")]
+    pub end_event_id: Option<VaultUpdateId>,
+
     pub events: Vec<EventRecord>,
 }
diff --git a/sync-server/src/app_state/websocket/models.rs b/sync-server/src/app_state/websocket/models.rs
index 32d97966..4eb1fa10 100644
--- a/sync-server/src/app_state/websocket/models.rs
+++ b/sync-server/src/app_state/websocket/models.rs
@@ -1,16 +1,13 @@
 use serde::{Deserialize, Serialize};
 use ts_rs::TS;
 
-use crate::app_state::database::models::{DeviceId, DocumentId, EventBatch, VaultUpdateId};
+use crate::app_state::database::models::{DeviceId, DocumentId, VaultUpdateId};
 
 #[derive(TS, Deserialize, Clone, Debug)]
 #[serde(rename_all = "camelCase")]
 pub struct WebSocketHandshake {
     pub token: String,
     pub device_id: DeviceId,
-
-    #[ts(as = "Option<i32>")]
-    pub last_seen_vault_update_id: Option<VaultUpdateId>,
 }
 
 #[derive(TS, Deserialize, Clone, Debug)]
@@ -67,6 +64,6 @@ pub enum WebSocketClientMessage {
 #[serde(rename_all = "camelCase", tag = "type")]
 #[ts(export)]
 pub enum WebSocketServerMessage {
-    VaultEvents(EventBatch),
+    VaultChanged,
     CursorPositions(CursorPositionFromServer),
 }
diff --git a/sync-server/src/server/responses.rs b/sync-server/src/server/responses.rs
index 66c5b5cb..e8d85687 100644
--- a/sync-server/src/server/responses.rs
+++ b/sync-server/src/server/responses.rs
@@ -2,7 +2,7 @@ use serde::{self, Deserialize, Serialize};
 use ts_rs::TS;
 
 use crate::app_state::database::models::{
-    DocumentVersion, DocumentVersionWithoutContent, FileManifest, VaultUpdateId,
+    DocumentVersionWithoutContent, FileManifest, VaultUpdateId,
 };
 
 /// Response to a ping request.
@@ -34,7 +34,7 @@ pub enum DocumentUpdateResponse {
     Accepted(DocumentVersionWithoutContent),
 
     /// Nothing was written. The client must incorporate this version before retrying.
-    StaleBase(DocumentVersion),
+    StaleBase(DocumentVersionWithoutContent),
 }
 
 #[derive(TS, Debug, Clone, Serialize, Deserialize)]