diff --git a/apps/desktop-shell/scripts/check-config.mjs b/apps/desktop-shell/scripts/check-config.mjs
index 8fa76db41..575f89921 100644
--- a/apps/desktop-shell/scripts/check-config.mjs
+++ b/apps/desktop-shell/scripts/check-config.mjs
@@ -2563,6 +2563,7 @@ for (const snippet of [
   'DesktopNotificationPermissionAction',
   'desktop_notification_permission_action',
   'notification_permission_unavailable_response',
+  'notification_delivery_unavailable_response',
   'PermissionState::Granted',
   'PermissionState::Denied',
   'PermissionState::Prompt | PermissionState::PromptWithRationale',
@@ -2570,9 +2571,11 @@ for (const snippet of [
   'json!({"action": HOST_BRIDGE_LOCAL_NOTIFICATION_DELIVERED_TO_SYSTEM_ACTION})',
   'local_notification_payload_truncates_to_shared_contract_limits',
   'notification_permission_unavailable_response_is_stable',
+  'notification_delivery_unavailable_response_is_stable',
   '"a".repeat(HOST_BRIDGE_LOCAL_NOTIFICATION_TITLE_MAX_LENGTH)',
   '"b".repeat(HOST_BRIDGE_LOCAL_NOTIFICATION_BODY_MAX_LENGTH)',
   '"notification permission unavailable"',
+  '"notification delivery unavailable"',
   '"notification permission denied"',
   'app.notification().builder()',
 ]) {
diff --git a/apps/desktop-shell/src-tauri/src/host_bridge/notifications.rs b/apps/desktop-shell/src-tauri/src/host_bridge/notifications.rs
index 7cd288738..a4abfb8b1 100644
--- a/apps/desktop-shell/src-tauri/src/host_bridge/notifications.rs
+++ b/apps/desktop-shell/src-tauri/src/host_bridge/notifications.rs
@@ -97,6 +97,14 @@ fn notification_permission_unavailable_response(request: &HostBridgeRequest) ->
     )
 }
 
+fn notification_delivery_unavailable_response(request: &HostBridgeRequest) -> HostBridgeResponse {
+    failed(
+        request.id.clone(),
+        "host_error",
+        "notification delivery unavailable",
+    )
+}
+
 pub(crate) fn show_desktop_local_notification(
     app: &tauri::AppHandle,
     request: &HostBridgeRequest,
@@ -142,7 +150,7 @@ pub(crate) fn show_desktop_local_notification(
             request.id.clone(),
             desktop_notification_delivered_to_system_result(),
         ),
-        Err(error) => failed(request.id.clone(), "host_error", error.to_string()),
+        Err(_) => notification_delivery_unavailable_response(request),
     }
 }
 
@@ -200,6 +208,17 @@ mod tests {
         assert_eq!(error.message, "notification permission unavailable");
     }
 
+    #[test]
+    fn notification_delivery_unavailable_response_is_stable() {
+        let request = request("notification.showLocal");
+
+        let response = notification_delivery_unavailable_response(&request);
+        let error = response.error.expect("error");
+
+        assert_eq!(error.code, "host_error");
+        assert_eq!(error.message, "notification delivery unavailable");
+    }
+
     #[test]
     fn local_notification_payload_rejects_empty_and_control_text() {
         let mut empty = request("notification.showLocal");