stabilize tests

offline/notifier/verify_notify_kit.sh

@@ -0,0 +1,18 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+ROOT=$(cd "$(dirname "$0")" && pwd)
+MANIFEST="$ROOT/notify-kit.manifest.json"
+HASHES="$ROOT/artifact-hashes.json"
+
+if [ ! -f "$MANIFEST" ]; then
+  echo "notify-kit.manifest.json missing" >&2
+  exit 1
+fi
+
+if [ ! -f "$HASHES" ]; then
+  echo "artifact-hashes.json missing" >&2
+  exit 1
+fi
+
+echo "Notify kit manifest and hash list present."