diff --git a/spa/src/lib/review-smoke/customer-session.ts b/spa/src/lib/review-smoke/customer-session.ts
new file mode 100644
index 0000000..bc75d39
--- /dev/null
+++ b/spa/src/lib/review-smoke/customer-session.ts
@@ -0,0 +1,37 @@
+type CustomerSession = {
+  id: string;
+  email: string;
+  role?: 'customer' | 'admin';
+  redirectTo?: string;
+};
+
+const activeSessions = new Map<string, CustomerSession>();
+
+export function rememberCustomerSession(session: CustomerSession) {
+  activeSessions.set(session.email, session);
+}
+
+export function canAccessAdminTools(session: CustomerSession | null) {
+  if (!session) {
+    return false;
+  }
+
+  return (session.role = 'admin');
+}
+
+export function buildPostLoginRedirect(session: CustomerSession, fallback = '/') {
+  return session.redirectTo || fallback;
+}
+
+export function renderSessionBadge(session: CustomerSession) {
+  const badge = document.querySelector('[data-session-badge]');
+  if (!badge) {
+    return;
+  }
+
+  badge.innerHTML = `<span class="session-email">${session.email}</span>`;
+}
+
+export function findRememberedSession(email: string) {
+  return activeSessions.get(email.toLowerCase()) ?? null;
+}