diff --git a/packages/shared/src/index.ts b/packages/shared/src/index.ts
index 227521b..bd1dfbb 100644
--- a/packages/shared/src/index.ts
+++ b/packages/shared/src/index.ts
@@ -20,6 +20,9 @@ export type MeResponse = z.infer<typeof MeResponse>;
 export const InsoleType = z.enum(['Kurk', 'Berk', '3D']);
 export type InsoleType = z.infer<typeof InsoleType>;
 
+export const Role = z.enum(['worker', 'admin']);
+export type Role = z.infer<typeof Role>;
+
 export const Activity = z.object({
   id: z.number().int(),
   name: z.string(),
@@ -45,6 +48,8 @@ export const WorkSession = z.object({
   user_id: z.string(),
   activity_id: z.number().int(),
   activity_name: z.string().optional(), // present on history/active joins
+  user_name: z.string().optional(), // present only on admin cross-user views
+  user_email: z.string().optional(), // present only on admin cross-user views
   insole_type: InsoleType.nullable(),
   pair_count: z.number().int(),
   start_time: z.string(), // ISO-8601
@@ -63,3 +68,12 @@ export const StartSessionInput = z.object({
   pair_count: z.number().int().min(1).default(2),
 });
 export type StartSessionInput = z.infer<typeof StartSessionInput>;
+
+export const AdminUser = z.object({
+  id: z.string(),
+  email: z.string().email(),
+  name: z.string(),
+  role: Role,
+  created_at: z.string(),
+});
+export type AdminUser = z.infer<typeof AdminUser>;