diff --git a/backend/src/routes/auth.ts b/backend/src/routes/auth.ts
new file mode 100644
index 0000000..bce0897
--- /dev/null
+++ b/backend/src/routes/auth.ts
@@ -0,0 +1,6 @@
+import { FastifyInstance } from 'fastify';
+
+export default async function authRoutes(fastify: FastifyInstance) {
+  // Placeholder for auth routes
+  // Implementation from T03 should be added here
+}