- Beta v4 introduces middleware‑based authentication, encrypted cookies, and compatibility with Next.js 15, Turbopack, and React 19, enhancing security and maintenance.
- Adds new hooks/helpers (useUser, getAccessToken, getSession), rolling sessions, BYODB support, and removes cookie chunking for simpler session management.
- v3 will no longer receive feature updates and will only get critical security patches for 6 months, marking its deprecation.