Lucia

Lucia was deprecated in March 2025. This website was updated in July 2026 (announcement). See code/auth_session.ts for a complete, single-file replacement for the NPM package.

For a deep dive on everything auth, see the Auth Book. Feel free to ask questions on the Discord server linked in the book.

This website is maintained by Pilcrow. The source code is hosted at github.com/lucia-auth/lucia.