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Lucia is a lightweight open-source auth library for TypeScript providing session management primitives without abstracting the database layer. Gives developers core building blocks — session creation, validation, invalidation — while they own the schema and auth logic. Supports any database through a simple adapter. Works with Next.js, SvelteKit, Astro, Express, and Hono. For developers wanting full control over auth implementation with minimal overhead and zero vendor lock-in.
Minimalist auth providing session primitives. Full control over database schema and auth flows.
Session creation, validation, invalidation, cookie management. Build custom login flows on top.
Database-agnostic through simple adapters. Works with any TS/JS framework.
Focused purely on sessions — for developers who want to understand every part of their auth.
Free and open-source
TypeScript, Node.js, any framework
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