# JAAS > JAAS is an enterprise layer on top of Juju that provides centralized controller management, OIDC authentication, and ReBAC authorization. 2026 CC-BY-SA, Canonical Group Ltd ## Pages in this subsection - [jaas add-cloud](https://documentation.ubuntu.com/jaas/latest/reference/list-of-jaas-plugin-commands.md): Add cloud to specific controller in jimm ## Optional - [Top-level llms.txt](https://documentation.ubuntu.com/jaas/latest/llms.txt): Complete documentation index.