> For AI agents: the complete documentation index is available at /llms.txt, the full documentation bundle is available at /llms-full.txt.

# AAI

> **Themelio compatibility reference.** This page describes the retained Themelio implementation or its historical design. Check the [parallel-operation guide](/compatibility/index.md) before applying it to the current platform.

AAI (Authentication, Authorization, and Identity) is the infrastructure layer responsible for managing user authentication (verifying identity), authorization (controlling access), and identity management across the platform. In Themelio, this is implemented through Pharos AAI using RCIAM, Keycloak, and OIDC.

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<a href="/source/docs/content/terms/aai.md.txt">Source snapshot</a> · Revision `f928834c8`.

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