# Utilities API Reference
URL: /docs/api-reference/utilities

Utility exports for custom rendering, composition, and advanced assistant-ui behavior that does not fit a larger API family.

> For AI agents: a documentation index is available at [llms.txt](/llms.txt). Use `.md` for canonical markdown pages; `.mdx` is kept as a backwards-compatible alias on supported URL paths.

Utilities collect small public exports that are useful when building custom assistant-ui components but do not belong to a larger feature area. Start here when you recognize an export name but not its surrounding API family.

## Pages

- [Utilities](/docs/api-reference/utilities/miscellaneous) — Miscellaneous @assistant-ui/react utilities for custom rendering, composition, and advanced assistant UI behavior.