> Documentation index: https://docs.beetl.io/llms.txt

# Reference

> Limits and error codes, in one place.

Source: https://docs.beetl.io/reference/
Last updated: 2026-10-03

Reference holds the facts you look up rather than read: the limits Beetl enforces and the error
codes it returns. Each entry links to the page that explains it in context.

## In this section

| Page                                  | What it covers                                               |
| ------------------------------------- | ------------------------------------------------------------ |
| [Limits](https://docs.beetl.io/reference/limits)           | The limits to plan around, in one place.                     |
| [Error codes](https://docs.beetl.io/reference/error-codes) | The error codes you can see, what they mean, and what to do. |

## Related

- [DataFusion SQL](https://docs.beetl.io/query/datafusion-sql): The SQL dialect your queries and pipeline stages run on.

- [Tool reference](https://docs.beetl.io/mcp/tool-reference): Every tool an MCP client can call, with its scope and arguments.