> This page is for SDK, version Legacy.
> For other versions, use one of these documentation indexes:
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> - Legacy: https://buildwithfern.com/learn/sdks/legacy/llms.txt

> For clean Markdown content of this page, append .md to this URL. For the complete documentation index, see https://buildwithfern.com/learn/llms.txt.

## 4.21.2

**`(chore):`** 通过在构造片段注册表时将 HEAD HTTP 方法视为 POST 方法而不是失败来优雅地处理 HEAD HTTP 方法。

## 4.21.1

**`(chore):`** 确保在本地模式生成时（如果启用了自托管）也生成 README 和 Reference。

## 4.21.0

**`(chore):`** 升级到 IR v58。