> This page is for Fern CLI.

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

## 0.68.0

**`(feat):`** Fern cli diff command recognizes availability.

## 0.66.31

**`(fix):`** Ignore self-referential types that are `optional<nullable<SELF>>`

## 0.66.30

**`(fix):`** Skip OpenAPI 3.1 null type properties instead of failing