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

## 1.9.0

**`(feat):`** Support `x-fern-default` as fallback value for parameters in generated Ruby SDKs.
When a header, query parameter, or path parameter has a `clientDefault` value in the IR,
the generated Ruby SDK makes that parameter optional with the default value automatically applied.