> For clean Markdown content of this page, append .md to this URL. For the complete documentation index, see https://buildwithfern.com/learn/llms.txt. ## 0.39.12 **`(fix):`** The mock folder now includes source files, and the CLI no longer hard fails if it cannot resolve source files that are of OpenAPI type. ## 0.39.11 **`(fix):`** The Fern CLI now handles parsing `x-fern-parameter-name` on path parameters in an OpenAPI spec. ### What's been fixed * Fix: The Fern CLI now handles parsing `x-fern-parameter-name` on path parameters in an OpenAPI spec. For example, if you want to rename a path parameter in the generated SDK, you can now do: ```yml paths: "/user": get: operationId: list_user parameters: - in: header name: X-API-Version x-fern-parameter-name: version schema: type: string required: true ``` For more information, please check out the [docs](https://buildwithfern.com/learn/api-definition/openapi/extensions/parameter-names).