> For clean Markdown content of this page, append .md to this URL. For the complete documentation index, see https://buildwithfern.com/learn/llms.txt. ## 0.18.0 **`(feat):`** Add support for simpler unions, which is configurable with `union: v1` (if omitted, the default `v0` version will be used). **`(feat):`** Add support for multiple files in upload endpoints.