> For clean Markdown content of this page, append .md to this URL. For the complete documentation index, see https://buildwithfern.com/learn/llms.txt. ## 4.49.0 **`(feat):`** Add `mypy_exclude` custom config option to exclude directories from mypy type checking. This is useful when `.fernignore` preserves directories (like `legacy/` or `tests/integration/`) that contain code incompatible with the generated SDK.