Changelog

3.0.1

(fix): Fix substitute-env-vars not applying to arrays in docs configuration. The replaceEnvVariables function now recursively processes array elements, enabling environment variable substitution in arrays of strings, arrays of objects, and deeply nested array structures (such as navigation items, navbar links, footer links, redirects, etc.).

3.0.0

(break): Breaking Change: Enable smart-casing by default for all generators.

Smart-casing improves naming conventions in generated SDKs by:

• Capitalizing common initialisms like API, HTTP, ID, UUID, URL, HTML, JSON, XML, etc. in camelCase and PascalCase identifiers
• Better handling of number-letter combinations (e.g., v2 stays as v2 instead of becoming v_2, md5 stays as md5 instead of md_5)

Migration Behavior: The CLI will automatically upgrade your generators.yml to explicitly set smart-casing: false for all existing generators that don’t have it configured. This preserves backwards compatibility for existing projects while enabling the improved naming for new projects.

Opting In: To enable smart-casing for existing generators, remove the smart-casing: false line that the migration adds, or explicitly set smart-casing: true.

2.18.1

(fix): Improve enum validation error messages to show which enum value has an invalid name. When the API source is OpenAPI, the error message now includes guidance about using the x-fern-enum extension to specify valid names.

2.18.0

(feat): Add --fernignore CLI option for remote generation. This allows users to provide a custom .fernignore file that will replace the existing one on the main branch during remote generation. The custom fernignore will be applied during generation and committed to the repository.