> For clean Markdown content of this page, append .md to this URL. For the complete documentation index, see https://buildwithfern.com/learn/llms.txt. ## 1.20.0 **`(feat):`** Add `errorCodes` config option with values `per-endpoint` or `global`. The `global` mode (default) generates a shared `error_codes.go` file for all errors. The `per-endpoint` mode generates error handling code inline for each endpoint, which is more robust for namespaced APIs or APIs where different endpoints have different error schemas for the same status code.