fix default

Author: blva

tools/cli/internal/cli/split/split.go

@@ -128,7 +128,7 @@ func Builder() *cobra.Command {
 	cmd.Flags().StringVarP(&opts.basePath, flag.Spec, flag.SpecShort, "-", usage.Spec)
 	cmd.Flags().StringVar(&opts.env, flag.Environment, "", usage.Environment)
 	cmd.Flags().StringVarP(&opts.outputPath, flag.Output, flag.OutputShort, "", usage.Output)
-	cmd.Flags().StringVarP(&opts.format, flag.Format, flag.FormatShort, openapi.ALL, usage.Format)
+	cmd.Flags().StringVarP(&opts.format, flag.Format, flag.FormatShort, openapi.JSON, usage.Format)
 	cmd.Flags().StringVar(&opts.gitSha, flag.GitSha, "", usage.GitSha)
 
 	_ = cmd.MarkFlagRequired(flag.Output)