// define configuration structs:
type Options struct {
    Output string `yaml:"output"`
    Scanning ScanningOptions `yaml:"scanning"`
	EmbeddedOptions `yaml:",inline,squash"` // need to use ,squash
}

type ScanningOptions struct {
    Depth int `yaml:"output"`
}

type EmbeddedOptions struct {
	Embedded string `yaml:"string"`
}

// fangs needs a configuration with a minimum of an app name
cfg := config.NewConfig("my-app")

// in a cobra configuration function:
func makeCommand(cfg config.Config) cobra.Command {
    // an instance of options with defaults we use to add flags and configure
    opts := Options{
        Output: "default",
        Scanning: ScanningOptions {
            Depth: 1,
        },
    }

    // make a cobra command with the options you need
    cmd := cobra.Command{
        RunE: func(cmd *cobra.Command, args []string) error {
            // before using opts, call config.Load with the cmd instance,
            // after flags have been added
            err := config.Load(cfg, cmd, &opts)
            // ...
        },
    }

    // add flags like normal, making sure to use the *Var* variants
    flags := cmd.Flags()
    flags.StringVarP(&opts.Output, "output", "o", opts.Output, "output usage")
    flags.IntVar(&opts.Scanning.Depth, "depth", opts.Scanning.Depth, "depth usage")
    
    return cmd
}