program

type Options struct {
	Version bool `help:"Show program version"`

	Debug        bool        `group:"Info" help:"Show debugging information"`
	OutputFormat string      `group:"Info" enum:"auto,jsonl,terminal" default:"auto" help:"How to show program output (auto|terminal|jsonl)"`
	Quiet        bool        `group:"Info" help:"Be less verbose than usual"`
	Cmd1         Subcommand1 `cmd:""`
	Cmd2         Subcommand2 `cmd:""`
}

type Subcommand1 struct {
	Dir1 string `group:"dir" help:"get a directory" type:"existingdir" default:"dir1"`
}

type Subcommand2 struct {
	Dir2 string `group:"dir" help:"get a directory" type:"existingdir" default:"dir2"`
}

type VersionCmd struct{}