suggest

type InputFlag struct {
	Name  string
	Value string
	Short bool // -a or -abc style
	// a bare flag does not have value part (which means it's NOT in "--name=value" format)
	Bare bool
}

type InputingCommand struct {
	// normal (positional) args of the inputing command
	Args           []string
	MatchingPrefix string // the prefix of inputing arg or flag, could be an empty string.
	// count of positional args, excluding the last arg if it self is positional flag.
	// eg: "brush --dry-run --max-sites 10 local mteam" => 2,
	// as "brush" and "local" are positional args. last arg "mteam" also is, but is not counted.
	// "--dry-run" and "--max-sites 10" are flags.
	LastArgIndex  int64
	LastArgIsFlag bool   // if last arg is a flag
	LastArgFlag   string // the flag name of last arg
}