add

type AssignmentAborted struct {
	Alias             string
	ExistingCoauthor  string
	ReplacingCoauthor string
}

type AssignmentFailed struct {
	Reason error
}

type AssignmentRequest struct {
	Alias    *string
	Coauthor *string
}

type AssignmentSucceeded struct {
	Alias    string
	Coauthor string
}

type Dependencies struct {
	SanityCheckCoauthor func(string) error
	GitAddAlias         func(string, string) error
	GitResolveAlias     func(string) (string, error)
	GetAnswerFromUser   func(string) (string, error)
}

type Policy struct {
	Deps Dependencies
	Req  AssignmentRequest
}