shell

type Message struct {
	Role    string // "user" or "assistant"
	Content string
}

type Shell struct {
	State    *state.ProjectState
	Provider provider.Provider
	Model    string
	Timeout  time.Duration
	History  []Message
	WorkDir  string // project root, used for prompt-stats hint injection

	// OnToken, if set, enables streaming. Each token chunk is passed to this
	// callback as the AI generates its response.
	OnToken func(token string)

	// OnSave is called after any action that mutates state so that the caller
	// can persist the change to disk.
	OnSave func() error
}