messages

type Model interface {
	layout.Model
	layout.Sizeable
	layout.Focusable
	layout.Help

	AddUserMessage(content string) tea.Cmd
	AddErrorMessage(content string) tea.Cmd
	AddAssistantMessage() tea.Cmd
	AddSeparatorMessage() tea.Cmd
	AddOrUpdateToolCall(agentName string, toolCall tools.ToolCall, toolDef tools.Tool, status types.ToolStatus) tea.Cmd
	AddToolResult(msg *runtime.ToolCallResponseEvent, status types.ToolStatus) tea.Cmd
	AppendToLastMessage(agentName string, messageType types.MessageType, content string) tea.Cmd
	ClearMessages()
	ScrollToBottom() tea.Cmd
	AddShellOutputMessage(content string) tea.Cmd
	AddSystemMessage(content string) tea.Cmd
	PlainTextTranscript() string
	IsAtBottom() bool
}