refactor(chat): simplify to CLI interface

Replace Bubble Tea TUI with a simple bufio-based CLI loop for chatting.
Add strong system prompt to history for model identity.
Update quitting logic and output formatting with colors.

cmd/chat.go

@@ -1,14 +1,11 @@
 package cmd
 
 import (
+	"bufio"
 	"fmt"
 	"os"
 	"strings"
 
-	"github.com/charmbracelet/bubbles/textarea"
-	"github.com/charmbracelet/bubbles/viewport"
-	tea "github.com/charmbracelet/bubbletea"
-	"github.com/charmbracelet/lipgloss"
 	"github.com/fatih/color"
 	"github.com/spf13/cobra"
 	"gmgauthier.com/grokkit/config"
@@ -17,162 +14,51 @@ import (
 
 var chatCmd = &cobra.Command{
 	Use:   "chat",
-	Short: "Beautiful interactive TUI chat with Grok (full history + streaming)",
+	Short: "Simple interactive CLI chat with Grok (full history + streaming)",
 	Run: func(cmd *cobra.Command, args []string) {
 		modelFlag, _ := cmd.Flags().GetString("model")
 		model := config.GetModel(modelFlag)
 
-		p := tea.NewProgram(initialModel(model), tea.WithAltScreen(), tea.WithMouseCellMotion())
+		client := grok.NewClient()
-		if _, err := p.Run(); err != nil {
+
-			color.Red("TUI error: %v", err)
+		// Strong system prompt to lock in correct model identity
-			os.Exit(1)
+		systemPrompt := map[string]string{
+			"role":    "system",
+			"content": fmt.Sprintf("You are Grok 4, the latest and most powerful model from xAI (2026). You are currently running as `%s`. Be helpful, truthful, and a little irreverent. Never claim to be an older model.", model),
+		}
+
+		history := []map[string]string{systemPrompt}
+
+		color.Cyan("┌──────────────────────────────────────────────────────────────┐")
+		color.Cyan("│ Grokkit Chat  —  Model: %s                                 │", model)
+		color.Cyan("│ Type /quit or Ctrl+C to exit                                 │")
+		color.Cyan("└──────────────────────────────────────────────────────────────┘\n")
+
+		scanner := bufio.NewScanner(os.Stdin)
+
+		for {
+			color.Yellow("You > ")
+			if !scanner.Scan() {
+				break
+			}
+
+			input := strings.TrimSpace(scanner.Text())
+			if input == "" {
+				continue
+			}
+			if input == "/quit" || input == "/q" || input == "exit" {
+				color.Cyan("\nGoodbye 👋\n")
+				break
+			}
+
+			history = append(history, map[string]string{"role": "user", "content": input})
+
+			color.Green("Grok > ")
+			reply := client.Stream(history, model)
+
+			history = append(history, map[string]string{"role": "assistant", "content": reply})
+
+			fmt.Println()
 		}
 	},
 }
-
-type replyMsg string
-
-type model struct {
-	viewport viewport.Model
-	textarea textarea.Model
-	history  []string
-	client   *grok.Client
-	model    string
-	width    int
-	height   int
-	quitting bool
-}
-
-func initialModel(modelName string) model {
-	ta := textarea.New()
-	ta.Placeholder = "Type your message... (Enter to send, /quit to exit)"
-	ta.Focus()
-	ta.SetHeight(3)
-	ta.ShowLineNumbers = false
-
-	vp := viewport.New(0, 0)
-
-	return model{
-		textarea: ta,
-		viewport: vp,
-		history:  []string{},
-		client:   grok.NewClient(),
-		model:    modelName,
-	}
-}
-
-func (m model) Init() tea.Cmd {
-	return textarea.Blink
-}
-
-func (m model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
-	var cmd tea.Cmd
-	var cmds []tea.Cmd
-
-	switch msg := msg.(type) {
-	case tea.WindowSizeMsg:
-		m.width = msg.Width
-		m.height = msg.Height
-		m.viewport.Width = msg.Width
-		m.viewport.Height = msg.Height - m.textarea.Height() - 5
-		m.textarea.SetWidth(msg.Width - 4)
-		return m, nil
-
-	case tea.KeyMsg:
-		switch msg.String() {
-		case "ctrl+c", "esc":
-			m.quitting = true
-			return m, tea.Quit
-		case "enter":
-			input := strings.TrimSpace(m.textarea.Value())
-			if input == "" {
-				return m, nil
-			}
-			if input == "/quit" || input == "/q" {
-				m.quitting = true
-				return m, tea.Quit
-			}
-
-			m.history = append(m.history, "You > "+input)
-			m.viewport.SetContent(buildHistoryView(m.history))
-			m.viewport.GotoBottom()
-
-			m.textarea.SetValue("")
-
-			historyForAPI := buildHistoryForAPI(m.history)
-			cmds = append(cmds, streamReplyCmd(m.client, historyForAPI, m.model))
-
-			return m, tea.Batch(cmds...)
-		}
-
-	case replyMsg:
-		m.history = append(m.history, "Grok > "+string(msg))
-		m.viewport.SetContent(buildHistoryView(m.history))
-		m.viewport.GotoBottom()
-		return m, nil
-	}
-
-	m.textarea, cmd = m.textarea.Update(msg)
-	cmds = append(cmds, cmd)
-	m.viewport, cmd = m.viewport.Update(msg)
-	cmds = append(cmds, cmd)
-
-	return m, tea.Batch(cmds...)
-}
-
-func buildHistoryView(lines []string) string {
-	userStyle := lipgloss.NewStyle().Foreground(lipgloss.Color("33"))
-	grokStyle := lipgloss.NewStyle().Foreground(lipgloss.Color("10"))
-
-	var b strings.Builder
-	for _, line := range lines {
-		if strings.HasPrefix(line, "You > ") {
-			b.WriteString(userStyle.Render(line) + "\n")
-		} else if strings.HasPrefix(line, "Grok > ") {
-			b.WriteString(grokStyle.Render(line) + "\n")
-		} else {
-			b.WriteString(line + "\n")
-		}
-	}
-	return b.String()
-}
-
-func buildHistoryForAPI(lines []string) []map[string]string {
-	h := []map[string]string{
-		{"role": "system", "content": fmt.Sprintf("You are Grok 4, the latest model from xAI (2026). You are currently running as `%s`.", "grok-4")},
-	}
-	for _, line := range lines {
-		if strings.HasPrefix(line, "You > ") {
-			h = append(h, map[string]string{"role": "user", "content": strings.TrimPrefix(line, "You > ")})
-		} else if strings.HasPrefix(line, "Grok > ") {
-			h = append(h, map[string]string{"role": "assistant", "content": strings.TrimPrefix(line, "Grok > ")})
-		}
-	}
-	return h
-}
-
-func streamReplyCmd(client *grok.Client, history []map[string]string, model string) tea.Cmd {
-	return func() tea.Msg {
-		reply := client.StreamSilent(history, model)
-		return replyMsg(reply)
-	}
-}
-
-func (m model) View() string {
-	if m.quitting {
-		return "Goodbye 👋\n"
-	}
-
-	header := lipgloss.NewStyle().
-		Bold(true).
-		Foreground(lipgloss.Color("12")).
-		Width(m.width).
-		Align(lipgloss.Center).
-		Render(fmt.Sprintf(" Grokkit Chat  —  Model: %s ", m.model))
-
-	return lipgloss.JoinVertical(lipgloss.Left,
-		header,
-		m.viewport.View(),
-		m.textarea.View(),
-	)
-}