tui: update lodos

+ various other small tweaks

go.mod

@@ -4,6 +4,8 @@ go 1.21
 
 require (
 	github.com/alecthomas/chroma/v2 v2.11.1
+	github.com/charmbracelet/bubbles v0.18.0
+	github.com/charmbracelet/bubbletea v0.25.0
 	github.com/charmbracelet/lipgloss v0.10.0
 	github.com/go-yaml/yaml v2.1.0+incompatible
 	github.com/sashabaranov/go-openai v1.17.7
@@ -14,7 +16,9 @@ require (
 )
 
 require (
+	github.com/atotto/clipboard v0.1.4 // indirect
 	github.com/aymanbagabas/go-osc52/v2 v2.0.1 // indirect
+	github.com/containerd/console v1.0.4-0.20230313162750-1ae8d489ac81 // indirect
 	github.com/dlclark/regexp2 v1.10.0 // indirect
 	github.com/inconshreveable/mousetrap v1.1.0 // indirect
 	github.com/jinzhu/inflection v1.0.0 // indirect
@@ -22,13 +26,19 @@ require (
 	github.com/kr/pretty v0.3.1 // indirect
 	github.com/lucasb-eyer/go-colorful v1.2.0 // indirect
 	github.com/mattn/go-isatty v0.0.18 // indirect
+	github.com/mattn/go-localereader v0.0.1 // indirect
 	github.com/mattn/go-runewidth v0.0.15 // indirect
 	github.com/mattn/go-sqlite3 v1.14.18 // indirect
+	github.com/muesli/ansi v0.0.0-20211018074035-2e021307bc4b // indirect
+	github.com/muesli/cancelreader v0.2.2 // indirect
 	github.com/muesli/reflow v0.3.0 // indirect
 	github.com/muesli/termenv v0.15.2 // indirect
 	github.com/rivo/uniseg v0.4.7 // indirect
 	github.com/spf13/pflag v1.0.5 // indirect
+	golang.org/x/sync v0.1.0 // indirect
 	golang.org/x/sys v0.14.0 // indirect
+	golang.org/x/term v0.6.0 // indirect
+	golang.org/x/text v0.3.8 // indirect
 	gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15 // indirect
 	gopkg.in/yaml.v2 v2.2.2 // indirect
 )

go.sum

@@ -4,10 +4,18 @@ github.com/alecthomas/chroma/v2 v2.11.1 h1:m9uUtgcdAwgfFNxuqj7AIG75jD2YmL61BBIJW
 github.com/alecthomas/chroma/v2 v2.11.1/go.mod h1:4TQu7gdfuPjSh76j78ietmqh9LiurGF0EpseFXdKMBw=
 github.com/alecthomas/repr v0.2.0 h1:HAzS41CIzNW5syS8Mf9UwXhNH1J9aix/BvDRf1Ml2Yk=
 github.com/alecthomas/repr v0.2.0/go.mod h1:Fr0507jx4eOXV7AlPV6AVZLYrLIuIeSOWtW57eE/O/4=
+github.com/atotto/clipboard v0.1.4 h1:EH0zSVneZPSuFR11BlR9YppQTVDbh5+16AmcJi4g1z4=
+github.com/atotto/clipboard v0.1.4/go.mod h1:ZY9tmq7sm5xIbd9bOK4onWV4S6X0u6GY7Vn0Yu86PYI=
 github.com/aymanbagabas/go-osc52/v2 v2.0.1 h1:HwpRHbFMcZLEVr42D4p7XBqjyuxQH5SMiErDT4WkJ2k=
 github.com/aymanbagabas/go-osc52/v2 v2.0.1/go.mod h1:uYgXzlJ7ZpABp8OJ+exZzJJhRNQ2ASbcXHWsFqH8hp8=
+github.com/charmbracelet/bubbles v0.18.0 h1:PYv1A036luoBGroX6VWjQIE9Syf2Wby2oOl/39KLfy0=
+github.com/charmbracelet/bubbles v0.18.0/go.mod h1:08qhZhtIwzgrtBjAcJnij1t1H0ZRjwHyGsy6AL11PSw=
+github.com/charmbracelet/bubbletea v0.25.0 h1:bAfwk7jRz7FKFl9RzlIULPkStffg5k6pNt5dywy4TcM=
+github.com/charmbracelet/bubbletea v0.25.0/go.mod h1:EN3QDR1T5ZdWmdfDzYcqOCAps45+QIJbLOBxmVNWNNg=
 github.com/charmbracelet/lipgloss v0.10.0 h1:KWeXFSexGcfahHX+54URiZGkBFazf70JNMtwg/AFW3s=
 github.com/charmbracelet/lipgloss v0.10.0/go.mod h1:Wig9DSfvANsxqkRsqj6x87irdy123SR4dOXlKa91ciE=
+github.com/containerd/console v1.0.4-0.20230313162750-1ae8d489ac81 h1:q2hJAaP1k2wIvVRd/hEHD7lacgqrCPS+k8g1MndzfWY=
+github.com/containerd/console v1.0.4-0.20230313162750-1ae8d489ac81/go.mod h1:YynlIjWYF8myEu6sdkwKIvGQq+cOckRm6So2avqoYAk=
 github.com/cpuguy83/go-md2man/v2 v2.0.3/go.mod h1:tgQtvFlXSQOSOSIRvRPT7W67SCa46tRHOmNcaadrF8o=
 github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
 github.com/dlclark/regexp2 v1.10.0 h1:+/GIL799phkJqYW+3YbOd8LCcbHzT0Pbo8zl70MHsq0=
@@ -30,11 +38,17 @@ github.com/lucasb-eyer/go-colorful v1.2.0 h1:1nnpGOrhyZZuNyfu1QjKiUICQ74+3FNCN69
 github.com/lucasb-eyer/go-colorful v1.2.0/go.mod h1:R4dSotOR9KMtayYi1e77YzuveK+i7ruzyGqttikkLy0=
 github.com/mattn/go-isatty v0.0.18 h1:DOKFKCQ7FNG2L1rbrmstDN4QVRdS89Nkh85u68Uwp98=
 github.com/mattn/go-isatty v0.0.18/go.mod h1:W+V8PltTTMOvKvAeJH7IuucS94S2C6jfK/D7dTCTo3Y=
+github.com/mattn/go-localereader v0.0.1 h1:ygSAOl7ZXTx4RdPYinUpg6W99U8jWvWi9Ye2JC/oIi4=
+github.com/mattn/go-localereader v0.0.1/go.mod h1:8fBrzywKY7BI3czFoHkuzRoWE9C+EiG4R1k4Cjx5p88=
 github.com/mattn/go-runewidth v0.0.12/go.mod h1:RAqKPSqVFrSLVXbA8x7dzmKdmGzieGRCM46jaSJTDAk=
 github.com/mattn/go-runewidth v0.0.15 h1:UNAjwbU9l54TA3KzvqLGxwWjHmMgBUVhBiTjelZgg3U=
 github.com/mattn/go-runewidth v0.0.15/go.mod h1:Jdepj2loyihRzMpdS35Xk/zdY8IAYHsh153qUoGf23w=
 github.com/mattn/go-sqlite3 v1.14.18 h1:JL0eqdCOq6DJVNPSvArO/bIV9/P7fbGrV00LZHc+5aI=
 github.com/mattn/go-sqlite3 v1.14.18/go.mod h1:2eHXhiwb8IkHr+BDWZGa96P6+rkvnG63S2DGjv9HUNg=
+github.com/muesli/ansi v0.0.0-20211018074035-2e021307bc4b h1:1XF24mVaiu7u+CFywTdcDo2ie1pzzhwjt6RHqzpMU34=
+github.com/muesli/ansi v0.0.0-20211018074035-2e021307bc4b/go.mod h1:fQuZ0gauxyBcmsdE3ZT4NasjaRdxmbCS0jRHsrWu3Ho=
+github.com/muesli/cancelreader v0.2.2 h1:3I4Kt4BQjOR54NavqnDogx/MIoWBFa0StPA8ELUXHmA=
+github.com/muesli/cancelreader v0.2.2/go.mod h1:3XuTXfFS2VjM+HTLZY9Ak0l6eUKfijIfMUZ4EgX0QYo=
 github.com/muesli/reflow v0.3.0 h1:IFsN6K9NfGtjeggFP+68I4chLZV2yIKsXJFNZ+eWh6s=
 github.com/muesli/reflow v0.3.0/go.mod h1:pbwTDkVPibjO2kyvBQRBxTWEEGDGq0FlB1BIKtnHY/8=
 github.com/muesli/termenv v0.15.2 h1:GohcuySI0QmI3wN8Ok9PtKGkgkFIk7y6Vpb5PvrY+Wo=
@@ -55,9 +69,16 @@ github.com/spf13/pflag v1.0.5 h1:iy+VFUOCP1a+8yFto/drg2CJ5u0yRoB7fZw3DKv/JXA=
 github.com/spf13/pflag v1.0.5/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An2Bg=
 github.com/sqids/sqids-go v0.4.1 h1:eQKYzmAZbLlRwHeHYPF35QhgxwZHLnlmVj9AkIj/rrw=
 github.com/sqids/sqids-go v0.4.1/go.mod h1:EMwHuPQgSNFS0A49jESTfIQS+066XQTVhukrzEPScl8=
+golang.org/x/sync v0.1.0 h1:wsuoTGHzEhffawBOhz5CYhcrV4IdKZbEyZjBMuTp12o=
+golang.org/x/sync v0.1.0/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sys v0.1.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.14.0 h1:Vz7Qs629MkJkGyHxUlRHizWJRG2j8fbQKjELVSNhy7Q=
 golang.org/x/sys v0.14.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/term v0.6.0 h1:clScbb1cHjoCkyRbWwBEUZ5H/tIFu5TAXIqaZD0Gcjw=
+golang.org/x/term v0.6.0/go.mod h1:m6U89DPEgQRMq3DNkDClhWw02AUbt2daBVO4cn4Hv9U=
+golang.org/x/text v0.3.8 h1:nAL+RVCQ9uMn3vJZbV+MRnydTJFPf8qqY42YiA6MrqY=
+golang.org/x/text v0.3.8/go.mod h1:E6s5w1FMmriuDzIBO73fBruAKo1PCIq6d2Q6DHfQ8WQ=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15 h1:YR8cESwS4TdDjEe65xsg0ogRM/Nc3DYOhEAlW+xobZo=
 gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=

pkg/cmd/chat.go

@@ -0,0 +1,37 @@
+package cmd
+
+import (
+	"fmt"
+
+	"git.mlow.ca/mlow/lmcli/pkg/lmcli"
+	"git.mlow.ca/mlow/lmcli/pkg/tui"
+	"github.com/spf13/cobra"
+)
+
+func ChatCmd(ctx *lmcli.Context) *cobra.Command {
+	cmd := &cobra.Command{
+		Use:   "chat [conversation]",
+		Short: "Open the chat interface",
+		Long:  `Open the chat interface, optionally on a given conversation.`,
+		RunE: func(cmd *cobra.Command, args []string) error {
+			// TODO: implement jump-to-conversation logic
+			shortname := ""
+			if len(args) == 1 {
+				shortname = args[0]
+			}
+			err := tui.Launch(ctx, shortname)
+			if err != nil {
+				return fmt.Errorf("Error fetching LLM response: %v", err)
+			}
+			return nil
+		},
+		ValidArgsFunction: func(cmd *cobra.Command, args []string, toComplete string) ([]string, cobra.ShellCompDirective) {
+			compMode := cobra.ShellCompDirectiveNoFileComp
+			if len(args) != 0 {
+				return nil, compMode
+			}
+			return ctx.Store.ConversationShortNameCompletions(toComplete), compMode
+		},
+	}
+	return cmd
+}

pkg/cmd/cmd.go

@@ -23,6 +23,7 @@ func RootCmd(ctx *lmcli.Context) *cobra.Command {
 		},
 	}
 
+	chatCmd := ChatCmd(ctx)
 	continueCmd := ContinueCmd(ctx)
 	cloneCmd := CloneCmd(ctx)
 	editCmd := EditCmd(ctx)
@@ -48,6 +49,7 @@ func RootCmd(ctx *lmcli.Context) *cobra.Command {
 	}
 
 	root.AddCommand(
+		chatCmd,
 		cloneCmd,
 		continueCmd,
 		editCmd,

pkg/lmcli/store.go

@@ -5,6 +5,7 @@ import (
 	"errors"
 	"fmt"
 	"strings"
+	"time"
 
 	"git.mlow.ca/mlow/lmcli/pkg/lmcli/model"
 	sqids "github.com/sqids/sqids-go"
@@ -26,6 +27,7 @@ type ConversationStore interface {
 	SaveMessage(message *model.Message) error
 	DeleteMessage(message *model.Message) error
 	UpdateMessage(message *model.Message) error
+	AddReply(conversation *model.Conversation, message model.Message) (*model.Message, error)
 }
 
 type SQLStore struct {
@@ -119,3 +121,12 @@ func (s *SQLStore) LastMessage(conversation *model.Conversation) (*model.Message
 	err := s.db.Where("conversation_id = ?", conversation.ID).Last(&message).Error
 	return &message, err
 }
+
+// AddReply adds the given messages as a reply to the given conversation, can be
+// used to easily copy a message associated with one conversation, to another
+func (s *SQLStore) AddReply(c *model.Conversation, m model.Message) (*model.Message, error) {
+	m.ConversationID = c.ID
+	m.ID = 0
+	m.CreatedAt = time.Time{}
+	return &m, s.SaveMessage(&m)
+}

pkg/lmcli/tools/tools.go

@@ -2,7 +2,6 @@ package tools
 
 import (
 	"fmt"
-	"os"
 
 	"git.mlow.ca/mlow/lmcli/pkg/lmcli/model"
 )
@@ -29,9 +28,6 @@ func ExecuteToolCalls(toolCalls []model.ToolCall, toolBag []model.Tool) ([]model
 			return nil, fmt.Errorf("Requested tool '%s' does not exist. Hallucination?", toolCall.Name)
 		}
 
-		// TODO: ability to silence this
-		fmt.Fprintf(os.Stderr, "\nINFO: Executing tool '%s' with args %s\n", toolCall.Name, toolCall.Parameters)
-
 		// Execute the tool
 		result, err := tool.Impl(tool, toolCall.Parameters)
 		if err != nil {

pkg/tui/tui.go

@@ -0,0 +1,679 @@
+package tui
+
+// The terminal UI for lmcli, launched from the `lmcli chat` command
+// TODO:
+// - binding to open selected message/input in $EDITOR
+// - ability to continue or retry previous response
+// - conversation list view
+// - change model
+// - rename conversation
+// - set system prompt
+// - system prompt library?
+
+import (
+	"context"
+	"fmt"
+	"strings"
+	"time"
+
+	cmdutil "git.mlow.ca/mlow/lmcli/pkg/cmd/util"
+	"git.mlow.ca/mlow/lmcli/pkg/lmcli"
+	models "git.mlow.ca/mlow/lmcli/pkg/lmcli/model"
+	"github.com/charmbracelet/bubbles/spinner"
+	"github.com/charmbracelet/bubbles/textarea"
+	"github.com/charmbracelet/bubbles/viewport"
+	tea "github.com/charmbracelet/bubbletea"
+	"github.com/charmbracelet/lipgloss"
+)
+
+type focusState int
+
+const (
+	focusInput focusState = iota
+	focusMessages
+)
+
+type model struct {
+	width  int
+	height int
+
+	ctx           *lmcli.Context
+	convShortname string
+
+	// application state
+	conversation    *models.Conversation
+	messages        []models.Message
+	waitingForReply bool
+	replyChan       chan models.Message
+	replyChunkChan  chan string
+	replyCancelFunc context.CancelFunc
+	err             error
+	persistence     bool // whether we will save new messages in the conversation
+
+	// ui state
+	focus          focusState
+	status         string   // a general status message
+	highlightCache []string // a cache of syntax highlighted message content
+
+	// ui elements
+	content viewport.Model
+	input   textarea.Model
+	spinner spinner.Model
+}
+
+type message struct {
+	role    string
+	content string
+}
+
+// custom tea.Msg types
+type (
+	// sent on each chunk received from LLM
+	msgResponseChunk string
+	// sent when response is finished being received
+	msgResponseEnd string
+	// a special case of msgError that stops the response waiting animation
+	msgResponseError error
+	// sent on each completed reply
+	msgAssistantReply models.Message
+	// sent when a conversation is (re)loaded
+	msgConversationLoaded *models.Conversation
+	// sent when a new conversation title is set
+	msgConversationTitleChanged string
+	// send when a conversation's messages are laoded
+	msgMessagesLoaded []models.Message
+	// sent when an error occurs
+	msgError error
+)
+
+// styles
+var (
+	userStyle      = lipgloss.NewStyle().Faint(true).Bold(true).Foreground(lipgloss.Color("10"))
+	assistantStyle = lipgloss.NewStyle().Faint(true).Bold(true).Foreground(lipgloss.Color("12"))
+	messageStyle   = lipgloss.NewStyle().PaddingLeft(1)
+	headerStyle    = lipgloss.NewStyle().
+			Background(lipgloss.Color("0"))
+	contentStyle = lipgloss.NewStyle().
+			Padding(1)
+	footerStyle = lipgloss.NewStyle().
+			BorderTop(true).
+			BorderStyle(lipgloss.NormalBorder())
+)
+
+func (m model) Init() tea.Cmd {
+	return tea.Batch(
+		textarea.Blink,
+		m.spinner.Tick,
+		m.loadConversation(m.convShortname),
+		m.waitForChunk(),
+		m.waitForReply(),
+	)
+}
+
+func wrapError(err error) tea.Cmd {
+	return func() tea.Msg {
+		return msgError(err)
+	}
+}
+
+func (m model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
+	var cmds []tea.Cmd
+
+	switch msg := msg.(type) {
+	case tea.KeyMsg:
+		switch msg.String() {
+		case "ctrl+c":
+			if m.waitingForReply {
+				m.replyCancelFunc()
+			} else {
+				return m, tea.Quit
+			}
+		case "ctrl+p":
+			m.persistence = !m.persistence
+		case "q":
+			if m.focus != focusInput {
+				return m, tea.Quit
+			}
+		default:
+			var inputHandled tea.Cmd
+			switch m.focus {
+			case focusInput:
+				inputHandled = m.handleInputKey(msg)
+			case focusMessages:
+				inputHandled = m.handleMessagesKey(msg)
+			}
+			if inputHandled != nil {
+				return m, inputHandled
+			}
+		}
+	case tea.WindowSizeMsg:
+		m.width = msg.Width
+		m.height = msg.Height
+		m.content.Width = msg.Width
+		m.content.Height = msg.Height - m.getFixedComponentHeight()
+		m.input.SetWidth(msg.Width - 1)
+		m.updateContent()
+	case msgConversationLoaded:
+		m.conversation = (*models.Conversation)(msg)
+		cmds = append(cmds, m.loadMessages(m.conversation))
+	case msgMessagesLoaded:
+		m.setMessages(msg)
+		m.updateContent()
+	case msgResponseChunk:
+		chunk := string(msg)
+		last := len(m.messages) - 1
+		if last >= 0 && m.messages[last].Role == models.MessageRoleAssistant {
+			m.setMessageContents(last, m.messages[last].Content+chunk)
+		} else {
+			m.addMessage(models.Message{
+				Role:    models.MessageRoleAssistant,
+				Content: chunk,
+			})
+		}
+		m.updateContent()
+		cmds = append(cmds, m.waitForChunk()) // wait for the next chunk
+	case msgAssistantReply:
+		// the last reply that was being worked on is finished
+		reply := models.Message(msg)
+		last := len(m.messages) - 1
+		if last < 0 {
+			panic("Unexpected messages length handling msgReply")
+		}
+		if reply.Role == models.MessageRoleToolCall && m.messages[last].Role == models.MessageRoleAssistant {
+			m.setMessage(last, reply)
+		} else if reply.Role != models.MessageRoleAssistant {
+			m.addMessage(reply)
+		}
+
+		if m.persistence {
+			var err error
+			if m.conversation.ID == 0 {
+				err = m.ctx.Store.SaveConversation(m.conversation)
+			}
+			if err != nil {
+				cmds = append(cmds, wrapError(err))
+			} else {
+				cmds = append(cmds, m.persistRecentMessages())
+			}
+		}
+
+		if m.conversation.Title == "" {
+			cmds = append(cmds, m.generateConversationTitle())
+		}
+
+		m.updateContent()
+		cmds = append(cmds, m.waitForReply())
+	case msgResponseEnd:
+		m.replyCancelFunc = nil
+		m.waitingForReply = false
+		m.status = "Press ctrl+s to send"
+	case msgResponseError:
+		m.replyCancelFunc = nil
+		m.waitingForReply = false
+		m.status = "Press ctrl+s to send"
+		m.err = error(msg)
+	case msgConversationTitleChanged:
+		title := string(msg)
+		m.conversation.Title = title
+		if m.persistence {
+			err := m.ctx.Store.SaveConversation(m.conversation)
+			if err != nil {
+				cmds = append(cmds, wrapError(err))
+			}
+		}
+	case msgError:
+		m.err = error(msg)
+	}
+
+
+	var cmd tea.Cmd
+	m.spinner, cmd = m.spinner.Update(msg)
+	if cmd != nil {
+		cmds = append(cmds, cmd)
+	}
+
+	inputCaptured := false
+	m.input, cmd = m.input.Update(msg)
+	if cmd != nil {
+		inputCaptured = true
+		cmds = append(cmds, cmd)
+	}
+
+	if !inputCaptured {
+		m.content, cmd = m.content.Update(msg)
+		if cmd != nil {
+			cmds = append(cmds, cmd)
+		}
+	}
+
+	return m, tea.Batch(cmds...)
+}
+
+func (m model) View() string {
+	if m.content.Width == 0 {
+		// this is the case upon initial startup, but it's also a safe bet that
+		// we can just skip rendering if the terminal is really 0 width...
+		// without this, the below view functions may do weird things
+		return ""
+	}
+
+	m.content.Height = m.height - m.getFixedComponentHeight()
+
+	sections := make([]string, 0, 6)
+	error := m.errorView()
+	scrollbar := m.scrollbarView()
+	sections = append(sections, m.headerView())
+	if scrollbar != "" {
+		sections = append(sections, scrollbar)
+	}
+	sections = append(sections, m.contentView())
+	if error != "" {
+		sections = append(sections, error)
+	}
+	sections = append(sections, m.inputView())
+	sections = append(sections, m.footerView())
+
+	return lipgloss.JoinVertical(
+		lipgloss.Left,
+		sections...,
+	)
+}
+
+func (m *model) getFixedComponentHeight() int {
+	h := 0
+	h += m.input.Height()
+	h += lipgloss.Height(m.headerView())
+	h += lipgloss.Height(m.footerView())
+	scrollbar := m.scrollbarView()
+	if scrollbar != "" {
+		h += lipgloss.Height(scrollbar)
+	}
+	errorView := m.errorView()
+	if errorView != "" {
+		h += lipgloss.Height(errorView)
+	}
+	return h
+}
+
+func (m *model) headerView() string {
+	titleStyle := lipgloss.NewStyle().
+		PaddingLeft(1).
+		PaddingRight(1).
+		Bold(true)
+	var title string
+	if m.conversation != nil && m.conversation.Title != "" {
+		title = m.conversation.Title
+	} else {
+		title = "Untitled"
+	}
+	part := titleStyle.Render(title)
+
+	return headerStyle.Width(m.width).Render(part)
+}
+
+func (m *model) contentView() string {
+	return m.content.View()
+}
+
+func (m *model) errorView() string {
+	if m.err == nil {
+		return ""
+	}
+	return lipgloss.NewStyle().
+		Width(m.width).
+		AlignHorizontal(lipgloss.Center).
+		Bold(true).
+		Foreground(lipgloss.Color("1")).
+		Render(fmt.Sprintf("%s", m.err))
+}
+
+func (m *model) scrollbarView() string {
+	if m.content.AtTop() {
+		return ""
+	}
+
+	count := int(m.content.ScrollPercent() * float64(m.width-2))
+	fill := strings.Repeat("-", count)
+	return lipgloss.NewStyle().
+		Width(m.width).
+		PaddingLeft(1).
+		PaddingRight(1).
+		Render(fill)
+}
+
+func (m *model) inputView() string {
+	return m.input.View()
+}
+
+func (m *model) footerView() string {
+	segmentStyle := lipgloss.NewStyle().PaddingLeft(1).PaddingRight(1).Faint(true)
+	segmentSeparator := "|"
+
+	saving := ""
+	if m.persistence {
+		saving = segmentStyle.Copy().Bold(true).Foreground(lipgloss.Color("2")).Render("✅💾")
+	} else {
+		saving = segmentStyle.Copy().Bold(true).Foreground(lipgloss.Color("1")).Render("❌💾")
+	}
+
+	status := m.status
+	if m.waitingForReply {
+		status += m.spinner.View()
+	}
+
+	leftSegments := []string{
+		saving,
+		segmentStyle.Render(status),
+	}
+	rightSegments := []string{
+		segmentStyle.Render(fmt.Sprintf("Model: %s", *m.ctx.Config.Defaults.Model)),
+	}
+
+	left := strings.Join(leftSegments, segmentSeparator)
+	right := strings.Join(rightSegments, segmentSeparator)
+
+	totalWidth := lipgloss.Width(left) + lipgloss.Width(right)
+	remaining := m.width - totalWidth
+
+	var padding string
+	if remaining > 0 {
+		padding = strings.Repeat(" ", remaining)
+	}
+
+	footer := left + padding + right
+	if remaining < 0 {
+		ellipses := "... "
+		footer = footer[:m.width-len(ellipses)] + ellipses
+	}
+	return footerStyle.Render(footer)
+}
+
+func initialModel(ctx *lmcli.Context, convShortname string) model {
+	m := model{
+		ctx:           ctx,
+		convShortname: convShortname,
+		conversation:  &models.Conversation{},
+		persistence:   true,
+
+		replyChan:      make(chan models.Message),
+		replyChunkChan: make(chan string),
+	}
+
+	m.content = viewport.New(0, 0)
+
+	m.input = textarea.New()
+	m.input.Placeholder = "Enter a message"
+
+	m.input.FocusedStyle.CursorLine = lipgloss.NewStyle()
+	m.input.ShowLineNumbers = false
+	m.input.SetHeight(4)
+	m.input.Focus()
+
+	m.spinner = spinner.New(spinner.WithSpinner(
+		spinner.Spinner{
+			Frames: []string{
+				".  ",
+				".. ",
+				"...",
+				".. ",
+				".  ",
+				"   ",
+			},
+			FPS: time.Second / 3,
+		},
+	))
+
+	m.waitingForReply = false
+	m.status = "Press ctrl+s to send"
+	return m
+}
+
+func (m *model) handleMessagesKey(msg tea.KeyMsg) tea.Cmd {
+	switch msg.String() {
+	case "tab":
+		m.focus = focusInput
+		m.input.Focus()
+	}
+	return nil
+}
+
+func (m *model) handleInputKey(msg tea.KeyMsg) tea.Cmd {
+	switch msg.String() {
+	case "esc":
+		m.focus = focusMessages
+		m.input.Blur()
+	case "ctrl+s":
+		userInput := strings.TrimSpace(m.input.Value())
+		if strings.TrimSpace(userInput) == "" {
+			return nil
+		}
+
+		reply := models.Message{
+			Role:    models.MessageRoleUser,
+			Content: userInput,
+		}
+
+		if m.persistence {
+			var err error
+			if m.conversation.ID == 0 {
+				err = m.ctx.Store.SaveConversation(m.conversation)
+			}
+			if err != nil {
+				return wrapError(err)
+			}
+
+			// ensure all messages up to the one we're about to add are
+			// persistent
+			cmd := m.persistRecentMessages()
+			if cmd != nil {
+				return cmd
+			}
+			// persist our new message, returning with any possible errors
+			savedReply, err := m.ctx.Store.AddReply(m.conversation, reply)
+			if err != nil {
+				return wrapError(err)
+			}
+			reply = *savedReply
+		}
+
+		m.input.SetValue("")
+		m.addMessage(reply)
+
+		m.updateContent()
+		m.content.GotoBottom()
+
+		m.waitingForReply = true
+		m.status = "Press ctrl+c to cancel"
+		return m.promptLLM()
+	}
+	return nil
+}
+
+func (m *model) loadConversation(shortname string) tea.Cmd {
+	return func() tea.Msg {
+		if shortname == "" {
+			return nil
+		}
+		c, err := m.ctx.Store.ConversationByShortName(shortname)
+		if err != nil {
+			return msgError(fmt.Errorf("Could not lookup conversation: %v", err))
+		}
+		if c.ID == 0 {
+			return msgError(fmt.Errorf("Conversation not found: %s", shortname))
+		}
+		return msgConversationLoaded(c)
+	}
+}
+
+func (m *model) loadMessages(c *models.Conversation) tea.Cmd {
+	return func() tea.Msg {
+		messages, err := m.ctx.Store.Messages(c)
+		if err != nil {
+			return msgError(fmt.Errorf("Could not load conversation messages: %v\n", err))
+		}
+		return msgMessagesLoaded(messages)
+	}
+}
+
+func (m *model) waitForReply() tea.Cmd {
+	return func() tea.Msg {
+		return msgAssistantReply(<-m.replyChan)
+	}
+}
+
+func (m *model) waitForChunk() tea.Cmd {
+	return func() tea.Msg {
+		return msgResponseChunk(<-m.replyChunkChan)
+	}
+}
+
+func (m *model) generateConversationTitle() tea.Cmd {
+	return func() tea.Msg {
+		title, err := cmdutil.GenerateTitle(m.ctx, m.conversation)
+		if err != nil {
+			return msgError(err)
+		}
+		return msgConversationTitleChanged(title)
+	}
+}
+
+func (m *model) promptLLM() tea.Cmd {
+	return func() tea.Msg {
+		completionProvider, err := m.ctx.GetCompletionProvider(*m.ctx.Config.Defaults.Model)
+		if err != nil {
+			return msgError(err)
+		}
+
+		requestParams := models.RequestParameters{
+			Model:       *m.ctx.Config.Defaults.Model,
+			MaxTokens:   *m.ctx.Config.Defaults.MaxTokens,
+			Temperature: *m.ctx.Config.Defaults.Temperature,
+			ToolBag:     m.ctx.EnabledTools,
+		}
+
+		replyHandler := func(msg models.Message) {
+			m.replyChan <- msg
+		}
+
+		ctx, replyCancelFunc := context.WithCancel(context.Background())
+		m.replyCancelFunc = replyCancelFunc
+
+		resp, err := completionProvider.CreateChatCompletionStream(
+			ctx, requestParams, m.messages, replyHandler, m.replyChunkChan,
+		)
+
+		if err != nil {
+			return msgResponseError(err)
+		}
+		return msgResponseEnd(resp)
+	}
+}
+
+func (m *model) persistRecentMessages() tea.Cmd {
+	for i, msg := range m.messages {
+		if msg.ID > 0 {
+			continue
+		}
+		newMessage, err := m.ctx.Store.AddReply(m.conversation, msg)
+		if err != nil {
+			return wrapError(err)
+		}
+		m.setMessage(i, *newMessage)
+	}
+	return nil
+}
+
+func (m *model) setMessages(messages []models.Message) {
+	m.messages = messages
+	m.highlightCache = make([]string, len(messages))
+	for i, msg := range m.messages {
+		highlighted, _ := m.ctx.Chroma.HighlightS(msg.Content)
+		m.highlightCache[i] = highlighted
+	}
+}
+
+func (m *model) setMessage(i int, msg models.Message) {
+	if i >= len(m.messages) {
+		panic("i out of range")
+	}
+	highlighted, _ := m.ctx.Chroma.HighlightS(msg.Content)
+	m.messages[i] = msg
+	m.highlightCache[i] = highlighted
+}
+
+func (m *model) addMessage(msg models.Message) {
+	highlighted, _ := m.ctx.Chroma.HighlightS(msg.Content)
+	m.messages = append(m.messages, msg)
+	m.highlightCache = append(m.highlightCache, highlighted)
+}
+
+func (m *model) setMessageContents(i int, content string) {
+	if i >= len(m.messages) {
+		panic("i out of range")
+	}
+	highlighted, _ := m.ctx.Chroma.HighlightS(content)
+	m.messages[i].Content = content
+	m.highlightCache[i] = highlighted
+}
+
+// render the conversation into the main viewport
+func (m *model) updateContent() {
+	sb := strings.Builder{}
+	msgCnt := len(m.messages)
+	for i, message := range m.messages {
+		icon := "⚙️"
+		friendly := message.Role.FriendlyRole()
+		style := lipgloss.NewStyle().Bold(true).Faint(true)
+
+		switch message.Role {
+		case models.MessageRoleUser:
+			icon = ""
+			style = userStyle
+		case models.MessageRoleAssistant:
+			icon = ""
+			style = assistantStyle
+		case models.MessageRoleToolCall:
+		case models.MessageRoleToolResult:
+			icon = "🔧"
+		}
+
+		var saved string
+		if message.ID == 0 {
+			saved = lipgloss.NewStyle().Faint(true).Render(" (not saved)")
+		}
+
+		// write message heading with space for content
+		header := fmt.Sprintf("%s\n\n", style.Render(icon+friendly)+saved)
+		sb.WriteString(header)
+
+		// TODO: special rendering for tool calls/results?
+
+		// write message contents
+		var highlighted string
+		if m.highlightCache[i] == "" {
+			highlighted = message.Content
+		} else {
+			highlighted = m.highlightCache[i]
+		}
+		contents := messageStyle.Width(m.content.Width - 5).Render(highlighted)
+		sb.WriteString(contents)
+
+		if i < msgCnt-1 {
+			sb.WriteString("\n\n")
+		}
+	}
+	atBottom := m.content.AtBottom()
+	m.content.SetContent(contentStyle.Render(sb.String()))
+	if atBottom {
+		// if we were at bottom before the update, scroll with the output
+		m.content.GotoBottom()
+	}
+}
+
+func Launch(ctx *lmcli.Context, convShortname string) error {
+	p := tea.NewProgram(initialModel(ctx, convShortname), tea.WithAltScreen())
+	if _, err := p.Run(); err != nil {
+		return fmt.Errorf("Error running program: %v", err)
+	}
+	return nil
+}