refactor(chat): deduplicate streaming code, add multi-conv, and XSS protection

- Add ChatEngine for deduplicated chat logic (handlers_chat/shell_chat)
- Add SendWithToolsStream for real-time streaming responses
- Add /help, /plan, /export, /model commands in Studio
- Fix XSS: sanitize HTML after markdown rendering
- Add ConversationStoreMulti for multi-conversation support
- Add Anthropic headers (x-api-key, anthropic-version)
- Add fallback logging when provider switch occurs
- Add API handler tests (handlers_test.go)
- Polish Studio: max-height 200px, word-break on tool args
- Update CLI version to show full info (version, go, platform)

🤖 Generated with Crush

Assisted-by: MiniMax-M2.5 via Crush <crush@charm.land>

cmd/muyue/commands/version.go

@@ -9,7 +9,7 @@ import (
 
 var versionCmd = &cobra.Command{
 	Use:   "version",
-	Short: "Print version",
+	Short: "Print version info",
 	RunE:  runVersion,
 }
 
@@ -18,6 +18,6 @@ func init() {
 }
 
 func runVersion(cmd *cobra.Command, args []string) error {
-	fmt.Printf("Muyue version %s\n", version.Version)
+	fmt.Print(version.FullInfo())
 	return nil
 }

go.mod

@@ -7,6 +7,7 @@ toolchain go1.24.3
 require (
 	github.com/charmbracelet/huh v1.0.0
 	github.com/creack/pty/v2 v2.0.1
+	github.com/google/uuid v1.6.0
 	github.com/gorilla/websocket v1.5.3
 	github.com/spf13/cobra v1.10.2
 	gopkg.in/yaml.v3 v3.0.1

go.sum

@@ -51,6 +51,8 @@ github.com/dustin/go-humanize v1.0.1 h1:GzkhY7T5VNhEkwH0PVJgjz+fX1rhBrR7pRT3mDkp
 github.com/dustin/go-humanize v1.0.1/go.mod h1:Mu1zIs6XwVuF/gI1OepvI0qD18qycQx+mFykh5fBlto=
 github.com/erikgeiser/coninput v0.0.0-20211004153227-1c3628e74d0f h1:Y/CXytFA4m6baUTXGLOoWe4PQhGxaX0KpnayAqC48p4=
 github.com/erikgeiser/coninput v0.0.0-20211004153227-1c3628e74d0f/go.mod h1:vw97MGsxSvLiUE2X8qFplwetxpGLQrlU1Q9AUEIzCaM=
+github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
+github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
 github.com/gorilla/websocket v1.5.3 h1:saDtZ6Pbx/0u+bgYQ3q96pZgCzfhKXGPqt7kZ72aNNg=
 github.com/gorilla/websocket v1.5.3/go.mod h1:YR8l580nyteQvAITg2hZ9XVh4b55+EU/adAjf1fMHhE=
 github.com/inconshreveable/mousetrap v1.1.0 h1:wN+x4NVGpMsO7ErUn/mUI3vEoE6Jt13X2s0bqwp9tc8=

internal/api/chat_engine.go

@@ -0,0 +1,249 @@
+package api
+
+import (
+	"context"
+	"encoding/json"
+	"net/http"
+	"strings"
+
+	"github.com/muyue/muyue/internal/agent"
+	"github.com/muyue/muyue/internal/orchestrator"
+)
+
+const (
+	MaxToolIterations = 15
+)
+
+// ChatEngine handles chat interactions with tool execution.
+// This deduplicates chat logic previously repeated in handlers_chat.go and handlers_shell_chat.go.
+type ChatEngine struct {
+	orchestrator *orchestrator.Orchestrator
+	registry   *agent.Registry
+	tools      json.RawMessage
+	onChunk    func(map[string]interface{})
+	stream    bool
+}
+
+// NewChatEngine creates a new ChatEngine instance.
+func NewChatEngine(orb *orchestrator.Orchestrator, registry *agent.Registry, tools json.RawMessage) *ChatEngine {
+	return &ChatEngine{
+		orchestrator: orb,
+		registry:     registry,
+		tools:        tools,
+		stream:      false,
+	}
+}
+
+// SetStream enables streaming mode for the chat engine.
+func (ce *ChatEngine) SetStream(enabled bool) {
+	ce.stream = enabled
+}
+
+// OnChunk sets the callback for SSE chunk writing.
+func (ce *ChatEngine) OnChunk(fn func(map[string]interface{})) {
+	ce.onChunk = fn
+}
+
+// RunWithTools executes the chat loop with tool calls.
+// Returns final content, tool calls, tool results, and error.
+func (ce *ChatEngine) RunWithTools(ctx context.Context, messages []orchestrator.Message) (string, []map[string]interface{}, []map[string]interface{}, error) {
+	var finalContent string
+	var allToolCalls []map[string]interface{}
+	var allToolResults []map[string]interface{}
+
+	for i := 0; i < MaxToolIterations; i++ {
+		var resp *orchestrator.ChatResponse
+		var err error
+
+		if ce.stream {
+			// Use streaming version
+			resp, err = ce.orchestrator.SendWithToolsStream(messages, func(content string, toolCalls []orchestrator.ToolCallMsg) {
+				if ce.onChunk != nil && content != "" {
+					ce.onChunk(map[string]interface{}{"content": content})
+				}
+			})
+		} else {
+			resp, err = ce.orchestrator.SendWithTools(messages)
+		}
+		if err != nil {
+			if ce.onChunk != nil {
+				ce.onChunk(map[string]interface{}{"error": err.Error()})
+			}
+			return finalContent, allToolCalls, allToolResults, err
+		}
+
+		choice := resp.Choices[0]
+		content := cleanThinkingTags(choice.Message.Content)
+
+		if content != "" {
+			words := strings.Fields(content)
+			for _, w := range words {
+				chunk := w
+				if ce.onChunk != nil {
+					ce.onChunk(map[string]interface{}{"content": chunk})
+				}
+			}
+			finalContent = content
+		}
+
+		if len(choice.Message.ToolCalls) == 0 {
+			break
+		}
+
+		assistantMsg := orchestrator.Message{
+			Role:      "assistant",
+			Content:   content,
+			ToolCalls: choice.Message.ToolCalls,
+		}
+		messages = append(messages, assistantMsg)
+
+		for _, tc := range choice.Message.ToolCalls {
+			toolCallData := map[string]interface{}{
+				"tool_call_id": tc.ID,
+				"name":        tc.Function.Name,
+				"args":        tc.Function.Arguments,
+			}
+			allToolCalls = append(allToolCalls, toolCallData)
+
+			if ce.onChunk != nil {
+				ce.onChunk(map[string]interface{}{"tool_call": toolCallData})
+			}
+
+			call := agent.ToolCall{
+				ID:        tc.ID,
+				Name:      tc.Function.Name,
+				Arguments: json.RawMessage(tc.Function.Arguments),
+			}
+
+			result, execErr := ce.registry.Execute(ctx, call)
+			if execErr != nil {
+				result = agent.ToolResponse{
+					Content: execErr.Error(),
+					IsError: true,
+				}
+			}
+
+			resultData := map[string]interface{}{
+				"tool_call_id": tc.ID,
+				"content":     result.Content,
+				"is_error":    result.IsError,
+			}
+			allToolResults = append(allToolResults, map[string]interface{}{
+				"tool_call_id": tc.ID,
+				"name":        tc.Function.Name,
+				"args":        tc.Function.Arguments,
+				"result":      result.Content,
+				"is_error":    result.IsError,
+			})
+
+			if ce.onChunk != nil {
+				ce.onChunk(map[string]interface{}{"tool_result": resultData})
+			}
+
+			messages = append(messages, orchestrator.Message{
+				Role:       "tool",
+				Content:    result.Content,
+				ToolCallID: tc.ID,
+				Name:       tc.Function.Name,
+			})
+		}
+
+		finalContent = ""
+	}
+
+	return finalContent, allToolCalls, allToolResults, nil
+}
+
+// RunNonStream executes chat without streaming content to client.
+func (ce *ChatEngine) RunNonStream(ctx context.Context, messages []orchestrator.Message) (string, error) {
+	var finalContent string
+
+	for i := 0; i < MaxToolIterations; i++ {
+		resp, err := ce.orchestrator.SendWithTools(messages)
+		if err != nil {
+			return finalContent, err
+		}
+
+		choice := resp.Choices[0]
+		content := cleanThinkingTags(choice.Message.Content)
+
+		if content != "" {
+			finalContent = content
+		}
+
+		if len(choice.Message.ToolCalls) == 0 {
+			break
+		}
+
+		assistantMsg := orchestrator.Message{
+			Role:      "assistant",
+			Content:   content,
+			ToolCalls: choice.Message.ToolCalls,
+		}
+		messages = append(messages, assistantMsg)
+
+		for _, tc := range choice.Message.ToolCalls {
+			call := agent.ToolCall{
+				ID:        tc.ID,
+				Name:      tc.Function.Name,
+				Arguments: json.RawMessage(tc.Function.Arguments),
+			}
+
+			result, execErr := ce.registry.Execute(ctx, call)
+			if execErr != nil {
+				result = agent.ToolResponse{
+					Content: execErr.Error(),
+					IsError: true,
+				}
+			}
+
+			messages = append(messages, orchestrator.Message{
+				Role:       "tool",
+				Content:    result.Content,
+				ToolCallID: tc.ID,
+				Name:       tc.Function.Name,
+			})
+		}
+
+		finalContent = ""
+	}
+
+	if finalContent == "" {
+		finalContent = "(tool calls completed, no text response)"
+	}
+
+	return finalContent, nil
+}
+
+// SSEWriter handles Server-Sent Events writing to HTTP response.
+type SSEWriter struct {
+	w       http.ResponseWriter
+	flusher http.Flusher
+}
+
+// NewSSEWriter creates a new SSEWriter.
+func NewSSEWriter(w http.ResponseWriter) *SSEWriter {
+	sse := &SSEWriter{w: w}
+	if f, ok := w.(http.Flusher); ok {
+		sse.flusher = f
+	}
+	return sse
+}
+
+// Write sends an SSE message.
+func (s *SSEWriter) Write(data map[string]interface{}) {
+	b, _ := json.Marshal(data)
+	s.w.Write([]byte("data: " + string(b) + "\n\n"))
+	if s.flusher != nil {
+		s.flusher.Flush()
+	}
+}
+
+// SetupSSEHeaders sets up SSE response headers.
+func SetupSSEHeaders(w http.ResponseWriter) {
+	w.Header().Set("Content-Type", "text/event-stream")
+	w.Header().Set("Cache-Control", "no-cache")
+	w.Header().Set("Connection", "keep-alive")
+	w.Header().Set("Access-Control-Allow-Origin", "*")
+	w.WriteHeader(http.StatusOK)
+}

internal/api/conversation_multi.go

@@ -0,0 +1,370 @@
+package api
+
+import (
+	"encoding/json"
+	"fmt"
+	"os"
+	"path/filepath"
+	"sync"
+	"time"
+
+	"github.com/google/uuid"
+	"github.com/muyue/muyue/internal/config"
+)
+
+// ConversationMeta represents metadata for a conversation (used for listing).
+type ConversationMeta struct {
+	ID        string    `json:"id"`
+	Title     string    `json:"title"`
+	CreatedAt string    `json:"created_at"`
+	UpdatedAt string    `json:"updated_at"`
+	MessageCount int    `json:"message_count"`
+}
+
+// ConversationStoreMulti manages multiple conversations.
+type ConversationStoreMulti struct {
+	mu         sync.RWMutex
+	dir        string
+	currentID  string
+	conversations map[string]*Conversation
+}
+
+func NewConversationStoreMulti() *ConversationStoreMulti {
+	dir, err := config.ConfigDir()
+	if err != nil {
+		dir = "/tmp/muyue"
+	}
+	dir = filepath.Join(dir, "conversations")
+	
+	cs := &ConversationStoreMulti{
+		dir:        dir,
+		conversations: make(map[string]*Conversation),
+	}
+	cs.loadIndex()
+	return cs
+}
+
+func (cs *ConversationStoreMulti) loadIndex() {
+	os.MkdirAll(cs.dir, 0755)
+	
+	// Load index file if exists
+	indexPath := filepath.Join(cs.dir, "index.json")
+	data, err := os.ReadFile(indexPath)
+	if err != nil {
+		// Create default conversation
+		cs.createDefault()
+		return
+	}
+	
+	var index struct {
+		CurrentID      string             `json:"current_id"`
+		Conversations []ConversationMeta `json:"conversations"`
+	}
+	if err := json.Unmarshal(data, &index); err != nil {
+		cs.createDefault()
+		return
+	}
+	
+	cs.currentID = index.CurrentID
+	if cs.currentID == "" {
+		cs.createDefault()
+		return
+	}
+	
+	// Load all conversations
+	for _, meta := range index.Conversations {
+		convPath := filepath.Join(cs.dir, fmt.Sprintf("conv_%s.json", meta.ID))
+		data, err := os.ReadFile(convPath)
+		if err != nil {
+			continue
+		}
+		var conv Conversation
+		if err := json.Unmarshal(data, &conv); err != nil {
+			continue
+		}
+		cs.conversations[meta.ID] = &conv
+	}
+	
+	// Ensure current conversation exists
+	if _, ok := cs.conversations[cs.currentID]; !ok {
+		cs.createDefault()
+	}
+}
+
+func (cs *ConversationStoreMulti) createDefault() {
+	cs.currentID = uuid.New().String()
+	cs.conversations[cs.currentID] = &Conversation{
+		Messages:  []FeedMessage{},
+		CreatedAt: time.Now().Format(time.RFC3339),
+		UpdatedAt: time.Now().Format(time.RFC3339),
+	}
+	cs.saveIndex()
+}
+
+func (cs *ConversationStoreMulti) saveIndex() error {
+	var metas []ConversationMeta
+	for id, conv := range cs.conversations {
+		title := "Nouvelle conversation"
+		if len(conv.Messages) > 0 {
+			// Use first user message as title
+			for _, m := range conv.Messages {
+				if m.Role == "user" {
+					if len(m.Content) > 50 {
+						title = m.Content[:50] + "..."
+					} else {
+						title = m.Content
+					}
+					break
+				}
+			}
+		}
+		metas = append(metas, ConversationMeta{
+			ID:           id,
+			Title:        title,
+			CreatedAt:    conv.CreatedAt,
+			UpdatedAt:   conv.UpdatedAt,
+			MessageCount: len(conv.Messages),
+		})
+	}
+	
+	index := struct {
+		CurrentID      string             `json:"current_id"`
+		Conversations []ConversationMeta `json:"conversations"`
+	}{
+		CurrentID:      cs.currentID,
+		Conversations: metas,
+	}
+	
+	data, err := json.MarshalIndent(index, "", "  ")
+	if err != nil {
+		return err
+	}
+	
+	return os.WriteFile(filepath.Join(cs.dir, "index.json"), data, 0600)
+}
+
+func (cs *ConversationStoreMulti) saveCurrent() error {
+	conv, ok := cs.conversations[cs.currentID]
+	if !ok {
+		return fmt.Errorf("no current conversation")
+	}
+	
+	conv.UpdatedAt = time.Now().Format(time.RFC3339)
+	data, err := json.MarshalIndent(conv, "", "  ")
+	if err != nil {
+		return err
+	}
+	
+	convPath := filepath.Join(cs.dir, fmt.Sprintf("conv_%s.json", cs.currentID))
+	if err := os.WriteFile(convPath, data, 0600); err != nil {
+		return err
+	}
+	
+	return cs.saveIndex()
+}
+
+// Current returns the current conversation store.
+func (cs *ConversationStoreMulti) Current() *ConversationStore {
+	cs.mu.RLock()
+	defer cs.mu.RUnlock()
+	
+	conv, ok := cs.conversations[cs.currentID]
+	if !ok {
+		return &ConversationStore{
+			conv: &Conversation{
+				Messages:  []FeedMessage{},
+				CreatedAt: time.Now().Format(time.RFC3339),
+				UpdatedAt: time.Now().Format(time.RFC3339),
+			},
+		}
+	}
+	
+	return &ConversationStore{
+		conv: conv,
+	}
+}
+
+// Get returns the current conversation messages.
+func (cs *ConversationStoreMulti) Get() []FeedMessage {
+	cs.mu.RLock()
+	defer cs.mu.RUnlock()
+	
+	conv, ok := cs.conversations[cs.currentID]
+	if !ok {
+		return []FeedMessage{}
+	}
+	
+	out := make([]FeedMessage, len(conv.Messages))
+	copy(out, conv.Messages)
+	return out
+}
+
+// Add adds a message to the current conversation.
+func (cs *ConversationStoreMulti) Add(role, content string) FeedMessage {
+	cs.mu.Lock()
+	defer cs.mu.Unlock()
+	
+	conv, ok := cs.conversations[cs.currentID]
+	if !ok {
+		cs.currentID = uuid.New().String()
+		conv = &Conversation{
+			Messages:  []FeedMessage{},
+			CreatedAt: time.Now().Format(time.RFC3339),
+			UpdatedAt: time.Now().Format(time.RFC3339),
+		}
+		cs.conversations[cs.currentID] = conv
+	}
+	
+	msg := FeedMessage{
+		ID:      generateMsgID(),
+		Role:    role,
+		Content: content,
+		Time:    time.Now().Format(time.RFC3339),
+	}
+	conv.Messages = append(conv.Messages, msg)
+	
+	go cs.saveCurrent() // Fire and forget
+	
+	return msg
+}
+
+// Clear clears the current conversation.
+func (cs *ConversationStoreMulti) Clear() {
+	cs.mu.Lock()
+	defer cs.mu.Unlock()
+	
+	conv, ok := cs.conversations[cs.currentID]
+	if !ok {
+		return
+	}
+	
+	conv.Messages = []FeedMessage{}
+	conv.Summary = ""
+	conv.CreatedAt = time.Now().Format(time.RFC3339)
+	conv.UpdatedAt = time.Now().Format(time.RFC3339)
+	
+	cs.saveCurrent()
+}
+
+// List returns all conversations.
+func (cs *ConversationStoreMulti) List() []ConversationMeta {
+	cs.mu.RLock()
+	defer cs.mu.RUnlock()
+	
+	var metas []ConversationMeta
+	for id, conv := range cs.conversations {
+		title := "Nouvelle conversation"
+		if len(conv.Messages) > 0 {
+			for _, m := range conv.Messages {
+				if m.Role == "user" {
+					if len(m.Content) > 50 {
+						title = m.Content[:50] + "..."
+					} else {
+						title = m.Content
+					}
+					break
+				}
+			}
+		}
+		metas = append(metas, ConversationMeta{
+			ID:           id,
+			Title:        title,
+			CreatedAt:    conv.CreatedAt,
+			UpdatedAt:   conv.UpdatedAt,
+			MessageCount: len(conv.Messages),
+		})
+	}
+	
+	return metas
+}
+
+// Create creates a new conversation and switches to it.
+func (cs *ConversationStoreMulti) Create() string {
+	cs.mu.Lock()
+	defer cs.mu.Unlock()
+	
+	id := uuid.New().String()
+	cs.conversations[id] = &Conversation{
+		Messages:  []FeedMessage{},
+		CreatedAt: time.Now().Format(time.RFC3339),
+		UpdatedAt: time.Now().Format(time.RFC3339),
+	}
+	cs.currentID = id
+	cs.saveIndex()
+	
+	return id
+}
+
+// Switch switches to a different conversation.
+func (cs *ConversationStoreMulti) Switch(id string) error {
+	cs.mu.Lock()
+	defer cs.mu.Unlock()
+	
+	if _, ok := cs.conversations[id]; !ok {
+		return fmt.Errorf("conversation not found: %s", id)
+	}
+	
+	cs.currentID = id
+	cs.saveIndex()
+	
+	return nil
+}
+
+// GetByID returns a conversation by ID.
+func (cs *ConversationStoreMulti) GetByID(id string) (*Conversation, error) {
+	cs.mu.RLock()
+	defer cs.mu.RUnlock()
+	
+	conv, ok := cs.conversations[id]
+	if !ok {
+		return nil, fmt.Errorf("conversation not found: %s", id)
+	}
+	
+	return conv, nil
+}
+
+// Delete deletes a conversation.
+func (cs *ConversationStoreMulti) Delete(id string) error {
+	cs.mu.Lock()
+	defer cs.mu.Unlock()
+	
+	if _, ok := cs.conversations[id]; !ok {
+		return fmt.Errorf("conversation not found: %s", id)
+	}
+	
+	delete(cs.conversations, id)
+	
+	// Delete file
+	convPath := filepath.Join(cs.dir, fmt.Sprintf("conv_%s.json", id))
+	os.Remove(convPath)
+	
+	// If deleted current, switch to another
+	if cs.currentID == id {
+		if len(cs.conversations) > 0 {
+			for newID := range cs.conversations {
+				cs.currentID = newID
+				break
+			}
+		} else {
+			// Create new default
+			cs.currentID = uuid.New().String()
+			cs.conversations[cs.currentID] = &Conversation{
+				Messages:  []FeedMessage{},
+				CreatedAt: time.Now().Format(time.RFC3339),
+				UpdatedAt: time.Now().Format(time.RFC3339),
+			}
+		}
+	}
+	
+	cs.saveIndex()
+	
+	return nil
+}
+
+// CurrentID returns the current conversation ID.
+func (cs *ConversationStoreMulti) CurrentID() string {
+	cs.mu.RLock()
+	defer cs.mu.RUnlock()
+	
+	return cs.currentID
+}

internal/api/handlers_chat.go

@@ -13,8 +13,6 @@ import (
 
 var thinkingTagRegex = regexp.MustCompile(`(?s)<[Tt]hink[^>]*>.*?</[Tt]hink>`)
 
-const maxToolIterations = 15
-
 func (s *Server) handleChat(w http.ResponseWriter, r *http.Request) {
 	if r.Method != "POST" {
 		writeError(w, "POST only", http.StatusMethodNotAllowed)
@@ -55,108 +53,31 @@ func (s *Server) handleChat(w http.ResponseWriter, r *http.Request) {
 }
 
 func (s *Server) handleStreamChat(w http.ResponseWriter, orb *orchestrator.Orchestrator, userMessage string) {
-	w.Header().Set("Content-Type", "text/event-stream")
+	SetupSSEHeaders(w)
-	w.Header().Set("Cache-Control", "no-cache")
-	w.Header().Set("Connection", "keep-alive")
-	w.Header().Set("Access-Control-Allow-Origin", "*")
-	w.WriteHeader(http.StatusOK)
 	flusher, canFlush := w.(http.Flusher)
 
-	writeSSE := func(data map[string]interface{}) {
+
-		b, _ := json.Marshal(data)
+	sseWriter := NewSSEWriter(w)
-		w.Write([]byte("data: " + string(b) + "\n\n"))
+
-		if canFlush {
-			flusher.Flush()
-		}
-	}
 
 	ctx := context.Background()
 	messages := s.buildContextMessages(userMessage)
 
-	var finalContent string
+	engine := NewChatEngine(orb, s.agentRegistry, s.agentToolsJSON)
-	var allToolCalls []map[string]interface{}
+	engine.OnChunk(func(data map[string]interface{}) {
-	var allToolResults []map[string]interface{}
+		if data == nil {
-
-	for i := 0; i < maxToolIterations; i++ {
-		resp, err := orb.SendWithTools(messages)
-		if err != nil {
-			writeSSE(map[string]interface{}{"error": err.Error()})
 			return
 		}
-
+		sseWriter.Write(data)
-		choice := resp.Choices[0]
+		if canFlush {
-		content := cleanThinkingTags(choice.Message.Content)
+			flusher.Flush()
-
-		if content != "" {
-			words := strings.Fields(content)
-			for i, w := range words {
-				chunk := w
-				if i < len(words)-1 {
-					chunk += " "
 		}
-				writeSSE(map[string]interface{}{"content": chunk})
-			}
-			finalContent = content
-		}
-
-		if len(choice.Message.ToolCalls) == 0 {
-			break
-		}
-
-		assistantMsg := orchestrator.Message{
-			Role:      "assistant",
-			Content:   content,
-			ToolCalls: choice.Message.ToolCalls,
-		}
-		messages = append(messages, assistantMsg)
-
-		for _, tc := range choice.Message.ToolCalls {
-			toolCallData := map[string]interface{}{
-				"tool_call_id": tc.ID,
-				"name":         tc.Function.Name,
-				"args":         tc.Function.Arguments,
-			}
-			allToolCalls = append(allToolCalls, toolCallData)
-			writeSSE(map[string]interface{}{"tool_call": toolCallData})
-
-			call := agent.ToolCall{
-				ID:        tc.ID,
-				Name:      tc.Function.Name,
-				Arguments: json.RawMessage(tc.Function.Arguments),
-			}
-
-			result, execErr := s.agentRegistry.Execute(ctx, call)
-			if execErr != nil {
-				result = agent.ToolResponse{
-					Content: execErr.Error(),
-					IsError: true,
-				}
-			}
-
-			resultData := map[string]interface{}{
-				"tool_call_id": tc.ID,
-				"content":      result.Content,
-				"is_error":     result.IsError,
-			}
-			writeSSE(map[string]interface{}{"tool_result": resultData})
-
-			allToolResults = append(allToolResults, map[string]interface{}{
-				"tool_call_id": tc.ID,
-				"name":         tc.Function.Name,
-				"args":         tc.Function.Arguments,
-				"result":       result.Content,
-				"is_error":     result.IsError,
 	})
 
-			messages = append(messages, orchestrator.Message{
+	finalContent, allToolCalls, allToolResults, err := engine.RunWithTools(ctx, messages)
-				Role:       "tool",
+	if err != nil {
-				Content:    result.Content,
+		sseWriter.Write(map[string]interface{}{"error": err.Error()})
-				ToolCallID: tc.ID,
+		return
-				Name:       tc.Function.Name,
-			})
-		}
-
-		finalContent = ""
 	}
 
 	storeContent := finalContent
@@ -171,70 +92,20 @@ func (s *Server) handleStreamChat(w http.ResponseWriter, orb *orchestrator.Orche
 	}
 	s.convStore.Add("assistant", storeContent)
 
-	writeSSE(map[string]interface{}{"done": "true"})
+	sseWriter.Write(map[string]interface{}{"done": "true"})
 }
 
 func (s *Server) handleNonStreamChat(w http.ResponseWriter, orb *orchestrator.Orchestrator, userMessage string) {
 	ctx := context.Background()
 	messages := s.buildContextMessages(userMessage)
 
-	var finalContent string
+	engine := NewChatEngine(orb, s.agentRegistry, s.agentToolsJSON)
-
+	finalContent, err := engine.RunNonStream(ctx, messages)
-	for i := 0; i < maxToolIterations; i++ {
-		resp, err := orb.SendWithTools(messages)
 	if err != nil {
 		writeError(w, err.Error(), http.StatusInternalServerError)
 		return
 	}
 
-		choice := resp.Choices[0]
-		content := cleanThinkingTags(choice.Message.Content)
-
-		if content != "" {
-			finalContent = content
-		}
-
-		if len(choice.Message.ToolCalls) == 0 {
-			break
-		}
-
-		assistantMsg := orchestrator.Message{
-			Role:      "assistant",
-			Content:   content,
-			ToolCalls: choice.Message.ToolCalls,
-		}
-		messages = append(messages, assistantMsg)
-
-		for _, tc := range choice.Message.ToolCalls {
-			call := agent.ToolCall{
-				ID:        tc.ID,
-				Name:      tc.Function.Name,
-				Arguments: json.RawMessage(tc.Function.Arguments),
-			}
-
-			result, execErr := s.agentRegistry.Execute(ctx, call)
-			if execErr != nil {
-				result = agent.ToolResponse{
-					Content: execErr.Error(),
-					IsError: true,
-				}
-			}
-
-			messages = append(messages, orchestrator.Message{
-				Role:       "tool",
-				Content:    result.Content,
-				ToolCallID: tc.ID,
-				Name:       tc.Function.Name,
-			})
-		}
-
-		finalContent = ""
-	}
-
-	if finalContent == "" {
-		finalContent = "(tool calls completed, no text response)"
-	}
-
 	s.convStore.Add("assistant", finalContent)
 	writeJSON(w, map[string]string{"content": finalContent})
 }

internal/api/handlers_shell_chat.go

@@ -6,7 +6,6 @@ import (
 	"net/http"
 	"strings"
 
-	"github.com/muyue/muyue/internal/agent"
 	"github.com/muyue/muyue/internal/orchestrator"
 )
 
@@ -35,6 +34,22 @@ type ToolCallInfo struct {
 	Error  string                 `json:"error,omitempty"`
 }
 
+func toString(v interface{}) string {
+	if v == nil {
+		return ""
+	}
+	s, _ := v.(string)
+	return s
+}
+
+func toBool(v interface{}) bool {
+	if v == nil {
+		return false
+	}
+	b, _ := v.(bool)
+	return b
+}
+
 func (s *Server) handleShellChat(w http.ResponseWriter, r *http.Request) {
 	if r.Method != "POST" {
 		writeError(w, "POST only", http.StatusMethodNotAllowed)
@@ -102,109 +117,59 @@ Tu peux appeler des outils pour exécuter des commandes, lire des fichiers, etc.
 }
 
 func (s *Server) handleShellChatStream(w http.ResponseWriter, orb *orchestrator.Orchestrator, req ShellChatRequest) {
-	w.Header().Set("Content-Type", "text/event-stream")
+	SetupSSEHeaders(w)
-	w.Header().Set("Cache-Control", "no-cache")
-	w.Header().Set("Connection", "keep-alive")
-	w.Header().Set("Access-Control-Allow-Origin", "*")
-	w.WriteHeader(http.StatusOK)
 	flusher, canFlush := w.(http.Flusher)
-
+	sseWriter := NewSSEWriter(w)
-	writeSSE := func(data map[string]interface{}) {
-		b, _ := json.Marshal(data)
-		w.Write([]byte("data: " + string(b) + "\n\n"))
-		if canFlush {
-			flusher.Flush()
-		}
-	}
 
 	ctx := context.Background()
 	messages := []orchestrator.Message{
 		{Role: "user", Content: req.Message},
 	}
 
-	var finalContent string
+	engine := NewChatEngine(orb, s.agentRegistry, s.agentToolsJSON)
-	var toolCalls []ToolCallInfo
 
-	for i := 0; i < maxShellToolIterations; i++ {
+	var toolCalls []ToolCallInfo
-		resp, err := orb.SendWithTools(messages)
+	engine.OnChunk(func(data map[string]interface{}) {
-		if err != nil {
+		if data == nil {
-			writeSSE(map[string]interface{}{"error": err.Error()})
 			return
 		}
-
+		sseWriter.Write(data)
-		choice := resp.Choices[0]
+		if canFlush {
-		content := cleanThinkingTags(choice.Message.Content)
+			flusher.Flush()
-
-		if content != "" {
-			words := strings.Fields(content)
-			for i, w := range words {
-				chunk := w
-				if i < len(words)-1 {
-					chunk += " "
 		}
-				writeSSE(map[string]interface{}{"content": chunk})
+		if tc, ok := data["tool_call"].(map[string]interface{}); ok {
-			}
-			finalContent = content
-		}
-
-		if len(choice.Message.ToolCalls) == 0 {
-			break
-		}
-
-		assistantMsg := orchestrator.Message{
-			Role:      "assistant",
-			Content:   content,
-			ToolCalls: choice.Message.ToolCalls,
-		}
-		messages = append(messages, assistantMsg)
-
-		for _, tc := range choice.Message.ToolCalls {
-			toolCallData := map[string]interface{}{
-				"tool_call_id": tc.ID,
-				"name":         tc.Function.Name,
-				"args":         tc.Function.Arguments,
-			}
-			writeSSE(map[string]interface{}{"tool_call": toolCallData})
-
 			argsMap := make(map[string]interface{})
-			json.Unmarshal([]byte(tc.Function.Arguments), &argsMap)
+			if args, ok := tc["args"].(string); ok {
-
+				json.Unmarshal([]byte(args), &argsMap)
-			tcInfo := ToolCallInfo{
+			}
-				ID:   tc.ID,
+			toolCalls = append(toolCalls, ToolCallInfo{
-				Name: tc.Function.Name,
+				ID:   toString(tc["tool_call_id"]),
+				Name: toString(tc["name"]),
 				Args: argsMap,
-			}
-
-			call := agent.ToolCall{
-				ID:        tc.ID,
-				Name:      tc.Function.Name,
-				Arguments: json.RawMessage(tc.Function.Arguments),
-			}
-
-			result, execErr := s.agentRegistry.Execute(ctx, call)
-			if execErr != nil {
-				tcInfo.Error = execErr.Error()
-				writeSSE(map[string]interface{}{"tool_result": tcInfo})
-			} else {
-				tcInfo.Result = &toolResponseData{
-					Content: result.Content,
-					IsError: result.IsError,
-					Meta:    result.Meta,
-				}
-				writeSSE(map[string]interface{}{"tool_result": tcInfo})
-			}
-
-			toolCalls = append(toolCalls, tcInfo)
-
-			messages = append(messages, orchestrator.Message{
-				Role:       "tool",
-				Content:    result.Content,
-				ToolCallID: tc.ID,
-				Name:       tc.Function.Name,
 			})
 		}
+		if tr, ok := data["tool_result"].(map[string]interface{}); ok {
+			tcID := toString(tr["tool_call_id"])
+			for i := range toolCalls {
+				if toolCalls[i].ID == tcID {
+					if err, ok := tr["is_error"].(bool); ok && err {
+						toolCalls[i].Error = toString(tr["content"])
+					} else {
+						toolCalls[i].Result = &toolResponseData{
+							Content: toString(tr["content"]),
+							IsError: toBool(tr["is_error"]),
+						}
+					}
+					break
+				}
+			}
+		}
+	})
 
-		finalContent = ""
+	finalContent, _, _, err := engine.RunWithTools(ctx, messages)
+	if err != nil {
+		sseWriter.Write(map[string]interface{}{"error": err.Error()})
+		return
 	}
 
 	if finalContent == "" && len(toolCalls) > 0 {
@@ -215,7 +180,7 @@ func (s *Server) handleShellChatStream(w http.ResponseWriter, orb *orchestrator.
 		Content:   finalContent,
 		ToolCalls: toolCalls,
 	})
-	writeSSE(map[string]interface{}{"done": true, "response": string(writeJSONResp)})
+	sseWriter.Write(map[string]interface{}{"done": true, "response": string(writeJSONResp)})
 }
 
 func (s *Server) handleShellChatNonStream(w http.ResponseWriter, orb *orchestrator.Orchestrator, req ShellChatRequest) {
@@ -224,80 +189,20 @@ func (s *Server) handleShellChatNonStream(w http.ResponseWriter, orb *orchestrat
 		{Role: "user", Content: req.Message},
 	}
 
-	var finalContent string
+	engine := NewChatEngine(orb, s.agentRegistry, s.agentToolsJSON)
-	var toolCalls []ToolCallInfo
 
-	for i := 0; i < maxShellToolIterations; i++ {
+	finalContent, err := engine.RunNonStream(ctx, messages)
-		resp, err := orb.SendWithTools(messages)
 	if err != nil {
 		writeError(w, err.Error(), http.StatusInternalServerError)
 		return
 	}
 
-		choice := resp.Choices[0]
+	if finalContent == "" {
-		content := cleanThinkingTags(choice.Message.Content)
-
-		if content != "" {
-			finalContent = content
-		}
-
-		if len(choice.Message.ToolCalls) == 0 {
-			break
-		}
-
-		assistantMsg := orchestrator.Message{
-			Role:      "assistant",
-			Content:   content,
-			ToolCalls: choice.Message.ToolCalls,
-		}
-		messages = append(messages, assistantMsg)
-
-		for _, tc := range choice.Message.ToolCalls {
-			argsMap := make(map[string]interface{})
-			json.Unmarshal([]byte(tc.Function.Arguments), &argsMap)
-
-			tcInfo := ToolCallInfo{
-				ID:   tc.ID,
-				Name: tc.Function.Name,
-				Args: argsMap,
-			}
-
-			call := agent.ToolCall{
-				ID:        tc.ID,
-				Name:      tc.Function.Name,
-				Arguments: json.RawMessage(tc.Function.Arguments),
-			}
-
-			result, execErr := s.agentRegistry.Execute(ctx, call)
-			if execErr != nil {
-				tcInfo.Error = execErr.Error()
-			} else {
-				tcInfo.Result = &toolResponseData{
-					Content: result.Content,
-					IsError: result.IsError,
-					Meta:    result.Meta,
-				}
-			}
-
-			toolCalls = append(toolCalls, tcInfo)
-
-			messages = append(messages, orchestrator.Message{
-				Role:       "tool",
-				Content:    result.Content,
-				ToolCallID: tc.ID,
-				Name:       tc.Function.Name,
-			})
-		}
-
-		finalContent = ""
-	}
-
-	if finalContent == "" && len(toolCalls) > 0 {
 		finalContent = "(tool calls completed, no text response)"
 	}
 
 	writeJSON(w, ShellChatResponse{
 		Content:   finalContent,
-		ToolCalls: toolCalls,
+		ToolCalls: nil,
 	})
 }

internal/api/handlers_test.go

@@ -0,0 +1,66 @@
+package api
+
+import (
+	"context"
+	"encoding/json"
+	"testing"
+
+	"github.com/muyue/muyue/internal/agent"
+)
+
+func TestHandleToolCall(t *testing.T) {
+	// Test unknown tool returns error
+	registry := agent.NewRegistry()
+
+	// Register a test tool
+	testTool, _ := agent.NewTool[struct{ Command string }]("test_tool", "Test tool", func(ctx context.Context, params struct{ Command string }) (agent.ToolResponse, error) {
+		return agent.TextResponse("executed: " + params.Command), nil
+	})
+	registry.Register(testTool)
+
+	// Test executing known tool
+	resp, err := registry.Execute(context.Background(), agent.ToolCall{
+		ID:   "test-id",
+		Name: "test_tool",
+		Arguments: json.RawMessage(`{"Command": "hello"}`),
+	})
+	if err != nil {
+		t.Errorf("unexpected error: %v", err)
+	}
+	if resp.IsError {
+		t.Errorf("expected no error, got error response")
+	}
+
+	// Test executing unknown tool
+	resp, err = registry.Execute(context.Background(), agent.ToolCall{
+		ID:   "test-id",
+		Name: "unknown_tool",
+		Arguments: json.RawMessage(`{}`),
+	})
+	if err != nil {
+		t.Errorf("unexpected error: %v", err)
+	}
+	if !resp.IsError {
+		t.Errorf("expected error for unknown tool")
+	}
+}
+
+func TestCleanThinkingTags(t *testing.T) {
+	tests := []struct {
+		input    string
+		expected string
+	}{
+		{"hello world", "hello world"},
+		{"<think>thinking</think>hello", "hello"},
+		{"<Think>THINKING</Think>hello", "hello"},
+		{"hello <think>thinking</think> world", "hello  world"},
+		{"no tags here", "no tags here"},
+	}
+
+	for _, tc := range tests {
+		result := cleanThinkingTags(tc.input)
+		if result != tc.expected {
+			t.Errorf("cleanThinkingTags(%q) = %q, want %q", tc.input, result, tc.expected)
+		}
+	}
+}

internal/orchestrator/orchestrator.go

@@ -6,6 +6,7 @@ import (
 	"encoding/json"
 	"fmt"
 	"io"
+	"log"
 	"net/http"
 	"regexp"
 	"strings"
@@ -76,6 +77,11 @@ var sharedHTTPClient = &http.Client{
 	Timeout: 120 * time.Second,
 }
 
+// requestClient creates an HTTP client with the specified timeout.
+func requestClient(timeout time.Duration) *http.Client {
+	return &http.Client{Timeout: timeout}
+}
+
 func New(cfg *config.MuyueConfig) (*Orchestrator, error) {
 	var provider *config.AIProvider
 	for i := range cfg.AI.Providers {
@@ -300,6 +306,142 @@ func (o *Orchestrator) SendWithTools(messages []Message) (*ChatResponse, error)
 	return chatResp, nil
 }
 
+// ChunkCallback is called for each streaming chunk.
+type ChunkCallback func(content string, toolCalls []ToolCallMsg)
+
+// SendWithToolsStream sends messages with streaming responses.
+// The callback receives chunks of content and tool_calls as they arrive.
+func (o *Orchestrator) SendWithToolsStream(messages []Message, onChunk ChunkCallback) (*ChatResponse, error) {
+	fullMessages := make([]Message, 0, len(messages)+1)
+	if o.systemPrompt != "" {
+		fullMessages = append(fullMessages, Message{Role: "system", Content: o.systemPrompt})
+	}
+	fullMessages = append(fullMessages, messages...)
+
+	reqBody := ChatRequest{
+		Model:    o.provider.Model,
+		Messages: fullMessages,
+		Stream:   true,
+		Tools:    o.tools,
+	}
+
+	body, err := json.Marshal(reqBody)
+	if err != nil {
+		return nil, fmt.Errorf("marshal request: %w", err)
+	}
+
+	provider := o.provider
+	baseURL := provider.BaseURL
+	if baseURL == "" {
+		baseURL = getProviderBaseURL(provider.Name)
+	}
+
+	url := strings.TrimRight(baseURL, "/") + "/chat/completions"
+
+	req, err := http.NewRequest("POST", url, bytes.NewReader(body))
+	if err != nil {
+		return nil, fmt.Errorf("create request: %w", err)
+	}
+
+	req.Header.Set("Content-Type", "application/json")
+	req.Header.Set("Authorization", "Bearer "+provider.APIKey)
+
+	resp, err := o.client.Do(req)
+	if err != nil {
+		return nil, fmt.Errorf("send request: %w", err)
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode != http.StatusOK {
+		respBody, _ := io.ReadAll(resp.Body)
+		return nil, fmt.Errorf("API error (%d): %s", resp.StatusCode, string(respBody))
+	}
+
+	var fullContent strings.Builder
+	var accumulatedToolCalls []ToolCallMsg
+	var totalTokens int
+
+	scanner := bufio.NewScanner(resp.Body)
+	scanner.Buffer(make([]byte, 0, 64*1024), 1024*1024)
+
+	for scanner.Scan() {
+		line := scanner.Text()
+		if !strings.HasPrefix(line, "data: ") {
+			continue
+		}
+		data := strings.TrimPrefix(line, "data: ")
+		if data == "[DONE]" {
+			break
+		}
+
+		var chatResp ChatResponse
+		if err := json.Unmarshal([]byte(data), &chatResp); err != nil {
+			continue
+		}
+
+		if len(chatResp.Choices) > 0 {
+			chunk := chatResp.Choices[0].Delta.Content
+			if chunk != "" {
+				fullContent.WriteString(chunk)
+				onChunk(chunk, nil)
+			}
+
+			// Handle delta tool calls
+			if len(chatResp.Choices[0].Delta.ToolCalls) > 0 {
+				for _, tc := range chatResp.Choices[0].Delta.ToolCalls {
+					// Find or create the tool call in accumulated list
+					found := false
+					for i := range accumulatedToolCalls {
+						if accumulatedToolCalls[i].ID == tc.ID {
+							// Append arguments
+							accumulatedToolCalls[i].Function.Arguments += tc.Function.Arguments
+							found = true
+							break
+						}
+					}
+					if !found {
+						accumulatedToolCalls = append(accumulatedToolCalls, tc)
+					}
+				}
+				onChunk("", accumulatedToolCalls)
+			}
+
+			// Capture usage from final chunk
+			if chatResp.Usage.TotalTokens > 0 {
+				totalTokens = chatResp.Usage.TotalTokens
+			}
+		}
+	}
+
+	if err := scanner.Err(); err != nil {
+		return nil, fmt.Errorf("read stream: %w", err)
+	}
+
+	// Build final response
+	finalResp := &ChatResponse{
+		Usage: struct {
+			TotalTokens int `json:"total_tokens"`
+		}{TotalTokens: totalTokens},
+		Choices: []struct {
+			Message struct {
+				Content   string        `json:"content"`
+				ToolCalls []ToolCallMsg `json:"tool_calls"`
+			} `json:"message"`
+			Delta struct {
+				Content   string        `json:"content"`
+				ToolCalls []ToolCallMsg `json:"tool_calls"`
+			} `json:"delta"`
+			FinishReason *string `json:"finish_reason"`
+		}{},
+	}
+
+	finalContent := cleanAIResponse(fullContent.String())
+	finalResp.Choices[0].Message.Content = finalContent
+	finalResp.Choices[0].Message.ToolCalls = accumulatedToolCalls
+
+	return finalResp, nil
+}
+
 func cleanAIResponse(content string) string {
 	content = thinkRegex.ReplaceAllString(content, "")
 	lines := strings.Split(content, "\n")
@@ -368,7 +510,9 @@ func (o *Orchestrator) sendWithFallback(reqBody ChatRequest, baseURLOverride str
 	}
 
 	var lastErr error
+	var triedProviders []string
 	for _, prov := range providerOrder {
+		triedProviders = append(triedProviders, prov.Name)
 		baseURL := baseURLOverride
 		if baseURL == "" {
 			baseURL = prov.BaseURL
@@ -392,7 +536,14 @@ func (o *Orchestrator) sendWithFallback(reqBody ChatRequest, baseURLOverride str
 		}
 
 		req.Header.Set("Content-Type", "application/json")
+		
+		// Provider-specific headers
+		if prov.Name == "anthropic" {
+			req.Header.Set("x-api-key", prov.APIKey)
+			req.Header.Set("anthropic-version", "2023-06-01")
+		} else {
 			req.Header.Set("Authorization", "Bearer "+prov.APIKey)
+		}
 
 		resp, err := o.client.Do(req)
 		if err != nil {
@@ -427,5 +578,6 @@ func (o *Orchestrator) sendWithFallback(reqBody ChatRequest, baseURLOverride str
 		return &chatResp, prov.Name, nil
 	}
 
+	log.Printf("[orchestrator] fallback from %v to next provider", triedProviders)
 	return nil, "", lastErr
 }

internal/version/version.go

@@ -1,11 +1,33 @@
 package version
 
+import (
+	"fmt"
+	"runtime"
+)
+
 const (
 	Name    = "muyue"
 	Version = "0.3.2"
 	Author  = "La Légion de Muyue"
 )
 
+var (
+	// BuildDate is set at build time
+	BuildDate = ""
+)
+
 func FullVersion() string {
 	return Name + " v" + Version
 }
+
+// FullInfo returns full version information.
+func FullInfo() string {
+	info := fmt.Sprintf("%-12s %s\n", "Version:", Version)
+	info += fmt.Sprintf("%-12s %s\n", "Author:", Author)
+	info += fmt.Sprintf("%-12s %s\n", "Go:", runtime.Version())
+	info += fmt.Sprintf("%-12s %s\n", "Platform:", runtime.GOOS+"/"+runtime.GOARCH)
+	if BuildDate != "" {
+		info += fmt.Sprintf("%-12s %s\n", "Build:", BuildDate)
+	}
+	return info
+}

web/src/components/Studio.jsx

@@ -53,8 +53,12 @@ function renderContent(text) {
 }
 
 function formatText(text) {
-  return text
+  // First escape HTML entities
+  let html = text
     .replace(/&/g, '&amp;').replace(/</g, '&lt;').replace(/>/g, '&gt;')
+  
+  // Apply markdown transformations (now with escaped brackets)
+  html = html
     .replace(/\*\*(.+?)\*\*/g, '<strong>$1</strong>')
     .replace(/`([^`]+)`/g, '<code class="inline-code">$1</code>')
     .replace(/^### (.+)$/gm, '<h4 class="msg-h4">$1</h4>')
@@ -62,6 +66,14 @@ function formatText(text) {
     .replace(/^# (.+)$/gm, '<h2 class="msg-h2">$1</h2>')
     .replace(/^\s*[-*] (.+)$/gm, '<div class="msg-bullet">• $1</div>')
     .replace(/^\s*(\d+)[.)] (.+)$/gm, '<div class="msg-step"><span class="msg-step-num">$1</span> $2</div>')
+  
+  // Sanitize: remove event handlers and dangerous protocols
+  html = html
+    .replace(/\s+on\w+=["'][^"']*["']/gi, '') // Remove on* event handlers
+    .replace(/javascript:/gi, '')
+    .replace(/data:/gi, '')
+  
+  return html
 }
 
 function ThinkingBlock({ content, done }) {
@@ -324,6 +336,65 @@ export default function Studio({ api }) {
       return
     }
 
+    if (text === '/help') {
+      const helpMsg = [
+        '## Commandes Studio',
+        '',
+        '- `/clear` - Effacer la conversation',
+        '- `/help` - Afficher cette aide',
+        '- `/plan <objectif>` - Demander un plan structuré',
+        '- `/export` - Exporter la conversation en Markdown',
+        '- `/model` - Afficher le provider et modèle actifs',
+        '',
+        '## Tools disponibles',
+        '- Terminal - Exécuter des commandes',
+        '- read_file - Lire des fichiers',
+        '- list_files - Lister des fichiers',
+        '- search_files - Rechercher des fichiers',
+        '- grep_content - Rechercher dans le contenu',
+        '- get_config - Lire la configuration',
+        '- web_fetch - Récupérer une page web',
+      ].join('\n')
+      setMessages(prev => [...prev, { id: Date.now().toString(), role: 'assistant', content: helpMsg, time: new Date().toISOString() }])
+      return
+    }
+
+    if (text === '/model') {
+      api.getProviders().then(data => {
+        const active = data.providers?.find(p => p.active)
+        const modelMsg = active ? `Provider: ${active.name}\nModèle: ${active.model}` : 'Aucun provider actif configuré'
+        setMessages(prev => [...prev, { id: Date.now().toString(), role: 'assistant', content: modelMsg, time: new Date().toISOString() }])
+      }).catch(() => {
+        setMessages(prev => [...prev, { id: Date.now().toString(), role: 'assistant', content: 'Erreur: impossible de récupérer les providers', time: new Date().toISOString() }])
+      })
+      return
+    }
+
+    if (text.startsWith('/plan ')) {
+      const objective = text.slice(6).trim()
+      if (!objective) {
+        setMessages(prev => [...prev, { id: Date.now().toString(), role: 'assistant', content: 'Usage: `/plan <objectif>`\nEx: `/plan créer un fichier de test`', time: new Date().toISOString() }])
+        return
+      }
+      setInput(`Crée un plan structuré en étapes numérotées pour: ${objective}. Chaque étape devrait avoir une estimation de complexité et de temps.`)
+      handleSend()
+      return
+    }
+
+    if (text === '/export') {
+      api.getChatHistory().then(data => {
+        let markdown = '# Conversation Export\n\n'
+        data.messages?.forEach((msg, i) => {
+          const roleLabel = msg.role === 'user' ? '👤' : (msg.role === 'assistant' ? '🤖' : '⚙️')
+          markdown += `## [${i + 1}] ${roleLabel} ${msg.role}\n${msg.content}\n\n---\n\n`
+        })
+        setMessages(prev => [...prev, { id: Date.now().toString(), role: 'assistant', content: 'Conversation exportée:\n```markdown\n' + markdown + '```', time: new Date().toISOString() }])
+      }).catch(() => {
+        setMessages(prev => [...prev, { id: Date.now().toString(), role: 'assistant', content: 'Erreur: impossible d\'exporter la conversation', time: new Date().toISOString() }])
+      })
+      return
+    }
+
     const userMsg = { id: Date.now().toString(), role: 'user', content: text, time: new Date().toISOString() }
     setMessages(prev => [...prev, userMsg])
     setLoading(true)
@@ -472,7 +543,7 @@ export default function Studio({ api }) {
           )}
         </div>
         <div className="studio-input-hint">
-          {t('studio.inputHint')} &middot; /clear
+          {t('studio.inputHint')} &middot; /clear /help /plan /export /model
         </div>
       </div>
     </div>

web/src/styles/global.css

@@ -684,6 +684,8 @@ input::placeholder { color: var(--text-disabled); }
   background: var(--bg-surface); border: 1px solid var(--border); border-left: 2px solid var(--accent-dim);
   border-radius: var(--radius); margin: 6px 0 8px; overflow: hidden;
   transition: all 0.3s ease;
+  max-height: 200px;
+  overflow-y: auto;
 }
 .feed-thinking-block.active {
   border-left-color: var(--warning);
@@ -826,7 +828,8 @@ input::placeholder { color: var(--text-disabled); }
   font-size: 12px;
   font-family: var(--font-mono);
   color: var(--text-tertiary);
-  white-space: nowrap;
+  white-space: pre-wrap;
+  word-break: break-all;
   overflow: hidden;
   text-overflow: ellipsis;
   border-bottom: 1px solid var(--border);