diff --git a/pkg/stdio/client.go b/pkg/stdio/client.go
index a82491d..c461565 100644
--- a/pkg/stdio/client.go
+++ b/pkg/stdio/client.go
@@ -9,72 +9,45 @@ import (
 	"net/http"
 	"net/url"
 	"sync"
+	"time"
 
 	"github.com/gorilla/websocket"
 )
 
-// JSONRPCRequest represents a JSON-RPC request
-type JSONRPCRequest struct {
-	JSONRPC string      `json:"jsonrpc"`
-	ID      int64       `json:"id"`
-	Method  string      `json:"method"`
-	Params  interface{} `json:"params"`
-}
-
-// JSONRPCResponse represents a JSON-RPC response
-type JSONRPCResponse struct {
-	JSONRPC string          `json:"jsonrpc"`
-	ID      int64           `json:"id"`
-	Result  json.RawMessage `json:"result,omitempty"`
-	Error   *JSONRPCError   `json:"error,omitempty"`
-}
-
-// JSONRPCError represents a JSON-RPC error
-type JSONRPCError struct {
-	Code    int    `json:"code"`
-	Message string `json:"message"`
-}
-
-// JSONRPCNotification represents a JSON-RPC notification
-type JSONRPCNotification struct {
-	JSONRPC      string `json:"jsonrpc"`
-	Notification struct {
-		Method string      `json:"method"`
-		Params interface{} `json:"params,omitempty"`
-	} `json:"notification"`
-}
-
 // Client implements the transport.Interface for stdio processes
 type Client struct {
-	baseURL    string
-	processID  string
-	conn       *websocket.Conn
-	mu         sync.Mutex
-	notifyChan chan JSONRPCNotification
+	baseURL   string
+	processes map[string]*Process
+	groups    map[string][]string
+	mu        sync.RWMutex
 }
 
 // NewClient creates a new stdio transport client
 func NewClient(baseURL string) *Client {
 	return &Client{
-		baseURL:    baseURL,
-		notifyChan: make(chan JSONRPCNotification, 100),
+		baseURL:   baseURL,
+		processes: make(map[string]*Process),
+		groups:    make(map[string][]string),
 	}
 }
 
-// Start initiates the connection to the server
-func (c *Client) Start(ctx context.Context) error {
-	// Start a new process
+// CreateProcess starts a new process in a group
+func (c *Client) CreateProcess(ctx context.Context, command string, args []string, env []string, groupID string) (*Process, error) {
 	req := struct {
 		Command string   `json:"command"`
 		Args    []string `json:"args"`
+		Env     []string `json:"env"`
+		GroupID string   `json:"group_id"`
 	}{
-		Command: "./mcp_server",
-		Args:    []string{},
+		Command: command,
+		Args:    args,
+		Env:     env,
+		GroupID: groupID,
 	}
 
 	reqBody, err := json.Marshal(req)
 	if err != nil {
-		return fmt.Errorf("failed to marshal request: %w", err)
+		return nil, fmt.Errorf("failed to marshal request: %w", err)
 	}
 
 	resp, err := http.Post(
@@ -83,7 +56,7 @@ func (c *Client) Start(ctx context.Context) error {
 		bytes.NewReader(reqBody),
 	)
 	if err != nil {
-		return fmt.Errorf("failed to start process: %w", err)
+		return nil, fmt.Errorf("failed to start process: %w", err)
 	}
 	defer resp.Body.Close()
 
@@ -91,124 +64,197 @@ func (c *Client) Start(ctx context.Context) error {
 		ID string `json:"id"`
 	}
 	if err := json.NewDecoder(resp.Body).Decode(&result); err != nil {
-		return fmt.Errorf("failed to decode response: %w", err)
+		return nil, fmt.Errorf("failed to decode response: %w", err)
 	}
 
-	c.processID = result.ID
+	process := &Process{
+		ID:        result.ID,
+		GroupID:   groupID,
+		CreatedAt: time.Now(),
+	}
+
+	c.mu.Lock()
+	c.processes[process.ID] = process
+	if groupID != "" {
+		c.groups[groupID] = append(c.groups[groupID], process.ID)
+	}
+	c.mu.Unlock()
+
+	return process, nil
+}
+
+// GetProcess returns a process by ID
+func (c *Client) GetProcess(id string) (*Process, error) {
+	c.mu.RLock()
+	process, exists := c.processes[id]
+	c.mu.RUnlock()
+
+	if !exists {
+		return nil, fmt.Errorf("process not found: %s", id)
+	}
+
+	return process, nil
+}
+
+// GetGroupProcesses returns all processes in a group
+func (c *Client) GetGroupProcesses(groupID string) ([]*Process, error) {
+	c.mu.RLock()
+	processIDs, exists := c.groups[groupID]
+	if !exists {
+		c.mu.RUnlock()
+		return nil, fmt.Errorf("group not found: %s", groupID)
+	}
+
+	processes := make([]*Process, 0, len(processIDs))
+	for _, pid := range processIDs {
+		if process, exists := c.processes[pid]; exists {
+			processes = append(processes, process)
+		}
+	}
+	c.mu.RUnlock()
+
+	return processes, nil
+}
+
+// StopProcess stops a single process
+func (c *Client) StopProcess(id string) error {
+	c.mu.Lock()
+	process, exists := c.processes[id]
+	if !exists {
+		c.mu.Unlock()
+		return fmt.Errorf("process not found: %s", id)
+	}
+
+	// Remove from group if it exists
+	if process.GroupID != "" {
+		groupProcesses := c.groups[process.GroupID]
+		for i, pid := range groupProcesses {
+			if pid == id {
+				c.groups[process.GroupID] = append(groupProcesses[:i], groupProcesses[i+1:]...)
+				break
+			}
+		}
+		if len(c.groups[process.GroupID]) == 0 {
+			delete(c.groups, process.GroupID)
+		}
+	}
+
+	delete(c.processes, id)
+	c.mu.Unlock()
+
+	req, err := http.NewRequest(
+		"DELETE",
+		fmt.Sprintf("%s/processes/%s", c.baseURL, id),
+		nil,
+	)
+	if err != nil {
+		return fmt.Errorf("failed to create request: %w", err)
+	}
+
+	resp, err := http.DefaultClient.Do(req)
+	if err != nil {
+		return fmt.Errorf("failed to stop process: %w", err)
+	}
+	resp.Body.Close()
+
+	return nil
+}
+
+// StopGroup stops all processes in a group
+func (c *Client) StopGroup(groupID string) error {
+	c.mu.Lock()
+	processIDs, exists := c.groups[groupID]
+	if !exists {
+		c.mu.Unlock()
+		return fmt.Errorf("group not found: %s", groupID)
+	}
+	c.mu.Unlock()
+
+	for _, pid := range processIDs {
+		if err := c.StopProcess(pid); err != nil {
+			return fmt.Errorf("failed to stop process %s in group %s: %w", pid, groupID, err)
+		}
+	}
+
+	return nil
+}
+
+// ListGroups returns all group IDs
+func (c *Client) ListGroups() []string {
+	c.mu.RLock()
+	defer c.mu.RUnlock()
+
+	groups := make([]string, 0, len(c.groups))
+	for groupID := range c.groups {
+		groups = append(groups, groupID)
+	}
+	return groups
+}
+
+// GetProcessIO returns io.Reader and io.Writer for a process
+func (c *Client) GetProcessIO(id string) (io.Reader, io.Writer, error) {
+	process, err := c.GetProcess(id)
+	if err != nil {
+		return nil, nil, err
+	}
 
 	// Connect to WebSocket
 	u := url.URL{
 		Scheme: "ws",
 		Host:   c.baseURL,
-		Path:   fmt.Sprintf("/ws/%s", c.processID),
+		Path:   fmt.Sprintf("/ws/%s", process.ID),
 	}
 
 	conn, _, err := websocket.DefaultDialer.Dial(u.String(), nil)
 	if err != nil {
-		return fmt.Errorf("failed to connect to WebSocket: %w", err)
+		return nil, nil, fmt.Errorf("failed to connect to WebSocket: %w", err)
 	}
 
-	c.conn = conn
+	// Create reader and writer
+	reader := &websocketReader{conn: conn}
+	writer := &websocketWriter{conn: conn}
 
-	// Start notification handler
-	go c.handleNotifications()
-
-	return nil
+	return reader, writer, nil
 }
 
-// Close shuts down the client and closes the transport
+// websocketReader implements io.Reader for WebSocket
+type websocketReader struct {
+	conn *websocket.Conn
+}
+
+func (r *websocketReader) Read(p []byte) (n int, err error) {
+	_, message, err := r.conn.ReadMessage()
+	if err != nil {
+		return 0, err
+	}
+	n = copy(p, message)
+	return n, nil
+}
+
+// websocketWriter implements io.Writer for WebSocket
+type websocketWriter struct {
+	conn *websocket.Conn
+}
+
+func (w *websocketWriter) Write(p []byte) (n int, err error) {
+	err = w.conn.WriteMessage(websocket.TextMessage, p)
+	if err != nil {
+		return 0, err
+	}
+	return len(p), nil
+}
+
+// Close closes all connections and stops all processes
 func (c *Client) Close() error {
 	c.mu.Lock()
 	defer c.mu.Unlock()
 
-	if c.conn != nil {
-		c.conn.Close()
-	}
-
-	if c.processID != "" {
-		req, err := http.NewRequest(
-			"DELETE",
-			fmt.Sprintf("%s/processes/%s", c.baseURL, c.processID),
-			nil,
-		)
-		if err != nil {
-			return fmt.Errorf("failed to create request: %w", err)
+	// Stop all processes
+	for id := range c.processes {
+		if err := c.StopProcess(id); err != nil {
+			return fmt.Errorf("failed to stop process %s: %w", id, err)
 		}
-
-		resp, err := http.DefaultClient.Do(req)
-		if err != nil {
-			return fmt.Errorf("failed to stop process: %w", err)
-		}
-		resp.Body.Close()
 	}
 
 	return nil
 }
-
-// SendRequest sends a JSON-RPC request to the server
-func (c *Client) SendRequest(
-	ctx context.Context,
-	request JSONRPCRequest,
-) (*JSONRPCResponse, error) {
-	c.mu.Lock()
-	defer c.mu.Unlock()
-
-	if c.conn == nil {
-		return nil, fmt.Errorf("not connected")
-	}
-
-	if err := c.conn.WriteJSON(request); err != nil {
-		return nil, fmt.Errorf("failed to write request: %w", err)
-	}
-
-	var response JSONRPCResponse
-	if err := c.conn.ReadJSON(&response); err != nil {
-		return nil, fmt.Errorf("failed to read response: %w", err)
-	}
-
-	return &response, nil
-}
-
-// SendNotification sends a JSON-RPC notification to the server
-func (c *Client) SendNotification(
-	ctx context.Context,
-	notification JSONRPCNotification,
-) error {
-	c.mu.Lock()
-	defer c.mu.Unlock()
-
-	if c.conn == nil {
-		return fmt.Errorf("not connected")
-	}
-
-	return c.conn.WriteJSON(notification)
-}
-
-// SetNotificationHandler sets the handler for notifications
-func (c *Client) SetNotificationHandler(
-	handler func(notification JSONRPCNotification),
-) {
-	go func() {
-		for notification := range c.notifyChan {
-			handler(notification)
-		}
-	}()
-}
-
-func (c *Client) handleNotifications() {
-	for {
-		var notification JSONRPCNotification
-		if err := c.conn.ReadJSON(&notification); err != nil {
-			if err == io.EOF {
-				return
-			}
-			continue
-		}
-
-		select {
-		case c.notifyChan <- notification:
-		default:
-			// Drop notification if channel is full
-		}
-	}
-}
diff --git a/pkg/stdio/example/main.go b/pkg/stdio/example/main.go
index d5e348c..becdbe8 100644
--- a/pkg/stdio/example/main.go
+++ b/pkg/stdio/example/main.go
@@ -3,6 +3,7 @@ package main
 import (
 	"context"
 	"fmt"
+	"io"
 	"log"
 	"time"
 
@@ -24,48 +25,60 @@ func main() {
 	// Create a client
 	client := stdio.NewClient("localhost:8080")
 
-	// Start the client
-	if err := client.Start(context.Background()); err != nil {
-		log.Fatalf("Failed to start client: %v", err)
-	}
-	defer client.Close()
+	// Create a process group
+	groupID := "test-group"
 
-	// Set up notification handler
-	client.SetNotificationHandler(func(notification stdio.JSONRPCNotification) {
-		fmt.Printf("Received notification: %+v\n", notification)
-	})
-
-	// Send a request
-	request := stdio.JSONRPCRequest{
-		JSONRPC: "2.0",
-		ID:      1,
-		Method:  "test",
-		Params:  map[string]string{"hello": "world"},
-	}
-
-	response, err := client.SendRequest(context.Background(), request)
+	// Start a process in the group
+	process, err := client.CreateProcess(
+		context.Background(),
+		"echo",
+		[]string{"Hello, World!"},
+		[]string{"TEST=value"},
+		groupID,
+	)
 	if err != nil {
-		log.Fatalf("Failed to send request: %v", err)
+		log.Fatalf("Failed to create process: %v", err)
 	}
 
-	fmt.Printf("Received response: %+v\n", response)
-
-	// Send a notification
-	notification := stdio.JSONRPCNotification{
-		JSONRPC: "2.0",
-		Notification: struct {
-			Method string      `json:"method"`
-			Params interface{} `json:"params,omitempty"`
-		}{
-			Method: "test",
-			Params: map[string]string{"hello": "world"},
-		},
+	// Get IO streams for the process
+	reader, writer, err := client.GetProcessIO(process.ID)
+	if err != nil {
+		log.Fatalf("Failed to get process IO: %v", err)
 	}
 
-	if err := client.SendNotification(context.Background(), notification); err != nil {
-		log.Fatalf("Failed to send notification: %v", err)
+	// Write to the process
+	_, err = writer.Write([]byte("Hello from client\n"))
+	if err != nil {
+		log.Fatalf("Failed to write to process: %v", err)
 	}
 
-	// Keep the program running
-	select {}
+	// Read from the process
+	buf := make([]byte, 1024)
+	n, err := reader.Read(buf)
+	if err != nil && err != io.EOF {
+		log.Fatalf("Failed to read from process: %v", err)
+	}
+	fmt.Printf("Process output: %s", buf[:n])
+
+	// Get all processes in the group
+	processes, err := client.GetGroupProcesses(groupID)
+	if err != nil {
+		log.Printf("Failed to get group processes: %v", err)
+	} else {
+		fmt.Printf("Processes in group %s: %+v\n", groupID, processes)
+	}
+
+	// List all groups
+	groups := client.ListGroups()
+	fmt.Printf("All groups: %v\n", groups)
+
+	// Stop the process
+	if err := client.StopProcess(process.ID); err != nil {
+		log.Fatalf("Failed to stop process: %v", err)
+	}
+
+	// Close the client
+	if err := client.Close(); err != nil {
+		log.Fatalf("Failed to close client: %v", err)
+	}
 }
diff --git a/pkg/stdio/server.go b/pkg/stdio/server.go
index 22450bf..1c07578 100644
--- a/pkg/stdio/server.go
+++ b/pkg/stdio/server.go
@@ -6,6 +6,7 @@ import (
 	"fmt"
 	"io"
 	"net/http"
+	"os"
 	"os/exec"
 	"sync"
 	"time"
@@ -16,6 +17,7 @@ import (
 // Process represents a running process with its stdio streams
 type Process struct {
 	ID        string
+	GroupID   string
 	Cmd       *exec.Cmd
 	Stdin     io.WriteCloser
 	Stdout    io.ReadCloser
@@ -26,6 +28,7 @@ type Process struct {
 // Server handles process management and stdio streaming
 type Server struct {
 	processes map[string]*Process
+	groups    map[string][]string // maps group ID to process IDs
 	mu        sync.RWMutex
 	upgrader  websocket.Upgrader
 }
@@ -34,6 +37,7 @@ type Server struct {
 func NewServer() *Server {
 	return &Server{
 		processes: make(map[string]*Process),
+		groups:    make(map[string][]string),
 		upgrader: websocket.Upgrader{
 			CheckOrigin: func(r *http.Request) bool { return true },
 		},
@@ -41,9 +45,13 @@ func NewServer() *Server {
 }
 
 // StartProcess starts a new process and returns its ID
-func (s *Server) StartProcess(ctx context.Context, command string, args []string) (string, error) {
+func (s *Server) StartProcess(ctx context.Context, command string, args []string, env []string, groupID string) (string, error) {
 	cmd := exec.CommandContext(ctx, command, args...)
 
+	if len(env) > 0 {
+		cmd.Env = append(os.Environ(), env...)
+	}
+
 	stdin, err := cmd.StdinPipe()
 	if err != nil {
 		return "", fmt.Errorf("failed to create stdin pipe: %w", err)
@@ -65,6 +73,7 @@ func (s *Server) StartProcess(ctx context.Context, command string, args []string
 
 	process := &Process{
 		ID:        fmt.Sprintf("%d", time.Now().UnixNano()),
+		GroupID:   groupID,
 		Cmd:       cmd,
 		Stdin:     stdin,
 		Stdout:    stdout,
@@ -74,6 +83,9 @@ func (s *Server) StartProcess(ctx context.Context, command string, args []string
 
 	s.mu.Lock()
 	s.processes[process.ID] = process
+	if groupID != "" {
+		s.groups[groupID] = append(s.groups[groupID], process.ID)
+	}
 	s.mu.Unlock()
 
 	return process.ID, nil
@@ -87,6 +99,21 @@ func (s *Server) StopProcess(id string) error {
 		s.mu.Unlock()
 		return fmt.Errorf("process not found: %s", id)
 	}
+
+	// Remove from group if it exists
+	if process.GroupID != "" {
+		groupProcesses := s.groups[process.GroupID]
+		for i, pid := range groupProcesses {
+			if pid == id {
+				s.groups[process.GroupID] = append(groupProcesses[:i], groupProcesses[i+1:]...)
+				break
+			}
+		}
+		if len(s.groups[process.GroupID]) == 0 {
+			delete(s.groups, process.GroupID)
+		}
+	}
+
 	delete(s.processes, id)
 	s.mu.Unlock()
 
@@ -97,6 +124,57 @@ func (s *Server) StopProcess(id string) error {
 	return nil
 }
 
+// StopGroup stops all processes in a group
+func (s *Server) StopGroup(groupID string) error {
+	s.mu.Lock()
+	processIDs, exists := s.groups[groupID]
+	if !exists {
+		s.mu.Unlock()
+		return fmt.Errorf("group not found: %s", groupID)
+	}
+	s.mu.Unlock()
+
+	for _, pid := range processIDs {
+		if err := s.StopProcess(pid); err != nil {
+			return fmt.Errorf("failed to stop process %s in group %s: %w", pid, groupID, err)
+		}
+	}
+
+	return nil
+}
+
+// GetGroupProcesses returns all processes in a group
+func (s *Server) GetGroupProcesses(groupID string) ([]*Process, error) {
+	s.mu.RLock()
+	processIDs, exists := s.groups[groupID]
+	if !exists {
+		s.mu.RUnlock()
+		return nil, fmt.Errorf("group not found: %s", groupID)
+	}
+
+	processes := make([]*Process, 0, len(processIDs))
+	for _, pid := range processIDs {
+		if process, exists := s.processes[pid]; exists {
+			processes = append(processes, process)
+		}
+	}
+	s.mu.RUnlock()
+
+	return processes, nil
+}
+
+// ListGroups returns all group IDs
+func (s *Server) ListGroups() []string {
+	s.mu.RLock()
+	defer s.mu.RUnlock()
+
+	groups := make([]string, 0, len(s.groups))
+	for groupID := range s.groups {
+		groups = append(groups, groupID)
+	}
+	return groups
+}
+
 // GetProcess returns a process by ID
 func (s *Server) GetProcess(id string) (*Process, error) {
 	s.mu.RLock()
@@ -128,6 +206,8 @@ func (s *Server) Start(addr string) error {
 	http.HandleFunc("/processes", s.handleProcesses)
 	http.HandleFunc("/processes/", s.handleProcess)
 	http.HandleFunc("/ws/", s.handleWebSocket)
+	http.HandleFunc("/groups", s.handleGroups)
+	http.HandleFunc("/groups/", s.handleGroup)
 
 	return http.ListenAndServe(addr, nil)
 }
@@ -141,13 +221,15 @@ func (s *Server) handleProcesses(w http.ResponseWriter, r *http.Request) {
 		var req struct {
 			Command string   `json:"command"`
 			Args    []string `json:"args"`
+			Env     []string `json:"env"`
+			GroupID string   `json:"group_id"`
 		}
 		if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
 			http.Error(w, err.Error(), http.StatusBadRequest)
 			return
 		}
 
-		id, err := s.StartProcess(r.Context(), req.Command, req.Args)
+		id, err := s.StartProcess(r.Context(), req.Command, req.Args, req.Env, req.GroupID)
 		if err != nil {
 			http.Error(w, err.Error(), http.StatusInternalServerError)
 			return
@@ -212,6 +294,7 @@ func (s *Server) handleWebSocket(w http.ResponseWriter, r *http.Request) {
 	go func() {
 		buf := make([]byte, 1024)
 		for {
+
 			n, err := process.Stdout.Read(buf)
 			if err != nil {
 				return
@@ -235,3 +318,36 @@ func (s *Server) handleWebSocket(w http.ResponseWriter, r *http.Request) {
 	// Wait for process to exit
 	process.Cmd.Wait()
 }
+
+// Add new handlers for group management
+func (s *Server) handleGroups(w http.ResponseWriter, r *http.Request) {
+	switch r.Method {
+	case http.MethodGet:
+		groups := s.ListGroups()
+		json.NewEncoder(w).Encode(groups)
+	default:
+		http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
+	}
+}
+
+func (s *Server) handleGroup(w http.ResponseWriter, r *http.Request) {
+	groupID := r.URL.Path[len("/groups/"):]
+
+	switch r.Method {
+	case http.MethodGet:
+		processes, err := s.GetGroupProcesses(groupID)
+		if err != nil {
+			http.Error(w, err.Error(), http.StatusNotFound)
+			return
+		}
+		json.NewEncoder(w).Encode(processes)
+	case http.MethodDelete:
+		if err := s.StopGroup(groupID); err != nil {
+			http.Error(w, err.Error(), http.StatusNotFound)
+			return
+		}
+		w.WriteHeader(http.StatusNoContent)
+	default:
+		http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
+	}
+}