diff --git a/README.md b/README.md
index 89fbbce..ce97a7d 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,12 @@
 # all_tg_bot
 
 Бот подменяет @all на список участников чата
+
+    Usage:
+        main [OPTIONS]
+    
+    Application Options:
+        -t, --token= Telegram api token
+    
+    Help Options:
+        -h, --help   Show this help message
diff --git a/go.mod b/go.mod
index 61ab71a..2c64aac 100644
--- a/go.mod
+++ b/go.mod
@@ -1,3 +1,10 @@
 module git.user-penguin.space/vladimir/all_tg_bot
 
 go 1.18
+
+require (
+	github.com/go-telegram-bot-api/telegram-bot-api v4.6.4+incompatible
+	github.com/umputun/go-flags v1.5.1
+)
+
+require github.com/technoweenie/multipartstreamer v1.0.1 // indirect
diff --git a/main.go b/main.go
index a3dd973..78b1dde 100644
--- a/main.go
+++ b/main.go
@@ -1,7 +1,63 @@
 package main
 
-import "fmt"
+import (
+	"errors"
+	tgbot "github.com/go-telegram-bot-api/telegram-bot-api"
+	"github.com/umputun/go-flags"
+	"log"
+	"os"
+	"strings"
+)
+
+const (
+	tag      = "@all"
+	allUsers = "@vo13crabs @disconecto @v9gel @KeyM_v2 @k_ukolov @iamembarrassed @freel_Fedorov_Kirill @butinmv"
+)
+
+type Opts struct {
+	Token string `short:"t" long:"token" description:"Telegram api token"`
+}
+
+var opts Opts
 
 func main() {
-	fmt.Println("Hello, World!")
+	run()
+}
+
+func run() {
+	p := flags.NewParser(&opts, flags.PrintErrors|flags.PassDoubleDash|flags.HelpFlag)
+	p.SubcommandsOptional = true
+	if _, err := p.Parse(); err != nil {
+		if err.(*flags.Error).Type != flags.ErrHelp {
+			log.Println(errors.New("[ERROR] cli error: " + err.Error()))
+		}
+		os.Exit(2)
+	}
+
+	bot, err := tgbot.NewBotAPI(opts.Token)
+	if err != nil {
+		panic(err)
+	}
+
+	u := tgbot.NewUpdate(0)
+	u.Timeout = 60
+
+	updates, err := bot.GetUpdatesChan(u)
+	if err != nil {
+		panic(err)
+	}
+
+	for update := range updates {
+
+		if update.Message == nil {
+			continue
+		}
+
+		text := update.Message.Text
+		chatID := update.Message.Chat.ID
+
+		if strings.Contains(strings.ToLower(text), tag) {
+			_, _ = bot.Send(tgbot.NewMessage(chatID, allUsers))
+		}
+	}
 }