diff --git a/DOC/AGENT_Context_Project.md b/DOC/AGENT_Context_Project.md
index b9477d4..2968c2a 100644
--- a/DOC/AGENT_Context_Project.md
+++ b/DOC/AGENT_Context_Project.md
@@ -45,6 +45,7 @@ Linux_post_install/
 │   ├── pos-system-firewall # Interactive UFW manager (menu-driven, 284 lines)
 │   ├── pos-system-backup   # Encrypted folder snapshots (tar + gpg AES-256, --service) (115 lines)
 │   ├── pos-ssh-load-keys   # Load SSH keys into ssh-agent
+│   ├── pos-communication-telegram  # Send Telegram messages via Bot API
 │   ├── pos-vbox            # Disposable Docker-based "VMs"
 │   ├── pos-network-hotspot # Wi-Fi hotspot (create_ap + wihotspot-gui)
 │   ├── flag-reader         # Inspect feature flags (list/status/--raw)
@@ -201,6 +202,7 @@ All non-interactive `pos` commands log output to `~/.local/share/linux_post_inst
 | system | firewall | `pos-system-firewall` | Interactive UFW management |
 | system | backup | `pos-system-backup` | Encrypted folder snapshots (`tar` + gpg AES-256; `--service` picks from `/srv` and `~/srv`) |
 | ssh | load-keys | `pos-ssh-load-keys` | Load SSH keys into agent |
+| communication | telegram | `pos-communication-telegram` | Send Telegram messages via Bot API (`--send`, `test`, `config set`); config in `~/.config/linux_post_install/telegram.env` |
 | vbox | create | `pos-vbox create` | Create disposable VM (asks "Enter now?") |
 | vbox | enter | `pos-vbox enter` | Start and exec into container |
 | vbox | ls | `pos-vbox ls` | List vbox-managed containers only (label-filtered) |
@@ -246,7 +248,7 @@ Sourced by most scripts. Provides:
 source "$(dirname "$0")/../lib/common.sh"
 ```
 
-**Scripts that do NOT source common.sh** (self-contained): `bin/pos`, `pos-network-ip`, `pos-network-checkport`, `pos-network-scan`, `pos-media-mp3`, `pos-media-mp4`, `pos-ssh-load-keys`, `pos-system-firewall`.
+**Scripts that do NOT source common.sh** (self-contained): `bin/pos`, `pos-network-ip`, `pos-network-checkport`, `pos-network-scan`, `pos-media-mp3`, `pos-media-mp4`, `pos-ssh-load-keys`, `pos-system-firewall`, `pos-communication-telegram`.
 
 ---
 
@@ -444,7 +446,7 @@ Use conventional prefixes: `feat:`, `fix:`, `docs:`, `refactor:`, `chore:`
 | `bin/flag-set` | 21 | Set a flag (optionally with a value) |
 | `bin/flag-clear` | 21 | Unset a flag |
 | `features/autostart.sh` | 14 | Boot-time feature (moved from `bin/`, flag-gated service) |
-| `bin/pos` | 146 | CLI dispatcher with smart arg matching + logging |
+| `bin/pos` | 153 | CLI dispatcher with smart arg matching + logging |
 | `bin/pos-docker-compose` | 363 | Largest script — full compose management |
 | `bin/pos-system-firewall` | 284 | Interactive UFW manager |
 | `bin/pos-system-backup` | 115 | Encrypted folder snapshots: path mode + `--service` (`/srv`, `~/srv` picker), tar + gpg AES-256 |
@@ -452,6 +454,7 @@ Use conventional prefixes: `feat:`, `fix:`, `docs:`, `refactor:`, `chore:`
 | `bin/pos-docker-health` | 109 | Quick health dashboard |
 | `bin/pos-vbox` | 156 | Docker-based disposable VMs (label-filtered, auto-enter prompt) |
 | `bin/pos-network-hotspot` | 91 | Wi-Fi hotspot: `create_ap` (start with background prompt/`--foreground`, stop, status) + `wihotspot-gui` |
+| `bin/pos-communication-telegram` | 138 | Telegram sender via Bot API: `--send`, `test`, `config set`; token masked; config `~/.config/linux_post_install/telegram.env` |
 | `completions/pos.bash` | 118 | Dynamic bash completion |
 | `apps/install.sh` | 171 | App install/uninstall picker/orchestrator |
 
diff --git a/DOC/POS.md b/DOC/POS.md
index e2b9fd9..c49c5c5 100644
--- a/DOC/POS.md
+++ b/DOC/POS.md
@@ -10,6 +10,7 @@
   - [media](#media)
   - [system](#system)
   - [ssh](#ssh)
+  - [communication](#communication)
   - [vbox](#vbox)
   - [flags](#flags)
 - [Legacy wrappers](#legacy-wrappers)
@@ -145,6 +146,25 @@ Global config keys:
 |---------|------|---------|---------------|
 | `pos ssh load-keys` | `bin/pos-ssh-load-keys` | Load all `~/.ssh/id_*` private keys into the ssh-agent | Uses `SSH_AUTH_SOCK` (default `/run/ssh-agent/socket`, provided by `ssh-agent.service`); skips `.pub`, `known_hosts`, `authorized_keys`, `config`; validates keys before adding |
 
+### communication
+
+| Command | File | Purpose | Configuration |
+|---------|------|---------|---------------|
+| `pos communication telegram --send "text"` | `bin/pos-communication-telegram` | Send a text message to a Telegram chat via the Bot API | Token + chat ID from `~/.config/linux_post_install/telegram.env` (`TELEGRAM_BOT_TOKEN`, `TELEGRAM_CHAT_ID`, chmod 600). Precedence: `--token`/`--chat-id` flags > env > config file |
+
+`pos communication telegram` in detail:
+
+| Command | Behavior |
+|---------|----------|
+| `pos communication telegram --send "text"` | POSTs `sendMessage` to the Bot API (20s timeout); prints `[+] Message sent to chat <id>` or fails with a nonzero exit |
+| `pos communication telegram --send "text" --token <t> --chat-id <id>` | One-shot override of token/chat ID |
+| `pos communication telegram test` | Sends a canned test message using the current config |
+| `pos communication telegram config` | Shows current config (bot token masked) |
+| `pos communication telegram config set TELEGRAM_BOT_TOKEN=...` | Saves a bot token (600 perms) |
+| `pos communication telegram config set TELEGRAM_CHAT_ID=...` | Saves the target chat ID |
+
+The bot token is a secret — it is stored only in `~/.config/linux_post_install/telegram.env` and never in the repo. Requires network access to `api.telegram.org`.
+
 ### vbox
 
 **File:** `bin/pos-vbox`
diff --git a/README.md b/README.md
index d109403..1dde178 100755
--- a/README.md
+++ b/README.md
@@ -11,7 +11,7 @@ It is a **personal toolkit** — a bootstrap script, a unified `pos` CLI for eve
 **What you get:**
 
 - 25+ system packages installed automatically
-- The `pos` CLI: network, Docker, media, system, SSH, and vbox tools
+- The `pos` CLI: network, Docker, media, system, SSH, communication (Telegram), and vbox tools
 - Wi-Fi hotspot tools (`create_ap`, `wihotspot-gui`) via `pos network hotspot`
 - 15 optional desktop apps (VS Code, Brave, OBS, Tailscale, …) — pick what you want
 - 119+ self-hosted services with Tailscale access (Jellyfin, Home Assistant, …)
diff --git a/apps/utilities/tsui.sh b/apps/utilities/tsui.sh
new file mode 100755
index 0000000..3515f40
--- /dev/null
+++ b/apps/utilities/tsui.sh
@@ -0,0 +1,22 @@
+#!/usr/bin/env bash
+set -euo pipefail
+source "$(dirname "$0")/../../lib/common.sh"
+
+install_tsui() {
+    command -v tsui &>/dev/null && { log "tsui already installed"; return 0; }
+
+    spawn "Installing tsui" bash -c "
+        curl -fsSL https://neuralink.com/tsui/install.sh | bash
+    "
+    log "Run tsui: sudo tsui"
+}
+
+uninstall_tsui() {
+    command -v tsui &>/dev/null || { log "tsui not installed"; return 0; }
+    spawn "Removing tsui" sudo rm -f /usr/local/bin/tsui
+}
+
+case "${1:-}" in
+    uninstall) uninstall_tsui ;;
+    *) install_tsui ;;
+esac
diff --git a/bin/pos b/bin/pos
index 8851e9a..ac6206f 100755
--- a/bin/pos
+++ b/bin/pos
@@ -42,6 +42,8 @@ CATEGORIES
   media      mp3 | mp4
   system     firewall | backup
   ssh        load-keys
+  communication
+             telegram
   vbox       create | enter | stop | start | rm | ls
 
 EXAMPLES
@@ -63,6 +65,9 @@ EXAMPLES
 
   pos ssh load-keys                       Load all SSH keys into agent
 
+  pos communication telegram --send "Backup done"
+                                          Send a Telegram message
+
   pos vbox create lab1                    Create disposable Docker VM
   pos vbox create lab1 --dir .            Create VM using current directory
   pos vbox enter lab1                     Shell into a Docker VM
diff --git a/bin/pos-communication-telegram b/bin/pos-communication-telegram
new file mode 100755
index 0000000..a2b369e
--- /dev/null
+++ b/bin/pos-communication-telegram
@@ -0,0 +1,138 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+CONFIG_DIR="$HOME/.config/linux_post_install"
+CONFIG_FILE="$CONFIG_DIR/telegram.env"
+API="https://api.telegram.org"
+
+usage() {
+    cat <<EOF
+Usage: pos communication telegram [command] [args]
+
+Send Telegram messages via the Bot API.
+
+Commands:
+  --send "text"             Send a text message to the configured chat
+  --send "text" --token <t> --chat-id <id>   Override token/chat for one send
+  test                      Send a test message using the current config
+  config                    Show current config (token masked)
+  config set KEY=VALUE      Set TELEGRAM_BOT_TOKEN or TELEGRAM_CHAT_ID
+
+Config file: $CONFIG_FILE
+Keys: TELEGRAM_BOT_TOKEN | TELEGRAM_CHAT_ID
+
+Precedence: CLI flags > environment > config file.
+
+Examples:
+  pos communication telegram config set TELEGRAM_BOT_TOKEN=123456:ABC-DEF
+  pos communication telegram config set TELEGRAM_CHAT_ID=987654321
+  pos communication telegram --send "Backup finished"
+  pos communication telegram test
+EOF
+    exit 0
+}
+
+err() { echo "ERROR: $*" >&2; exit 1; }
+
+load_config() {
+    [ -f "$CONFIG_FILE" ] || return 0
+    local k v
+    while IFS='=' read -r k v; do
+        [ -n "$k" ] || continue
+        case "$k" in
+            \#*) continue ;;
+        esac
+        v="${v%\"}"; v="${v#\"}"; v="${v%\'}"; v="${v#\'}"
+        if [ -z "${!k:-}" ]; then
+            export "$k"="$v"
+        fi
+    done < <(grep -E '^[A-Z_]+=' "$CONFIG_FILE" || true)
+}
+
+mask_token() {
+    local t="$1"
+    [ -z "$t" ] && { echo "(not set)"; return; }
+    if [ "${#t}" -le 12 ]; then
+        echo "${t:0:4}... (${#t} chars)"
+    else
+        echo "${t:0:6}...${t: -4} (${#t} chars)"
+    fi
+}
+
+cmd_send() {
+    local text="$1"
+    [ -z "${TELEGRAM_BOT_TOKEN:-}" ] && err "No bot token — run 'pos communication telegram config set TELEGRAM_BOT_TOKEN=...'"
+    [ -z "${TELEGRAM_CHAT_ID:-}" ] && err "No chat id — run 'pos communication telegram config set TELEGRAM_CHAT_ID=...'"
+    curl -fsS -m 20 -X POST "$API/bot${TELEGRAM_BOT_TOKEN}/sendMessage" \
+        --data-urlencode "chat_id=${TELEGRAM_CHAT_ID}" \
+        --data-urlencode "text=${text}" >/dev/null
+    echo "[+] Message sent to chat ${TELEGRAM_CHAT_ID}"
+}
+
+cmd_config() {
+    load_config
+    echo "Config: $CONFIG_FILE"
+    echo "  TELEGRAM_BOT_TOKEN = $(mask_token "${TELEGRAM_BOT_TOKEN:-}")"
+    echo "  TELEGRAM_CHAT_ID   = ${TELEGRAM_CHAT_ID:-}"
+}
+
+cmd_config_set() {
+    local kv="$1"
+    local key="${kv%%=*}"
+    local val="${kv#*=}"
+    case "$key" in
+        TELEGRAM_BOT_TOKEN|TELEGRAM_CHAT_ID) ;;
+        *) err "Unknown key '$key' (allowed: TELEGRAM_BOT_TOKEN, TELEGRAM_CHAT_ID)" ;;
+    esac
+    [ -z "$val" ] && err "No value given (expected $key=...)"
+
+    mkdir -p "$CONFIG_DIR"
+    if [ -f "$CONFIG_FILE" ]; then
+        if grep -q "^${key}=" "$CONFIG_FILE"; then
+            sed -i "s|^${key}=.*|${key}=${val}|" "$CONFIG_FILE"
+        else
+            echo "${key}=${val}" >>"$CONFIG_FILE"
+        fi
+    else
+        echo "${key}=${val}" >"$CONFIG_FILE"
+    fi
+    chmod 600 "$CONFIG_FILE"
+    echo "[+] $key saved to $CONFIG_FILE"
+}
+
+cmd="${1:-}"
+
+case "$cmd" in
+    -h|--help) usage ;;
+    --send)
+        shift
+        [ $# -ge 1 ] || usage
+        text="$1"
+        shift
+        while [ $# -gt 0 ]; do
+            case "$1" in
+                --token)   TELEGRAM_BOT_TOKEN="$2"; shift 2 ;;
+                --chat-id) TELEGRAM_CHAT_ID="$2"; shift 2 ;;
+                *) err "Unknown option '$1'" ;;
+            esac
+        done
+        load_config
+        cmd_send "$text"
+        ;;
+    test)
+        load_config
+        cmd_send "Test message from pos $(date '+%Y-%m-%d %H:%M:%S')"
+        ;;
+    config)
+        shift
+        case "${1:-}" in
+            set) shift; [ $# -eq 1 ] || usage; cmd_config_set "$1" ;;
+            *) cmd_config ;;
+        esac
+        ;;
+    *)
+        echo "ERROR: Unknown telegram command '$cmd'"
+        echo "Run 'pos communication telegram --help' for usage."
+        exit 1
+        ;;
+esac