diff --git a/resources/commands/apps/command.toml b/resources/commands/apps/command.toml
new file mode 100644
index 0000000..5ce0817
--- /dev/null
+++ b/resources/commands/apps/command.toml
@@ -0,0 +1,230 @@
+[[commands]]
+id = "open_browser"
+type = "lua"
+script = "open_browser.lua"
+sandbox = "full"
+timeout = 5000
+
+[commands.phrases]
+ru = [
+    "открой браузер",
+    "запусти браузер",
+    "открой хром",
+    "запусти хром",
+    "включи браузер",
+    "браузер открой",
+    "нужен браузер",
+]
+en = [
+    "open browser",
+    "launch browser",
+    "open chrome",
+    "launch chrome",
+    "start browser",
+    "i need browser",
+]
+ua = [
+    "відкрий браузер",
+    "запусти браузер",
+    "відкрий хром",
+    "запусти хром",
+    "увімкни браузер",
+]
+
+
+[[commands]]
+id = "open_notepad"
+type = "lua"
+script = "open_notepad.lua"
+sandbox = "full"
+timeout = 5000
+
+[commands.phrases]
+ru = [
+    "открой блокнот",
+    "запусти блокнот",
+    "открой нотепад",
+]
+en = [
+    "open notepad",
+    "launch notepad",
+]
+ua = [
+    "відкрий блокнот",
+    "запусти блокнот",
+]
+
+
+[[commands]]
+id = "open_calculator"
+type = "lua"
+script = "open_calculator.lua"
+sandbox = "full"
+timeout = 5000
+
+[commands.phrases]
+ru = [
+    "открой калькулятор",
+    "запусти калькулятор",
+    "нужен калькулятор",
+]
+en = [
+    "open calculator",
+    "launch calculator",
+    "calculator please",
+]
+ua = [
+    "відкрий калькулятор",
+    "запусти калькулятор",
+]
+
+
+[[commands]]
+id = "open_explorer"
+type = "lua"
+script = "open_explorer.lua"
+sandbox = "full"
+timeout = 5000
+
+[commands.phrases]
+ru = [
+    "открой проводник",
+    "открой папку",
+    "запусти проводник",
+    "открой файлы",
+]
+en = [
+    "open explorer",
+    "open file explorer",
+    "open files",
+    "open folder",
+]
+ua = [
+    "відкрий провідник",
+    "відкрий папку",
+]
+
+
+[[commands]]
+id = "open_terminal"
+type = "lua"
+script = "open_terminal.lua"
+sandbox = "full"
+timeout = 5000
+
+[commands.phrases]
+ru = [
+    "открой терминал",
+    "запусти терминал",
+    "открой консоль",
+    "запусти консоль",
+    "открой повершелл",
+]
+en = [
+    "open terminal",
+    "open powershell",
+    "open console",
+    "launch terminal",
+]
+ua = [
+    "відкрий термінал",
+    "відкрий консоль",
+]
+
+
+[[commands]]
+id = "open_settings"
+type = "lua"
+script = "open_settings.lua"
+sandbox = "full"
+timeout = 5000
+
+[commands.phrases]
+ru = [
+    "открой настройки",
+    "открой параметры",
+    "запусти настройки",
+    "открой настройки виндоус",
+]
+en = [
+    "open settings",
+    "launch settings",
+    "windows settings",
+]
+ua = [
+    "відкрий налаштування",
+    "відкрий параметри",
+]
+
+
+[[commands]]
+id = "open_task_manager"
+type = "lua"
+script = "open_task_manager.lua"
+sandbox = "full"
+timeout = 5000
+
+[commands.phrases]
+ru = [
+    "открой диспетчер задач",
+    "запусти диспетчер задач",
+    "диспетчер задач",
+]
+en = [
+    "open task manager",
+    "launch task manager",
+    "task manager",
+]
+ua = [
+    "відкрий диспетчер задач",
+    "диспетчер задач",
+]
+
+
+[[commands]]
+id = "lock_screen"
+type = "lua"
+script = "lock_screen.lua"
+sandbox = "full"
+timeout = 3000
+
+[commands.phrases]
+ru = [
+    "заблокируй компьютер",
+    "заблокируй экран",
+    "блокировка экрана",
+    "залочь",
+]
+en = [
+    "lock screen",
+    "lock the computer",
+    "lock pc",
+]
+ua = [
+    "заблокуй комп'ютер",
+    "заблокуй екран",
+]
+
+
+[[commands]]
+id = "screenshot"
+type = "lua"
+script = "screenshot.lua"
+sandbox = "full"
+timeout = 5000
+
+[commands.phrases]
+ru = [
+    "сделай скриншот",
+    "скриншот",
+    "сними экран",
+]
+en = [
+    "take screenshot",
+    "screenshot",
+    "capture screen",
+]
+ua = [
+    "зроби скріншот",
+    "знімок екрана",
+]
diff --git a/resources/commands/apps/lock_screen.lua b/resources/commands/apps/lock_screen.lua
new file mode 100644
index 0000000..956384f
--- /dev/null
+++ b/resources/commands/apps/lock_screen.lua
@@ -0,0 +1,8 @@
+local res = jarvis.system.exec("rundll32.exe user32.dll,LockWorkStation")
+if res.success then
+    jarvis.audio.play_ok()
+else
+    jarvis.log("error", "lock screen failed: " .. tostring(res.stderr))
+    jarvis.audio.play_error()
+end
+return { chain = false }
diff --git a/resources/commands/apps/open_browser.lua b/resources/commands/apps/open_browser.lua
new file mode 100644
index 0000000..c1061ac
--- /dev/null
+++ b/resources/commands/apps/open_browser.lua
@@ -0,0 +1,9 @@
+local cmd = "start \"\" \"https://www.google.com\""
+local res = jarvis.system.exec(cmd)
+if res.success then
+    jarvis.audio.play_ok()
+else
+    jarvis.log("error", "open browser failed: " .. tostring(res.stderr))
+    jarvis.audio.play_error()
+end
+return { chain = false }
diff --git a/resources/commands/apps/open_calculator.lua b/resources/commands/apps/open_calculator.lua
new file mode 100644
index 0000000..0afe795
--- /dev/null
+++ b/resources/commands/apps/open_calculator.lua
@@ -0,0 +1,8 @@
+local res = jarvis.system.exec("start \"\" calc.exe")
+if res.success then
+    jarvis.audio.play_ok()
+else
+    jarvis.log("error", "open calculator failed: " .. tostring(res.stderr))
+    jarvis.audio.play_error()
+end
+return { chain = false }
diff --git a/resources/commands/apps/open_explorer.lua b/resources/commands/apps/open_explorer.lua
new file mode 100644
index 0000000..5c6a2e4
--- /dev/null
+++ b/resources/commands/apps/open_explorer.lua
@@ -0,0 +1,8 @@
+local res = jarvis.system.exec("start \"\" explorer.exe")
+if res.success then
+    jarvis.audio.play_ok()
+else
+    jarvis.log("error", "open explorer failed: " .. tostring(res.stderr))
+    jarvis.audio.play_error()
+end
+return { chain = false }
diff --git a/resources/commands/apps/open_notepad.lua b/resources/commands/apps/open_notepad.lua
new file mode 100644
index 0000000..023c4f1
--- /dev/null
+++ b/resources/commands/apps/open_notepad.lua
@@ -0,0 +1,8 @@
+local res = jarvis.system.exec("start \"\" notepad.exe")
+if res.success then
+    jarvis.audio.play_ok()
+else
+    jarvis.log("error", "open notepad failed: " .. tostring(res.stderr))
+    jarvis.audio.play_error()
+end
+return { chain = false }
diff --git a/resources/commands/apps/open_settings.lua b/resources/commands/apps/open_settings.lua
new file mode 100644
index 0000000..786ad13
--- /dev/null
+++ b/resources/commands/apps/open_settings.lua
@@ -0,0 +1,8 @@
+local res = jarvis.system.exec("start \"\" ms-settings:")
+if res.success then
+    jarvis.audio.play_ok()
+else
+    jarvis.log("error", "open settings failed: " .. tostring(res.stderr))
+    jarvis.audio.play_error()
+end
+return { chain = false }
diff --git a/resources/commands/apps/open_task_manager.lua b/resources/commands/apps/open_task_manager.lua
new file mode 100644
index 0000000..b7d0f18
--- /dev/null
+++ b/resources/commands/apps/open_task_manager.lua
@@ -0,0 +1,8 @@
+local res = jarvis.system.exec("start \"\" taskmgr.exe")
+if res.success then
+    jarvis.audio.play_ok()
+else
+    jarvis.log("error", "open task manager failed: " .. tostring(res.stderr))
+    jarvis.audio.play_error()
+end
+return { chain = false }
diff --git a/resources/commands/apps/open_terminal.lua b/resources/commands/apps/open_terminal.lua
new file mode 100644
index 0000000..cf91242
--- /dev/null
+++ b/resources/commands/apps/open_terminal.lua
@@ -0,0 +1,13 @@
+local res = jarvis.system.exec("start \"\" wt.exe")
+if not res.success then
+    jarvis.log("warn", "wt.exe not found, falling back to powershell")
+    res = jarvis.system.exec("start \"\" powershell.exe")
+end
+
+if res.success then
+    jarvis.audio.play_ok()
+else
+    jarvis.log("error", "open terminal failed: " .. tostring(res.stderr))
+    jarvis.audio.play_error()
+end
+return { chain = false }
diff --git a/resources/commands/apps/screenshot.lua b/resources/commands/apps/screenshot.lua
new file mode 100644
index 0000000..4d24243
--- /dev/null
+++ b/resources/commands/apps/screenshot.lua
@@ -0,0 +1,24 @@
+local ts = jarvis.context.time.year .. jarvis.context.time.month .. jarvis.context.time.day
+    .. "_" .. jarvis.context.time.hour .. jarvis.context.time.minute .. jarvis.context.time.second
+
+local userprofile = jarvis.system.env("USERPROFILE") or "C:\\Users\\Public"
+local target = userprofile .. "\\Pictures\\jarvis_screenshot_" .. ts .. ".png"
+
+local ps = string.format(
+    [[Add-Type -AssemblyName System.Windows.Forms,System.Drawing; $b=[System.Windows.Forms.Screen]::PrimaryScreen.Bounds; $bmp=New-Object Drawing.Bitmap $b.Width,$b.Height; $g=[Drawing.Graphics]::FromImage($bmp); $g.CopyFromScreen($b.Location,[Drawing.Point]::Empty,$b.Size); $bmp.Save('%s'); $g.Dispose(); $bmp.Dispose()]],
+    target:gsub("\\", "\\\\")
+)
+
+local cmd = string.format('powershell -NoProfile -ExecutionPolicy Bypass -Command "%s"', ps:gsub('"', '\\"'))
+local res = jarvis.system.exec(cmd)
+
+if res.success then
+    jarvis.log("info", "screenshot saved to " .. target)
+    jarvis.system.notify("Скриншот", target)
+    jarvis.audio.play_ok()
+else
+    jarvis.log("error", "screenshot failed: " .. tostring(res.stderr))
+    jarvis.audio.play_error()
+end
+
+return { chain = false }
diff --git a/resources/commands/file_search/command.toml b/resources/commands/file_search/command.toml
new file mode 100644
index 0000000..f931b14
--- /dev/null
+++ b/resources/commands/file_search/command.toml
@@ -0,0 +1,26 @@
+[[commands]]
+id = "file_search"
+type = "lua"
+script = "search.lua"
+sandbox = "full"
+timeout = 15000
+
+[commands.phrases]
+ru = [
+    "найди файл",
+    "поиск файла",
+    "ищи файл",
+    "где файл",
+    "найди документ",
+]
+en = [
+    "find file",
+    "search file",
+    "where is file",
+    "locate file",
+]
+ua = [
+    "знайди файл",
+    "пошук файлу",
+    "де файл",
+]
diff --git a/resources/commands/file_search/search.lua b/resources/commands/file_search/search.lua
new file mode 100644
index 0000000..40d9365
--- /dev/null
+++ b/resources/commands/file_search/search.lua
@@ -0,0 +1,78 @@
+local lang = jarvis.context.language
+local phrase = (jarvis.context.phrase or ""):lower()
+
+local triggers = {
+    "найди документ", "найди файл", "поиск файла", "ищи файл", "где файл",
+    "find file", "search file", "where is file", "locate file",
+    "знайди файл", "пошук файлу", "де файл",
+}
+
+local query = phrase
+for _, t in ipairs(triggers) do
+    local start, finish = string.find(query, t, 1, true)
+    if start == 1 then
+        query = query:sub(finish + 1)
+        break
+    end
+end
+query = query:gsub("^%s+", ""):gsub("%s+$", "")
+
+if query == "" then
+    jarvis.log("warn", "file_search: empty query (phrase=" .. phrase .. ")")
+    jarvis.system.notify(
+        lang == "ru" and "Поиск файлов" or "File search",
+        lang == "ru" and "Что искать?" or "What to search for?"
+    )
+    jarvis.audio.play_error()
+    return { chain = false }
+end
+
+local userprofile = jarvis.system.env("USERPROFILE") or "C:\\Users\\Public"
+local roots = {
+    userprofile .. "\\Desktop",
+    userprofile .. "\\Documents",
+    userprofile .. "\\Downloads",
+}
+
+local escaped = query:gsub("'", "''")
+local roots_arg = "'" .. table.concat(roots, "','") .. "'"
+local ps = string.format(
+    [[$ErrorActionPreference='SilentlyContinue'; $r=@(%s); $q='*%s*'; $hits=Get-ChildItem -Path $r -Filter $q -Recurse -Depth 3 -File | Select-Object -First 5; foreach($h in $hits){ Write-Output $h.FullName }]],
+    roots_arg, escaped
+)
+
+local cmd = string.format('powershell -NoProfile -ExecutionPolicy Bypass -Command "%s"', ps:gsub('"', '\\"'))
+jarvis.log("info", "file_search query='" .. query .. "'")
+
+local res = jarvis.system.exec(cmd)
+
+if not res.success then
+    jarvis.log("error", "file_search exec failed: " .. tostring(res.stderr))
+    jarvis.audio.play_error()
+    return { chain = false }
+end
+
+local stdout = res.stdout or ""
+local lines = {}
+for line in stdout:gmatch("[^\r\n]+") do
+    if line ~= "" then table.insert(lines, line) end
+end
+
+if #lines == 0 then
+    jarvis.system.notify(
+        lang == "ru" and "Поиск файлов" or "File search",
+        (lang == "ru" and "Не найдено: " or "Not found: ") .. query
+    )
+    jarvis.audio.play_not_found()
+else
+    local first = lines[1]
+    local count = #lines
+    local title = lang == "ru" and "Найдено файлов: " or "Files found: "
+    jarvis.system.notify(title .. count, first)
+
+    jarvis.log("info", "file_search opening: " .. first)
+    jarvis.system.exec(string.format('explorer.exe /select,"%s"', first))
+    jarvis.audio.play_ok()
+end
+
+return { chain = false }
diff --git a/resources/commands/output_device/_audio_devices.ps1 b/resources/commands/output_device/_audio_devices.ps1
new file mode 100644
index 0000000..2cf76e9
--- /dev/null
+++ b/resources/commands/output_device/_audio_devices.ps1
@@ -0,0 +1,195 @@
+param(
+    [Parameter(Mandatory=$true)]
+    [ValidateSet("list","set","next","current")]
+    [string]$Action,
+
+    [int]$Index = -1
+)
+
+$ErrorActionPreference = 'Stop'
+
+Add-Type -TypeDefinition @'
+using System;
+using System.Collections.Generic;
+using System.Runtime.InteropServices;
+
+namespace JarvisAudio
+{
+    [Guid("A95664D2-9614-4F35-A746-DE8DB63617E6"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
+    public interface IMMDeviceEnumerator
+    {
+        [PreserveSig] int EnumAudioEndpoints(int dataFlow, int stateMask, out IMMDeviceCollection devices);
+        [PreserveSig] int GetDefaultAudioEndpoint(int dataFlow, int role, out IMMDevice device);
+        [PreserveSig] int GetDevice([MarshalAs(UnmanagedType.LPWStr)] string id, out IMMDevice device);
+    }
+
+    [Guid("0BD7A1BE-7A1A-44DB-8397-CC5392387B5E"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
+    public interface IMMDeviceCollection
+    {
+        [PreserveSig] int GetCount(out int count);
+        [PreserveSig] int Item(int idx, out IMMDevice device);
+    }
+
+    [Guid("D666063F-1587-4E43-81F1-B948E807363F"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
+    public interface IMMDevice
+    {
+        [PreserveSig] int Activate(ref Guid iid, int clsCtx, IntPtr activationParams, [MarshalAs(UnmanagedType.IUnknown)] out object iface);
+        [PreserveSig] int OpenPropertyStore(int access, out IPropertyStore store);
+        [PreserveSig] int GetId([MarshalAs(UnmanagedType.LPWStr)] out string id);
+        [PreserveSig] int GetState(out int state);
+    }
+
+    [Guid("886D8EEB-8CF2-4446-8D02-CDBA1DBDCF99"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
+    public interface IPropertyStore
+    {
+        [PreserveSig] int GetCount(out int count);
+        [PreserveSig] int GetAt(int idx, out PROPERTYKEY key);
+        [PreserveSig] int GetValue(ref PROPERTYKEY key, out PROPVARIANT value);
+    }
+
+    [StructLayout(LayoutKind.Sequential)]
+    public struct PROPERTYKEY
+    {
+        public Guid formatId;
+        public int propertyId;
+    }
+
+    [StructLayout(LayoutKind.Sequential)]
+    public struct PROPVARIANT
+    {
+        public ushort vt;
+        public ushort r1;
+        public ushort r2;
+        public ushort r3;
+        public IntPtr p;
+        public IntPtr p2;
+    }
+
+    [ComImport, Guid("BCDE0395-E52F-467C-8E3D-C4579291692E")]
+    public class MMDeviceEnumerator {}
+
+    [Guid("F8679F50-850A-41CF-9C72-430F290290C8"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
+    public interface IPolicyConfig
+    {
+        [PreserveSig] int GetMixFormat();
+        [PreserveSig] int GetDeviceFormat();
+        [PreserveSig] int ResetDeviceFormat();
+        [PreserveSig] int SetDeviceFormat();
+        [PreserveSig] int GetProcessingPeriod();
+        [PreserveSig] int SetProcessingPeriod();
+        [PreserveSig] int GetShareMode();
+        [PreserveSig] int SetShareMode();
+        [PreserveSig] int GetPropertyValue();
+        [PreserveSig] int SetPropertyValue();
+        [PreserveSig] int SetDefaultEndpoint([MarshalAs(UnmanagedType.LPWStr)] string deviceId, uint role);
+        [PreserveSig] int SetEndpointVisibility();
+    }
+
+    [ComImport, Guid("870AF99C-171D-4F9E-AF0D-E63DF40C2BC9")]
+    public class PolicyConfigClient {}
+
+    public class Device
+    {
+        public string Id { get; set; }
+        public string Name { get; set; }
+    }
+
+    public static class Manager
+    {
+        const int eRender = 0;
+        const int DEVICE_STATE_ACTIVE = 1;
+
+        static PROPERTYKEY PKEY_Device_FriendlyName = new PROPERTYKEY {
+            formatId = new Guid("a45c254e-df1c-4efd-8020-67d146a850e0"),
+            propertyId = 14
+        };
+
+        public static List<Device> ListRender()
+        {
+            var enumr = (IMMDeviceEnumerator)new MMDeviceEnumerator();
+            IMMDeviceCollection coll;
+            int hr = enumr.EnumAudioEndpoints(eRender, DEVICE_STATE_ACTIVE, out coll);
+            if (hr != 0) throw new Exception("EnumAudioEndpoints failed: 0x" + hr.ToString("X"));
+
+            int count;
+            coll.GetCount(out count);
+
+            var result = new List<Device>();
+            for (int i = 0; i < count; i++)
+            {
+                IMMDevice dev;
+                coll.Item(i, out dev);
+                string id;
+                dev.GetId(out id);
+
+                IPropertyStore store;
+                dev.OpenPropertyStore(0, out store);
+
+                PROPVARIANT v;
+                store.GetValue(ref PKEY_Device_FriendlyName, out v);
+                string name = v.p != IntPtr.Zero ? Marshal.PtrToStringUni(v.p) : "(unknown)";
+
+                result.Add(new Device { Id = id, Name = name });
+            }
+            return result;
+        }
+
+        public static string GetDefaultRenderId()
+        {
+            var enumr = (IMMDeviceEnumerator)new MMDeviceEnumerator();
+            IMMDevice dev;
+            int hr = enumr.GetDefaultAudioEndpoint(eRender, 0, out dev); // eConsole = 0
+            if (hr != 0) return null;
+            string id;
+            dev.GetId(out id);
+            return id;
+        }
+
+        public static void SetDefault(string deviceId)
+        {
+            var cfg = (IPolicyConfig)new PolicyConfigClient();
+            cfg.SetDefaultEndpoint(deviceId, 0); // eConsole
+            cfg.SetDefaultEndpoint(deviceId, 1); // eMultimedia
+            cfg.SetDefaultEndpoint(deviceId, 2); // eCommunications
+        }
+    }
+}
+'@ -Language CSharp
+
+$devs = [JarvisAudio.Manager]::ListRender()
+
+switch ($Action) {
+    "list" {
+        for ($i = 0; $i -lt $devs.Count; $i++) {
+            Write-Output ("{0}`t{1}" -f $i, $devs[$i].Name)
+        }
+    }
+    "current" {
+        $cur = [JarvisAudio.Manager]::GetDefaultRenderId()
+        for ($i = 0; $i -lt $devs.Count; $i++) {
+            if ($devs[$i].Id -eq $cur) {
+                Write-Output ("{0}`t{1}" -f $i, $devs[$i].Name)
+                return
+            }
+        }
+        Write-Output "-1`t(unknown)"
+    }
+    "set" {
+        if ($Index -lt 0 -or $Index -ge $devs.Count) {
+            Write-Error "Index out of range: $Index (have $($devs.Count) devices)"
+            exit 2
+        }
+        [JarvisAudio.Manager]::SetDefault($devs[$Index].Id)
+        Write-Output ("OK`t{0}" -f $devs[$Index].Name)
+    }
+    "next" {
+        $cur = [JarvisAudio.Manager]::GetDefaultRenderId()
+        $curIdx = -1
+        for ($i = 0; $i -lt $devs.Count; $i++) {
+            if ($devs[$i].Id -eq $cur) { $curIdx = $i; break }
+        }
+        $nextIdx = ($curIdx + 1) % $devs.Count
+        [JarvisAudio.Manager]::SetDefault($devs[$nextIdx].Id)
+        Write-Output ("OK`t{0}" -f $devs[$nextIdx].Name)
+    }
+}
diff --git a/resources/commands/output_device/command.toml b/resources/commands/output_device/command.toml
new file mode 100644
index 0000000..422687b
--- /dev/null
+++ b/resources/commands/output_device/command.toml
@@ -0,0 +1,55 @@
+[[commands]]
+id = "list_output_devices"
+type = "lua"
+script = "list_devices.lua"
+sandbox = "full"
+timeout = 8000
+
+[commands.phrases]
+ru = [
+    "какие устройства вывода",
+    "покажи устройства",
+    "список устройств",
+    "какие наушники",
+    "какие колонки",
+]
+en = [
+    "list output devices",
+    "show audio devices",
+    "list speakers",
+    "what audio devices",
+]
+ua = [
+    "які пристрої виводу",
+    "покажи пристрої",
+    "список пристроїв",
+]
+
+
+[[commands]]
+id = "next_output_device"
+type = "lua"
+script = "next_device.lua"
+sandbox = "full"
+timeout = 8000
+
+[commands.phrases]
+ru = [
+    "переключи устройство",
+    "переключи звук",
+    "следующее устройство",
+    "смени вывод",
+    "переключи на наушники",
+    "переключи на колонки",
+]
+en = [
+    "switch audio device",
+    "next audio device",
+    "switch output",
+    "switch speakers",
+]
+ua = [
+    "перемкни пристрій",
+    "перемкни звук",
+    "наступний пристрій",
+]
diff --git a/resources/commands/output_device/list_devices.lua b/resources/commands/output_device/list_devices.lua
new file mode 100644
index 0000000..aefc6b2
--- /dev/null
+++ b/resources/commands/output_device/list_devices.lua
@@ -0,0 +1,31 @@
+local lang = jarvis.context.language
+local helper = jarvis.context.command_path .. "\\_audio_devices.ps1"
+local cmd = string.format(
+    'powershell -NoProfile -ExecutionPolicy Bypass -File "%s" -Action list',
+    helper
+)
+
+local res = jarvis.system.exec(cmd)
+if not res.success then
+    jarvis.log("error", "list devices failed: " .. tostring(res.stderr))
+    jarvis.audio.play_error()
+    return { chain = false }
+end
+
+local lines = {}
+for line in (res.stdout or ""):gmatch("[^\r\n]+") do
+    if line ~= "" then table.insert(lines, line) end
+end
+
+local title = lang == "ru" and "Устройства вывода" or "Output devices"
+local body
+if #lines == 0 then
+    body = lang == "ru" and "Активных устройств не найдено" or "No active devices"
+else
+    body = table.concat(lines, "\n")
+end
+
+jarvis.system.notify(title, body)
+jarvis.log("info", "audio devices: " .. body)
+jarvis.audio.play_ok()
+return { chain = false }
diff --git a/resources/commands/output_device/next_device.lua b/resources/commands/output_device/next_device.lua
new file mode 100644
index 0000000..852462a
--- /dev/null
+++ b/resources/commands/output_device/next_device.lua
@@ -0,0 +1,22 @@
+local lang = jarvis.context.language
+local helper = jarvis.context.command_path .. "\\_audio_devices.ps1"
+local cmd = string.format(
+    'powershell -NoProfile -ExecutionPolicy Bypass -File "%s" -Action next',
+    helper
+)
+
+local res = jarvis.system.exec(cmd)
+if not res.success then
+    jarvis.log("error", "next device failed: " .. tostring(res.stderr))
+    jarvis.audio.play_error()
+    return { chain = false }
+end
+
+local out = (res.stdout or ""):gsub("[\r\n]+$", "")
+local name = out:match("^OK\t(.+)$") or out
+
+local title = lang == "ru" and "Аудио переключено" or "Audio switched"
+jarvis.system.notify(title, name)
+jarvis.log("info", "audio switched to: " .. name)
+jarvis.audio.play_ok()
+return { chain = false }
diff --git a/resources/commands/volume/_volume_helper.ps1 b/resources/commands/volume/_volume_helper.ps1
new file mode 100644
index 0000000..3cc0161
--- /dev/null
+++ b/resources/commands/volume/_volume_helper.ps1
@@ -0,0 +1,31 @@
+param(
+    [Parameter(Mandatory=$true)]
+    [ValidateSet("up","down","mute","max")]
+    [string]$Action,
+
+    [int]$Times = 1
+)
+
+Add-Type -Name VolumeKey -Namespace Win32 -MemberDefinition @'
+[DllImport("user32.dll")]
+public static extern void keybd_event(byte bVk, byte bScan, uint dwFlags, System.UIntPtr dwExtraInfo);
+'@
+
+$KEY_UP   = 0xAF
+$KEY_DOWN = 0xAE
+$KEY_MUTE = 0xAD
+
+$vk = switch ($Action) {
+    "up"   { $KEY_UP }
+    "down" { $KEY_DOWN }
+    "mute" { $KEY_MUTE }
+    "max"  { $KEY_UP }
+}
+
+$count = if ($Action -eq "max") { 50 } else { $Times }
+
+for ($i = 0; $i -lt $count; $i++) {
+    [Win32.VolumeKey]::keybd_event($vk, 0, 0, [UIntPtr]::Zero)
+    [Win32.VolumeKey]::keybd_event($vk, 0, 2, [UIntPtr]::Zero)
+    Start-Sleep -Milliseconds 25
+}
diff --git a/resources/commands/volume/command.toml b/resources/commands/volume/command.toml
new file mode 100644
index 0000000..288af96
--- /dev/null
+++ b/resources/commands/volume/command.toml
@@ -0,0 +1,106 @@
+[[commands]]
+id = "volume_up"
+type = "lua"
+script = "volume_up.lua"
+sandbox = "full"
+timeout = 3000
+
+[commands.phrases]
+ru = [
+    "громче",
+    "сделай громче",
+    "прибавь звук",
+    "увеличь громкость",
+    "погромче",
+]
+en = [
+    "louder",
+    "volume up",
+    "increase volume",
+    "turn it up",
+]
+ua = [
+    "голосніше",
+    "зроби голосніше",
+    "збільш гучність",
+]
+
+
+[[commands]]
+id = "volume_down"
+type = "lua"
+script = "volume_down.lua"
+sandbox = "full"
+timeout = 3000
+
+[commands.phrases]
+ru = [
+    "тише",
+    "сделай тише",
+    "убавь звук",
+    "уменьши громкость",
+    "потише",
+]
+en = [
+    "quieter",
+    "volume down",
+    "decrease volume",
+    "turn it down",
+]
+ua = [
+    "тихіше",
+    "зроби тихіше",
+    "зменш гучність",
+]
+
+
+[[commands]]
+id = "volume_mute"
+type = "lua"
+script = "volume_mute.lua"
+sandbox = "full"
+timeout = 3000
+
+[commands.phrases]
+ru = [
+    "выключи звук",
+    "заткнись",
+    "тишина",
+    "приглуши звук",
+    "отключи звук",
+]
+en = [
+    "mute",
+    "silence",
+    "shut up",
+    "be quiet",
+]
+ua = [
+    "вимкни звук",
+    "тиша",
+    "стихни",
+]
+
+
+[[commands]]
+id = "volume_max"
+type = "lua"
+script = "volume_max.lua"
+sandbox = "full"
+timeout = 3000
+
+[commands.phrases]
+ru = [
+    "максимальная громкость",
+    "звук на максимум",
+    "на полную",
+]
+en = [
+    "max volume",
+    "full volume",
+    "maximum",
+]
+ua = [
+    "максимальна гучність",
+    "звук на максимум",
+]
diff --git a/resources/commands/volume/volume_down.lua b/resources/commands/volume/volume_down.lua
new file mode 100644
index 0000000..db0f7f7
--- /dev/null
+++ b/resources/commands/volume/volume_down.lua
@@ -0,0 +1,16 @@
+local helper = jarvis.context.command_path .. "\\_volume_helper.ps1"
+local cmd = string.format(
+    'powershell -NoProfile -ExecutionPolicy Bypass -File "%s" -Action down -Times 5',
+    helper
+)
+
+local res = jarvis.system.exec(cmd)
+if res.success then
+    jarvis.log("info", "volume down")
+    jarvis.audio.play_ok()
+else
+    jarvis.log("error", "volume down failed: code=" .. tostring(res.code) .. " stderr=" .. tostring(res.stderr))
+    jarvis.audio.play_error()
+end
+
+return { chain = false }
diff --git a/resources/commands/volume/volume_max.lua b/resources/commands/volume/volume_max.lua
new file mode 100644
index 0000000..7935502
--- /dev/null
+++ b/resources/commands/volume/volume_max.lua
@@ -0,0 +1,16 @@
+local helper = jarvis.context.command_path .. "\\_volume_helper.ps1"
+local cmd = string.format(
+    'powershell -NoProfile -ExecutionPolicy Bypass -File "%s" -Action max',
+    helper
+)
+
+local res = jarvis.system.exec(cmd)
+if res.success then
+    jarvis.log("info", "volume max")
+    jarvis.audio.play_ok()
+else
+    jarvis.log("error", "volume max failed: code=" .. tostring(res.code) .. " stderr=" .. tostring(res.stderr))
+    jarvis.audio.play_error()
+end
+
+return { chain = false }
diff --git a/resources/commands/volume/volume_mute.lua b/resources/commands/volume/volume_mute.lua
new file mode 100644
index 0000000..bb29bdb
--- /dev/null
+++ b/resources/commands/volume/volume_mute.lua
@@ -0,0 +1,16 @@
+local helper = jarvis.context.command_path .. "\\_volume_helper.ps1"
+local cmd = string.format(
+    'powershell -NoProfile -ExecutionPolicy Bypass -File "%s" -Action mute',
+    helper
+)
+
+local res = jarvis.system.exec(cmd)
+if res.success then
+    jarvis.log("info", "mute toggled")
+    jarvis.audio.play_ok()
+else
+    jarvis.log("error", "mute failed: code=" .. tostring(res.code) .. " stderr=" .. tostring(res.stderr))
+    jarvis.audio.play_error()
+end
+
+return { chain = false }
diff --git a/resources/commands/volume/volume_up.lua b/resources/commands/volume/volume_up.lua
new file mode 100644
index 0000000..0561954
--- /dev/null
+++ b/resources/commands/volume/volume_up.lua
@@ -0,0 +1,16 @@
+local helper = jarvis.context.command_path .. "\\_volume_helper.ps1"
+local cmd = string.format(
+    'powershell -NoProfile -ExecutionPolicy Bypass -File "%s" -Action up -Times 5',
+    helper
+)
+
+local res = jarvis.system.exec(cmd)
+if res.success then
+    jarvis.log("info", "volume up")
+    jarvis.audio.play_ok()
+else
+    jarvis.log("error", "volume up failed: code=" .. tostring(res.code) .. " stderr=" .. tostring(res.stderr))
+    jarvis.audio.play_error()
+end
+
+return { chain = false }