diff --git a/resources/commands/math/command.toml b/resources/commands/math/command.toml
new file mode 100644
index 0000000..131fcc1
--- /dev/null
+++ b/resources/commands/math/command.toml
@@ -0,0 +1,27 @@
+[[commands]]
+id = "math_eval"
+type = "lua"
+script = "math.lua"
+sandbox = "full"
+timeout = 15000
+
+[commands.phrases]
+ru = [
+    "посчитай",
+    "сколько будет",
+    "вычисли",
+    "реши",
+    "сколько это",
+]
+en = [
+    "calculate",
+    "how much is",
+    "compute",
+    "solve",
+    "what is",
+]
+ua = [
+    "порахуй",
+    "скільки буде",
+    "обчисли",
+]
diff --git a/resources/commands/math/math.lua b/resources/commands/math/math.lua
new file mode 100644
index 0000000..cd45d54
--- /dev/null
+++ b/resources/commands/math/math.lua
@@ -0,0 +1,87 @@
+local lang = jarvis.context.language
+local phrase = (jarvis.context.phrase or ""):lower()
+
+local triggers = {
+    "сколько будет", "сколько это", "посчитай", "вычисли", "реши",
+    "how much is", "calculate", "compute", "solve", "what is",
+    "скільки буде", "порахуй", "обчисли",
+}
+
+local query = phrase
+for _, t in ipairs(triggers) do
+    local s, e = string.find(query, t, 1, true)
+    if s == 1 then
+        query = query:sub(e + 1)
+        break
+    end
+end
+query = query:gsub("^%s+", ""):gsub("%s+$", "")
+
+if query == "" then
+    jarvis.system.notify("Math", lang == "ru" and "Что посчитать?" or "What to compute?")
+    jarvis.audio.play_error()
+    return { chain = false }
+end
+
+local token = jarvis.system.env("GROQ_TOKEN")
+if not token or token == "" then
+    jarvis.system.notify("Math", "GROQ_TOKEN не задан")
+    jarvis.audio.play_error()
+    return { chain = false }
+end
+
+local base  = jarvis.system.env("GROQ_BASE_URL"); if not base or base == "" then base = "https://api.groq.com/openai/v1" end
+local model = jarvis.system.env("GROQ_MODEL");    if not model or model == "" then model = "llama-3.3-70b-versatile" end
+
+local sys = "Ты калькулятор. Решай арифметику, простые уравнения, конверсии единиц, проценты. "
+    .. "Отвечай ТОЛЬКО результатом числом или короткой строкой (для уравнений — значения корней). "
+    .. "Если запрос — не математика, ответь одним словом «нет»."
+
+local payload = {
+    model = model,
+    messages = {
+        { role = "system", content = sys },
+        { role = "user",   content = query },
+    },
+    max_tokens = 64,
+    temperature = 0.0,
+}
+
+jarvis.log("info", "math query: " .. query)
+local res = jarvis.http.post_json(base .. "/chat/completions", payload, { Authorization = "Bearer " .. token })
+
+if not res.ok then
+    jarvis.log("error", "math api failed: " .. tostring(res.status))
+    jarvis.system.notify("Math", "Ошибка API")
+    jarvis.audio.play_error()
+    return { chain = false }
+end
+
+local body = res.body or ""
+local content = body:match('"content"%s*:%s*"(.-[^\\])"')
+if not content then
+    jarvis.system.notify("Math", "Не смог распарсить ответ")
+    jarvis.audio.play_error()
+    return { chain = false }
+end
+content = content:gsub('\\n', '\n'):gsub('\\"', '"'):gsub('\\\\', '\\'):gsub('\\t', '\t')
+content = content:gsub("^%s+", ""):gsub("%s+$", "")
+
+if content:lower() == "нет" or content == "" then
+    jarvis.system.notify("Math", lang == "ru" and "Это не математика" or "Not math")
+    jarvis.audio.play_not_found()
+    return { chain = false }
+end
+
+jarvis.system.notify(query, content)
+jarvis.log("info", "math result: " .. content)
+
+local sapi_text = ((lang == "ru" and "Получилось " or "Result: ") .. content):gsub("'", "''"):gsub("\r?\n", " ")
+local ps = string.format(
+    [[Add-Type -AssemblyName System.Speech; $s = New-Object System.Speech.Synthesis.SpeechSynthesizer; foreach ($v in $s.GetInstalledVoices()) { if ($v.VoiceInfo.Culture.TwoLetterISOLanguageName -eq 'ru') { try { $s.SelectVoice($v.VoiceInfo.Name); break } catch {} } } $s.Speak('%s')]],
+    sapi_text
+)
+jarvis.system.exec(string.format('powershell -NoProfile -ExecutionPolicy Bypass -Command "%s"', ps:gsub('"', '\\"')))
+
+jarvis.audio.play_ok()
+return { chain = false }
diff --git a/resources/commands/projects/command.toml b/resources/commands/projects/command.toml
new file mode 100644
index 0000000..95d8151
--- /dev/null
+++ b/resources/commands/projects/command.toml
@@ -0,0 +1,36 @@
+[[commands]]
+id = "open_project"
+type = "lua"
+script = "open.lua"
+sandbox = "full"
+timeout = 5000
+
+[commands.phrases]
+ru = [
+    "открой проект",
+    "запусти проект",
+    "проект",
+    "открой папку проекта",
+]
+en = [
+    "open project",
+    "launch project",
+    "project",
+]
+ua = [
+    "відкрий проект",
+    "запусти проект",
+]
+
+
+[[commands]]
+id = "list_projects"
+type = "lua"
+script = "list.lua"
+sandbox = "full"
+timeout = 5000
+
+[commands.phrases]
+ru = ["какие у меня проекты", "список проектов", "покажи проекты"]
+en = ["list projects", "show projects"]
+ua = ["які в мене проекти", "перелік проектів"]
diff --git a/resources/commands/projects/list.lua b/resources/commands/projects/list.lua
new file mode 100644
index 0000000..fd06507
--- /dev/null
+++ b/resources/commands/projects/list.lua
@@ -0,0 +1,34 @@
+local lang = jarvis.context.language
+local userprofile = jarvis.system.env("USERPROFILE") or "C:\\Users\\Public"
+local config_path = userprofile .. "\\Documents\\jarvis-projects.json"
+
+if not jarvis.fs.exists(config_path) then
+    jarvis.system.notify(
+        lang == "ru" and "Проекты" or "Projects",
+        lang == "ru" and "Конфиг ещё не создан — скажи «открой проект» один раз"
+                      or "Config not created yet — say 'open project' once"
+    )
+    jarvis.audio.play_not_found()
+    return { chain = false }
+end
+
+local content = jarvis.fs.read(config_path)
+local names = {}
+for name in content:gmatch('"name"%s*:%s*"([^"]+)"') do
+    table.insert(names, name)
+end
+
+if #names == 0 then
+    jarvis.system.notify("Projects", lang == "ru" and "Список пуст" or "Empty")
+    jarvis.audio.play_not_found()
+    return { chain = false }
+end
+
+local body = table.concat(names, ", ")
+jarvis.system.notify(
+    (lang == "ru" and "Проектов: " or "Projects: ") .. #names,
+    body
+)
+jarvis.log("info", "projects: " .. body)
+jarvis.audio.play_ok()
+return { chain = false }
diff --git a/resources/commands/projects/open.lua b/resources/commands/projects/open.lua
new file mode 100644
index 0000000..e269ec3
--- /dev/null
+++ b/resources/commands/projects/open.lua
@@ -0,0 +1,97 @@
+local lang = jarvis.context.language
+local userprofile = jarvis.system.env("USERPROFILE") or "C:\\Users\\Public"
+local config_path = userprofile .. "\\Documents\\jarvis-projects.json"
+
+if not jarvis.fs.exists(config_path) then
+    local sample = string.format([[[
+  {"name": "jarvis-rust",  "path": "%s\\Jarvis\\rust"},
+  {"name": "jarvis-python", "path": "%s\\Jarvis\\python"},
+  {"name": "dietpi",        "path": "%s\\Desktop\\Dietpi"}
+]
+]], userprofile, userprofile, userprofile)
+    jarvis.fs.write(config_path, sample)
+    jarvis.system.notify(
+        lang == "ru" and "Проекты" or "Projects",
+        lang == "ru" and "Создан шаблон в Documents/jarvis-projects.json — отредактируй и повтори"
+                      or "Template created at Documents/jarvis-projects.json — edit and retry"
+    )
+    jarvis.system.open(config_path)
+    jarvis.audio.play_not_found()
+    return { chain = false }
+end
+
+local content = jarvis.fs.read(config_path)
+
+local entries = {}
+for name, path in content:gmatch('"name"%s*:%s*"([^"]+)"%s*,%s*"path"%s*:%s*"([^"]+)"') do
+    table.insert(entries, { name = name:lower(), original_name = name, path = path:gsub('\\\\', '\\') })
+end
+
+if #entries == 0 then
+    jarvis.system.notify("Projects", lang == "ru" and "Проектов в конфиге не нашёл" or "No projects in config")
+    jarvis.audio.play_not_found()
+    return { chain = false }
+end
+
+local phrase = (jarvis.context.phrase or ""):lower()
+local triggers = {
+    "открой папку проекта", "запусти проект", "открой проект", "проект",
+    "open project", "launch project", "project",
+    "відкрий проект", "запусти проект",
+}
+local query = phrase
+for _, t in ipairs(triggers) do
+    local s, e = string.find(query, t, 1, true)
+    if s == 1 then
+        query = query:sub(e + 1)
+        break
+    end
+end
+query = query:gsub("^%s+", ""):gsub("%s+$", "")
+
+if query == "" then
+    jarvis.system.notify("Projects", lang == "ru" and "Какой проект?" or "Which project?")
+    jarvis.audio.play_error()
+    return { chain = false }
+end
+
+local match = nil
+for _, e in ipairs(entries) do
+    if e.name == query then match = e; break end
+end
+if not match then
+    for _, e in ipairs(entries) do
+        if string.find(e.name, query, 1, true) or string.find(query, e.name, 1, true) then
+            match = e; break
+        end
+    end
+end
+
+if not match then
+    jarvis.system.notify("Projects",
+        (lang == "ru" and "Не нашёл: " or "Not found: ") .. query)
+    jarvis.audio.play_not_found()
+    return { chain = false }
+end
+
+if not jarvis.fs.exists(match.path) then
+    jarvis.system.notify("Projects",
+        (lang == "ru" and "Путь не существует: " or "Path missing: ") .. match.path)
+    jarvis.audio.play_error()
+    return { chain = false }
+end
+
+local code_check = jarvis.system.exec("where code.cmd")
+if code_check.success and (code_check.stdout or ""):gsub("[\r\n]+$", "") ~= "" then
+    jarvis.system.exec(string.format('code "%s"', match.path))
+else
+    jarvis.system.open(match.path)
+end
+
+jarvis.system.notify(
+    lang == "ru" and "Проект" or "Project",
+    match.original_name .. "\n" .. match.path
+)
+jarvis.log("info", "opened project: " .. match.original_name .. " at " .. match.path)
+jarvis.audio.play_ok()
+return { chain = false }
diff --git a/resources/commands/sound_panel/command.toml b/resources/commands/sound_panel/command.toml
new file mode 100644
index 0000000..de6e883
--- /dev/null
+++ b/resources/commands/sound_panel/command.toml
@@ -0,0 +1,23 @@
+[[commands]]
+id = "open_sound_panel"
+type = "lua"
+script = "open.lua"
+sandbox = "full"
+timeout = 3000
+
+[commands.phrases]
+ru = [
+    "открой настройки звука",
+    "панель звука",
+    "настройки микрофона",
+    "управление звуком",
+]
+en = [
+    "open sound settings",
+    "sound panel",
+    "microphone settings",
+]
+ua = [
+    "відкрий налаштування звуку",
+    "панель звуку",
+]
diff --git a/resources/commands/sound_panel/open.lua b/resources/commands/sound_panel/open.lua
new file mode 100644
index 0000000..d13187b
--- /dev/null
+++ b/resources/commands/sound_panel/open.lua
@@ -0,0 +1,3 @@
+jarvis.system.exec('rundll32.exe shell32.dll,Control_RunDLL mmsys.cpl,,1')
+jarvis.audio.play_ok()
+return { chain = false }
diff --git a/resources/commands/theme/command.toml b/resources/commands/theme/command.toml
new file mode 100644
index 0000000..c2ede93
--- /dev/null
+++ b/resources/commands/theme/command.toml
@@ -0,0 +1,24 @@
+[[commands]]
+id = "theme_dark"
+type = "lua"
+script = "set.lua"
+sandbox = "full"
+timeout = 3000
+
+[commands.phrases]
+ru = ["тёмная тема", "темная тема", "включи тёмную тему", "тёмный режим", "темный режим"]
+en = ["dark theme", "dark mode", "enable dark mode"]
+ua = ["темна тема", "темний режим"]
+
+
+[[commands]]
+id = "theme_light"
+type = "lua"
+script = "set.lua"
+sandbox = "full"
+timeout = 3000
+
+[commands.phrases]
+ru = ["светлая тема", "включи светлую тему", "светлый режим"]
+en = ["light theme", "light mode", "enable light mode"]
+ua = ["світла тема", "світлий режим"]
diff --git a/resources/commands/theme/set.lua b/resources/commands/theme/set.lua
new file mode 100644
index 0000000..8c8e850
--- /dev/null
+++ b/resources/commands/theme/set.lua
@@ -0,0 +1,26 @@
+local cmd_id = jarvis.context.command_id
+local lang = jarvis.context.language
+local is_light = (cmd_id == "theme_light")
+local value = is_light and 1 or 0
+
+local key = [[HKCU\Software\Microsoft\Windows\CurrentVersion\Themes\Personalize]]
+local ps = string.format(
+    "Set-ItemProperty -Path 'Registry::%s' -Name AppsUseLightTheme -Value %d -Type DWord; "
+    .. "Set-ItemProperty -Path 'Registry::%s' -Name SystemUsesLightTheme -Value %d -Type DWord",
+    key, value, key, value
+)
+local res = jarvis.system.exec(string.format('powershell -NoProfile -Command "%s"', ps:gsub('"', '\\"')))
+
+if res.success then
+    jarvis.system.notify(
+        lang == "ru" and "Тема" or "Theme",
+        is_light and (lang == "ru" and "Светлая включена" or "Light enabled")
+                  or (lang == "ru" and "Тёмная включена" or "Dark enabled")
+    )
+    jarvis.audio.play_ok()
+else
+    jarvis.log("error", "theme set failed: " .. tostring(res.stderr))
+    jarvis.audio.play_error()
+end
+
+return { chain = false }
diff --git a/resources/commands/translate/command.toml b/resources/commands/translate/command.toml
new file mode 100644
index 0000000..e4fdda0
--- /dev/null
+++ b/resources/commands/translate/command.toml
@@ -0,0 +1,34 @@
+[[commands]]
+id = "translate"
+type = "lua"
+script = "translate.lua"
+sandbox = "full"
+timeout = 20000
+
+[commands.phrases]
+ru = [
+    "переведи на английский",
+    "переведи на русский",
+    "переведи на украинский",
+    "переведи на немецкий",
+    "переведи на французский",
+    "переведи на испанский",
+    "переведи на китайский",
+    "переведи на японский",
+    "переведи",
+    "как по английски",
+    "как по русски",
+    "как по немецки",
+]
+en = [
+    "translate to english",
+    "translate to russian",
+    "translate to ukrainian",
+    "translate",
+    "how to say in",
+]
+ua = [
+    "переклади на англійську",
+    "переклади на російську",
+    "переклади",
+]
diff --git a/resources/commands/translate/translate.lua b/resources/commands/translate/translate.lua
new file mode 100644
index 0000000..2e04925
--- /dev/null
+++ b/resources/commands/translate/translate.lua
@@ -0,0 +1,124 @@
+local lang = jarvis.context.language
+local phrase = (jarvis.context.phrase or ""):lower()
+
+local target_languages = {
+    ["английский"] = "English",         ["english"] = "English",
+    ["русский"]    = "Russian",         ["russian"] = "Russian",
+    ["украинский"] = "Ukrainian",       ["ukrainian"] = "Ukrainian", ["українську"] = "Ukrainian",
+    ["немецкий"]   = "German",          ["german"] = "German",       ["німецьку"]   = "German",
+    ["французский"]= "French",          ["french"] = "French",
+    ["испанский"]  = "Spanish",         ["spanish"] = "Spanish",
+    ["итальянский"]= "Italian",
+    ["китайский"]  = "Chinese",         ["chinese"] = "Chinese",
+    ["японский"]   = "Japanese",        ["japanese"] = "Japanese",
+    ["польский"]   = "Polish",
+    ["турецкий"]   = "Turkish",
+}
+
+local triggers_with_lang = {
+    "переведи на ", "translate to ", "переклади на ", "how to say in ",
+}
+local generic_triggers = {
+    "переведи", "translate", "переклади", "как по ", "how to say",
+}
+
+local target = nil
+local body = phrase
+
+for _, t in ipairs(triggers_with_lang) do
+    local s, e = string.find(body, t, 1, true)
+    if s == 1 then
+        local rest = body:sub(e + 1)
+        local first_word = rest:match("^(%S+)")
+        if first_word and target_languages[first_word] then
+            target = target_languages[first_word]
+            body = rest:sub(#first_word + 1)
+            break
+        end
+    end
+end
+
+if not target then
+    for _, t in ipairs(generic_triggers) do
+        local s, e = string.find(body, t, 1, true)
+        if s == 1 then
+            body = body:sub(e + 1)
+            break
+        end
+    end
+end
+
+body = body:gsub("^%s+", ""):gsub("%s+$", "")
+
+if body == "" then
+    jarvis.system.notify(
+        "Translate",
+        lang == "ru" and "Что переводить?" or "What to translate?"
+    )
+    jarvis.audio.play_error()
+    return { chain = false }
+end
+
+local token = jarvis.system.env("GROQ_TOKEN")
+if not token or token == "" then
+    jarvis.system.notify("Translate", "GROQ_TOKEN не задан")
+    jarvis.audio.play_error()
+    return { chain = false }
+end
+
+local base  = jarvis.system.env("GROQ_BASE_URL"); if not base or base == "" then base = "https://api.groq.com/openai/v1" end
+local model = jarvis.system.env("GROQ_MODEL");    if not model or model == "" then model = "llama-3.3-70b-versatile" end
+
+local target_label = target or (lang == "ru" and "English" or "Russian")
+local sys = string.format(
+    "You are a professional translator. Translate the user message into %s. "
+    .. "Output ONLY the translation, no explanations, no quotes, no prefix. "
+    .. "Preserve idioms and tone.",
+    target_label
+)
+
+jarvis.log("info", "translate -> " .. target_label .. " : " .. body)
+
+local payload = {
+    model = model,
+    messages = {
+        { role = "system", content = sys },
+        { role = "user",   content = body },
+    },
+    max_tokens = 512,
+    temperature = 0.3,
+}
+local res = jarvis.http.post_json(base .. "/chat/completions", payload, { Authorization = "Bearer " .. token })
+
+if not res.ok then
+    jarvis.log("error", "translate api failed: " .. tostring(res.status) .. " " .. tostring(res.body):sub(1, 200))
+    jarvis.system.notify("Translate", "Ошибка API")
+    jarvis.audio.play_error()
+    return { chain = false }
+end
+
+local body_resp = res.body or ""
+local content = body_resp:match('"content"%s*:%s*"(.-[^\\])"')
+if not content then
+    jarvis.system.notify("Translate", "Не смог распарсить ответ")
+    jarvis.audio.play_error()
+    return { chain = false }
+end
+
+content = content:gsub('\\n', '\n'):gsub('\\"', '"'):gsub('\\\\', '\\'):gsub('\\t', '\t')
+content = content:gsub("^%s+", ""):gsub("%s+$", "")
+
+jarvis.system.clipboard.set(content)
+jarvis.system.notify(target_label, content:sub(1, 200))
+jarvis.log("info", "translation: " .. content)
+
+local sapi_text = content:gsub("'", "''"):gsub("\r?\n", " ")
+local ps = string.format(
+    [[Add-Type -AssemblyName System.Speech; $s = New-Object System.Speech.Synthesis.SpeechSynthesizer; $iso='%s'; foreach ($v in $s.GetInstalledVoices()) { if ($v.VoiceInfo.Culture.TwoLetterISOLanguageName -eq $iso) { try { $s.SelectVoice($v.VoiceInfo.Name); break } catch {} } } $s.Speak('%s')]],
+    (target_label == "Russian" and "ru") or (target_label == "Ukrainian" and "uk") or "en",
+    sapi_text
+)
+jarvis.system.exec(string.format('powershell -NoProfile -ExecutionPolicy Bypass -Command "%s"', ps:gsub('"', '\\"')))
+
+jarvis.audio.play_ok()
+return { chain = false }