-- tracker.start — open a new active session.
local lang = jarvis.context.language or "ru"
local now = jarvis.context.time.timestamp or os.time()

local data = jarvis.state.get("data") or {}
local sessions = data.sessions or {}

if data.current_session_start then
    -- already running — don't overwrite; just acknowledge.
    return jarvis.cmd.ok(lang == "ru"
        and "Уже считаю, сэр."
        or  "Already tracking, sir.")
end

data.current_session_start = now
data.sessions = sessions

jarvis.state.set("data", data)

return jarvis.cmd.ok(lang == "ru"
    and "Отсчёт пошёл."
    or  "Tracking started.")