my half done config for hydra (osx window manager, now https://github.com/sdegutis/mjolnir) using thirds

hydra.lua

-- autostart hydra
autolaunch.set(true)

-- watch for changes
pathwatcher.new(os.getenv("HOME") .. "/.hydra/", hydra.reload):start()

-- notify on start
hydra.alert("Hydra config loaded", 0.5)

-- open a repl
--   the repl is a Lua prompt; type "print('hello world')"
--   when you're in the repl, type "help" to get started
--   almost all readline functionality works in the repl
hotkey.bind({"cmd", "ctrl", "alt"}, "R", repl.open)

-- save the time when updates are checked
function checkforupdates()
  updates.check()
  settings.set('lastcheckedupdates', os.time())
end

-- show a helpful menu
menu.show(function()
    local updatetitles = {[true] = "Install Update", [false] = "Check for Update..."}
    local updatefns = {[true] = updates.install, [false] = checkforupdates}
    local hasupdate = (updates.newversion ~= nil)

    return {
      {title = "Reload Config", fn = hydra.reload},
      {title = "Open REPL", fn = repl.open},
      {title = "-"},
      {title = "About", fn = hydra.showabout},
      {title = updatetitles[hasupdate], fn = updatefns[hasupdate]},
      {title = "Quit Hydra", fn = os.exit},
    }
end)

function movewindow(direction)
  return function()
    local win = window.focusedwindow()
    local newframe = win:screen():frame_without_dock_or_menu()

    -- hydra.alert(tostring(win.size(win).w), 0.5)

    -- wndow is 1/2 make 2/3
    if win.size(win).w == newframe.w / 2 then
      newframe.w = newframe.w * 2/3
    -- window is 2/3 make 1/3
    elseif win.size(win).w == newframe.w * 2/3 then
      newframe.w = newframe.w / 3
    -- window is 1/3 reset to 1/2
    elseif win.size(win).w == newframe.w / 3 then
      newframe.w = newframe.w / 2
    -- window is new set to 1/2
    else
      newframe.w = newframe.w / 2
    end

    -- stick to the right edge
    if direction == "right" then
      newframe.x = win:screen():frame_without_dock_or_menu().w - newframe.w
    end

    win:setframe(newframe)
  end
end

hotkey.bind({"cmd", "alt"}, "right", movewindow("right"))
hotkey.bind({"cmd", "alt"}, "left", movewindow("left"))

-- fullscreen window with ext.win.margin
function fullscreen()
  local win = window.focusedwindow()
  local screen = win:screen():frame_without_dock_or_menu()
  win:setframe(screen)
end

hotkey.bind({"cmd", "alt"}, "up", fullscreen)

-- show available updates
local function showupdate()
  os.execute('open https://github.com/sdegutis/Hydra/releases')
end

-- what to do when an update is checked
function updates.available(available)
  if available then
    notify.show("Hydra update available", "", "Click here to see the changelog and maybe even install it", "showupdate")
  else
    hydra.alert("No update available.")
  end
end

-- check for updates every week
timer.new(timer.weeks(1), checkforupdates):start()
notify.register("showupdate", showupdate)

-- if this is your first time running Hydra, you're launching it more than a week later, check now
local lastcheckedupdates = settings.get('lastcheckedupdates')
if lastcheckedupdates == nil or lastcheckedupdates <= os.time() - timer.days(7) then
  checkforupdates()
end