init.lua

function launchAppOnHotkey(modifiers, key, appName)
   hs.hotkey.bind(modifiers, key, function()
		     local app = hs.application.find(appName)
		     if app == nil then
			hs.application.launchOrFocus(appName)
		     elseif app:isFrontmost() then
			app:hide()
		     else
			local win = app:mainWindow()
			spaces.moveWindowToSpace(win:id(), spaces.activeSpaceOnScreen())
			win:focus()
		     end
   end)
end

launchAppOnHotkey({"alt"},"`","WezTerm")
launchAppOnHotkey({"alt","shift"},"o","Obsidian")