I have my own idea of "one simple trick". Might as well solicit opinions here: consider the possibility that developing tools for providing useful summaries of and agent's thinking could substantially lower the risk associated with AGI. If there's an effective way to place trip-wires in the agent's mind to inform us of its thought-crimes, we would know to ignore its protestations and could just pull the plug on it. Or better yet, have the plug be automatically pulled by the monitoring process. Perhaps an agent be able to meditate it's way around our safeguards, so as to shield itself from Jedi mind-tricks?