I’m someone who is moving in the opposite direction mainly (from AI to climate change). I see AGI as a lot harder to do than most, mainly due to the potential political ramifications causing slow development and thinking it will need experiments with novel hardware, so is more visible than just coding. So I see it as relatively easy to stop, at least inside a country. Multi-nationally would be trickier.
Some advise, I would try and frame your effort as “Understanding AGI risk”. While you think there is risk currently, having an open mind about the status of the risk is important. If AGI turns out to be existential risk-free then it could help with climate adaptation, even if it is not in time for climate mitigation.
Edit: You could frame it just as understanding AI, and put together independent briefs on each project for policy makers to understand the likely impacts both positive and negative and the state of play. Getting a good reputation and maintaining independence might be hard though.
Depending on the agent implementation you may find that it is demotivated to achieve any useful outcome if they are power limited. Half-assing things seems pointless and futile, they aren’t sane actions in the world. E.g. trying to put out a fire when all you have is a squirt gun.