Merge by new agent

I'm wondering if you think it might be a good idea to add an `uzi merge` command? Let's say you have 5 instances of claude and codex come up with a solution to your problem. Once all 5 agents believe the work is done, you could run `uzi merge` to spin up on last agent that analyzes the work done by the previous 5. It then picks the best ideas from each to implement a final branch.