I feel like the better approach would be to throw away PRs when they're bad, edit your prompt, and then let the agent try again using the new prompt. Throwing lots of wasted compute at a problem seems like a luxury take on coding agents, as these agents can be really expensive.

So the process becomes: Read PR -> Find fundamental issues -> Update prompt to guide agent better -> Re-run agent.

Then your job becomes proof-reading and editing specification documents for changes, reviewing the result of the agent trying to implement that spec, and then iterating on it until it is good enough. This comes from the belief that better, more expensive, agents will usually produce better code than 5 cheaper agents running in parallel with some LLM judge to choose between or combine their outputs.