Use hooks to run a bunch of review steps after -all- code writing steps your agent does and give it the exact review criteria you just described (via git hooks, or your agent harness of choice's own hooks eg https://code.claude.com/docs/en/hooks or AGENTS.md). So after every step where the agent writes the shitty untyped string map ball of mud, your orchestrator/main thread agent that spawned the code-writing-subagent spawns a follow-up review agent automatically that is given that output, your prompt that explains what well written Go code looks like, and even the sample/golden-path code of your choice to use as a style guide.

Each time you encounter a shitty thing you hate, add a new 'review type' / 'thing to watch out for' and just ask your agent to add it to your hooks for you. This works well with Claude at least.

I have about a dozen or so hooks that run on every integration branch my agents write that review for all sorts of things from correctness to spec, performance improvement opportunities, modularity, analysis of any dependencies added, 'definition of done', UI/UX, etc.

I recently told Claude it should run the whole suite of reviews twice. I will probably go on and proceed to having it run like 5 times eventually idfk.

But the more you start asking your agents to modify their own behavior, using the native solutions offered by Cursor, or Claude, or Codex, the sooner you'll start to feel better about the results.