linting tools, static analysis, CPD, etc. These are all old things you can continue to use and are much more robust than anything you can prompt. These should be standard when using LLMs. In fact, you can tighten the rules even more enforcing more restrictions so you ONLY get the output you want. put this behind a pre-commit hook and a CI job that runs on a PR, and it will work wonders.

You can have all the prompts you want on top of this, but if you don't have this automated stuff running behind the scenes, you aren't serious about these issues.

Looking through some of these comments here, I see lots of people rewriting concrete rules in markdown willing to spend tokens on the hope AI won't miss it where an actual program won't.