> the update snippet provided is referencing css thats not defined That isn't how HTML works. You mean the new HTML has classes which from what your LLM can s

> the update snippet provided is referencing css thats not defined That isn't how HTML works. You mean the new HTML has classes which from what your LLM can see has no styles applied. Maybe those styles are in a different file or maybe the developer didn't want any styles applied, the editing LLM would not know that. It is completely broken behavior and you lied about it at first. Your model should not be writing code! It should just be applying edits given to it.