> Those acceptance criteria are guardrails for the change that comes after, and getting those out of your head into English is more important over the long haul than your undocumented short-term solution to the criteria.

I have a lot of context about the system/codebase inside my head. 99.9% of it is not relevant to the specific task I need to do this week. The 0.1% that is relevant to this task is not relevant to other tasks that I or my teammates will need to do next week.

You're suggesting that I write down this particular 0.1% in some markdown file so that LLM can write the code for me, instead of writing the code myself (which would have been faster). Chances are, nobody is going to touch that particular piece of code again for a long time. By the time they do, whatever I have written down is likely out of date, so the long term benefit of writing everything down disappears.

> after the countless little iterations you made since your head-spec wasn't as concrete as you imagined before you started iterating.

That's exactly the point. If I need to iterate on the spec anyway, why would I use an intermediary (LLM) instead of just writing the code myself?