It's speculative at this time so I can tell my point of view: you tell it in English. Sometimes it's going to ask for clarifications, other times it's going to

It's speculative at this time so I can tell my point of view: you tell it in English. Sometimes it's going to ask for clarifications, other times it's going to get it slightly wrong, or it will have to fill in the missing parts of the specs and take micro-decisions. Just like a human programmer would. I don't think it will write "perfect code" whatever that means. It will write code with its own idiosyncrasies its own writing style, etc.