Comment by pragma_x

You are correct. You absolutely must fill the token space with unanbiguous requirements, or Claude will just get "creative". You don't want the AI to do creative things in the same way you don't want an intern to do the same.

That said, I have found that I can get a lot of economy from speaking in terms of jargon, computer science formalisms, well-documented patterns, and providing code snippets to guide the LLM. It's trained on all of that, and it greatly streamlines code generation and refactoring.

Amusingly, all of this turns the task of coding into (mostly) writing a robust requirements doc. And really, don't we all deserve one of those?