Yeah, I wouldn't do this for code that I was expecting anyone else to review.

This is actually the first time I've told an agent to write out a "problems.md" document - it was an experiment to see if stating the problem provided decent results, as opposed to working directly on a spec.

It did seem to work well though. I was outsourcing as much judgement as possible to the model, and the model did a good job at making decisions that got me to my required end result.

In this case, the AI could do the reasoning for me. Opus 5.5 and Fable 5.2 are really good!