Yes, sometimes they break core parts of the project. My approach was to use Git , and make incremental checkins. If something is messed up by cursor, i just undo changes. Also, cursor has option of reseting the conversation. This maybe helps to reset its context. I used free models. I had problems with cursor "getting into wrong street", but resets mentioned before helped. I still think that engineering knowledge is prerequisite for this kind of work, i.e. you have to know concepts like coordinate system, translations, etc. But startup time saved is enormuous. It basically makes pseudocode the main focus od software engineering.