Cursor CEO Michael Truell warns against "vibe coding," an emerging trend where developers rely heavily on AI to generate software end-to-end without close review. Speaking at the Fortune Brainstorm AI conference, Truell cautioned that this over-reliance, while speeding up development, could lead to fundamental weaknesses in software systems. He suggested that as projects grow in complexity, these unexamined foundations may eventually cause systems to "crumble."