GPT Engineer

GPT Engineer was one of the first tools to demonstrate AI generating a complete, runnable codebase from a single natural-language spec — describe what you want, answer a few clarifying questions, and it writes every file. Its open-source roots influenced a whole generation of AI coding tools that followed, and it continued on as the foundation that eventually became Lovable, while gptengineer.app still exists as a more raw, configuration-driven option for developers who don't want a fully managed experience.