[convexfunction]

If you know little about prompt engineering and want to throw together a demo of something that kind of works extremely quickly, or experiment with an LLM agent exactly as it's defined in some paper, LangChain is pretty useful.

If you want to develop a real LLM application, you're probably better off skipping the library completely, or at least fully understand each abstraction to make sure it does everything you want before you decide you want to incorporate it.