One of the things that folks talk a lot about with modern AI systems are hallucinations: instances where an LLM “makes up“ a response to a prompt when “made up“ is not desired. (For some prompts, e.g., “write me a nursery rhyme about walruses eating cake“, made up is exactly what you want!) My colleagues Steve Lucco and Anders Hejlsberg have just recently open sourced a system called TypeChat, that I think is one of the most powerful tools in the AI development arsenal for getting rid of undesired hallucinations. If you're building an AI application, you should check it out!