GPTDuck is an AI tool designed to assist users in finding answers to their questions about a specific Github repository. By inputting a Github repository, the tool will download it to the server and create embeddings based on the code. It should be noted that only public repositories with less than 200 files and less than 100MB can be processed, although these limits can be increased through an upgrade in the tool"s settings. Once the repository is indexed, users can ask questions about it, making sure to be clear and concise in their query. If the repository has been indexed before, the tool will take approximately 15 seconds to provide an answer. However, if the repository has not been indexed previously, it may take longer, depending on the size of the repository. Overall, GPTDuck offers a unique and efficient way to search for information within Github repositories, making it valuable for developers and researchers who need to quickly access and understand code.