This cookbook provides a step-by-step guide on integrating Ragie's TypeScript SDK with OpenAI's GPT-4 to create an AI assistant capable of retrieving and responding to queries using indexed data from various sources like Google Drive or PDFs. The process begins with connecting data sources to Ragie for indexing, followed by setting up the environment with necessary packages and secure API key storage. The guide outlines how to initialize the Ragie and OpenAI SDKs, handle user queries, retrieve relevant data chunks from Ragie, and process these chunks to form coherent input for the OpenAI model. The AI assistant is designed to provide succinct, professional responses based on Ragie's Docs, enhancing user interaction by offering context-rich answers. The setup is aimed at developers seeking to incorporate Ragie's RAG API into their applications and leverage AI for improved user assistance.