Pulumi's blog post explores the development and refinement of their AI-powered code generation for Infrastructure as Code (IaC), focusing on the Pulumi Copilot and its successor, Pulumi Neo. The post draws an analogy between Anthony Bourdain's culinary research and modern AI code generation, emphasizing the need for AI to blend basic knowledge with updated, domain-specific insights. Pulumi employs a technique called Retrieval Augmented Generation (RAG) to enhance code accuracy by integrating external data, ensuring code reflects the latest provider capabilities. The post discusses the importance of recall and precision in information retrieval, emphasizing prompt coverage as a practical metric for evaluating code quality. Pulumi's approach includes semantic search using vector embeddings and hybrid search strategies to accurately retrieve relevant documents. To refine code generation, Pulumi utilizes a two-phase document selection strategy, self-debugging for error correction, and various testing and monitoring methods. The post highlights the importance of balancing AI capabilities with contextual knowledge and encourages user feedback to enhance AI-assisted infrastructure development.