Atsushi Nakatsugawa's article delves into the intricacies of AI development tool stacks and their application in engineering teams to enhance productivity and address common challenges. The piece explores how developers leverage various AI tools across different stack layers to accelerate the development process, with a focus on AI coding assistants, code review tools, testing, refactoring, and documentation aids. These tools provide unique solutions to real-world problems, from improving AI assistant prompts with codebase context tools to employing agent-like AI code review tools. The article emphasizes the strategic integration of AI into all stages of the software development lifecycle, such as coding, review, testing, and documentation, to significantly enhance code quality and reduce frustration. It highlights the importance of understanding the specific benefits and potential issues of each tool type, encouraging teams to adopt a tailored approach to building their AI tool stacks.