The text discusses the use of Large Language Model (LLM) agents in automating code migration and refactoring tasks. LLM agents are autonomous systems that use large language models to perform goal-driven tasks, such as planning actions, reasoning through steps, and making decisions across complex workflows. These agents can be used to orchestrate multi-step tasks like code refactoring, documentation updates, or test generation. The authors present a real-world case study of using LLM agents for a Java-to-TypeScript migration project, which involved three specialized agents performing distinct roles in the workflow: file reader agent, planner agent, and migrator agent. The agents were able to scan the codebase, propose updates, and carry out repetitive edits with contextual awareness, reducing the workload and catching edge cases. The authors highlight the benefits of using LLM agents for code migration, including multi-file understanding, consistent refactoring patterns, built-in memory and reasoning, scalable automation, and reduced cognitive overhead for developers. They also discuss tools and frameworks used in the case study, such as LangChain, GPT-4, and Vector Database.