Legacy code can feel like a system of hidden dependencies, undocumented assumptions, and risky surprises. AI for Software Developers: Legacy Code Understanding shows you how to use AI and ChatGPT as practical aids for making sense of unfamiliar software, documenting what you learn, and planning safer maintenance work.Maya Ellison presents a disciplined approach to legacy code analysis that keeps human judgment at the center. You'll learn how to build a reliable map of an unfamiliar system, ask AI focused questions without losing the broader context, and trace behavior across modules, services, data flows, and user workflows. The book also explains how to turn discoveries into useful technical documentation, assess change risk, and break maintenance tasks into smaller, safer steps.The introduction establishes a practical mindset for working with aging or poorly documented systems. Focused chapters guide you through code comprehension, documentation, dependency tracing, risk assessment, and incremental change planning. The conclusion brings these techniques together into a repeatable workflow you can apply on real maintenance projects.Whether you are inheriting a legacy application, joining an unfamiliar codebase, or preparing a difficult refactor, this book offers a clear method for using AI tools responsibly while improving software understanding and reducing avoidable risk.
