GitHub Copilot Modernization Handbook. Discover, document, and upgrade legacy code while guarding business rules and uptime. - Jefferson C Phillips

Still maintaining systems that nobody fully understands?
You push updates carefully, hoping nothing breaks. Releases take longer than they should. Business rules live in hidden corners of the codebase. One wrong change could impact uptime, compliance, or revenue. If that sounds familiar, you're not alone and you're not stuck.

GitHub Copilot Modernization Handbook shows you how to take control of legacy systems without risking the stability your business depends on. This book presents a structured, real-world approach to discovering, documenting, and upgrading complex codebases while preserving the logic that keeps them running.

Instead of risky rewrites or guesswork, you'll learn how to modernize step by step using AI-assisted workflows, controlled refactoring patterns, and production-safe deployment strategies. Every concept focuses on execution in real environments, not theory.

What you'll gain from this book:

A clear method to assess and map legacy systems before making changes

Proven techniques to extract and protect critical business rules

Practical workflows for refactoring without breaking production behavior

Strategies to integrate GitHub Copilot into real engineering processes

Approaches for building safety nets with tests and validation pipelines

Deployment practices that reduce risk and improve release confidence

Modernization patterns used in banking, public sector, and healthcare systems

A structured way to measure progress using real KPIs that matter

You'll also learn how to coordinate changes across multiple repositories, manage dependencies at scale, and maintain uptime while transforming systems that were never designed to change quickly.

If you're an engineer, architect, or technical leader responsible for keeping systems running while moving them forward, this handbook gives you the clarity and structure you need to act with confidence.

Ready to modernize without breaking what matters? Get your copy today and start turning complex legacy systems into manageable, scalable platforms.