Revamp Legacy Monoliths in Minutes with GPT‑4o – A Step‑by‑Step Guide

Revamp Legacy Monoliths in Minutes with GPT‑4o – A Step‑by‑Step Guide I’m Myroslav Mokhammad Abdeljawwad , a senior Java architect who’s spent the last decade wrestling with monolithic codebases that grew out of necessity but now choke on change. What if you could rewrite those sprawling Spring Boot applications into clean, modular services in less than an hour? With GPT‑4o, that’s no longer a pipe dream—it’s a reality. 1️⃣ Set the Stage: Why Legacy Monoliths Need AI‑Powered Refactoring Legacy monoliths often hide technical debt behind layers of hard‑coded logic, tight coupling, and brittle tests. Traditional refactorings require deep manual analysis, risk breaking business rules, and demand huge developer hours. GPT‑4o flips the script by reading your code, understanding its intent, and generating modular, testable snippets that preserve the original behavior. Before diving in, ensure you have: A recent JDK (≥ 21) and Spring Boot 3.4+ installed. An OpenAI API key with GPT‑4o access. A