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Read the full article: Legacy Modernization: Agents for Mainframe, ERP, and Niche Languages

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Legacy Modernization with AI Agents: Mainframe, ERP, and Niche Code

Modern enterprises often depend on decades-old software in languages like COBOL (mainframes), SAP ABAP, PL/SQL, or VB6. These aging systems are hard to change and costly to maintain. Fortunately, new AI coding agents and design patterns now make it possible to incrementally modernize legacy stacks. In this article, we explore how AI-driven tools help parse and rewrite old code, and describe proven patterns (interface facades, the “strangler” approach, automated testing) to replace legacy functionality gradually. We also cover data lineage, risk controls, rollback planning, and real-world ROI versus pitfalls. Even beginners can learn how to start: AI now “unlocks” coding by turning legacy code into understandable documentation or new code, so anyone can take the first step toward modernizing an old system.

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