AI-powered development tools are transforming application modernization by replacing risky, expensive “big bang” rewrites with continuous, incremental modernization strategies. Traditionally, organizations struggled with legacy systems due to manual refactoring, knowledge gaps, technical debt, and operational risk. The paper explains how AI platforms like GitHub Copilot now automate code transformation, documentation, logic discovery, validation, and dependency mapping, enabling developers to modernize applications safely and continuously within existing CI/CD workflows. AI agents also assist with testing, governance, and architecture alignment while reducing operational costs and accelerating delivery. Rather than treating modernization as a massive standalone project, organizations can now embed modernization into daily development processes, improving agility, reducing risk, lowering costs, and enabling ongoing system evolution without disrupting production environments.

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