Build a legacy-system modernization tool that analyzes an existing application and creates a safe, incremental path toward a modern architecture. Map business-critical functionality, tightly coupled modules, outdated dependencies, duplicated logic, database dependencies, and undocumented behavior. Generate a modernization roadmap with small migration steps, compatibility layers, automated tests, and rollback checkpoints. Allow teams to compare a gradual refactor against a full rewrite using estimated effort, operational risk, and feature disruption. Never recommend replacing working code solely because it uses older technology.
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