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Legacy Code Archaeology

Safely Refactor
Legacy Debt.

Don't let legacy systems slow you down. Learn the exact frameworks senior engineers use to modernize monoliths using AI without breaking production.

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legacy-refactor.sh

The Modernization Blueprint

🔍

Archaeology

Use AI to explain "un-googleable" internal patterns and map hidden dependencies across the codebase.

🛡️

Safety Nets

Generate characterization tests that lock in existing behavior before you touch a single line of implementation.

✂️

Strangling

Systematically replace old components with modern, typed implementations using the Strangler Fig pattern.

Chapter 10: Refactoring & Legacy Code

This isn't theoretical. In this module of the course, we take a messy, undocumented legacy module and modernize it live. You'll learn:

  • 01. Prompting for code explanation in large, complex files.
  • 02. Identifying refactoring "hinges" where AI can be most effective.
  • 03. Converting legacy JS to TypeScript with high-fidelity types.
  • 04. Maintaining side-effects while cleaning up core logic.
View Full Curriculum

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