In software development, dealing with legacy code often feels like navigating a minefield, where any change risks triggering unforeseen bugs. Michael Feathers' work offers a disciplined approach to understanding, improving, and safely modifying legacy systems. His insights help developers transform fragile codebases into manageable, adaptable assets, enabling continuous delivery and evolution without the dread of destabilizing critical functionality.

• Legacy code is defined as code without tests, making it difficult to change confidently.
• Introducing tests to legacy code is the foundation for safe refactoring and enhancement.
• Techniques like characterization tests help capture the existing behavior before modifications.
• Breaking...
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