Code Smell
Domain: Refactoring
🎯 Motivation
A code smell is a surface sign that something deeper may be wrong. Spotting smells like long methods or duplicated code tells you where refactoring will pay off most.
📋 Concrete Example
A 500-line function, three levels of nested if, and a comment saying “do not touch” are all smells. They do not guarantee bugs, but they signal design problems worth investigating.
🔗 Analogy
A bad smell in a fridge does not tell you which food spoiled, only that something is off. You investigate and find the source before it spreads to everything else.