Every developer has heard “Don’t Repeat Yourself” DRY 1. How much code reuse is too much? 2. Am I over-abstracting? 3. Should this be a helper? A util? A service? A hook? The truth: Bad DRY creates more problems than it solves. Good DRY makes ...

Every developer has opened a messy project and immediately wanted to cry. Maybe the routes folder had configs, the utils folder had business logic, and the components folder was full of files named test-final-new.js. But here’s the secret: folder st...