CUPID - for joyful code

The page argues that some software qualities make code a joy to work with, and that context still matters because every choice is a tradeoff. It presents five CUPID properties as a compact way to describe code that is easier to navigate, understand, and change with confidence.

Reading notes

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• The five CUPID properties are composable, Unix philosophy, predictable, idiomatic, and domain-based.
• Code that is easy to navigate and reason about gives developers confidence that changes will have the intended effect.
• The author links joyful code to human understandability, habitability, and the experience of working inside a codebase.
• The five properties are presented as foundational and mutually reinforcing, with other candidate qualities treated as derivable from them.
• The page says code can be improved by moving it toward the center of these properties, especially in legacy codebases.