ARCHITECTURE |
AUG 30, 2024 |
By Spareek |
8 MIN READ
Clean Code is a Design System
We often think of design systems as visual components: buttons, modals, color tokens. But design systems are really just constraints applied to creativity to ensure consistency. Your codebase should be treated exactly the same way.
When software architectures lack constraints, the entropy of the codebase increases with every commit. Developers create custom hook variations for similar API calls, introduce multiple patterns for managing forms, and bundle styling tokens ad-hoc. Over time, the cognitive load required to understand a single folder slows down execution speed to a crawl.
The Tyranny of Flexibility
Engineers love flexibility. We write highly abstracted code that can do anything. But in a team of 50, flexibility is a liability. Clean code requires establishing strict constraints: predictable naming conventions, standardized data fetching patterns, and uniform error boundaries.
Think of logic components like primitive UI components. A design system doesn't let you invent a new shade of blue for every button; it restricts you to a semantic color palette. Similarly, your code design system should restrict how modules communicate and handle errors.
DRY vs. WET Code (Write Everything Twice)
Many developers apply the DRY (Don't Repeat Yourself) rule prematurely. Duplication is far cheaper than the wrong abstraction. A code design system defines guidelines on when to extract code:
- Duplication: Allow copying code once. If you need it a third time, extract it into a structured utility.
- Isolation: Keep module logic self-contained. Shared utilities should be pure functions with zero side effects.
- Composition: Build complex behaviors by composing small, single-responsibility hooks rather than adding configurations to a massive helper file.
composable-hook-refactor.ts
// AVOID: A single hook that handles fetch, validation, logging, and storage
function useComplexUser(id: string)
// 100 lines of coupled logic
// PREFER: Small composable hooks representing the design system blocks
function useUser(id: string) {
const data = useQuery(['user', id], fetchUser);
return data;
}
function useUserPermissions(role: string)
return useMemo(() => computePermissions(role), [role]);
Architecting the Architecture
When you view your logic through the lens of a "Design System," you stop writing custom hook variations for every module, and you begin relying on composed, primitive utilities. This is how the best engineering organizations scale their output without drowning in technical debt.
By treating clean code as a set of component logic primitives, developers spend less time making low-level design decisions and more time focusing on high-level business goals. Set up lint rules, define architectural boundaries, and enforce them automatically at commit time.