The issues that slow your team down over time
Functions that are too long, nested too deep, or doing too many things at once
Unused variables, unreachable code, and deprecated functions cluttering your codebase
Magic numbers, cryptic variable names, and code that requires a PhD to understand
User inputs, API responses, and data boundaries that aren't properly checked
Objective measures that keep code maintainable
Number of independent paths through code
> 10 is a smellLevels of indentation in functions
> 3 is hard to followLines of code per function
> 30 needs splittingArguments per function
> 4 suggests object neededSee how Quality Guardian improves code maintainability
function processOrder(order) {
if (order) {
if (order.items) {
if (order.items.length > 0) {
if (order.customer) {
if (order.customer.active) {
// Finally, the actual logic...
return calculateTotal(order)
}
}
}
}
}
return null
}5 levels of nesting — hard to read and maintain
function processOrder(order) {
if (!isValidOrder(order)) return null
return calculateTotal(order)
}
function isValidOrder(order) {
return order?.items?.length > 0
&& order?.customer?.active
}Extract guard clause, flatten structure
function calculateDiscount(total) {
if (total > 100) return total * 0.1
if (total > 50) return total * 0.05
return 0
}Magic numbers: what do 100, 50, 0.1 mean?
const DISCOUNT_TIERS = {
PREMIUM: { threshold: 100, rate: 0.10 },
STANDARD: { threshold: 50, rate: 0.05 },
}
function calculateDiscount(total) {
const tier = Object.values(DISCOUNT_TIERS)
.find(t => total > t.threshold)
return tier ? total * tier.rate : 0
}Extract constants with meaningful names
function calc(d, t) {
const r = d / t
const x = r * 3.6
return x
}Cryptic names: d, t, r, x tell you nothing
const MS_TO_KMH = 3.6
function calculateSpeedKmh(distanceMeters, timeSeconds) {
const metersPerSecond = distanceMeters / timeSeconds
return metersPerSecond * MS_TO_KMH
}Descriptive names that explain purpose
Quality Guardian doesn't just lint your code — it understands the intent and suggests meaningful improvements that make your codebase easier to work with.
Evaluates function length, nesting, and organization
Provides specific code improvements, not just warnings
Understands your codebase patterns and conventions
Measure Complexity
Calculates cyclomatic complexity and nesting depth
Trace Usage
Identifies unused code and dead branches
Assess Clarity
Evaluates naming, structure, and readability
Suggest Refactoring
Provides specific improvements with examples
Technical debt compounds. Quality Guardian prevents it.
Clean code means new developers understand and contribute faster
Well-structured code is easier to change when requirements evolve
Simple, clear code has fewer places for bugs to hide
Every PR is a chance to improve or degrade quality.
Quality Guardian ensures you always move forward.
Let Quality Guardian catch complexity before it compounds. Free for 14 days, no credit card required.