Menu
Improve interface resilience through better error handling, i18n support, text overflow handling, and edge case management. Makes interfaces robust and production-ready.
Install with Codex or Claude Copy this prompt, paste it into Codex, Claude, or another assistant, and let it review the skill page and install it for you.
Review a feature and enhance it with purposeful animations, micro-interactions, and motion effects that improve usability and delight.
Add moments of joy, personality, and unexpected touches that make interfaces memorable and enjoyable to use. Elevates functional to delightful.
Create distinctive, production-grade frontend interfaces with high design quality. Use this skill when the user asks to build web components, pages, artifacts, posters, or applications. Generates creative, polished code that avoids generic AI aesthetics.
Design or improve onboarding flows, empty states, and first-time user experiences. Helps users get started successfully and understand value quickly.
Improve interface performance across loading speed, rendering, animations, images, and bundle size. Makes experiences faster and smoother.
Based on SOC occupation classification
| name | harden |
| description | Improve interface resilience through better error handling, i18n support, text overflow handling, and edge case management. Makes interfaces robust and production-ready. |
| user-invokable | true |
| args | [{"name":"target","description":"The feature or area to harden (optional)","required":false}] |
Strengthen interfaces against edge cases, errors, internationalization issues, and real-world usage scenarios that break idealized designs.
Identify weaknesses and edge cases:
Test with extreme inputs:
Test error scenarios:
Test internationalization:
CRITICAL: Designs that only work with perfect data aren't production-ready. Harden against reality.
Systematically improve resilience:
Long text handling:
/* Single line with ellipsis */
.truncate {
overflow: hidden;
text-overflow: ellipsis;
white-space: nowrap;
}
/* Multi-line with clamp */
.line-clamp {
display: -webkit-box;
-webkit-line-clamp: 3;
-webkit-box-orient: vertical;
overflow: hidden;
}
/* Allow wrapping */
.wrap {
word-wrap: break-word;
overflow-wrap: break-word;
hyphens: auto;
}
Flex/Grid overflow:
/* Prevent flex items from overflowing */
.flex-item {
min-width: 0; /* Allow shrinking below content size */
overflow: hidden;
}
/* Prevent grid items from overflowing */
.grid-item {
min-width: 0;
min-height: 0;
}
Responsive text sizing:
clamp() for fluid typographyText expansion:
// ❌ Bad: Assumes short English text
<button className="w-24">Submit</button>
// ✅ Good: Adapts to content
<button className="px-4 py-2">Submit</button>
RTL (Right-to-Left) support:
/* Use logical properties */
margin-inline-start: 1rem; /* Not margin-left */
padding-inline: 1rem; /* Not padding-left/right */
border-inline-end: 1px solid; /* Not border-right */
/* Or use dir attribute */
[dir="rtl"] .arrow {
transform: scaleX(-1);
}
Character set support:
Date/Time formatting:
// ✅ Use Intl API for proper formatting
new Intl.DateTimeFormat("en-US").format(date); // 1/15/2024
new Intl.DateTimeFormat("de-DE").format(date); // 15.1.2024
new Intl.NumberFormat("en-US", {
style: "currency",
currency: "USD",
}).format(1234.56); // $1,234.56
Pluralization:
// ❌ Bad: Assumes English pluralization
`${count} item${count !== 1 ? "s" : ""}`;
// ✅ Good: Use proper i18n library
t("items", { count }); // Handles complex plural rules
Network errors:
// Error states with recovery
{
error && (
<ErrorMessage>
<p>Failed to load data. {error.message}</p>
<button onClick={retry}>Try again</button>
</ErrorMessage>
);
}
Form validation errors:
API errors:
Graceful degradation:
Empty states:
Loading states:
Large datasets:
Concurrent operations:
Permission states:
Browser compatibility:
Client-side validation:
Server-side validation (always):
Constraint handling:
<!-- Set clear constraints -->
<input
type="text"
maxlength="100"
pattern="[A-Za-z0-9]+"
required
aria-describedby="username-hint"
/>
<small id="username-hint">
Letters and numbers only, up to 100 characters
</small>
Keyboard navigation:
Screen reader support:
Motion sensitivity:
@media (prefers-reduced-motion: reduce) {
* {
animation-duration: 0.01ms !important;
animation-iteration-count: 1 !important;
transition-duration: 0.01ms !important;
}
}
High contrast mode:
Slow connections:
Memory leaks:
Throttling & Debouncing:
// Debounce search input
const debouncedSearch = debounce(handleSearch, 300);
// Throttle scroll handler
const throttledScroll = throttle(handleScroll, 100);
Manual testing:
Automated testing:
IMPORTANT: Hardening is about expecting the unexpected. Real users will do things you never imagined.
NEVER:
Test thoroughly with edge cases:
Remember: You're hardening for production reality, not demo perfection. Expect users to input weird data, lose connection mid-flow, and use your product in unexpected ways. Build resilience into every component.