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Improve interface resilience through better error handling, i18n support, text overflow handling, and edge case management. Makes interfaces robust and production-ready.
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SOC 職業分類に基づく
Generate ASCII block-art banner images for social posts and OG images. Dark midnight aesthetic with faded {company} text on near-black background. Two sizes — 1080x1080 (social) and 1200x630 (OG). Use for product announcements, project launches, concept visuals, and repo OG images.
Explore approaches and tradeoffs before committing to a PRD. Research HQ context, compare options, surface unknowns, generate brainstorm.md with recommendation.
Post-ship documentation sync — updates README, CLAUDE.md, architecture docs, and INDEX files to match what actually shipped. Use after merging a PR, completing a project, or deploying a release. Triggers on "update docs", "sync documentation", "docs are stale", "document what shipped".
Execute a single PRD story through coordinated worker phases (Ralph pattern). Each worker handles its domain, passes context to the next, with back-pressure (tests/lint/typecheck) keeping code on rails.
Prepare for a new session to continue this work. Captures session learnings, syncs domain knowledge and insights, commits dirty repos, writes a thread file and handoff.json, updates INDEX files, and refreshes the search index. Ensures continuity across sessions.
Capture and classify learnings, route to structured policy files (rules) or insight files (educational knowledge). Deduplicates via qmd (Grep fallback), rebuilds policy digest after policy changes. Callable manually or from /execute-task, /run-project, /handoff, /checkpoint. Use --hard flag for hard-enforcement rules.
| 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.