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    UI State Coverage Analyzer

    1

    Audit frontend components for missing loading, error, empty, and edge-case UI states.

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    UI State Coverage Analyzer

    UI State Coverage Analyzer

    Example session with this skill installed

    Audit this React search results component for state coverage. It currently shows a list of items or a 'not found' message. [Component code attached]

    • Read your context and instructions
    • Compiled the ui state coverage
    • Generated the UI component

    I have analyzed the SearchResults component. While the happy path and basic empty state are handled, there are critical gaps in loading feedback, error recovery, and partial data rendering.

    UI State Coverage Audit

    1. Executive Summary

    The component has 60% state coverage. The primary risk is a "flash of empty content" during API fetches because the loading state is not visually distinct from the "no results" state.

    2. State Coverage Matrix

    ComponentIdleLoadingSkeletonEmptyNo ResultsErrorPartial
    SearchInputPresentN/AN/APresentN/AN/AN/A
    ResultsListPresentMissingMissingWeakPresentMissingMissing
    PaginationPresentDisabledN/AHiddenHiddenHiddenN/A

    3. Critical Gaps

    • Gap: Missing Loading/Skeleton State.
      • Impact: High. Users see a blank screen for 1-3 seconds, leading to perceived latency or brokenness.
      • Fix: Implement a skeleton row that matches the ResultCard layout.
    • Gap: No Error Recovery.
      • Impact: Medium. If the API fails, the component currently renders nothing.
      • Fix: Add an ErrorBoundary or local error state with a "Retry Search" button.

    4. Recommended State Definitions

    // Suggested state additions for SearchResults.tsx
if (isLoading) return <SearchSkeleton />;
if (error) return <ErrorMessage message={error.message} onRetry={fetchData} />;
if (results.length === 0) return <EmptyResults query={query} />;

    Next steps

    • Add a loading boolean to the component's state hook.
    • Create a ResultCardSkeleton component to prevent layout shift.
    • Update the ARIA live region to announce when search results are being updated.

    ui-state-coverage-analyzer.tsx

    TSX · React component

    Generated

    Example file from a real run - the skill writes it into your workspace.

    Connects securely to your tools. The creator never sees your data.

    What you get

    Identify missing skeleton loaders and empty states in frontend code.Audit error handling for user-friendly recovery paths and retries.Generate a state coverage matrix for design system components.Review accessibility and ARIA status for dynamic UI transitions.

    About this skill

    The problem

    Developers often focus on the "happy path," leaving edge case UI states as an afterthought. This leads to broken layouts, confusing empty screens, and frustrating error messages that offer no recovery path for the user.

    What it does

    • Identifies missing UI states like skeleton loaders, partial data failures, and no-results views.
    • Generates a comprehensive State Coverage Matrix for every component in your view.
    • Audits error handling for specific recovery actions and data preservation.
    • Evaluates accessibility markers like aria-busy and focus management during state transitions.
    • Prioritizes fixes based on user impact, task criticality, and implementation effort.

    Frameworks & tools

    Works with React, Vue, Svelte, Tailwind CSS, Figma screenshots, and raw HTML/CSS. Analyzes logic in TypeScript/JavaScript frontend code.

    Why this beats prompting it yourself

    General-purpose LLMs usually give surface-level design feedback. This skill follows a rigorous multi-step inventory process to ensure you do not miss obscure states like "permission denied" or "optimistic pending" that are often skipped in a standard prompt.

    Use cases

    • Auditing a new dashboard feature before it hits production.
    • Mapping out state requirements for a design system component.
    • Debugging "blank screen" issues by identifying missing loading or error boundaries.
    • Reviewing accessibility and responsive behavior for interactive elements.

    Known limitations

    Cannot verify actual network latency or server-side timing. Accuracy on accessibility depends on the level of code or metadata provided.

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