This is for when your dashboard feels sluggish or your integration tests keep timing out. It teaches Linear and Vercel-style performance patterns: skeleton-first loading, aggressive React Query caching (5min stale, 30min cache), and code splitting strategies. The real value is in the testing guidance. It walks through the async testing footguns that cause timeouts (using getBy instead of findBy, missing mocks, wrong query selectors) and gives you a diagnostic protocol starting with screen.debug(). The performance budget is concrete: skeleton in 16ms, first data under 100ms, full interactive under 200ms. Good for teams building data-heavy React dashboards who need both speed and reliable tests.
npx skills add https://github.com/erichowens/some_claude_skills --skill reactive-dashboard-performance