One line to kill every spinner in Claude's UIs

When Claude Code builds a page that fetches data, add this line to your prompt: "Every loading state must be a skeleton pulse matching the final layout dimensions exactly — no spinners." Claude stops shipping blank screens and spinners and starts building real skeleton loaders. Perceived load time drops roughly 40-50%. Works across React, Next, Vue, Svelte. Free, takes 10 seconds to add.