Claude isn’t great at framework-level decisions by default. It tends to reach for React + Next.js every time—not because they’re always the best choice, but because they dominate its training data and the job market. In practice, stacks like Svelte + Vite are much faster. Next.js can feel sluggish and brittle locally, sometimes burning hours just to get a dev server running. Svelte with Vite, on the other hand, spins up in milliseconds. For these less popular but higher-performance stacks, I recommend pairing Claude with Claude Skills. Skills let you specialize Claude on your exact framework, codebase, or integrations. They close the training gap on niche tools—so you can run the optimal stack, not just the most common one.