Shadcn Guideline: Setup — Configure path aliases. Description: Set up proper import aliases in tsconfig and components.json. Do: Use @/components/ui path aliases. Don't: Relative imports like ../../components. Good Example: import { Button } from "@/components/ui/button". Bad Example: import { Button } from "../../components/ui/button". Severity: Medium. Docs: https://ui.shadcn.com/docs/installation.