What problem does it solve? Frontend developers working with Vite often struggle with scattered configuration knowledge across config files, plugin APIs, SSR setup, and the breaking changes introduced by Vite 8's Rolldown bundler. This Skill consolidates authoritative Vite guidance into one place so you get correct, version-aware answers immediately. ## Core Features & Use Cases - Configuration Guidance: Covers vite.config.ts, defineConfig, conditional configs, loadEnv, aliases, proxies, and build targets. - Plugin Authoring: Explains Vite-specific hooks like configResolved, configureServer, transformIndexHtml, virtual modules, and plugin ordering. - Build, SSR & Migration: Documents library mode, multi-page apps, the JavaScript API, the Vite 6+ Environment API, and the Vite 8 Rolldown/Oxc migration path. - Use Case: You are upgrading a project from Vite 7 to Vite 8 and need to convert rollupOptions to rolldownOptions and esbuild settings to oxc — this Skill provides the exact before/after config patterns. ## Quick Start Ask the assistant to help you write or migrate a vite.config.ts for your project, for example to set up path aliases, a dev proxy, or upgrade to Vite 8 Rolldown options.