What problem does it solve? Migrating to or configuring Turbopack in Next.js raises practical questions: webpack loaders stop working, CSS ordering changes, config keys move, and build or HMR issues need systematic debugging. This Skill provides expert guidance for all of these scenarios. ## Core Features & Use Cases - Configuration Guidance: Set up top-level turbopack config in Next.js 16, including resolveAlias, resolveExtensions, and custom turbopack.rules for loaders like @svgr/webpack. - Webpack Migration: Map common webpack loaders (css-loader, sass-loader, file-loader, raw-loader) to Turbopack built-ins or equivalents, and know when to fall back to webpack. - Build & Performance Diagnostics: Profile HMR and builds with NEXT_TURBOPACK_TRACING, diagnose large bundles with the built-in analyzer, and fix environment boundary errors using the server-only package. - Use Case: Your Next.js build fails after switching to Turbopack because a custom webpack loader is unsupported. Use this Skill to identify the equivalent turbopack.rules configuration or determine when to opt back into webpack. ## Quick Start Ask the Turbopack skill how to migrate your webpack SVG loader configuration to Turbopack in your next.config file.