react-best-practices · 스킬 지원 에이전트
React·Next.js의 데이터 로딩, 렌더링과 코드 구조를 점검합니다.
React와 Next.js의 성능 문제를 데이터 로딩과 렌더링 구조에서 찾아보는 스킬입니다. 성능을 위해 무조건 복잡한 코드를 추가하기보다 현재 동작의 근거를 확인합니다.
관련 컴포넌트와 느려지는 조건을 전달해보세요. 화면 갱신과 데이터 요청의 관계를 살펴보고 개선할 부분과 예상되는 영향을 정리할 수 있습니다.
“이 Next.js 목록 화면이 느려. 데이터 로딩과 렌더링 구조를 검토하고 우선 바꿀 부분과 확인 방법을 알려줘.”
받을 수 있는 결과근거가 있는 개선안
Agent Skills를 지원하는 에이전트에 스킬을 추가하세요. 배포 작업은 Vercel 계정과 프로젝트 접근 권한이 필요합니다.
Node.js가 설치된 터미널에서 실행하고 대상 에이전트를 선택하세요. 스킬 폴더와 보조 파일을 함께 설치합니다. 설치 후 새 세션에서 작업을 요청하세요.
npx skills add https://github.com/vercel-labs/agent-skills/tree/063bee94c3f4df8453406c830b0a7df0f2860278/skills/react-best-practices
“react-best-practices 스킬을 사용해줘. 입력 자료: 관련 컴포넌트와 성능 문제”처럼 요청하세요. 위의 예시를 내 자료에 맞게 바꿔도 좋아요.
예상 결과는 ‘근거가 있는 개선안’입니다. 필요한 내용이 포함됐는지 확인하세요. 입력 자료의 사실·숫자와 결과를 대조하고, 부족한 부분을 이어서 요청하세요.
제작자 원본 2026-10-04 확인 · 설치 안내 2026-10-04 확인 · 실제 설치·실행 미검증
모델 사용 요금과 연결 앱 요금은 이용 중인 서비스의 정책을 따릅니다.
설치 안내 출처--- name: vercel-react-best-practices description: React and Next.js performance optimization guidelines from Vercel Engineering. This skill should be used when writing, reviewing, or refactoring React/Next.js code to ensure optimal performance patterns. Triggers on tasks involving React components, Next.js pages, data fetching, bundle optimization, or performance improvements. license: MIT metadata: author: vercel version: "1.0.0" --- # Vercel React Best Practices Comprehensive performance optimization guide for React and Next.js applications, maintained by Vercel. Contains 70 rules across 8 categories, prioritized by impact to guide automated refactoring and code generation. ## When to Apply Reference these guidelines when: - Writing new React components or Next.js pages - Implementing data fetching (client or server-side) - Reviewing code for performance issues - Refactoring existing React/Next.js code - Optimizing bundle size or load times ## Rule Categories by Priority | Priority | Category | Impact | Prefix |--- name: vercel-react-best-practices description: React and Next.js performance optimization guidelines from Vercel Engineering. This skill should be used when writing, reviewing, or refactoring React/Next.js code to ensure optimal performance patterns. Triggers on tasks involving React components, Next.js pages, data fetching, bundle optimization, or performance improvements. license: MIT metadata: author: vercel version: "1.0.0" --- # Vercel React Best Practices Comprehensive performance optimization guide for React and Next.js applications, maintained by Vercel. Contains 70 rules across 8 categories, prioritized by impact to guide automated refactoring and code generation. ## When to Apply Reference these guidelines when: - Writing new React components or Next.js pages - Implementing data fetching (client or server-side) - Reviewing code for performance issues - Refactoring existing React/Next.js code - Optimizing bundle size or load times ## Rule Categories by Priority | Priority | Category | Impact | Prefix | |----------|----------|--------|--------| | 1 | Eliminating Waterfalls | CRITICAL | `async-` | | 2 | Bundle Size Optimization | CRITICAL | `bundle-` | | 3 | Server-Side Performance | HIGH | `server-` | | 4 | Client-Side Data Fetching | MEDIUM-HIGH | `client-` | | 5 | Re-render Optimization | MEDIUM | `rerender-` | | 6 | Rendering Performance | MEDIUM | `rendering-` | | 7 | JavaScript Performance | LOW-MEDIUM | `js-` | | 8 | Advanced Patterns | LOW | `advanced-` | ## Quick Reference ### 1. Eliminating Waterfalls (CRITICAL) - `async-cheap-condition-before-await` - Check cheap sync conditions before awaiting flags or remote values - `async-defer-await` - Move await into branches where actually used - `async-parallel` - Use Promise.all() for independent operations - `async-dependencies` - Use better-all for partial dependencies - `async-api-routes` - Start promises early, await late in API routes - `async-suspense-boundaries` - Use Suspense to stream content ### 2. Bundle Size Optimization (CRITICAL) - `bundle-barrel-imports` - Import directly, avoid barrel files - `bundle-analyzable-paths` - Prefer statically analyzable import and file-system paths to avoid broad bundles and traces - `bundle-dynamic-imports` - Use next/dynamic for heavy components - `bundle-defer-third-party` - Load analytics/logging after hydration - `bundle-conditional` - Load modules only when feature is activated - `bundle-preload` - Preload on hover/focus for perceived speed ### 3. Server-Side Performance (HIGH) - `server-auth-actions` - Authenticate server actions like API routes - `server-cache-react` - Use React.cache() for per-request deduplication - `server-cache-lru` - Use LRU cache for cross-request caching - `server-dedup-props` - Avoid duplicate serialization in RSC props - `server-hoist-static-io` - Hoist static I/O (fonts, logos) to module level - `server-no-shared-module-state` - Avoid module-level mutable request state in RSC/SSR - `server-serialization` - Minimize data passed to client components - `server-parallel-fetching` - Restructure components to parallelize fetches - `server-parallel-nested-fetching` - Chain nested fetches per item in Promise.all - `server-after-nonblocking` - Use after() for non-blocking operations ### 4. Client-Side Data Fetching (MEDIUM-HIGH) - `client-swr-dedup` - Use SWR for automatic request deduplication - `client-event-listeners` - Deduplicate global event listeners - `client-passive-event-listeners` - Use passive listeners for scroll - `client-localstorage-schema` - Version and minimize localStorage data ### 5. Re-render Optimization (MEDIUM) - `rerender-defer-reads` - Don't subscribe to state only used in callbacks - `rerender-memo` - Extract expensive work into memoized components - `rerender-memo-with-default-value` - Hoist default non-primitive props - `rerender-dependencies` - Use primitive dependencies in effects - `rerender-derived-state` - Subscribe to derived booleans, not raw values - `rerender-derived-state-no-effect` - Derive state during render, not effects - `rerender-functional-setstate` - Use functional setState for stable callbacks - `rerender-lazy-state-init` - Pass function to useState for expensive values - `rerender-simple-expression-in-memo` - Avoid memo for simple primitives - `rerender-split-combined-hooks` - Split hooks with independent dependencies - `rerender-move-effect-to-event` - Put interaction logic in event handlers - `rerender-transitions` - Use startTransition for non-urgent updates - `rerender-use-deferred-value` - Defer expensive renders to keep input responsive - `rerender-use-ref-transient-values` - Use refs for transient frequent values - `rerender-no-inline-components` - Don't define components inside components ### 6. Rendering Performance (MEDIUM) - `rendering-animate-svg-wrapper` - Animate div wrapper, not SVG element - `rendering-content-visibility` - Use content-visibility for long lists - `rendering-hoist-jsx` - Extract static JSX outside components - `rendering-svg-precision` - Reduce SVG coordinate precision - `rendering-hydration-no-flicker` - Use inline script for client-only data - `rendering-hydration-suppress-warning` - Suppress expected mismatches - `rendering-activity` - Use Activity component for show/hide - `rendering-conditional-render` - Use ternary, not && for conditionals - `rendering-usetransition-loading` - Prefer useTransition for loading state - `rendering-resource-hints` - Use React DOM resource hints for preloading - `rendering-script-defer-async` - Use defer or async on script tags ### 7. JavaScript Performance (LOW-MEDIUM) - `js-batch-dom-css` - Group CSS changes via classes or cssText - `js-index-maps` - Build Map for repeated lookups - `js-cache-property-access` - Cache object properties in loops - `js-cache-function-results` - Cache function results in module-level Map - `js-cache-storage` - Cache localStorage/sessionStorage reads - `js-combine-iterations` - Combine multiple filter/map into one loop - `js-length-check-first` - Check array length before expensive comparison - `js-early-exit` - Return early from functions - `js-hoist-regexp` - Hoist RegExp creation outside loops - `js-min-max-loop` - Use loop for min/max instead of sort - `js-set-map-lookups` - Use Set/Map for O(1) lookups - `js-tosorted-immutable` - Use toSorted() for immutability - `js-flatmap-filter` - Use flatMap to map and filter in one pass - `js-request-idle-callback` - Defer non-critical work to browser idle time ### 8. Advanced Patterns (LOW) - `advanced-effect-event-deps` - Don't put `useEffectEvent` results in effect deps - `advanced-event-handler-refs` - Store event handlers in refs - `advanced-init-once` - Initialize app once per app load - `advanced-use-latest` - useLatest for stable callback refs ## How to Use Read individual rule files for detailed explanations and code examples: ``` rules/async-parallel.md rules/bundle-barrel-imports.md ``` Each rule file contains: - Brief explanation of why it matters - Incorrect code example with explanation - Correct code example with explanation - Additional context and references ## Full Compiled Document For the complete guide with all rules expanded: `AGENTS.md`
Original skill: vercel-labs/agent-skills/skills/react-best-practices/SKILL.md Source: https://github.com/vercel-labs/agent-skills/blob/063bee94c3f4df8453406c830b0a7df0f2860278/skills/react-best-practices/SKILL.md License: MIT MIT License Attribution: vercel-labs/agent-skills (MIT license declared in the repository README) Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
SKILL.md 본문입니다. 원문에서 참조하는 스크립트·보조 파일은 원본 패키지에 포함되어 있습니다.