Vercel React Best Practices
sanity-io/sanity
React and Next.js performance optimization guidelines from Vercel Engineering.
IMPORTANT: Any change to React or Next.js code must read through this skill first.
Install React Best Practices
$ npx skills add benchflow-ai/skillsbench --skill react-best-practices -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install benchflow-ai/skillsbench react-best-practices --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/benchflow-ai/skillsbench.git skills-src && mkdir -p .claude/skills && cp -r skills-src/tasks/fix-visual-stability/environment/skills/react-best-practices .claude/skills/react-best-practices && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "react-best-practices" agent skill from https://github.com/benchflow-ai/skillsbench/tree/main/tasks/fix-visual-stability/environment/skills/react-best-practices into .claude/skills/react-best-practices/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "react-best-practices", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/benchflow-ai/skillsbench/tree/main/tasks/fix-visual-stability/environment/skills/react-best-practicesType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add benchflow-ai/skillsbench --skill react-best-practices -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install benchflow-ai/skillsbench react-best-practices --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/benchflow-ai/skillsbench.git skills-src && mkdir -p .agents/skills && cp -r skills-src/tasks/fix-visual-stability/environment/skills/react-best-practices .agents/skills/react-best-practices && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "react-best-practices" agent skill from https://github.com/benchflow-ai/skillsbench/tree/main/tasks/fix-visual-stability/environment/skills/react-best-practices into .agents/skills/react-best-practices/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "react-best-practices", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add benchflow-ai/skillsbench --skill react-best-practices -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install benchflow-ai/skillsbench react-best-practices --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/benchflow-ai/skillsbench.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/tasks/fix-visual-stability/environment/skills/react-best-practices .cursor/skills/react-best-practices && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "react-best-practices" agent skill from https://github.com/benchflow-ai/skillsbench/tree/main/tasks/fix-visual-stability/environment/skills/react-best-practices into .cursor/skills/react-best-practices/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "react-best-practices", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/benchflow-ai/skillsbench.git --path tasks/fix-visual-stability/environment/skills/react-best-practices--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add benchflow-ai/skillsbench --skill react-best-practices -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install benchflow-ai/skillsbench react-best-practices --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/benchflow-ai/skillsbench.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/tasks/fix-visual-stability/environment/skills/react-best-practices .gemini/skills/react-best-practices && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "react-best-practices" agent skill from https://github.com/benchflow-ai/skillsbench/tree/main/tasks/fix-visual-stability/environment/skills/react-best-practices into .gemini/skills/react-best-practices/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "react-best-practices", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install benchflow-ai/skillsbench react-best-practicesInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add benchflow-ai/skillsbench --skill react-best-practices -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/benchflow-ai/skillsbench.git skills-src && mkdir -p .github/skills && cp -r skills-src/tasks/fix-visual-stability/environment/skills/react-best-practices .github/skills/react-best-practices && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "react-best-practices" agent skill from https://github.com/benchflow-ai/skillsbench/tree/main/tasks/fix-visual-stability/environment/skills/react-best-practices into .github/skills/react-best-practices/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "react-best-practices", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add benchflow-ai/skillsbench --skill react-best-practices -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install benchflow-ai/skillsbench react-best-practices --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/benchflow-ai/skillsbench.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/tasks/fix-visual-stability/environment/skills/react-best-practices .opencode/skills/react-best-practices && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "react-best-practices" agent skill from https://github.com/benchflow-ai/skillsbench/tree/main/tasks/fix-visual-stability/environment/skills/react-best-practices into .opencode/skills/react-best-practices/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "react-best-practices", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
react-best-practices- GitHub stars
- 1.8k
- Token cost
- ~1.3k tokens
- SKILL.md length
- 500 words
- Files
- 50
- Skills in repo
- 178
- Repo updated
- First seen
- Licence
- MIT
At a glance
IMPORTANT: Any change to React or Next.js code must read through this skill first.
- Works in 8 steps: Eliminating Waterfalls (CRITICAL) → Bundle Size Optimization (CRITICAL) → Server-Side Performance (HIGH) → …
- Tasks that involve React components
- SKILL.md covers When to Apply, Rule Categories by Priority, Quick Reference and How to Use
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
React Best Practices is an agent skill from benchflow-ai/skillsbench. IMPORTANT: Any change to React or Next.js code must read through this skill first. React and Next.js guidelines from Vercel Engineering covering visual instability, layout shifts, CLS, flickering, hydration issues, and font loading.
Its SKILL.md is about 1.3k tokens, which your agent loads only when the skill is triggered. The skill folder holds 50 other files (for example `rules/_sections.md`, `rules/_template.md` and `rules/advanced-event-handler-refs.md`).
It sits in Frontend & Design, covering React components. It works with React, Next.js and Vercel. The repository describes itself as: SkillsBench evaluates how well skills work and how effective agents are at using them. The licence is MIT.
When your agent uses it
- Tasks that involve React components
Example prompts
- “/react-best-practices”
Workflow steps
8 steps, taken from the step headings in SKILL.md.
What it can do on your machine
Read from SKILL.md and the folder at commit 9a1f4dd. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md.
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
React Best Practices loads about 1.3k tokens when it runs. Until then it costs about 64 tokens; SKILL.md has 500 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
The full file from benchflow-ai/skillsbench at commit 9a1f4dd, republished under its MIT licence (© benchflow-ai). 500 words, ~1,321 tokens.
Download SKILL.mdSave it as
.claude/skills/react-best-practices/SKILL.md (or your agent's skills folder). This skill also uses 49 other files; get the full folder from GitHub.- name
- react-best-practices
- description
- **IMPORTANT**: Any change to React or Next.js code must read through this skill first. React and Next.js guidelines from Vercel Engineering covering visual instability, layout shifts, CLS, flickering, hydration issues, and font loading.
- license
- MIT
- metadata.author
- vercel
- metadata.version
- 1.0.0
Vercel React Best Practices
Comprehensive performance optimization guide for React and Next.js applications, maintained by Vercel. Contains 45 rules across 8 categories, prioritized by impact to guide automated refactoring and code generation.
When to Apply
Reference these guidelines when:
- Refactoring existing React/Next.js code
- Writing new React components or Next.js pages
- Fixing visual instability or layout shift (CLS) issues
- Preventing flickering when reading from localStorage or cookies
- Handling hydration mismatches with client-only data
- Optimizing font loading (FOIT/FOUT prevention)
- Adding proper dimensions to images and dynamic content
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-defer-await- Move await into branches where actually usedasync-parallel- Use Promise.all() for independent operationsasync-dependencies- Use better-all for partial dependenciesasync-api-routes- Start promises early, await late in API routesasync-suspense-boundaries- Use Suspense to stream content
2. Bundle Size Optimization (CRITICAL)
bundle-barrel-imports- Import directly, avoid barrel filesbundle-dynamic-imports- Use next/dynamic for heavy componentsbundle-defer-third-party- Load analytics/logging after hydrationbundle-conditional- Load modules only when feature is activatedbundle-preload- Preload on hover/focus for perceived speed
3. Server-Side Performance (HIGH)
server-cache-react- Use React.cache() for per-request deduplicationserver-cache-lru- Use LRU cache for cross-request cachingserver-serialization- Minimize data passed to client componentsserver-parallel-fetching- Restructure components to parallelize fetchesserver-after-nonblocking- Use after() for non-blocking operations
4. Client-Side Data Fetching (MEDIUM-HIGH)
client-swr-dedup- Use SWR for automatic request deduplicationclient-event-listeners- Deduplicate global event listeners
5. Re-render Optimization (MEDIUM)
rerender-defer-reads- Don't subscribe to state only used in callbacksrerender-memo- Extract expensive work into memoized componentsrerender-dependencies- Use primitive dependencies in effectsrerender-derived-state- Subscribe to derived booleans, not raw valuesrerender-functional-setstate- Use functional setState for stable callbacksrerender-lazy-state-init- Pass function to useState for expensive valuesrerender-transitions- Use startTransition for non-urgent updates
Show full SKILL.md (179 more words)Show less
6. Rendering Performance (MEDIUM)
rendering-animate-svg-wrapper- Animate div wrapper, not SVG elementrendering-content-visibility- Use content-visibility for long listsrendering-hoist-jsx- Extract static JSX outside componentsrendering-svg-precision- Reduce SVG coordinate precisionrendering-hydration-no-flicker- Use inline script for client-only datarendering-activity- Use Activity component for show/hiderendering-conditional-render- Use ternary, not && for conditionals
7. JavaScript Performance (LOW-MEDIUM)
js-batch-dom-css- Group CSS changes via classes or cssTextjs-index-maps- Build Map for repeated lookupsjs-cache-property-access- Cache object properties in loopsjs-cache-function-results- Cache function results in module-level Mapjs-cache-storage- Cache localStorage/sessionStorage readsjs-combine-iterations- Combine multiple filter/map into one loopjs-length-check-first- Check array length before expensive comparisonjs-early-exit- Return early from functionsjs-hoist-regexp- Hoist RegExp creation outside loopsjs-min-max-loop- Use loop for min/max instead of sortjs-set-map-lookups- Use Set/Map for O(1) lookupsjs-tosorted-immutable- Use toSorted() for immutability
8. Advanced Patterns (LOW)
advanced-event-handler-refs- Store event handlers in refsadvanced-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
rules/_sections.mdEach rule file contains:
- Brief explanation of why it matters
- Incorrect code example with explanation
- Correct code example with explanation
- Additional context and references
© benchflow-ai, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
SKILL.md and 49 other files in tasks/fix-visual-stability/environment/skills/react-best-practices of benchflow-ai/skillsbench.
- SKILL.md
- rules/_sections.md
- rules/_template.md
- rules/advanced-event-handler-refs.md
- rules/advanced-use-latest.md
- rules/async-api-routes.md
- rules/async-defer-await.md
- rules/async-dependencies.md
- rules/async-parallel.md
- rules/async-suspense-boundaries.md
- rules/bundle-barrel-imports.md
- rules/bundle-conditional.md
- rules/bundle-defer-third-party.md
- rules/bundle-dynamic-imports.md
- rules/bundle-preload.md
- rules/client-event-listeners.md
- rules/client-localstorage-schema.md
- rules/client-passive-event-listeners.md
- rules/client-swr-dedup.md
- rules/js-batch-dom-css.md
- … and 30 more
Open the folder on GitHubat commit 9a1f4dd
Compare with similar skills
React Best Practices next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| React Best Practices this skillbenchflow-ai/skillsbench | 1.8k | — | ~1.3k | Automated safety check: Pass | MIT | |
| Vercel React Best Practicessanity-io/sanity | 6.4k | 130 repos | ~1.6k | Automated safety check: Pass | MIT | |
| React Best Practicesryokun6/ryos | 1.3k | — | ~2k | Automated safety check: Pass | MIT | |
| Vercel React Best Practicesgambitph/Stackable | 350 | — | ~2k | Automated safety check: Pass | MIT | |
| React Best Practicesmajiayu000/spellbook | 286 | — | ~1.1k | Automated safety check: Pass | MIT | |
| React Best Practices V2diegosouzapw/awesome-omni-skills | 159 | — | ~3.5k | Automated safety check: Pass | MIT |
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Related
Categories
Questions about React Best Practices
What does React Best Practices do?
IMPORTANT: Any change to React or Next.js code must read through this skill first. React Best Practices is an agent skill from benchflow-ai/skillsbench.js code must read through this skill first.
When should I use React Best Practices?
React Best Practices fits situations like: tasks that involve React components.
How do I install React Best Practices in Claude Code?
Run `npx skills add benchflow-ai/skillsbench --skill react-best-practices -a claude-code`. Or copy the skill folder (tasks/fix-visual-stability/environment/skills/react-best-practices in benchflow-ai/skillsbench) into .claude/skills/react-best-practices in your project. Claude Code loads it when a task matches its description.
How do I install React Best Practices in Codex?
Run `npx skills add benchflow-ai/skillsbench --skill react-best-practices -a codex`. Or copy the skill folder (tasks/fix-visual-stability/environment/skills/react-best-practices in benchflow-ai/skillsbench) into .agents/skills/react-best-practices in your project. Codex loads it when a task matches its description.
Can I use React Best Practices in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add benchflow-ai/skillsbench --skill react-best-practices -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/react-best-practices, .gemini/skills/react-best-practices, .github/skills/react-best-practices and .opencode/skills/react-best-practices in your project.
What does React Best Practices need to run?
SKILL.md names no scripts, command-line tools or credentials: React Best Practices is instructions for the agent only.
Does React Best Practices access the network?
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
Is React Best Practices safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does React Best Practices use?
React Best Practices is published under the MIT licence (declared in SKILL.md). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does React Best Practices use?
About 1.3k tokens (SKILL.md is roughly 5.3k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to React Best Practices?
Skills that share tags, products or a category with React Best Practices: Vercel React Best Practices (sanity-io/sanity, 6.4k stars), React Best Practices (ryokun6/ryos, 1.3k stars), Vercel React Best Practices (gambitph/Stackable, 350 stars) and React Best Practices (majiayu000/spellbook, 286 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains React Best Practices?
benchflow-ai (a GitHub organization) maintains it in benchflow-ai/skillsbench, which has 1,832 GitHub stars. The repository holds 178 skills in this directory. The repository was last updated on July 23, 2026.
Source: benchflow-ai/skillsbench on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.