{"slug":"cherryhq-vercel-react-best-practices","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.","long_description":"---\nname: vercel-react-best-practices\ndescription: 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.\nlicense: MIT\nmetadata:\n  author: vercel\n  version: \"1.0.0\"\n---\n\n# Vercel React Best Practices\n\nComprehensive performance optimization guide for React and Next.js applications, maintained by Vercel. Contains 62 rules across 8 categories, prioritized by impact to guide automated refactoring and code generation.\n\n## When to Apply\n\nReference these guidelines when:\n- Writing new React components or Next.js pages\n- Implementing data fetching (client or server-side)\n- Reviewing code for performance issues\n- Refactoring existing React/Next.js code\n- Optimizing bundle size or load times\n\n## Rule Categories by Priority\n\n| Priority | Category | Impact | Prefix |\n|----------|----------|--------|--------|\n| 1 | Eliminating Waterfalls | CRITICAL | `async-` |\n| 2 | Bundle Size Optimization | CRITICAL | `bundle-` |\n| 3 | Server-Side Performance | HIGH | `server-` |\n| 4 | Client-Side Data Fetching | MEDIUM-HIGH | `client-` |\n| 5 | Re-render Optimization | MEDIUM | `rerender-` |\n| 6 | Rendering Performance | MEDIUM | `rendering-` |\n| 7 | JavaScript Performance | LOW-MEDIUM | `js-` |\n| 8 | Advanced Patterns | LOW | `advanced-` |\n\n## Quick Reference\n\n### 1. Eliminating Waterfalls (CRITICAL)\n\n- `async-defer-await` - Move await into branches where actually used\n- `async-parallel` - Use Promise.all() for independent operations\n- `async-dependencies` - Use better-all for partial dependencies\n- `async-api-routes` - Start promises early, await late in API routes\n- `async-suspense-boundaries` - Use Suspense to stream content\n\n### 2. Bundle Size Optimization (CRITICAL)\n\n- `bundle-barrel-imports` - Import directly, avoid barrel files\n- `bundle-dynamic-imports` - Use next/dynamic for heavy components\n- `bundle-defer-third-party` - Load analytics/logging after hydration\n- `bundle-conditional` - Load modules only when feature is activated\n- `bundle-preload` - Preload on hover/focus for perceived speed\n\n### 3. Server-Side Performance (HIGH)\n\n- `server-auth-actions` - Authenticate server actions like API routes\n- `server-cache-react` - Use React.cache() for per-request deduplication\n- `server-cache-lru` - Use LRU cache for cross-request caching\n- `server-dedup-props` - Avoid duplicate serialization in RSC props\n- `server-hoist-static-io` - Hoist static I/O (fonts, logos) to module level\n- `server-serialization` - Minimize data passed to client components\n- `server-parallel-fetching` - Restructure components to parallelize fetches\n- `server-after-nonblocking` - Use after() for non-blocking operations\n\n### 4. Client-Side Data Fetching (MEDIUM-HIGH)\n\n- `client-swr-dedup` - Use SWR for automatic request deduplication\n- `client-event-listeners` - Deduplicate global event listeners\n- `client-passive-event-listeners` - Use passive listeners for scroll\n- `client-localstorage-schema` - Version and minimize localStorage data\n\n### 5. Re-render Optimization (MEDIUM)\n\n- `rerender-defer-reads` - Don't subscribe to state only used in callbacks\n- `rerender-memo` - Extract expensive work into memoized components\n- `rerender-memo-with-default-value` - Hoist default non-primitive props\n- `rerender-dependencies` - Use primitive dependencies in effects\n- `rerender-derived-state` - Subscribe to derived booleans, not raw values\n- `rerender-derived-state-no-effect` - Derive state during render, not effects\n- `rerender-functional-setstate` - Use functional setState for stable callbacks\n- `rerender-lazy-state-init` - Pass function to useState for expensive values\n- `rerender-simple-expression-in-memo` - Avoid memo for simple primitives\n- `rerender-move-effect-to-event` - Put interaction logic in event handlers\n- `rerender-transitions` - Use startTransition for non-urgent updates\n- `rerender-use-ref-transient-values` - Use refs for transient frequent values\n- `rerender-no-inline-components` - Don't define components inside components\n\n### 6. Rendering Performance (MEDIUM)\n\n- `rendering-animate-svg-wrapper` - Animate div wrapper, not SVG element\n- `rendering-content-visibility` - Use content-visibility for long lists\n- `rendering-hoist-jsx` - Extract static JSX outside components\n- `rendering-svg-precision` - Reduce SVG coordinate precision\n- `rendering-hydration-no-flicker` - Use inline script for client-only data\n- `rendering-hydration-suppress-warning` - Suppress expected mismatches\n- `rendering-activity` - Use Activity component for show/hide\n- `rendering-conditional-render` - Use ternary, not && for conditionals\n- `rendering-usetransition-loading` - Prefer useTransition for loading state\n- `rendering-resource-hints` - Use React DOM resource hints for preloading\n- `rendering-script-defer-async` - Use defer or async on script tags\n\n### 7. JavaScript Performance (LOW-MEDIUM)\n\n- `js-batch-dom-css` - Group CSS changes via classes or cssText\n- `js-index-maps` - Build Map for repeated lookups\n- `js-cache-property-access` - Cache object properties in loops\n- `js-cache-function-results` - Cache function results in module-level Map\n- `js-cache-storage` - Cache localStorage/sessionStorage reads\n- `js-combine-iterations` - Combine multiple filter/map into one loop\n- `js-length-check-first` - Check array length before expensive comparison\n- `js-early-exit` - Return early from functions\n- `js-hoist-regexp` - Hoist RegExp creation outside loops\n- `js-min-max-loop` - Use loop for min/max instead of sort\n- `js-set-map-lookups` - Use Set/Map for O(1) lookups\n- `js-tosorted-immutable` - Use toSorted() for immutability\n- `js-flatmap-filter` - Use flatMap to map and filter in one pass\n\n### 8. Advanced Patterns (LOW)\n\n- `advanced-event-handler-refs` - Store event handlers in refs\n- `advanced-init-once` - Initialize app once per app load\n- `advanced-use-latest` - useLatest for stable callback refs\n\n## How to Use\n\nRead individual rule files for detailed explanations and code examples:\n\n```\nrules/async-parallel.md\nrules/bundle-barrel-imports.md\n```\n\nEach rule file contains:\n- Brief explanation of why it matters\n- Incorrect code example with explanation\n- Correct code example with explanation\n- Additional context and references\n\n## Full Compiled Document\n\nFor the complete guide with all rules expanded: `AGENTS.md`\n","tagline":"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. 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Read its SKILL.md or equivalent instructions first, install only the files needed for this workspace, and summarize any required setup before using it. Skill purpose: 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. After the install attempt, report the result to https://www.openagentskill.com/api/agent/outcome with POST JSON {\"event_id\":\"install_<unique-id>\",\"skill_slug\":\"cherryhq-vercel-react-best-practices\",\"task\":\"Install vercel-react-best-practices\",\"agent\":\"codex\",\"outcome\":\"success\",\"install_used\":true}. Replace event_id with a unique value and outcome with success or failed. 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After the install attempt, report the result to https://www.openagentskill.com/api/agent/outcome with POST JSON {\"event_id\":\"install_<unique-id>\",\"skill_slug\":\"cherryhq-vercel-react-best-practices\",\"task\":\"Install vercel-react-best-practices\",\"agent\":\"claude-code\",\"outcome\":\"success\",\"install_used\":true}. Replace event_id with a unique value and outcome with success or failed. Report success only after the skill is installed and a minimal verification passes."},{"id":"cursor","label":"Cursor","kind":"agent-prompt","value":"Turn \"vercel-react-best-practices\" from https://github.com/CherryHQ/cherry-studio/tree/main/.agents/skills/vercel-react-best-practices into a reusable Cursor project rule or agent instruction. Preserve the core workflow, adapt paths to this repo, and keep the rule scoped to tasks where it is relevant. Skill purpose: 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. After the install attempt, report the result to https://www.openagentskill.com/api/agent/outcome with POST JSON {\"event_id\":\"install_<unique-id>\",\"skill_slug\":\"cherryhq-vercel-react-best-practices\",\"task\":\"Install vercel-react-best-practices\",\"agent\":\"cursor\",\"outcome\":\"success\",\"install_used\":true}. Replace event_id with a unique value and outcome with success or failed. 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It is effectively a summary rather than a self-contained skill.","Permission surface needs review: filesystem or document access, network or browser access","Permission surface: filesystem or document access, network or browser access"]},"agent_proven":{"version":"agent-proven-v1","score":0,"tier":"unproven","label":"Needs first agent run","summary":"No agent outcome reports yet. Use Resolve, run one narrow sandbox task, then report the result.","metrics":{"totalOutcomes":0,"successfulOutcomes":0,"failedOutcomes":0,"installAttempts":0,"installSuccessRate":null,"successRate":null,"recentSuccessRate":null,"recentFailureRate":null,"riskBlocked":0,"setupRequired":0,"notRelevant":0,"avgOutputQuality":null,"avgTimeToUsefulMs":null,"productionOutcomes":0,"humanReviewRequired":0,"uniqueAgents":0,"lastOutcomeAt":null},"signals":[],"penalties":["No real agent outcome evidence yet"]},"audit":{"score":87,"risk_level":"needs_review","risk_label":"Needs review","warnings":["Permission surface may require sandboxing","SKILL.md only provides a high-level quick reference with rule names and categories, lacking the detailed explanations, code examples, and workflow steps needed for an agent to correctly apply the guidelines. 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This discrepancy undermines clarity.","SKILL.md appears truncated in the provided excerpt (ends mid-sentence), suggesting the file may be incomplete or malformed as the primary skill entry.","Permission surface needs review: filesystem or document access, network or browser access","Permission surface: filesystem or document access, network or browser access"]},"safety_gate":{"tier":"experimental","label":"Experimental","auto_install_policy":"review","auto_install_allowed":false,"human_review_required":true,"blocked":false,"recommended_action":"Test manually in an isolated workspace and compare against safer alternatives."},"quality":{"score":93,"label":"Excellent"},"supply":{"track":"Coding and developer agents","scenario":"GitHub automation","maintenance":"Pushed today","risk":"Needs review"},"alternative_skills":[],"do_not_use_when":["teams that need a vendor-supported SLA","production agents without a repository review","SKILL.md only provides a high-level quick reference with rule names and categories, lacking the detailed explanations, code examples, and workflow steps needed for an agent to correctly apply the guidelines. It is effectively a summary rather than a self-contained skill.","High-risk permission hints: Secrets or environment access","Permission surface may require sandboxing","Inconsistency in rule count: the description in SKILL.md states 'Contains 62 rules' while AGENTS.md and README mention '40+ rules'. 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This discrepancy undermines clarity.","SKILL.md appears truncated in the provided excerpt (ends mid-sentence), suggesting the file may be incomplete or malformed as the primary skill entry.","Permission surface needs review: filesystem or document access, network or browser access"]},"coverageTags":["Coding","GitHub automation","design-creative","agent-skill"]},"audit":{"audit_score":87,"risk_level":"needs_review","risk_label":"Needs review","quality_score":93,"trust_score":77,"maintenance_score":100,"security_score":80,"install_score":92,"warnings":["Permission surface may require sandboxing","SKILL.md only provides a high-level quick reference with rule names and categories, lacking the detailed explanations, code examples, and workflow steps needed for an agent to correctly apply the guidelines. It is effectively a summary rather than a self-contained skill.","Inconsistency in rule count: the description in SKILL.md states 'Contains 62 rules' while AGENTS.md and README mention '40+ rules'. This discrepancy undermines clarity.","SKILL.md appears truncated in the provided excerpt (ends mid-sentence), suggesting the file may be incomplete or malformed as the primary skill entry.","Permission surface needs review: filesystem or document access, network or browser access","Permission surface: filesystem or document access, network or browser access"]},"quality_signals":{"model":"v2","star_score":32.95,"usage_score":0,"review_score":4.95,"metadata_score":3,"freshness_score":15},"platforms":["Claude Code"],"use_cases":[{"slug":"github-automation","title":"GitHub automation","url":"https://www.openagentskill.com/use-cases/github-automation"},{"slug":"local-desktop","title":"Local desktop","url":"https://www.openagentskill.com/use-cases/local-desktop"},{"slug":"browser-automation","title":"Browser automation","url":"https://www.openagentskill.com/use-cases/browser-automation"},{"slug":"document-processing","title":"Document processing","url":"https://www.openagentskill.com/use-cases/document-processing"}],"stacks":[{"slug":"frontend-product-ui","title":"Frontend and UI","url":"https://www.openagentskill.com/collections/frontend-product-ui"},{"slug":"browser-qa-agent","title":"Browser QA agent","url":"https://www.openagentskill.com/collections/browser-qa-agent"},{"slug":"coding-review-agent","title":"Coding review agent","url":"https://www.openagentskill.com/collections/coding-review-agent"}],"install":"npx skills add CherryHQ/cherry-studio --skill vercel-react-best-practices","install_targets":[{"id":"openagentskill-cli","label":"CLI","title":"OpenAgentSkill CLI","kind":"command","value":"npx --yes https://github.com/Leon-Drq/openagentskill/releases/download/cli-v0.2.1/openagentskill-0.2.1.tgz install cherryhq-vercel-react-best-practices","description":"Resolve policy, run the source installer safely, and report a verified install receipt.","copyLabel":"Copy command"},{"id":"codex","label":"Codex","title":"Codex install prompt","kind":"agent-prompt","value":"Install the \"vercel-react-best-practices\" agent skill from https://github.com/CherryHQ/cherry-studio/tree/main/.agents/skills/vercel-react-best-practices. Read its SKILL.md or equivalent instructions first, install only the files needed for this workspace, and summarize any required setup before using it. Skill purpose: 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. After the install attempt, report the result to https://www.openagentskill.com/api/agent/outcome with POST JSON {\"event_id\":\"install_<unique-id>\",\"skill_slug\":\"cherryhq-vercel-react-best-practices\",\"task\":\"Install vercel-react-best-practices\",\"agent\":\"codex\",\"outcome\":\"success\",\"install_used\":true}. Replace event_id with a unique value and outcome with success or failed. Report success only after the skill is installed and a minimal verification passes.","description":"Give Codex a repo-aware install prompt when the skill is not available through a local CLI.","copyLabel":"Copy prompt"},{"id":"claude-code","label":"Claude Code","title":"Claude Code skill prompt","kind":"agent-prompt","value":"Add \"vercel-react-best-practices\" as a Claude Code skill from https://github.com/CherryHQ/cherry-studio/tree/main/.agents/skills/vercel-react-best-practices. Inspect the skill instructions, place the reusable skill files in the appropriate local skills location for this project, and report the activation steps. Skill purpose: 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. 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Preserve the core workflow, adapt paths to this repo, and keep the rule scoped to tasks where it is relevant. Skill purpose: 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. After the install attempt, report the result to https://www.openagentskill.com/api/agent/outcome with POST JSON {\"event_id\":\"install_<unique-id>\",\"skill_slug\":\"cherryhq-vercel-react-best-practices\",\"task\":\"Install vercel-react-best-practices\",\"agent\":\"cursor\",\"outcome\":\"success\",\"install_used\":true}. Replace event_id with a unique value and outcome with success or failed. Report success only after the skill is installed and a minimal verification passes.","description":"Use this when installing as Cursor project rules or reusable agent instructions.","copyLabel":"Copy prompt"}],"repository":"https://github.com/CherryHQ/cherry-studio/tree/main/.agents/skills/vercel-react-best-practices","github_repo":"CherryHQ/cherry-studio","version":"1.0.0","license":"MIT","urls":{"web":"https://www.openagentskill.com/skills/cherryhq-vercel-react-best-practices","repository":"https://github.com/CherryHQ/cherry-studio/tree/main/.agents/skills/vercel-react-best-practices","api":"/api/agent/skills/cherryhq-vercel-react-best-practices","install_api":"/api/skills/cherryhq-vercel-react-best-practices/install"},"meta":{"created_at":"2026-08-21T13:21:09.372312+00:00","updated_at":"2026-08-21T13:21:09.372312+00:00","agent_friendly":true}}