vercel-react-best-practices

Name: vercel-react-best-practices
Author: vercel-labs

53installs750forks

How to install vercel-react-best-practices?

vercel-labs/open-agents/vercel-react-best-practices

$npx -y skills add vercel-labs/open-agents --skill vercel-react-best-practices

Installs into the current project.

Summary

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,

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SKILL.md

1	# Vercel React Best Practices
2
3	Comprehensive performance optimization guide for React and Next.js applications, maintained by Vercel. Contains 58 rules across 8 categories, prioritized by impact to guide automated refactoring and code generation.
4
5	## When to Apply
6
7	Reference these guidelines when:
8	- Writing new React components or Next.js pages
9	- Implementing data fetching (client or server-side)
10	- Reviewing code for performance issues
11	- Refactoring existing React/Next.js code
12	- Optimizing bundle size or load times
13
14	## Rule Categories by Priority
15
16	\| Priority \| Category \| Impact \| Prefix \|
17	\|----------\|----------\|--------\|--------\|
18	\| 1 \| Eliminating Waterfalls \| CRITICAL \| `async-` \|
19	\| 2 \| Bundle Size Optimization \| CRITICAL \| `bundle-` \|
20	\| 3 \| Server-Side Performance \| HIGH \| `server-` \|
21	\| 4 \| Client-Side Data Fetching \| MEDIUM-HIGH \| `client-` \|
22	\| 5 \| Re-render Optimization \| MEDIUM \| `rerender-` \|
23	\| 6 \| Rendering Performance \| MEDIUM \| `rendering-` \|
24	\| 7 \| JavaScript Performance \| LOW-MEDIUM \| `js-` \|
25	\| 8 \| Advanced Patterns \| LOW \| `advanced-` \|
26
27	## Quick Reference
28
29	### 1. Eliminating Waterfalls (CRITICAL)
30
31	- `async-defer-await` - Move await into branches where actually used
32	- `async-parallel` - Use Promise.all() for independent operations
33	- `async-dependencies` - Use better-all for partial dependencies
34	- `async-api-routes` - Start promises early, await late in API routes
35	- `async-suspense-boundaries` - Use Suspense to stream content
36
37	### 2. Bundle Size Optimization (CRITICAL)
38
39	- `bundle-barrel-imports` - Import directly, avoid barrel files
40	- `bundle-dynamic-imports` - Use next/dynamic for heavy components
41	- `bundle-defer-third-party` - Load analytics/logging after hydration
42	- `bundle-conditional` - Load modules only when feature is activated
43	- `bundle-preload` - Preload on hover/focus for perceived speed
44
45	### 3. Server-Side Performance (HIGH)
46
47	- `server-auth-actions` - Authenticate server actions like API routes
48	- `server-cache-react` - Use React.cache() for per-request deduplication
49	- `server-cache-lru` - Use LRU cache for cross-request caching
50	- `server-dedup-props` - Avoid duplicate serialization in RSC props
51	- `server-hoist-static-io` - Hoist static I/O (fonts, logos) to module level
52	- `server-serialization` - Minimize data passed to client components
53	- `server-parallel-fetching` - Restructure components to parallelize fetches
54	- `server-after-nonblocking` - Use after() for non-blocking operations
55
56	### 4. Client-Side Data Fetching (MEDIUM-HIGH)
57
58	- `client-swr-dedup` - Use SWR for automatic request deduplication
59	- `client-event-listeners` - Deduplicate global event listeners
60	- `client-passive-event-listeners` - Use passive listeners for scroll
61	- `client-localstorage-schema` - Version and minimize localStorage data
62
63	### 5. Re-render Optimization (MEDIUM)
64
65	- `rerender-defer-reads` - Don't subscribe to state only used in callbacks
66	- `rerender-memo` - Extract expensive work into memoized components
67	- `rerender-memo-with-default-value` - Hoist default non-primitive props
68	- `rerender-dependencies` - Use primitive dependencies in effects
69	- `rerender-derived-state` - Subscribe to derived booleans, not raw values
70	- `rerender-derived-state-no-effect` - Derive state during render, not effects
71	- `rerender-functional-setstate` - Use functional setState for stable callbacks
72	- `rerender-lazy-state-init` - Pass function to useState for expensive values
73	- `rerender-simple-expression-in-memo` - Avoid memo for simple primitives
74	- `rerender-move-effect-to-event` - Put interaction logic in event handlers
75	- `rerender-transitions` - Use startTransition for non-urgent updates
76	- `rerender-use-ref-transient-values` - Use refs for transient frequent values
77
78	### 6. Rendering Performance (MEDIUM)
79
80	- `rendering-animate-svg-wrapper` - Animate div wrapper, not SVG element
81	- `rendering-content-visibility` - Use content-visibility for long lists
82	- `rendering-hoist-jsx` - Extract static JSX outside components
83	- `rendering-svg-precision` - Reduce SVG coordinate precision
84	- `rendering-hydration-no-flicker` - Use inline script for client-only data
85	- `rendering-hydration-suppress-warning` - Suppress expected mismatches
86	- `rendering-activity` - Use Activity component for show/hide
87	- `rendering-conditional-render` - Use ternary, not && for conditionals
88	- `rendering-usetransition-loading` - Prefer useTransition for loading state
89
90	### 7. JavaScript Performance (LOW-MEDIUM)
91
92	- `js-batch-dom-css` - Group CSS changes via classes or cssText
93	- `js-index-maps` - Build Map for repeated lookups
94	- `js-cache-property-

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vercel-react-best-practices

53installs750forks

View on GitHub

How to install vercel-react-best-practices?

vercel-labs/open-agents/vercel-react-best-practices

$npx -y skills add vercel-labs/open-agents --skill vercel-react-best-practices

Installs into the current project.

Summary

Files · 1

View on GitHub

SKILL.md

1	# Vercel React Best Practices
2
3	Comprehensive performance optimization guide for React and Next.js applications, maintained by Vercel. Contains 58 rules across 8 categories, prioritized by impact to guide automated refactoring and code generation.
4
5	## When to Apply
6
7	Reference these guidelines when:
8	- Writing new React components or Next.js pages
9	- Implementing data fetching (client or server-side)
10	- Reviewing code for performance issues
11	- Refactoring existing React/Next.js code
12	- Optimizing bundle size or load times
13
14	## Rule Categories by Priority
15
16	\| Priority \| Category \| Impact \| Prefix \|
17	\|----------\|----------\|--------\|--------\|
18	\| 1 \| Eliminating Waterfalls \| CRITICAL \| `async-` \|
19	\| 2 \| Bundle Size Optimization \| CRITICAL \| `bundle-` \|
20	\| 3 \| Server-Side Performance \| HIGH \| `server-` \|
21	\| 4 \| Client-Side Data Fetching \| MEDIUM-HIGH \| `client-` \|
22	\| 5 \| Re-render Optimization \| MEDIUM \| `rerender-` \|
23	\| 6 \| Rendering Performance \| MEDIUM \| `rendering-` \|
24	\| 7 \| JavaScript Performance \| LOW-MEDIUM \| `js-` \|
25	\| 8 \| Advanced Patterns \| LOW \| `advanced-` \|
26
27	## Quick Reference
28
29	### 1. Eliminating Waterfalls (CRITICAL)
30
31	- `async-defer-await` - Move await into branches where actually used
32	- `async-parallel` - Use Promise.all() for independent operations
33	- `async-dependencies` - Use better-all for partial dependencies
34	- `async-api-routes` - Start promises early, await late in API routes
35	- `async-suspense-boundaries` - Use Suspense to stream content
36
37	### 2. Bundle Size Optimization (CRITICAL)
38
39	- `bundle-barrel-imports` - Import directly, avoid barrel files
40	- `bundle-dynamic-imports` - Use next/dynamic for heavy components
41	- `bundle-defer-third-party` - Load analytics/logging after hydration
42	- `bundle-conditional` - Load modules only when feature is activated
43	- `bundle-preload` - Preload on hover/focus for perceived speed
44
45	### 3. Server-Side Performance (HIGH)
46
47	- `server-auth-actions` - Authenticate server actions like API routes
48	- `server-cache-react` - Use React.cache() for per-request deduplication
49	- `server-cache-lru` - Use LRU cache for cross-request caching
50	- `server-dedup-props` - Avoid duplicate serialization in RSC props
51	- `server-hoist-static-io` - Hoist static I/O (fonts, logos) to module level
52	- `server-serialization` - Minimize data passed to client components
53	- `server-parallel-fetching` - Restructure components to parallelize fetches
54	- `server-after-nonblocking` - Use after() for non-blocking operations
55
56	### 4. Client-Side Data Fetching (MEDIUM-HIGH)
57
58	- `client-swr-dedup` - Use SWR for automatic request deduplication
59	- `client-event-listeners` - Deduplicate global event listeners
60	- `client-passive-event-listeners` - Use passive listeners for scroll
61	- `client-localstorage-schema` - Version and minimize localStorage data
62
63	### 5. Re-render Optimization (MEDIUM)
64
65	- `rerender-defer-reads` - Don't subscribe to state only used in callbacks
66	- `rerender-memo` - Extract expensive work into memoized components
67	- `rerender-memo-with-default-value` - Hoist default non-primitive props
68	- `rerender-dependencies` - Use primitive dependencies in effects
69	- `rerender-derived-state` - Subscribe to derived booleans, not raw values
70	- `rerender-derived-state-no-effect` - Derive state during render, not effects
71	- `rerender-functional-setstate` - Use functional setState for stable callbacks
72	- `rerender-lazy-state-init` - Pass function to useState for expensive values
73	- `rerender-simple-expression-in-memo` - Avoid memo for simple primitives
74	- `rerender-move-effect-to-event` - Put interaction logic in event handlers
75	- `rerender-transitions` - Use startTransition for non-urgent updates
76	- `rerender-use-ref-transient-values` - Use refs for transient frequent values
77
78	### 6. Rendering Performance (MEDIUM)
79
80	- `rendering-animate-svg-wrapper` - Animate div wrapper, not SVG element
81	- `rendering-content-visibility` - Use content-visibility for long lists
82	- `rendering-hoist-jsx` - Extract static JSX outside components
83	- `rendering-svg-precision` - Reduce SVG coordinate precision
84	- `rendering-hydration-no-flicker` - Use inline script for client-only data
85	- `rendering-hydration-suppress-warning` - Suppress expected mismatches
86	- `rendering-activity` - Use Activity component for show/hide
87	- `rendering-conditional-render` - Use ternary, not && for conditionals
88	- `rendering-usetransition-loading` - Prefer useTransition for loading state
89
90	### 7. JavaScript Performance (LOW-MEDIUM)
91
92	- `js-batch-dom-css` - Group CSS changes via classes or cssText
93	- `js-index-maps` - Build Map for repeated lookups
94	- `js-cache-property-

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