nextjs

nextjs is a cursor rule for Cursor from lacymorrow/paperclip-hub. It costs 0 tokens per session (619 once invoked), scanned A, original, MIT.

Best practices for building applications with Next.js, a React framework for web apps. They cover server-rendered components, data loading, routing, caching, forms that change data, and error handling.

In plain words
What is it for?
It helps structure Next.js pages and layouts, load and cache data, handle dynamic routes, implement server-side changes, and show loading or error states.
Why use it?
It helps developers choose suitable places for server and browser code and avoid common problems with data loading, routing, and application state.

Cursor rule for Cursor

Written for Cursor: installed under .cursor/.

Good fit It helps structure Next.js pages and layouts, load and cache data, handle dynamic routes, implement server-side changes, and show loading or error states.

Compare 6 cursor rules from other repositories ↓
Install with agentmods
npx agentmods add rules/lacymorrow/paperclip-hub/nextjs
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Clone the repo
git clone --depth 1 https://github.com/lacymorrow/paperclip-hub

Made for: Cursor.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for nextjs

README.md
[![agentmods](https://agentmods.dev/badge/rules/lacymorrow/paperclip-hub/nextjs/github.svg)](https://agentmods.dev/rules/lacymorrow/paperclip-hub/nextjs)
Your own site
<a href="https://agentmods.dev/rules/lacymorrow/paperclip-hub/nextjs"><img src="https://agentmods.dev/badge/rules/lacymorrow/paperclip-hub/nextjs/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for nextjs

Your own site · 80×15
<a href="https://agentmods.dev/rules/lacymorrow/paperclip-hub/nextjs"><img src="https://agentmods.dev/badge/rules/lacymorrow/paperclip-hub/nextjs.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 0 Nothing until a file matches its globs; then the whole rule loads.
When invoked 619 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00000 $0.00619
Opus 5.5 $0.00000 $0.00248
Sonnet 5.5 $0.00000 $0.00124
Haiku 4.5 $0.00000 $0.00062

Measured yesterday against content hash 38e47f1a8f5a, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

nextjs scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured yesterday.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

.cursor/rules/nextjs.mdc · 120 lines

How it starts

The opening of the file, as written. The whole thing — 120 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Next.js Best Practices

params should be awaited before using its properties. searchParams should be awaited before using its properties. headers should be awaited before using its properties.

Server Components

  • Use Server Components by default
  • Keep client components minimal
  • Don't nest server in client components
  • Use proper data fetching patterns
  • Implement proper caching strategies
  • Handle streaming and suspense
  • Consider SEO implications

Data Fetching

  • Use Server Components for data fetching
  • Don't fetch data in Server Actions
  • Implement proper caching
  • Handle loading states
  • Consider revalidation strategies
  • Use proper error boundaries
  • Optimize for performance

Server Actions

  • Use for data mutations only
  • Keep business logic in services
  • Implement proper validation
  • Handle errors gracefully
  • Use proper typing
  • Consider optimistic updates
  • Document side effects

Routing

  • Use App Router
  • Implement proper layouts
  • Handle dynamic routes properly
  • Use proper loading UI
  • Implement error boundaries
  • Consider parallel routes
  • Handle intercepting routes

State Management

  • Use Server Components when possible
  • Keep client state minimal
  • Use hooks appropriately
  • Implement proper caching
  • Consider server state
  • Handle revalidation
  • Document state flow

Performance

  • Use proper image optimization
  • Implement proper caching
  • Consider bundle size
  • Use proper code splitting
  • Implement proper loading states
  • Monitor performance metrics
  • Optimize for Core Web Vitals

Security

  • Implement proper authentication
  • Use proper authorization
  • Handle CSRF protection
  • Implement proper headers
  • Use environment variables
  • Handle sensitive data
  • Regular security audits

Error Handling

  • Use error boundaries
  • Implement proper logging
  • Handle API errors
  • Consider recovery strategies
  • Document error scenarios
  • Monitor error rates
  • Implement proper fallbacks

Testing

  • Test Server Components
  • Test Server Actions
  • Implement E2E tests
  • Consider integration tests
  • Test error scenarios
  • Monitor test coverage
  • Document test strategy

Read the full file on GitHub · 120 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. yesterday First seen · 120 lines · 619 tokens per session scan A 38e47f1a8f5a

Subscribe to this mod's changes

nextjs is a cursor rule published in the GitHub repository lacymorrow/paperclip-hub (15 stars, last pushed yesterday), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 619 tokens. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-11-10.

Related

nextjs compared with cursor rules from other repositories

nextjs next to 6 cursor rules from other repositories
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nextjslacymorrow/paperclip-hubCursor rule15yesterdayMITA0Cursor
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codex-premium-website-skillsTheGoat395/Codex-SkillsCursor rule13720d agoMITA0Cursor
context-managementvibestackdev/vibe-stackCursor rule8yesterdayMITA0Cursor
project-contextvibestackdev/vibe-stackCursor rule8yesterdayMITA508Cursor
typescript-coding-styleWebDevPeterGriffin/The-VibeCode-BibleCursor rule427d agononeA128Cursor
javascript-typescript-code-styleWebDevPeterGriffin/The-VibeCode-BibleCursor rule427d agononeA88Cursor