nextjs-tanstack-query-cursorrules-prompt-file

nextjs-tanstack-query-cursorrules-prompt-file is a cursor rule for coding agents from PatrickJS/awesome-cursorrules. It costs 1,847 tokens per session, scanned A, original, CC0-1.0.

A set of Cursor coding rules for Next.js App Router projects using TanStack Query and TypeScript. It explains how server-rendered pages can provide initial data while browser code handles interactive changes, polling, and optimistic updates.

In plain words
What is it for?
Use it when building Next.js pages with interactive data, mutations, polling, optimistic interfaces, or infinite scrolling.
Why use it?
It helps prevent repeated requests and delayed page updates by keeping server and browser data fetching coordinated. It also standardises how the query cache is filled before the page becomes interactive.

Cursor rule

About the project

PatrickJS/awesome-cursorrules is a collection of Markdown rule files that give Cursor AI editor project-specific instructions about code, frameworks, workflows, and standards. Developers use it to find reusable guidance for shaping Cursor’s behavior in different kinds of software projects.

PatrickJS/awesome-cursorrules · 40,725 stars · on GitHub

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.

agentmods
npx agentmods add rules/patrickjs/awesome-cursorrules/nextjs-tanstack-query-cursorrules-prompt-file
Clone the repo
git clone --depth 1 https://github.com/PatrickJS/awesome-cursorrules

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-tanstack-query-cursorrules-prompt-file

README.md
[![agentmods](https://agentmods.dev/badge/rules/patrickjs/awesome-cursorrules/nextjs-tanstack-query-cursorrules-prompt-file.svg)](https://agentmods.dev/rules/patrickjs/awesome-cursorrules/nextjs-tanstack-query-cursorrules-prompt-file)
Your own site
<a href="https://agentmods.dev/rules/patrickjs/awesome-cursorrules/nextjs-tanstack-query-cursorrules-prompt-file"><img src="https://agentmods.dev/badge/rules/patrickjs/awesome-cursorrules/nextjs-tanstack-query-cursorrules-prompt-file.svg" alt="Measured on agentmods" height="20"></a>
Per session 1,847 This file is loaded in full into every session.
When invoked 1,847 The same file — it is already loaded in full.
Security scan A 0 findings. Scan, not verified.
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 $0.01847 $0.01847
Opus 5 $0.00924 $0.00924
Sonnet 5 $0.00369 $0.00369
Haiku 4.5 $0.00185 $0.00185

Measured yesterday against content hash a15c0b963ccf, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

nextjs-tanstack-query-cursorrules-prompt-file 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.

rules/nextjs-tanstack-query-cursorrules-prompt-file.mdc · 233 lines

How it starts

The opening of the file, as written. The whole thing — 233 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are an expert in Next.js (App Router), TanStack Query v5, TypeScript, and combining server components with client-side data fetching.

Next.js App Router + TanStack Query v5 Guidelines

Architecture Philosophy

  • Server Components fetch data directly (no TanStack Query needed there)
  • TanStack Query lives in Client Components for interactive, real-time, or user-triggered data
  • Use React Server Components for initial page data; TanStack Query for mutations, polling, and optimistic updates
  • Hydrate the Query cache from server to avoid client waterfalls on first load

Provider Setup with Hydration

// src/providers/query-provider.tsx
'use client'
import { QueryClient, QueryClientProvider } from '@tanstack/react-query'
import { ReactQueryDevtools } from '@tanstack/react-query-devtools'
import { useState } from 'react'

export function QueryProvider({ children }: { children: React.ReactNode }) {
  const [queryClient] = useState(
    () =>
      new QueryClient({
        defaultOptions: {
          queries: {
            staleTime: 60 * 1000,
            retry: (count, error: any) => error?.status !== 404 && count < 2,
          },
        },
      }),
  )

  return (
    <QueryClientProvider client={queryClient}>
      {children}
      <ReactQueryDevtools initialIsOpen={false} />
    </QueryClientProvider>
  )
}

// src/app/layout.tsx
import { QueryProvider } from '@/providers/query-provider'

export default function RootLayout({ children }: { children: React.ReactNode }) {
  return (
    <html>
      <body>
        <QueryProvider>{children}</QueryProvider>
      </body>
    </html>
  )
}

Hydration Pattern (Server → Client Cache)

  • Prefetch in Server Components, dehydrate state, rehydrate in client
  • This eliminates client-side loading states on first render
// src/app/posts/page.tsx (Server Component)
import { dehydrate, HydrationBoundary, QueryClient } from '@tanstack/react-query'
import { postsQueryOptions } from '@/queries/posts'
import { PostsList } from './_components/posts-list'

export default async function PostsPage() {
  const queryClient = new QueryClient()
  await queryClient.prefetchQuery(postsQueryOptions())

  return (
    <HydrationBoundary state={dehydrate(queryClient)}>
      <PostsList />
    </HydrationBoundary>
  )
}

// src/app/posts/_components/posts-list.tsx
'use client'
import { useQuery } from '@tanstack/react-query'
import { postsQueryOptions } from '@/queries/posts'

export function PostsList() {
  // Reads from pre-populated cache — no loading spinner
  const { data: posts } = useQuery(postsQueryOptions())
  return <ul>{posts?.map(p => <li key={p.id}>{p.title}</li>)}</ul>
}

Read the full file on GitHub · 233 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 · 233 lines · 1,847 tokens per session scan A a15c0b963ccf

Subscribe to this mod's changes

nextjs-tanstack-query-cursorrules-prompt-file is a cursor rule published in the GitHub repository PatrickJS/awesome-cursorrules (40,725 stars, last pushed 3mo ago), licensed CC0-1.0. It adds 1,847 tokens to every session, about $0.0092 per session on Opus 5. 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 2026-09-03.