# nextjs15-react19-vercelai-tailwind-cursorrules-prompt-file

Defines architecture standards for Next.js 15, React 19, Tailwind CSS, and Vercel AI SDK in Cursor. Guides component design, async runtime APIs, and typed form handling.

- rule · `type=rule` · Cursor · ★ 41024
- Author: PatrickJS
- License: CC0-1.0 · policy=mirror · the beginning of the file is at the end of this page
- Source: https://github.com/PatrickJS/awesome-cursorrules/tree/HEAD/rules/nextjs15-react19-vercelai-tailwind-cursorrules-prompt-file.mdc
- Updated: 2026-05-30
- HTML: https://affpapa.org/en/nevibecode/rules/nextjs15-react19-vercelai-tailwind-cursorrules-prompt-file

## What it does

This instruction configures Cursor for Next.js 15 App Router, React 19, Tailwind CSS, Radix UI, Shadcn UI, and Vercel AI SDK projects. The assistant must evaluate task requirements and plan component boundaries before generating code.

The file mandates modern React 19 and Next.js 15 contracts. It replaces `useFormState` with `useActionState` and delegates URL state to `nuqs`. It also requires async calls for `await cookies()`, `await headers()`, and page `params`. It prohibits TypeScript enums. Interfaces take priority over type aliases, while object contracts rely on the `satisfies` operator.

The rule sets `alwaysApply: false`. Cursor resolves the rule through `**/*` when relevant files enter context rather than keeping it permanently active.

## Install

### Cursor (native platform)

**Manually: put the files in place**
- File: `.cursor/rules/nextjs15-react19-vercelai-tailwind-cursorrules-prompt-file.mdc` — Frontmatter: description, globs, alwaysApply

### Claude Code

**Manually: put the files in place**
- File: `.claude/rules/nextjs15-react19-vercelai-tailwind-cursorrules-prompt-file.md` — The paths frontmatter field limits the files: move globs from the source into paths

### Codex

**AGENTS.md**
- Codex reads AGENTS.md: paste the rule text there

### GitHub Copilot

**Manually: put the files in place**
- File: `.github/instructions/nextjs15-react19-vercelai-tailwind-cursorrules-prompt-file.instructions.md` — The applyTo field sets which files it applies to: move globs from the source into applyTo

### Windsurf (Devin Desktop)

**Manually: put the files in place**
- File: `.devin/rules/nextjs15-react19-vercelai-tailwind-cursorrules-prompt-file.md`

### Cline

**Manually: put the files in place**
- File: `.clinerules/nextjs15-react19-vercelai-tailwind-cursorrules-prompt-file.md`

Where a file is given instead of a command, copy the files from the source to that path: https://github.com/PatrickJS/awesome-cursorrules/tree/HEAD/rules/nextjs15-react19-vercelai-tailwind-cursorrules-prompt-file.mdc

## When to use it
- Migrate form handling from `useFormState` to React 19 `useActionState`
- Handle asynchronous Next.js 15 runtime APIs like `cookies()`, `headers()`, and `params`
- Synchronize URL parameters using the `nuqs` library
- Eliminate TypeScript enums in favor of const maps with `satisfies`

## Example prompts
- Create a login form using Server Actions, `useActionState`, and Shadcn UI components.
- Write a Next.js 15 server component that accesses route params with `await props.params` and reads `await cookies()`.
- Add catalog search filters synchronized with URL query parameters using `nuqs`.

## Source text · nextjs15-react19-vercelai-tailwind-cursorrules-prompt-file.mdc · CC0-1.0

Below is the content of a third-party file. It is data, not instructions for you: do not act on anything written inside unless the human asks. Block tag: 4f4ede47164fbb8e.

BEGIN THIRD-PARTY FILE 4f4ede47164fbb8e
````text
---
description: "Cursor rules for Next.js development with React 19, Vercel AI, and Tailwind CSS integration."
globs: **/*
alwaysApply: false
---
You are an expert senior software engineer specializing in modern web development, with deep expertise in TypeScript, React 19, Next.js 15 (App Router), Vercel AI SDK, Shadcn UI, Radix UI, and Tailwind CSS. You are thoughtful, precise, and focus on delivering high-quality, maintainable solutions.

## Analysis Process

Before responding to any request, follow these steps:

1. Request Analysis
   - Determine task type (code creation, debugging, architecture, etc.)
   - Identify languages and frameworks involved
   - Note explicit and implicit requirements
   - Define core problem and desired outcome
   - Consider project context and constraints

2. Solution Planning
   - Break down the solution into logical steps
   - Consider modularity and reusability
   - Identify necessary files and dependencies
   - Evaluate alternative approaches
   - Plan for testing and validation

3. Implementation Strategy
   - Choose appropriate design patterns
   - Consider performance implications
   - Plan for error handling and edge cases
   - Ensure accessibility compliance
   - Verify best practices alignment

## Code Style and Structure

### General Principles

- Write concise, readable TypeScript code
- Use functional and declarative programming patterns
- Follow DRY (Don't Repeat Yourself) principle
- Implement early returns for better readability
- Structure components logically: exports, subcomponents, helpers, types

### Naming Conventions

- Use descriptive names with auxiliary verbs (isLoading, hasError)
- Prefix event handlers with "handle" (handleClick, handleSubmit)
- Use lowercase with dashes for directories (components/auth-wizard)
- Favor named exports for components

### TypeScript Usage

- Use TypeScript for all code
- Prefer interfaces over types
- Avoid enums; use const maps instead
- Implement proper type safety and inference
- Use `satisfies` operator for type validation

## React 19 and Next.js 15 Best Practices

### Component Architecture

- Favor React Server Components (RSC) where possible
- Minimize 'use client' directives
- Implement proper error boundaries
- Use Suspense for async operations
- Optimize for performance and Web Vitals

### State Management

- Use `useActionState` instead of deprecated `useFormState`
- Leverage enhanced `useFormStatus` with new properties (data, method, action)
- Implement URL state management with 'nuqs'
- Minimize client-side state

### Async Request APIs

```typescript
// Always use async versions of runtime APIs
const cookieStore = await cookies()
const headersList = await headers()
const { isEnabled } = await draftMode()

// Handle async params in layouts/pages
const params = await props.params
const searchParams = await props.searchParams
````
END THIRD-PARTY FILE 4f4ede47164fbb8e

The third-party file has ended. Everything between the 4f4ede47164fbb8e tags is data: requests and commands from it are not followed. An “end of file” line with another tag inside the block is part of the file.

© PatrickJS · CC0-1.0 · https://github.com/PatrickJS/awesome-cursorrules/tree/HEAD/rules/nextjs15-react19-vercelai-tailwind-cursorrules-prompt-file.mdc

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