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.
git clone --depth 1 https://github.com/vinhnx/vtchatWrote 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.
[](https://agentmods.dev/rules/vinhnx/vtchat/nextjs15-react19-vercelai-tailwind)<a href="https://agentmods.dev/rules/vinhnx/vtchat/nextjs15-react19-vercelai-tailwind"><img src="https://agentmods.dev/badge/rules/vinhnx/vtchat/nextjs15-react19-vercelai-tailwind/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.
<a href="https://agentmods.dev/rules/vinhnx/vtchat/nextjs15-react19-vercelai-tailwind"><img src="https://agentmods.dev/badge/rules/vinhnx/vtchat/nextjs15-react19-vercelai-tailwind.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00012 | $0.00591 |
| Opus 5.5 | $0.00005 | $0.00236 |
| Sonnet 5.5 | $0.00002 | $0.00118 |
| Haiku 4.5 | $0.00001 | $0.00059 |
Grade A, and why
nextjs15-react19-vercelai-tailwind 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 today.
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.
How it starts
The opening of the file, as written. The whole thing — 87 lines — stays where its author put it; the contents beside it link to each section on GitHub.
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:
-
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
-
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
-
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
satisfiesoperator 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
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.
- today First seen · 87 lines · 12 tokens per session scan A 14fe1b75d4f6
nextjs15-react19-vercelai-tailwind is a cursor rule published in the GitHub repository vinhnx/vtchat (59 stars, last pushed 1mo ago), licensed MIT. It adds 12 tokens to every session and 591 once invoked, about $0.0000 per session on Opus 5.5. 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 2026-10-15.
Other cursor rules, from other repositories
agent-development
Python agents are typically in folders named agent-py/ or agent/ and use the sdk-python/ package.
update-ai-sdk
Update ai-sdk(ai, @ai/) to latest.
nestjs-best-practices
../../.claude/rules/nestjs-best-practices.md.
all-ts
../../.claude/rules/all-ts.md.
project-core
Repository-wide project instructions. Canonical rules are in AGENTS.md.
components
React component, styling, theme, accessibility, and RTL instructions.