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/front-end-rule)<a href="https://agentmods.dev/rules/vinhnx/vtchat/front-end-rule"><img src="https://agentmods.dev/badge/rules/vinhnx/vtchat/front-end-rule/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/front-end-rule"><img src="https://agentmods.dev/badge/rules/vinhnx/vtchat/front-end-rule.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 | $0.00528 | $0.00528 |
| Opus 5.5 | $0.00211 | $0.00211 |
| Sonnet 5.5 | $0.00106 | $0.00106 |
| Haiku 4.5 | $0.00053 | $0.00053 |
Grade A, and why
front-end-rule 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.
What it actually says
Frontend
Use HTML imports with Bun.serve(). Don't use vite. HTML imports fully support React, CSS, Tailwind.
Server:
import index from "./index.html"
Bun.serve({
routes: {
"/": index,
"/api/users/:id": {
GET: (req) => {
return new Response(JSON.stringify({ id: req.params.id }));
},
},
},
// optional websocket support
websocket: {
open: (ws) => {
ws.send("Hello, world!");
},
message: (ws, message) => {
ws.send(message);
},
close: (ws) => {
// handle close
}
},
development: {
hmr: true,
console: true,
}
})
HTML files can import .tsx, .jsx or .js files directly and Bun's bundler will transpile & bundle automatically. <link> tags can point to stylesheets and Bun's CSS bundler will bundle.
<html>
<body>
<h1>Hello, world!</h1>
<script type="module" src="./frontend.tsx"></script>
</body>
</html>
With the following frontend.tsx:
import React from "react";
// import .css files directly and it works
import './index.css';
import { createRoot } from "react-dom/client";
const root = createRoot(document.body);
export default function Frontend() {
return <h1>Hello, world!</h1>;
}
root.render(<Frontend />);
Then, run index.ts
bun --hot ./index.ts
For more information, read the Bun API docs in node_modules/bun-types/docs/**.md.
UI components
- when try to install components, navigatete to ~/Developer/learn-by-doing/vtchat/packages/ui first, then use bunx
- To install shadcn components, check example command:
npx shadcn@latest add label - Use shadcn/ui components for UI elements
- Use
@repo/uifor shared UI components - Use lucide icons from
lucide-react - Use Tailwind CSS for styling
- Use
clsxfor conditional class names - Use
tailwind-mergefor merging Tailwind classes - Use
framer-motionfor animations
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 · 92 lines · 528 tokens per session scan A 410f7603086a
front-end-rule is a cursor rule published in the GitHub repository vinhnx/vtchat (59 stars, last pushed 1mo ago), licensed MIT. It adds 528 tokens to every session, about $0.0021 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
components
React component, styling, theme, accessibility, and RTL instructions.
frontend-development
Most coagents examples have a ui/ folder with Next.js applications.
examples-and-demos
Multi-agent systems with complex workflows.
suggestions-development
When working with suggesitons, always load this up.
agent-development
Python agents are typically in folders named agent-py/ or agent/ and use the sdk-python/ package.
development-workflow
CopilotKit uses a monorepo structure with.