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/pylarco/diff-applyWrote 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/pylarco/diff-apply/use-bun-instead-of-node-vite-npm-pnpm)<a href="https://agentmods.dev/rules/pylarco/diff-apply/use-bun-instead-of-node-vite-npm-pnpm"><img src="https://agentmods.dev/badge/rules/pylarco/diff-apply/use-bun-instead-of-node-vite-npm-pnpm/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/pylarco/diff-apply/use-bun-instead-of-node-vite-npm-pnpm"><img src="https://agentmods.dev/badge/rules/pylarco/diff-apply/use-bun-instead-of-node-vite-npm-pnpm.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 | $0.00000 | $0.00697 |
| Opus 5 | $0.00000 | $0.00349 |
| Sonnet 5 | $0.00000 | $0.00139 |
| Haiku 4.5 | $0.00000 | $0.00070 |
Grade A, and why
use-bun-instead-of-node-vite-npm-pnpm scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 7d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
This is a copy
98% identical to use-bun-instead-of-node-vite-npm-pnpm — 3 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 100 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Default to using Bun instead of Node.js.
- Use
bun <file>instead ofnode <file>orts-node <file> - Use
bun testinstead ofjestorvitest - Use
bun build <file.html|file.ts|file.css>instead ofwebpackoresbuild - Use
bun installinstead ofnpm installoryarn installorpnpm install - Use
bun run <script>instead ofnpm run <script>oryarn run <script>orpnpm run <script> - Bun automatically loads .env, so don't use dotenv.
APIs
Bun.serve()supports WebSockets, HTTPS, and routes. Don't useexpress.bun:sqlitefor SQLite. Don't usebetter-sqlite3.Bun.redisfor Redis. Don't useioredis.Bun.sqlfor Postgres. Don't usepgorpostgres.js.WebSocketis built-in. Don't usews.- Prefer
Bun.fileovernode:fs's readFile/writeFile - Bun.$
lsinstead of execa.
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 />);
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.
- 7d ago First seen · 100 lines · 0 tokens per session scan A 86c6d9c0f94c
use-bun-instead-of-node-vite-npm-pnpm is a cursor rule published in the GitHub repository pylarco/diff-apply (10 stars, last pushed 1y ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 697 tokens. A static security scan graded it A with 0 findings. It is 98% identical to use-bun-instead-of-node-vite-npm-pnpm, differing in 3 lines, and is treated as a copy.
Other cursor rules, from other repositories
page_layer_rules
Page layer rules for Next.js App Router pages and layouts.
vue-typescript-patterns
A set of coding rules for Vue 3 projects using TypeScript, a language that adds type checking to JavaScript. It covers component structure, file locations, TypeScript usage, and Pinia, a library for shared application state.
ai-agent-specialist
Cursor rules for TypeScript, React, Node.js, clean architecture, testing, and WHY-oriented engineering guidance.
astro-typescript-cursorrules-prompt-file
Cursor rules for Astro development with TypeScript integration.
angular-typescript-cursorrules-prompt-file
Cursor rules for Angular development with TypeScript integration.
nextjs-tailwind-typescript-apps-cursorrules-prompt
Cursor rules for Next.js development with Tailwind CSS and TypeScript integration.