javascript-coding

A set of JavaScript coding rules and patterns for modern modules, asynchronous code, errors, caching, API calls, and method names.

In plain words
What is it for?
Use it when writing or reviewing JavaScript that imports modules, calls APIs, handles failures, caches results, or names utility methods.
Why use it?
It gives developers consistent approaches to common JavaScript tasks and helps avoid unclear error handling, stale cache use, and uncontrolled API requests.

Cursor rule for Cursor

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/hhx465453939/mcp-pubmed-server/javascript-coding
Clone the repo
git clone --depth 1 https://github.com/hhx465453939/mcp-pubmed-server

Made for: Cursor.

Per session 0 Nothing until a file matches its globs; then the whole rule loads.
When invoked 525 The whole file, excluding the scripts and references it only reads on demand.
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 $0.00000 $0.00525
Opus 5 $0.00000 $0.00262
Sonnet 5 $0.00000 $0.00105
Haiku 4.5 $0.00000 $0.00052

Measured yesterday against content hash 3bb862d8f0a7, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

javascript-coding 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.

.cursor/rules/javascript-coding.mdc · 76 lines

What it actually says

JavaScript编码规范

代码风格

  • 使用 ES6+ 模块语法 (import/export)
  • 使用 async/await 而非 Promise.then()
  • 使用 const/let 而非 var
  • 使用 模板字符串 而非字符串拼接

错误处理模式

// 标准错误处理模式
try {
    const result = await someAsyncOperation();
    return { success: true, data: result };
} catch (error) {
    console.error(`[Module] Error:`, error.message);
    throw new Error(`Operation failed: ${error.message}`);
}

缓存管理模式

// 缓存键生成
getCacheKey(query, maxResults, daysBack, sortBy) {
    return `${query}|${maxResults}|${daysBack}|${sortBy}`;
}

// 缓存检查
getFromCache(key) {
    const cached = this.cache.get(key);
    if (cached && Date.now() - cached.timestamp < this.cacheTimeout) {
        return cached.data;
    }
    return null;
}

API调用模式

// 速率限制
async enforceRateLimit() {
    const now = Date.now();
    const timeSinceLastRequest = now - this.lastRequestTime;
    if (timeSinceLastRequest < RATE_LIMIT_DELAY) {
        await new Promise(resolve => setTimeout(resolve, RATE_LIMIT_DELAY - timeSinceLastRequest));
    }
    this.lastRequestTime = Date.now();
}

工具方法命名

  • handle* - 处理工具调用
  • fetch* - 获取外部数据
  • format* - 格式化输出
  • extract* - 提取信息
  • clean* - 清理操作

日志规范

// 使用 console.error 输出调试信息(MCP服务器特性)
console.error(`[Module] Operation: ${operation} (${param})`);
console.error(`[Cache] Hit for key: ${key.substring(0, 50)}...`);

环境变量使用

// 环境变量访问模式
const API_KEY = process.env.PUBMED_API_KEY;
const EMAIL = process.env.PUBMED_EMAIL || '[email protected]';
const ABSTRACT_MODE = (process.env.ABSTRACT_MODE || 'quick').toLowerCase();
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 · 76 lines · 525 tokens per session scan A 3bb862d8f0a7

Subscribe to this mod's changes

javascript-coding is a cursor rule published in the GitHub repository hhx465453939/mcp-pubmed-server (6 stars, last pushed 6mo ago), licensed Apache-2.0. It costs nothing until one of its globs matches a file; then it loads 525 tokens. 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 2026-08-31.