express
Provides comprehensive guidance for Express.js framework including routing, middleware, request handling, error handling, and API development. Use when the user asks about Express, needs to create HTTP servers, set up routes, implement middleware, or build REST APIs.
- Installs
- 104
- Last 24h
- —
- Trending rank
- —
- Security
- Not audited
Install
Works with every agent the skills CLI supports.
npx skills add https://github.com/partme-ai/full-stack-skills --skill express- 01
Install
Run the command in your project. The CLI asks which agents to install for.
- 02
Describe the task
Ask your agent for something this skill covers. It loads express automatically when relevant.
- 03
Review the result
The agent follows the SKILL.md steps, scripts and references bundled with the skill.
SKILL.md
The instructions your agent reads when the skill is triggered.
When to use this skill
Use this skill whenever the user wants to:
- Build Node.js HTTP servers with Express routing and middleware
- Configure CORS, body parsing, error handling, and static files
- Create REST APIs with request validation and response formatting
- Set up production-ready Express applications with security headers
How to use this skill
Workflow
- Create app — instantiate Express and configure middleware
- Define routes — set up route handlers for each endpoint
- Add error handling — implement error middleware for consistent responses
- Deploy — run behind a reverse proxy with HTTPS
Quick Start Example
const express = require('express');
const cors = require('cors');
const helmet = require('helmet');
const app = express();
// Middleware
app.use(helmet());
app.use(cors());
app.use(express.json());
// Routes
app.get('/api/items', async (req, res, next) => {
try {
const items = await Item.findAll();
res.json({ items });
} catch (err) {
next(err);
}
});
app.post('/api/items', async (req, res, next) => {
try {
const { name, price } = req.body;
const item = await Item.create({ name, price });
res.status(201).json(item);
} catch (err) {
next(err);
}
});
// 404 handler
app.use((req, res) => {
res.status(404).json({ error: 'Not found' });
});
// Error middleware (must have 4 params)
app.use((err, req, res, next) => {
console.error(err.stack);
res.status(err.status || 500).json({
error: err.message || 'Internal server error',
});
});
app.listen(3000, () => console.log('Server running on port 3000'));
Async Error Wrapper
// Wrap async handlers to catch rejected promises
const asyncHandler = (fn) => (req, res, next) =>
Promise.resolve(fn(req, res, next)).catch(next);
app.get('/api/users', asyncHandler(async (req, res) => {
const users = await User.findAll();
res.json(users);
}));
Router Example
// routes/items.js
const router = require('express').Router();
router.get('/', asyncHandler(async (req, res) => { /* ... */ }));
router.post('/', asyncHandler(async (req, res) => { /* ... */ }));
router.get('/:id', asyncHandler(async (req, res) => { /* ... */ }));
module.exports = router;
// app.js
app.use('/api/items', require('./routes/items'));
Best Practices
- Separate routes and middleware into modules; use
express.Router()for organization - Always wrap async handlers with try/catch or a wrapper to avoid unhandled rejections
- Use
helmetfor security headers and configure CORS for production origins - Deploy behind a reverse proxy (nginx) with HTTPS in production
- Use
morganfor request logging and structured error responses
Reference
- Official documentation: https://expressjs.com/
Keywords
express, Node.js, middleware, routing, REST API, error handling, async, helmet, cors
FAQ
What does the express skill do?
Provides comprehensive guidance for Express.js framework including routing, middleware, request handling, error handling, and API development. Use when the user asks about Express, needs to create HTTP servers, set up routes, implement middleware, or build REST APIs.
How do I install express?
Run npx skills add https://github.com/partme-ai/full-stack-skills --skill express in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/express/ (personal) or .claude/skills/express/ (project).
Which AI agents can use express?
Any agent that supports the open Agent Skills format (a folder with a SKILL.md file), including Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, Windsurf, Cline, OpenCode and more.
Is express safe to install?
No partner security audit is available yet. Skills can run commands and scripts, so read the SKILL.md and any bundled files before installing.
Who maintains express?
It is published by partme-ai in partme-ai/full-stack-skills. It has 104 recorded installs.
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