Node.js Express

Purpose

Structure Express.js applications with clean middleware pipeline, error handling, route separation, and validation.

Agent Protocol

Trigger

User request includes: express, express.js, middleware, router, next.js error handling, express app, express setup, express routing, express validation.

Input Context

• App scope (REST API, GraphQL BFF, SSR)
• TypeScript or JavaScript
• Database (Prisma, Mongoose, raw)
• Auth strategy (JWT, session, OAuth)

Output Artifact

Project structure, middleware order, route layout, error handler, validation setup.