Node.js Patterns

Purpose

Implement production-grade Node.js patterns — streams with backpressure, typed event emitters, worker threads for CPU-bound work, DI containers, error classification, and async flow control.

Agent Protocol

Trigger

User request includes: Node.js stream, Node.js event emitter, Node.js worker thread, Node.js DI, Node.js error pattern, Node.js async, Node.js backpressure, Node.js event loop.

Input Context

• Node.js version (18+, 20+, 22+)
• Pattern needed (Streams, Workers, DI, Events, Errors)
• Runtime constraints (memory, CPU, concurrency)

Output Artifact

Code examples for the requested pattern. Compress output — no preamble, no postamble.