Individual skill
nodejs-pro
Production-grade Node.js guidance — event loop, modules, tooling, debugging, and deployment best practices.
skills/nodejs-pro/SKILL.md
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## Overview
Node.js is a server-side JavaScript runtime built on the V8 engine. Its non-blocking, single-threaded event loop makes it strong for I/O-heavy workloads — APIs, proxies, realtime services, and CLIs. This skill covers how to write, debug, and ship Node.js applications that behave well under load, with attention to the sharp edges (module systems, versioning, native addons, memory) that cause real production incidents.
## When to use
- Building an API, backend service, CLI, or realtime app on Node.js.
- Debugging event-loop lag, memory leaks, or unexplained latency.
- Choosing between ESM and CommonJS, npm/pnpm/yarn, or version managers.
- Preparing a Node service for production (logging, signals, health checks).
- Migrating an older Node codebase or upgrading major versions.
- Diagnosing high memory usage or garbage-collection pauses in a running service.
- Deciding how to scale a Node service (clustering, workers, or horizontal replicas).
