nodejs

Graceful shutdown in Node.js 24 requires tracking active connections using AsyncLocalStorage and closing the HTTP server before exiting to ensure no requests are dropped during a SIGTERM signal. This skill provides templates for deterministic shutdown plans that prevent data loss and avoid deadman timer crashes during deployments.

Debugging memory leaks and event loop stalls in a Node.js backend involves analyzing heap dumps to find retained objects and using clinic to profile asynchronous operations. This skill guides you through isolating worker_threads or Piscina OOM patterns and diagnosing silent failures.

Securing an Express 5 backend in production requires applying Helmet, strict CORS, and rate limiting, alongside using argon2id for password hashing and secure comparisons. This skill enforces critical constraints like preventing secrets logging and implementing safe error handling by default.

Type-stripping in Node.js 24 works natively with ESM-first module systems, allowing you to run TypeScript files directly without a separate compilation step. This skill outlines the operational defaults and ESM/CJS interop guardrails needed for production reliability.

Integrating OpenTelemetry and Pino for observability in Fastify or Hono involves configuring Pino for structured logging with redaction and wiring OpenTelemetry traces across async primitives. This skill provides reference files to implement consistent observability across Node.js frameworks.

Use worker_threads or Piscina for CPU-intensive tasks within an event loop, and PM2 cluster for scaling across multiple CPU cores horizontally. This skill helps route your architecture based on framework constraints and reliability issues like crash loops.