nodejs

Node.js backend runtime and process-lifecycle rules that Claude reliably gets wrong. Use when writing a Node server or long-running script, an Express app, worker threads, or process signal handling, and when choosing packages. Covers correct graceful shutdown, crash-on-fault instead of swallowing errors, not blocking the event loop, loading instrumentation first, securing the session cookie, and replacing deprecated packages with built-ins. Defers MongoDB to mongodb-rules, schema/validation to schema-source-of-truth, and image/deploy to docker and docker-swarm.