You'd reach for this when you're juggling multiple Node.js processes during local development and want Claude to help manage them. Instead of manually running npm start in different terminals for your Express backend, React frontend, and local Postgres instance, this lets Claude orchestrate starting, stopping, and monitoring those servers for you. The specifics of which operations it exposes aren't detailed in the source, but the core idea is clear: it's about consolidating your local development environment control so you can ask Claude to spin up your full stack or restart specific services without leaving the conversation.