Yeah that wouldn't be great. But: This feels to me like it might be a really useful tool to do systems-integration work around an app that is built in Node.js

Yeah that wouldn't be great. But: This feels to me like it might be a really useful tool to do systems-integration work around an app that is built in Node.js. For example, to integrate with incrond or cron, or get a supervisor task into JS. The smallest sensible "shell-ish" wrapper that gets you access to your codebase in JS and stops the coding effort being divided so much between technologies.