Chapter 2: Meet JetLeaf — Your First Application

Let's install JetLeaf and run our first application. In 18 minutes, you'll go from an empty project to a running Dart backend with a startup banner, environment detection, and 12 pods wired automatically. We break down what `JetApplication.run()` actually does under the hood — scanning, dependency graph construction, context refresh — and I'm honest about the startup delay and why it exists. Plus: Behind the Framework — reading the banner source code.