{
  "title": "Struktur-Demo",
  "chapters": [
    { "title": "Einleitung", "file": "01-intro.md", "id": "intro" },
    { "title": "Installation", "file": "02-install.md", "id": "install" },
    { 
      "title": "Fortgeschritten", 
      "children": [
        { "title": "Performance", "file": "adv/performance.md", "id": "perf" }
      ]
    }
  ]
}