フォルダひとつがアプリだ — バンドルにコードはない

unmanned_store.mbd/
  manifest.json            誰であるか
  ui/app.json              ルート
  ui/pages/main.json       画面ひとつ
  ui/pages/restock.json    画面ふたつ

{
  "schemaVersion": "1.0.0",
  "manifest": {
    "id": "com.makemind.sample.unmanned_store",
    "name": "Unmanned Store",
    "type": "application",
    "entryPoint": "ui.app",
    "description": "What the owner of an unmanned store sees: stock, takings and what needs a visit. No code, only declarations.",
    "category": "business",
    "tags": ["retail", "unmanned", "sample"]
  }
}

{
  "type": "application",
  "title": "Unmanned Store",
  "initialRoute": "/",
  "routes": {
    "/": "ui://pages/main",
    "/restock": "ui://pages/restock"
  }
}

{
  "type": "button",
  "label": "What needs a visit",
  "variant": "elevated",
  "onTap": { "type": "navigation", "action": "push", "route": "/restock" }
},
{
  "type": "button",
  "label": "Refresh",
  "variant": "outlined",
  "onTap": { "type": "tool", "tool": "store.today", "params": {} }
}

void registerBundleUi(Server server, String bundleDir) {
  final manifest = _json('$bundleDir/manifest.json')['manifest'];

  void serve(String uri, String name, String description,
      Map<String, dynamic> Function() document) {
    server.addResource(
      uri: uri, name: name, description: description,
      mimeType: 'application/json',
      handler: (requestedUri, params) async => ReadResourceResult(contents: [
        ResourceContentInfo(uri: requestedUri,
            mimeType: 'application/json', text: jsonEncode(document())),
      ]),
    );
  }

  serve('ui://app', manifest['name'], 'The app: routes and theme',
      () => _json('$bundleDir/ui/app.json'));
  for (final f in Directory('$bundleDir/ui/pages').listSync().whereType<File>()) {
    if (!f.path.endsWith('.json')) continue;
    final name = f.uri.pathSegments.last.replaceAll('.json', '');
    serve('ui://pages/$name', name, 'Screen "$name"', () => _json(f.path));
  }
}

# If there is a build step this article's argument collapses, so start by
# checking there is nothing to build
BUILDISH=$(find unmanned_store.mbd -type f ! -name '*.json' | wc -l | tr -d ' ')
[ "$BUILDISH" -eq 0 ] || { echo "bundle contains non-json files"; exit 1; }

"initialState": { "low": [], "lowCount": 0, "notice": "" }

"onInit": { "type": "tool", "tool": "store.today", "params": {} }

ap.tap("What needs a visit")
ap.wait_text("bring")                 # photographed only once the list is on it
ap.shot("02_restock.png")
ap.tap("Order the lot")
ap.wait_text("Ordered 3 lines")
ap.expect_no_text("bring 13")         # the ordered line is gone, not just relabelled

after = (before
         .replace("Shelf · open 24 h", "Laundry · open 24 h")
         .replace("TAKINGS TODAY", "COIN BOX TODAY")
         .replace("{{lowCount}} lines at or below reorder",
                  "{{lowCount}} machines need a look"))

   edited ui/pages/main.json — 8921 B -> 8919 B, no compiler ran

// The bundle in the folder next door has no code. It declares screens and
// says which tool a button calls. The tools live here. That split is the
// argument of this article — the person who edits the screen and the
// person answerable for the stock are not the same person, and should not
// be editing the same file.

$ bash verify.sh
   [1/3] bundle is only json
   [2/3] store_server (dart analyze)
No issues found!
   [3/3] open in AppPlayer, walk it, capture
   edited ui/pages/main.json — 8921 B -> 8919 B, no compiler ran
store-bundle: 2 routes walked, reorder cleared the list, json edit took effect with no build

( cd store_server && dart pub get )
bash verify.sh        # bundle check + analyze + AppPlayer: two routes, the order, the edit

cat unmanned_store.mbd/ui/app.json
cat unmanned_store.mbd/ui/pages/main.json