diff --git a/utils/engine.js b/utils/engine.js
index 5be6159..8e9410b 100644
--- a/utils/engine.js
+++ b/utils/engine.js
@@ -162,12 +162,15 @@ export class UTXOEngine {
     await emptyDir(outputSchemaDir);
     console.log(`UTXO: writing schema (v${schemaVersion}) ..`);
 
+    const schemaBundle = []
     for (const schema of schemas) {
       await this._jsonWrite(
         [outputSchemaDir, schema.name + ".json"],
         schema.schema,
       );
+      schemaBundle.push(schema.schema);
     }
+    await this._jsonWrite([ outputSchemaDir, 'bundle.json' ])
 
     // write global index
     await this._jsonWrite([outputDir, "index.json"], entriesIndex);