Update src/extension-support/extension-manager.js

src/extension-support/extension-manager.js

@@ -26,6 +26,7 @@ async function sha256(source) {
 // TODO: change extension spec so that library info, including extension ID, can be collected through static methods
 
 const defaultBuiltinExtensions = {
+    hypercomplexNumbers: () => require('../extensions/hypercomplex-numbers'),
     ml2scratch: () => require('../extensions/scratch3_ml2scratch'),
     facemesh2scratch: () => require("../extensions/scratch3_facemesh2scratch"),
     handpose2scratch: () => require("../extensions/scratch3_handpose2scratch"),