Exportsgit add .!

package.json

@@ -47,6 +47,7 @@
     "format-message": "6.2.1",
     "htmlparser2": "3.10.0",
     "immutable": "3.8.2",
+    "json5": "^2.2.3",
     "scratch-parser": "github:Unsandboxed/scratch-parser#master",
     "scratch-sb1-converter": "0.2.7",
     "scratch-translate-extension-languages": "0.0.20191118205314",

src/engine/runtime.js

@@ -590,6 +590,7 @@ class Runtime extends EventEmitter {
          * Export some internal values for extensions.
          */
         this.exports = {
+            ExtendedJSON,
             i_will_not_ask_for_help_when_these_break: () => {
                 console.warn('You are using unsupported APIs. WHEN your code breaks, do not expect help.');
                 return ({

src/virtual-machine.js

@@ -232,6 +232,10 @@ class VirtualMachine extends EventEmitter {
             Sprite,
             RenderedTarget,
             JSZip,
+            Buffer,
+            Base64: Base64Util,
+            RESERVED_NAMES,
+            JSON5: require('json5'),
 
             i_will_not_ask_for_help_when_these_break: () => {
                 console.warn('You are using unsupported APIs. WHEN your code breaks, do not expect help.');