diff --git a/extensions/src/common/extension/decorators/blocks.ts b/extensions/src/common/extension/decorators/blocks.ts
index b3b45c4e7..de473fa84 100644
--- a/extensions/src/common/extension/decorators/blocks.ts
+++ b/extensions/src/common/extension/decorators/blocks.ts
@@ -22,6 +22,7 @@ export const getAccessorPrefix = "__getter__";
 export const setAccessorPrefix = "__setter__";
 
 export const reporter = makeDecorator("reporter");
+export const command = makeDecorator("command");
 
 /**
  * This a decorator function that should be associated with methods of your Extension class, all in order to turn your class methods
diff --git a/extensions/src/common/extension/decorators/newBlocks.ts b/extensions/src/common/extension/decorators/newBlocks.ts
index fb725961d..75198a0c9 100644
--- a/extensions/src/common/extension/decorators/newBlocks.ts
+++ b/extensions/src/common/extension/decorators/newBlocks.ts
@@ -24,8 +24,10 @@ export function makeDecorator<T>(type: T): TemplateEngine<T>["execute"] {
 
     // function takes T and returns a function of TemplateEngine type
     // TemplateEngine returns based on the ScratchType of the block
-    return function(builderOrStrings, ...args) {
-        return function(target, context) {
+    return function decoratorFn<
+        const Return
+    >(builderOrStrings, ...args) {
+        return function (target, context) {
             // Defining block characteristics
             const opcode = target.name;
             const internalFuncName = getImplementationName(opcode);
@@ -74,7 +76,8 @@ export function makeDecorator<T>(type: T): TemplateEngine<T>["execute"] {
             }
 
             // Push the block
-            type Fn = (this: ExtensionInstance, value: any, util: BlockUtilityWithID) => void;
+            //type Fn = (this: This extends ExtensionInstance, value: any, util: BlockUtilityWithID) => void;
+            type Fn = (...args) => Return;
             const blockInfo = { type: blockType, text: textFunction, args: argList };
             context.addInitializer(function () { this.pushBlock(opcode, blockInfo as BlockMetadata<Fn>, target) });
             
diff --git a/extensions/src/simple_example/index.ts b/extensions/src/simple_example/index.ts
index 69a3f222a..cd265e518 100644
--- a/extensions/src/simple_example/index.ts
+++ b/extensions/src/simple_example/index.ts
@@ -1,4 +1,4 @@
-import { ArgumentType, BlockType, BlockUtilityWithID, Environment, ExtensionMenuDisplayDetails, Language, Menu, SaveDataHandler, block, buttonBlock, extension, tryCastToArgumentType, untilTimePassed, reporter } from "$common";
+import { ArgumentType, BlockType, BlockUtilityWithID, Environment, ExtensionMenuDisplayDetails, Language, Menu, SaveDataHandler, block, buttonBlock, extension, tryCastToArgumentType, untilTimePassed, reporter, command } from "$common";
 import jibo from "./jibo.png";
 import five from "./five.png";
 
@@ -70,11 +70,16 @@ export default class SimpleTypescript extends extension(details, "ui", "customSa
         return x + y;
     }
 
-    @reporter((instance, $) => $`Add ${{type: "number", defaultValue: 3}} to ${"number"}: number complex`)
+    @reporter((self, $) => $`Add ${{type: "number", defaultValue: 3}} to ${"number"}: number complex`)
     reporterWithCallbackNumber(x: number, y: number) {
         return x + y;
     }
 
+    @command`Hello ${{type: "string", defaultValue: "there"}}`
+    simpleCommand(text: string) {
+      console.log(text);
+    }
+
   @block({
     type: "command",
     args: [