First pass done but untested

src/Models/HarmonyDevice.ts

@@ -30,6 +30,10 @@ export class HarmonyDevice {
         return this._on;
     }
 
+    public get commands(): { [name: string]: ICommand } {
+        return this._commands;
+    }
+
     //Define device methods
     public supportsCommand(commandName: string): boolean {
         let command = this._commands[commandName];