builtin completion

Author: daviidy

app/main.js

@@ -194,8 +194,12 @@ class Shell {
 
       const { command, args } = await this.parseCommand(input);
 
-      const result = await command.execute(args);
-      shouldContinue = result.shouldContinue;
+      if (command) {
+        const result = await command.execute(args);
+        shouldContinue = result.shouldContinue;
+      } else {
+        shouldContinue = true;
+      }
     }
   }
 }