How to save Order Status Message in Craft Commerce using frontend form It's easy enough update the order status from the frontend using:

&lt;input type="hidden" name="action" value="commerce/orders/updateStatus"&gt;
&lt;input type="hidden" name="orderId" value="{{ order.id }}"&gt;
&lt;input type="hidden" name="orderStatusId" value="{{ order.orderStatus.id }}"&gt;


But I'm wanting to add a message to go with the status. Any pointers? It looks like the message is part of the Order History model, not the Order Status model.
Updating an order from the front end would not be possible unless the user has update/manage order permissions. 

As for the message it is simply a message post param that you send along with the status ID.