Use only the deepseek provider, you can configure openrouter to do that(but they create some obstacles, go to configurations and allow all providers)
Right now i'm testing deepseek harness, don't wait to test it. The plugin architecture and self awareness of workflows really make you think about "what is a tool vs what is a project".
It has been an amazing experience
Back when i was working with prototypes(10 years ago) i used axure. It is a great tool, but nowadays is very expensive. Which open source alternatives are being used? Do they publish a full html interactive prototype?