Hidden Door, a new platform that’s now in early access, also lets you cowrite a choose-your-own-adventure-style story with AI. Hidden Door is designed to let you play in worlds that include the public domain settings of the Wizard of Oz and Pride and Prejudice as well as The Crow, which Hidden Door has licensed. Where Hidden Door differs from a general-purpose chatbot is that it will create in-universe limits on what you write. Still, a focus on familiar narrative worlds could make Hidden Door a compelling way for some people to interact with an AI storyteller. Hidden Door says, “Most authors we work with are deeply involved in the creation process.”The best thing that I can say about Hidden Door?