Secret Sauce
A hot-dog vendor with a secret ingredient. A hotel clerk who knows where the famous author eats tonight. Talk them into telling you.
The Curiosity
Everyone was trying to trick language models with clever prompts. Strip away the engineering and it is a social game: someone has a reason to keep quiet, and you have only words.
What does that feel like when the other side is a character rather than a chatbot?
VideoCan AI keep a secret? Evaluating LLM for RPG use caseThe Build
Two scenes, each a system prompt with a secret and a reason to protect it. The vendor's hot dogs are made of horse meat, which is legal where he is and very bad for business if known. The front-desk clerk knows a famous guest's dinner plans and has been asked, pointedly, to forget them.
The game watches every reply for the secret and highlights the bubble that gives it away. Sessions and chat history live in Firestore; a trigger hands each message to the model on Cloud Run, so there is no game server to keep alive.
The Result
Two scenes. Both are beatable.
What We Learned
Whether a model can keep a secret is still an open question. A small game turned out to be the cheapest way to keep asking it, and to watch how people ask.