The Room Is Not Empty: a horror chatbot that runs entirely on your device

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A Hacktoberfest Open-Source AI Challenge entry called The Room Is Not Empty is a chat window that grows more unsettling the longer a user talks to it. Its behavior follows six stages, from echoing the user's words slightly wrong to reading the device's time and battery level and eventually locking the chat. The replies are generated by Llama 3.2 1B running in the browser via WebGPU, with pre-written scripted lines as a fallback on devices that cannot run the model. The project is a single index.html file with no backend, and nothing typed is sent to a server, so it works offline once the roughly 700 MB model is downloaded. The creator acknowledges tradeoffs, including the large download and the scripted fallback on phones without WebGPU.

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