Tesseract Brain.
The building's own server. One device, installed in the building it serves, that runs Tesseract Home entirely on site: the app, the records, the twin, and the language model. And at the front desk, its public face: an AI reception that greets the building's people.
Buildings rent their brains. This one owns it.
Most building software lives in someone else's cloud. Brain inverts that: the entire Tesseract Home stack runs on hardware that belongs to the building, inside the building.
Tesseract Home itself is hosted on the device. Residents, staff, and management use the building's own server, not a distant one.
The digital twin and every record it grounds against live on site. The building's memory is physically the building's property.
A language model runs locally on the device, answering over context that identity and retrieval have already scoped. Cloud inference stays explicit, optional, and logged.
Brain's front-of-house face welcomes visitors at the lobby and answers over the building's shared knowledge, with every exchange captured for review.
A reception that never steps away.
The lobby is where a building meets its people, so it is where Brain shows its face. The AI reception greets visitors, answers questions over the building's shared, common knowledge, and hands off anything personal to the identity-gated app.
What Reception says is never a black box: exchanges are captured, auditable, and visible to the building's operators.
Privacy you can point at.
In Tesseract Home, privacy is not a policy paragraph. It is a wall. Brain is the reason the wall can be physical: when intelligence lives inside, data has no reason to leave.