Hearth Keys

Hearth Keys is the unglamorous architecture behind every Sycamore product: where secrets live, how long a session is allowed to last, what happens when a tab goes quiet.

T. Colon’s line still sits on the studio wall: a receipt is not a confession. The hearth is the device. If the key has to travel to our servers to be useful, we designed the product wrong.

Session sealing, idle bounds, and the refusal to keep a second copy of a person’s day — this work is why Arcanus can say the operator of the site cannot open the letter or the call.