Mailroom notes
Short, honest write-ups of the machinery behind the counter — no fog, no marketing weather.
The guest-wifi gotcha: client isolation, explained
Full bars, happy browsing, and two devices that cannot reach each other — the number-one transfer killer, diagnosed in a minute, with three ways past it.
6 July 2026
What rides inside the QR label: a handshake, unpacked
The ~150-byte connection ticket, field by field: the doorman's passphrase, the wax seal, the sockets to knock on — and the salt that keeps codes scannable.
2 July 2026
Why AirDrop stops at the Apple fence — and browsers don't
The native sharing tools are walled gardens on purpose. One layer up, in the browser, the wall was never built.
24 June 2026
How two browsers meet with no server in the middle
Everyone's peer-to-peer transfer still starts with a server-made introduction. Ours starts with a camera — which is why it works with the internet unplugged.
15 June 2026