The doors
By light — the stream
One screen plays a moving code, the other reads it back. No signal needed, nothing stored but the words.
The pass — one bundle, every door
Paste what you're carrying — a jar card, a leaf, a signed page — and pick the rung that fits: paper, light, or a paste by hand.
Straight across the net
The live hello — encrypted, phone to phone, the scan as your doorway. The union's say-hi.
By sound — planned
The sound handshake is on its way — bytes through the air when the camera's blocked and the net's away.
How the doors hold
The rule of the hand. Every door is opened by a person — a screen held up, a code scanned, a paste passed phone to phone. No door calls out by itself, and none reroutes through a company's room. If a door won't open, it says so, and the next one is usually within reach.
Each fits a moment. Light carries a few sentences, steadily, anywhere.
Sound will carry a few bytes around corners. The net carries a live conversation, end to
end. The design record lives at communityservices.cc/COMMS.md.