The union kit
How a block does it
1Hang a door
Print a sheet of door hangers and put one on every door in the building. The QR on each one opens the same little book.
2Scan & turn
New people scan and get the building's book: where the group lives, what's shared, and what was agreed. It works with no connection - cells in an elevator count.
3Say hi
For the hello itself, two phones talk directly - a scan passes the greeting door to door. Real time, in the flesh, no platform watching.
When the words matter
After hello comes the fine print.
The back page of a union book is the few lines a building has shaken hands on. They start as a draft — a building is drafts. To give a page of them real teeth, a building moves the words through three honest steps:
A draft stays a draft until a building seals it. The seal proves the words match — the paper, the ink, and the witnesses prove who signed. The agreement desk
Presence — the postbox
The hello is real-time. When the neighbor on the late shift can't answer the door, leave a note: one tap opens your own mail app addressed to the building — no relay, no postbox on a company's computer.
Leave a note at the postboxNearby on this site
Why no app, no sign-up, no middleman
The union book is paper in the phone's language: a page on this site, so every door hanger points at the same shelf.
The hello is point to point. When two phones say hi, the greeting travels directly between them, encrypted, and no company sits in the middle reading it. The QR you exchange is the only "server" a hello needs; it just carries the opening words. Your phone does quietly ask a public address-guide (STUN) where its own front door is - that helper sees the door number, never the letters inside.
Two honest edges, on purpose: the hello lasts while you're both there - it doesn't record or wake up later; and under a rare strict Wi-Fi, a direct hello can fail, and it fails honestly rather than secretly detouring through anyone else's computer.