The laminated card

In a church basement filing cabinet somewhere near you there is a phone tree from 1994: a laminated pyramid of names, Doris at the top, each person sworn to call three more. It worked, in its day, because everyone had a landline, everyone was home by six, and Doris was a force of nature.

You are not going to rebuild that, and you don't need to. The modern phone tree is already in your pocket — it's a group thread. Yours may even exist, dormant, named something like "Maple St 🌳" and last active during a package theft two years ago. The technology was never the missing piece. What's missing is three agreements, and they take one porch conversation to make.

Agreement one: who starts it

An unowned thread is a rumor mill with a send button. When the wind is up and the lights flicker, somebody posts "is everyone seeing this??" and thirty messages of speculation follow, signal drowning in vibes. The fix costs nothing: name a starter and one backup — say, you and the house across the street. This is not a hierarchy; it's a tiebreaker. Anyone can post anything, anytime. The starters own exactly one act: saying the words "this is a check-in" when something real is happening, so the street never wastes its first hour wondering whether this counts.

Agreement two: what "check in" means

Decide, in the boring calm of a Tuesday, what a check-in reply contains — so that nobody has to compose prose in a dark hallway. Our suggestion, small enough to type with one thumb: status plus one fact. "OK — we have power." "OK — tree down across our driveway." "Need help — water coming into the basement." A thumbs-up on the check-in message is a valid, complete answer meaning "OK, nothing to report." The bar must be low enough to clear while holding a flashlight in your teeth.

The second half of this agreement is what happens to silence: any house that hasn't answered within the hour gets a knock. Not a scolding — a knock. Which brings us to the part most streets never write down.

The degrade path

The thread lives on cell towers, and in a real outage cell towers live on backup batteries rated in hours, not days. A phone tree that hasn't planned its own failure isn't infrastructure; it's a mood. So the third thing to agree on is what comes next, each layer assuming the death of the one above it:

1. The thread. Rich, fast, everyone's already there. First choice, first casualty.
2. Plain SMS. Text messages often squeeze through congestion that chokes data flat. Everyone saves the starters' numbers as actual contacts — not just faces in an app that needs a login and a network.
3. Radio. A pair of FRS walkie-talkies per anchor house — the Neighborhood Mesh Walkie Set is built for precisely this rung — with a channel agreed in advance and a schedule: radios on at the top of each hour for five minutes, to make batteries last for days. Listening has a rung here too: a battery-or-crank NOAA receiver like the Soft-Glow Emergency Radio is the street's inbound channel when the grid's outbound is gone.
4. Knocking. The protocol of last resort, and the only one in this list with a hundred-percent historical uptime. Starters walk the street; doors answer. Every layer above exists to make this one rarely necessary — never to replace it.

Write the whole path on an index card: thread, then SMS, then channel 3 at the top of the hour, then knuckles. Tape it inside the kitchen cabinet, next to the street map if you've made one.

The once-a-season test

Here is the part that turns a plan into a ritual, and it costs two minutes a quarter. Four times a year, a starter posts: "Quarterly test — reply like it's real." That's the whole ceremony. What it surfaces is everything a plan quietly loses between emergencies: the number that changed, the family that moved in March, the neighbor who muted the thread eighteen months ago, the walkie-talkie whose batteries died in the drawer. Each test is a tiny, cheap failure-finder, and finding a failure on a sunny Saturday is a chore; finding it at 2am is a plot.

Tie the test to time the calendar already keeps — solstices and equinoxes work beautifully, and they rhyme with the 90-day walk-around, which does for your street's declared gear what this test does for its wiring. Once a season, ninety seconds per household. Streets that do this move through the first hour of a real event on rails they've already ridden four times that year.

Declare it, then start it

On your street page, "street phone tree / group chat you tend" sits in the who-has-what inventory alongside the generators and the first-aid kits, and it belongs there: a tended thread is capability held in readiness, exactly the way a generator is, and exactly as useless if nobody maintains it. Declaring it makes it part of your constellation — a governance practice your neighbors can see and count on.

So, tonight: open the thread if it exists, start it if it doesn't — three houses is plenty of quorum — and propose the three agreements in a single message. Who starts it. Status plus one fact. Test every season, degrade path on a card. Doris would recognize every part of it except the phone.