Kid + Teacher · Quilt Docs

Chapter 1: What is a cell?

A cell is like a Lego block — but smarter. Each Lego block has a job: a 2x1 brick connects things. A wheel rolls. A roof sits on top.

Cells in Quilt have 11 jobs:

Job	What it does	Like a Pokemon move
BIND	Makes a new cell	Splash (creates water)
LINK	Connects two cells	Vine Whip
EFFECT	Changes a cell's state	Thunderbolt
VIEW	Looks at a cell	Scan
TICK	Advances time by one	Time Walk
FORGET	Removes a cell	Self-destruct
PROOF	Verifies a cell	Guard
ROUTE	Sends a cell to another	Teleport
CRDT	Merges two cells	Fusion
WORLD	Places a cell on a map	Fly
TIME	Schedules a cell	Future Sight

Most Lego blocks have ONE move. A Quilt cell can use any of the 11, depending on what it needs to do.

Imagine a school. The clock on the wall does TICK every minute. The bell does EFFECT (changes whether class is in session). The classroom door does VIEW (who's outside?). The principal does PROOF (is this student really enrolled?). Each one is a cell.

Chapter 2: The Sorting Hat

In the Harry Potter books, first-years put on the Sorting Hat and it tells them which House they belong to. The Hat is magical — it knows things about you.

JEV is a Sorting Hat for AI. It doesn't write poems or draw pictures. It just decides things. You give it a kid and a question, and it says "85% Gryffindor, 12% Ravenclaw, 3% Hufflepuff, 0% Slytherin."

JEV never makes up an answer outside the Houses you gave it. If you only gave it 4 Houses, it cannot say "5th house." That's what makes it the Sorting Hat and not a regular wizard.

Now, in real AI there are three workers:

JEPA is your gut feeling. Fast. Doesn't think. Just knows.
LLM is the human teacher. Slow, careful, can explain in words.
JEV is the Sorting Hat. Quick, principled, gives you a number.

When all three agree, you're sorted. When they disagree, the school debates which is right.

Ask your parent or teacher to debate which house YOU belong to. Then ask: which one of you is the JEPA (gut), which is the LLM (teacher), which is the JEV (sorting hat)? Was there a disagreement?

Chapter 3: Lightning and Thunder

You see lightning. You count: one-Mississippi, two-Mississippi, three-Mississippi. Then you hear thunder. The bigger the gap, the farther away the storm.

Lightning is the direction. You see WHERE the storm is.
The wait is the time delay. Lightning and thunder happen at the same time, but light is faster than sound.
Thunder is the distance. Sound takes about 5 seconds to travel a mile.

JEPA, JEV, and LLM work the same way:

JEPA is lightning. One forward pass through the world model. Tells you the direction.
JEV is thunder. It comes a moment later. Tells you the distance with calibrated confidence.
LLM is the report. The news anchor telling you what just happened.

Without JEPA, JEV is rigid — it knows distance but not direction. Without JEV, JEPA is hallucination — it knows direction but not distance. Without LLM, nobody can tell anyone else what happened.

Next time you see lightning, count the seconds until thunder. Divide by 5. That's how many miles away the storm is. That's what JEV does for AI: it counts the gap and gives you a calibrated answer.

Chapter 4: Build your own Sorting Hat

Get a parent to help you with this. You'll need:

A computer with internet
A free account at replit.com
An API key from typesafe.ai (parent signs up)

Open Replit and make a new Python file. Paste this:

import os, requests

def jev_sort(name, hobby):
    r = requests.post(
        "https://api.typesafe.ai/v1/systemone",
        headers={"Authorization": f"Bearer {os.environ['TYPESAFEAI_KEY']}"},
        json={
            "model": "jev-latest",
            "state": f"{name} likes {hobby}",
            "questions": {
                "house": {
                    "type": "choice",
                    "question": "Which Hogwarts house?",
                    "criteria": {"Gryffindor":"brave","Ravenclaw":"clever","Hufflepuff":"kind","Slytherin":"ambitious"},
                    "options": ["Gryffindor","Ravenclaw","Hufflepuff","Slytherin"]
                }
            }
        }
    )
    return r.json()["answers"]["house"]["choice"]

print(jev_sort("Alice","rock climbing"))
print(jev_sort("Bob","reading books"))
print(jev_sort("Carmen","helping grandma"))

Set your key: in the Replit "Secrets" tab, add TYPESAFEAI_KEY with the value from typesafe.ai.

Click Run. Watch the Sorting Hat do its work.

Try different hobbies. Try sports, music, video games, math, art. Try weird ones: "collecting bottle caps", "arguing with siblings", "sleeping". Which houses does JEV sort into? Did it ever surprise you?