The spending agreement your house already has.
Every household answers one question informally and never writes it down: who can spend what, alone, up to how much. We watch real decisions, write it for you, and tell you when the rule you think you have is not the rule you actually follow.
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The Wilson House
Six weeks, seeded and disclosed · 29 decisions · 7 rules
Setup asks one number
On purpose — so there is something for the first month to correct.
No wallet, no gas
Two keys in the whole system, and members join with a link.
What the house agreed on without saying a word
Four of the Wilson house's rules — every number here is live from The Agreement.
Friday Fast Food Ritual
$32.40 ± $10.695 of 6 weeks. Small enough that nobody ever asked.
Max's Gaming Budget
72% of allowanceOne rejection in six weeks — the only contested category.
Groceries Autonomous Ceiling
Up to $45.00 solo11 of 11 times agreed without discussion.
Silent Price Creep
$10.99 → $12.99Nobody approved it, nobody noticed — until Reality check.
How the house's rules get derived
Seven pure functions over your own decisions — reproducible, testable, and the same code every time, which is why the demo can run twice and say the same thing twice.
Observe
Every decision — who signed, how long it took, whether anyone was even asked — is written to Walrus as it resolves. No forms.
Derive
Seven pure functions read the evidence and propose a rule once it clears a confidence floor. Fewer events, no rule — the empty state says how many more are needed.
Flag drift
When behavior stops matching a ratified rule, or a charge never had an approval, Reality check says so — matched against what Tatum reads from the chain.
The six-week living sequence
collecting evidence
collecting evidence
the first rules form
the solo limit and the allowance pattern appear
a rule moves, so it is superseded
drift and unapproved spend
Inside the house, a week control at the bottom of every screen replays this — to see it.