The Keywright

Five dice decide the anatomy of one key. The anatomy decides the door. There are 7,776 doors, all of them real in the way that a thing you have not checked is real. Nobody gets to choose which one you get.

Rolled with superandom · Why the weather didn't make the cut · The serious demo

The cast

cast 0

or press Space

Registry entry

unfiled

The ledger is waiting.
No key has been cast.
The door, presumably, is fine.

no key yet
the blank is on the bench

The ledger

0 distinct of 7,776

empty

Entropy bench

cold

The dice are not rolled by Math.random(). Every face comes from superandom.randomInt(1, 7), drawn from a pool your own hand fills and then XOR-folded with a fresh crypto.getRandomValues() mask. Move the mouse and watch the estimate climb.

0 of 256 credited bits

Source	Events	Credited

Waiting for the library.

What this is

A toy on top of a real library. Each cast takes five draws, and each die is a rejection-sampled randomInt rather than a % 6, because the modulo shortcut is biased whenever the range doesn't divide the source's cardinality. Over 7,776 outcomes that bias would be entirely invisible to you and entirely present in the ledger, which is the whole reason the library does it properly.

The entropy your hand contributes does not make the dice fairer. It cannot: the output is already platform-grade from the first millisecond. What it buys is an independent source and a receipt saying where the numbers came from. That argument is written up here, and the library is on GitHub.