Versions

Every published score names the rules that produced it. This is the archive those names point at.

A weekly snapshot pins four things — the contract a prediction was written against, the case registry it answered, the reference pool it was scored on, and the scoring metric that turned the answer into a number. Each pin on a leaderboard row is a link, and each link lands here.

Not current documentation — those rules, as of that week. If the bands move in November, a score published in September still points at the September bands, because the September score was never computed against anything else.

Two rules that make this worth reading

A version page is written once and never edited. If something on one of these pages is wrong, the correction is a new version and a changelog entry naming what it replaced. Editing a version page in place would make the archive worthless: a reader could no longer tell whether the page describes the rules that ran or the rules someone later wished had run.

A version is retired, never deleted. A pin from a snapshot published two seasons ago has to still resolve. Nothing here is removed once it has scored a week.

What is frozen, and what is not

The facts on each version page are generated from the artifact that version is — how many cases the registry holds, which seasons a pool was cut from, how many band grids it carries. They are not prose someone maintains alongside the artifact, because that copy would drift and a version page that misdescribes its own version defeats the purpose.

One thing on each page is live: which published runs used it. That changes every week, so it is fetched when you open the page and says so plainly when it cannot be loaded, rather than showing a figure that was true at deploy time.

The archive

Reading a pin

The four pins under a leaderboard row answer four different questions.

A fifth, the entity crosswalk, is not pinned on the board but is listed here: it is how a transfer resolves to the player whose appearances are measured, and a reader auditing a score eventually reaches it.