v0.8.0.15 — the reference documents, and a card that advertised what it cannot do

The four hand-written references brought up to the game as it actually runs,
ahead of the next testing round, plus a Quickstart to hand a tester who has never
played. They had not been touched since v0.6.2 — a month and two minor versions —
and each now says at the top which build it describes.

ONE LIVE BUG CAME OUT OF THE PASS. mainlineDescription told players "Cars may be
sorted into any new order here" on the Interchange. It is the printed capability
and has never been implemented: nothing reads sortsCars to permit a sort, and its
one live use is marking the card an Extra may be made up on, because it is the
Mainline card with a yard. That sentence is not only documentation — view.ts
renders it as a Mainline card's `what`, so it is what a player reads on the
board, and the generated reference printed a "Sorts cars: yes" column beside it.
A card advertising a button that does not exist sends a player hunting for it and
then concluding the game is broken.

What the documents had wrong, all of it verified against the code rather than
read for tone: the victory model in the Rules book (firstToTarget /
highestAfterDays and the target-bearing length presets stopped existing in
2026-08 — it is a free days count and a combined floor of 3 x players x days);
"there is no lobby, no server, no multiplayer"; crossing time in mph rather than
regions; Extras launched automatically eastbound; the Uncontrolled Siding listed
as a passing card; industry track length taken from the box count; and a
"Sister Trains" optional rule that never existed. The Home deck's counts table
came out under TODO #15a — Jesse's own ruling that counts move with balance —
and it had been wrong for a month, which is the argument made twice.

The Home and Mainline deck references are restructured to explain how a deck is
USED and to defer every per-card table to rules/as-built.md. Duplicating it by
hand is precisely the drift #15a was raised about: as-built needed no correction
beyond the Interchange, because build:cards regenerates it and a test fails when
the checked-in file disagrees. Everything hand-maintained around it had drifted;
it had not.

docs/design.md, the index everything starts from, said v0.4.3, "what is not: the
server", and 493 tests. It now also lists the player-facing references, which it
never has, so the Quickstart is findable at all.

999 fast tests and 35 sim tests pass.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01DmdqqCNoiqE7GBo6wthBnR

scripts/build-card-reference.ts

@@ -126,7 +126,7 @@ w('card prints are what it costs to cross. Where a train *enters* is what the ru
 w('train on Hilly, a Heavy Grade with Helpers, or a card whose back region is a siding rather than');
 w('part of the road all change the entry point rather than the card\'s length.');
 w();
-w('| Card | Regions | Default entry | Fast / slow entry | Trains may pass | Sorts cars |');
+w('| Card | Regions | Default entry | Fast / slow entry | Trains may pass | Extra may start |');
 w('| --- | ---: | ---: | --- | :---: | :---: |');
 for (const m of MAINLINE_PROFILES) {
   const ss = m.speedStarts ? `${m.speedStarts.fast} / ${m.speedStarts.slow}` : '—';