v0.8.1.0 — the car comes back empty, and the lobby lets you leave

A second-digit bump, deliberately. 0.8.1 had been reserved for the seatless
display table; that work is getting more thought, and this table pass over
v0.8.0.17 earned the number on its own. Six reports: one was a rules question,
one a wording complaint with a real bug underneath, four straightforward.

A CAR CLEARED FROM A RED INBOUND BOX CAME BACK STILL LOADED. Reported as
wording — "technically accurate but doesn't make any sense" — and the wording
was the visible half. `inboundCleared` pushed `pooled(e.stock)` under a comment
reading "a car back in a yard is back in the common supply, carrying nothing",
and `pooled` does not do that: it strips the load's origin stamp and keeps
`loaded` ON PURPOSE, because a train can retire at a Division Point with freight
aboard. So the comment described an intention the call never carried out, and
every car the Freight Agent cleared reached the Classification Yard carrying a
load already delivered and already paid for.

It bites hardest on coaches: `passengersDetrained` takes `coach && !loaded` out
of the Division Yard and §2.2 refills that yard from Classification, so a
cleared coach came back as stock that could never unload another passenger.
Measured over five three-Day solitaire games: 18 loaded coaches in
Classification against 6 empty. The red box is where a journey ENDS; clearing it
sends the passengers out of the station, or the delivered load into the
industry, and returns the CAR, empty. The option says that now instead of
describing the counter that moves.

SCOPED TO THE RED BOX ON PURPOSE. `retireTrain` also returns loaded cars and is
left alone: that is what `pooled`'s own documentation describes, and a loaded
car in a yard is pre-loaded cargo rather than dead stock — it can be made up and
delivered, and a loaded coach can still detrain. Only the red box's contents had
already finished their journey.

GAMES IN PROGRESS DO RESUME, MEASURED RATHER THAN ARGUED. Yard contents change,
so the worry was real. All twelve saves on the test server were pulled and
replayed through `tryResumeSession` — the server's own boot check — against this
build. Six resume, six refuse, and the six refusals are the SAME six, at the
same moves, with the same codes, that 0.8.0.17 already logged. Nothing new was
stranded. That pre-install replay is a better check than reading the next boot
log, because it answers before the install rather than after.

THE HISTORY SAID "Mainline card 7" and left the reader to remember what card 7
was — with two Plains dealt, which is why the slot is kept beside the name
rather than replaced by it. A second fault sat one word to its left and nobody
reported it: the name was built as `e.key.replace(/([A-Z])/g, ' $1')`, so
`absSignals` printed as "abs Signals" while the action list directly above said
"ABS Signals". `narrate` takes `mainlineAt` and `enhancementName` beside the
`facilityAt` it already had, and `simpleCardName` is exported so the log reads
the same table the buttons do. `mainlineModified` had both faults and is fixed
with it.

LEAVING A RUNNING GAME WAS A DEAD END. `enterSeating` hides the choice section
and only the lobby's own two leave paths put it back; leaving a running game is
a third route, so the lobby came back holding nothing but "Games you are in"
with both doors on the page at display:none and no control able to reveal them.
Reset in `runLobby`, which is the one function every route onto that screen goes
through — which is exactly why the two paths that did it themselves missed a
third.

THE LOBBY'S ACTION BUTTONS CARRY THE BOARD'S AMBER. A list of the actions rather
than `#lobby button`: the settings form under Create is a field of inputs, and
amber on all of it would say everything is a move and so say nothing. A disabled
Start game drops back to chrome.

THE DEPARTMENT REFILL IS A RULE AND IS NOW WRITTEN DOWN. §6.2 — "if any of the
Department decks is empty, draw a Home Office card and place it in the empty
spot" — firing only when the draw actually empties the pile. Kept as implemented
(Jesse's ruling) and stated in rules.md and home-deck.md, neither of which had
ever mentioned it. A rule implemented from the prototype and never written down
is a rule that surprises the table.

1016 fast tests and 35 sim tests pass.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01MUizFYCMHRWhbWwXhp7WPR

docs/rules.md

@@ -1,6 +1,6 @@
 # Station Master — Rules
 
-**Describes the game as built at v0.8.0.17** (2026-09-21). These references are kept current with
+**Describes the game as built at v0.8.1.0** (2026-09-22). These references are kept current with
 every release rather than versioned as editions, so there is no version in the filename: this file
 is always the latest, and the build it describes is stated here.
 
@@ -204,9 +204,25 @@ roll a tail cut into a connected Freight Facility.
 
 **Draw.** Take one card from the face-down Home Office or the exposed top of one Department pile. During this option, play eligible cards and/or discard cards to Department piles, then finish at the hand limit. Track, facilities, offices, modifiers, enhancements, and train cards have the placement or scheduling rules in the deck references. Mainline modifiers are played from this option as well.
 
+> **A Department that is emptied is refilled at once.** §6.2: *"If any of the Department decks is
+> empty, draw a Home Office card and place it in the empty spot."* So taking the last card off a
+> pile does not leave a gap — a fresh card is turned face up from the Home Office deck to replace
+> it, and there are always three Departments to draw from. The refill happens **only** when the
+> draw actually empties the pile; a pile with cards buried under the one taken is not refilled, or
+> the Departments would grow without limit and drain the deck into themselves.
+>
+> This surprised a player at the table (2026-09-22), which is why it is written down here: the rule
+> was implemented from the prototype rules and had never reached this document.
+
 **Freight Agent.** Make one of these operations, then the turn ends: stock one green outbound box from a matching loaded Division Yard car; clear one red inbound box to the Classification Yard; unjam one outbound, inbound, or MEN | AT | WORK load to the Classification Yard; or explicitly end without acting. Freight can be stocked only when an unclaimed empty matching car is already spotted at that industry. Passengers may wait in a green Office box without a train present.
 
-Implementation note, still true at v0.8.0.17: `card.discard` is accepted during Local Operations
+> **A car cleared from a red Inbound box comes back empty.** Whatever was in it has arrived — the
+> passengers are out of the station, or the load is in the industry — and the Revenue for it was
+> paid on arrival, not on clearing. What returns to the Classification Yard is the *car*, in the
+> common supply and carrying nothing. Before v0.8.1.0 it returned still marked loaded, which put
+> coaches into the yards that could never be used to unload another passenger.
+
+Implementation note, still true at v0.8.1.0: `card.discard` is accepted during Local Operations
 without checking that the Draw option was chosen — unlike `card.play`, which does check. This is an
 implementation quirk rather than a fourth published turn option.