import { IMPOSSIBLE, VersionInfo } from '@start9labs/start-sdk'

export const current = VersionInfo.of({
  // `<upstream>:<downstream>` — the upstream half tracks the bundled Station Master tag exactly
  // (`versions.md`'s consistency checklist), so bumping the submodule pin and bumping this are one
  // action. The downstream half moves only for packaging-only changes, and RESETS to `:0` when the
  // upstream half moves.
  //
  // FOUR COMPONENTS IS FINE. ExVer's upstream half is an arbitrary-length dotted number, not semver
  // — checked against the SDK's own parser rather than assumed, since every example in `versions.md`
  // has three: `0.7.9.8:0` parses to upstream `[0,7,9,8]`, which sorts above `[0,7,9]`, so a box on
  // 0.7.9:0 sees this as an update rather than refusing it as a downgrade.
  version: '0.8.0.17:0',
  releaseNotes: {
    en_US:
      'Bundles Station Master v0.8.0.17 — four fixes from a live playtest, every one of them the game ' +
      'knowing something the screen did not say. **Games already running on this server resume ' +
      'normally**: no rule changed. **ABS Signals could be played on only one Mainline card**, although ' +
      'the card says any of them. Nothing was wrong with the rule — the game described every one of ' +
      'those placements with the same words, and the action list hides duplicates, so all but one ' +
      'disappeared before you saw them. **You can now see what is standing on a Mainline card.** One ' +
      'carrying ABS Signals draws a signal mast with a lit lamp at its corner, and the Heavy Grade ' +
      'modifiers draw as BRK, AIR and HLP beside the card\'s name. None of them marked the board at all ' +
      'before: the only way to find out a card was protected — which is what decides whether a second ' +
      'train on it is safe — was to hover it and read the tooltip. **The Freight Agent says what it ' +
      'actually did.** The line read "one car moved to or from a facility" even when nothing had moved, ' +
      'and then said nothing more. Doing nothing is a legitimate choice — the rules ask for no action, ' +
      'and a bot declines rather than break open a working box to look busy — so it now says when it ' +
      'has, and why; and when work does happen it names the car, the industry by name instead of a grid ' +
      'coordinate, and which way the car went. **The whole guide is reachable from inside a game**, in ' +
      'the This Game card: the Quickstart, the Rules in full, every card, both deck references and the ' +
      'Components list, each opening in a new tab so reading one mid-turn does not lose your game. The ' +
      'previous release published the Quickstart alone and the links at its foot all led nowhere. They ' +
      'are served as plain text for now, so their tables come out as rows of pipes. **Smaller:** the ' +
      'action list and the history log had been printing the same square in two different orders, and ' +
      'now agree.',
    es_ES:
      'Incluye Station Master v0.8.0.17 — cuatro correcciones de una partida de prueba, todas del mismo ' +
      'tipo: el juego sabía algo que la pantalla no decía. **Las partidas ya en curso en este servidor ' +
      'se reanudan con normalidad**: no ha cambiado ninguna regla. **Las Señales ABS solo podían ' +
      'jugarse en una carta de Línea Principal**, aunque la carta dice que en cualquiera. La regla ' +
      'nunca estuvo mal: el juego describía todas esas jugadas con las mismas palabras, y la lista de ' +
      'acciones oculta los duplicados, así que todas menos una desaparecían antes de que las vieras. ' +
      '**Ahora se ve qué hay sobre una carta de Línea Principal.** La que lleva Señales ABS dibuja un ' +
      'mástil de señal con una luz encendida en su esquina, y los modificadores de Pendiente Fuerte ' +
      'aparecen como BRK, AIR y HLP junto al nombre de la carta. Antes ninguno marcaba el tablero: la ' +
      'única forma de saber que una carta estaba protegida — lo que decide si un segundo tren sobre ' +
      'ella es seguro — era pasar el ratón por encima. **El Agente de Carga dice lo que hizo ' +
      'realmente.** La línea decía "un vagón movido desde o hacia una instalación" incluso cuando nada ' +
      'se había movido, y luego callaba. No hacer nada es una elección legítima — las reglas no exigen ' +
      'ninguna acción, y un bot prefiere eso a destrozar una caja que funciona — así que ahora lo dice, ' +
      'y explica por qué; y cuando sí hay trabajo, nombra el vagón, la industria por su nombre en vez ' +
      'de una coordenada, y en qué dirección fue. **Toda la guía es accesible desde dentro de la ' +
      'partida**, en la tarjeta Esta Partida: la Guía Rápida, las Reglas completas, todas las cartas, ' +
      'ambas referencias de mazos y la lista de Componentes, cada una en una pestaña nueva para no ' +
      'perder la partida. La versión anterior publicaba solo la Guía Rápida y los enlaces de su pie no ' +
      'llevaban a ninguna parte. Se sirven como texto plano por ahora, así que sus tablas salen como ' +
      'filas de barras. **Menor:** la lista de acciones y el registro imprimían la misma casilla en dos ' +
      'órdenes distintos, y ahora coinciden.',
    de_DE:
      'Enthält Station Master v0.8.0.17 — vier Korrekturen aus einem Testspiel, alle von derselben Art: ' +
      'das Spiel wusste etwas, das der Bildschirm nicht sagte. **Bereits laufende Partien auf diesem ' +
      'Server werden normal fortgesetzt**: keine Regel hat sich geändert. **ABS-Signale konnten nur auf ' +
      'einer einzigen Streckenkarte gespielt werden**, obwohl die Karte jede erlaubt. Die Regel war nie ' +
      'falsch — das Spiel beschrieb alle diese Züge mit denselben Worten, und die Aktionsliste blendet ' +
      'Duplikate aus, sodass alle bis auf einen verschwanden, bevor man sie sah. **Man sieht jetzt, was ' +
      'auf einer Streckenkarte steht.** Eine Karte mit ABS-Signalen zeichnet einen Signalmast mit ' +
      'brennender Lampe in ihrer Ecke, und die Steigungs-Modifikatoren erscheinen als BRK, AIR und HLP ' +
      'neben dem Kartennamen. Bisher markierte keiner von ihnen das Brett: Um zu erfahren, dass eine ' +
      'Karte geschützt ist — was entscheidet, ob ein zweiter Zug darauf sicher ist — musste man mit der ' +
      'Maus darüberfahren. **Der Frachtagent sagt, was er wirklich getan hat.** Die Zeile lautete "ein ' +
      'Wagen zu oder von einer Anlage bewegt", auch wenn sich nichts bewegt hatte, und schwieg dann. ' +
      'Nichts zu tun ist eine legitime Wahl — die Regeln verlangen keine Aktion, und ein Bot verzichtet ' +
      'lieber, als eine funktionierende Box aufzubrechen — also sagt er es jetzt und begründet es; und ' +
      'wenn gearbeitet wird, nennt er den Wagen, die Industrie beim Namen statt einer Koordinate, und ' +
      'die Richtung. **Die ganze Anleitung ist aus dem laufenden Spiel erreichbar**, in der Karte Diese ' +
      'Partie: Schnellstart, die vollständigen Regeln, jede Karte, beide Deck-Referenzen und die ' +
      'Komponentenliste, jeweils in einem neuen Tab, damit das Lesen die Partie nicht verliert. Die ' +
      'vorherige Version veröffentlichte nur den Schnellstart, und die Links an seinem Fuß führten ins ' +
      'Leere. Sie werden vorerst als reiner Text ausgeliefert, ihre Tabellen erscheinen also als Reihen ' +
      'von Strichen. **Kleineres:** Aktionsliste und Verlauf gaben dasselbe Feld in zwei verschiedenen ' +
      'Reihenfolgen aus und stimmen nun überein.',
    pl_PL:
      'Zawiera Station Master v0.8.0.17 — cztery poprawki z rozgrywki testowej, wszystkie tego samego ' +
      'rodzaju: gra wiedziała coś, czego ekran nie mówił. **Partie już trwające na tym serwerze ' +
      'wznawiają się normalnie**: żadna zasada się nie zmieniła. **Sygnały ABS można było zagrać tylko ' +
      'na jednej karcie Magistrali**, choć karta mówi o dowolnej. Zasada nigdy nie była błędna — gra ' +
      'opisywała wszystkie te zagrania tymi samymi słowami, a lista akcji ukrywa duplikaty, więc ' +
      'wszystkie poza jednym znikały, zanim je zobaczyłeś. **Teraz widać, co stoi na karcie ' +
      'Magistrali.** Karta z Sygnałami ABS rysuje maszt sygnałowy z zapaloną lampą w rogu, a ' +
      'modyfikatory Stromego Podjazdu pojawiają się jako BRK, AIR i HLP obok nazwy karty. Wcześniej ' +
      'żaden z nich nie znaczył planszy: jedynym sposobem, by dowiedzieć się, że karta jest chroniona — ' +
      'co decyduje, czy drugi pociąg na niej jest bezpieczny — było najechanie na nią kursorem. **Agent ' +
      'Towarowy mówi, co naprawdę zrobił.** Linia brzmiała "jeden wagon przesunięty do lub z zakładu" ' +
      'nawet wtedy, gdy nic się nie ruszyło, i potem milkła. Nicnierobienie to uprawniony wybór — ' +
      'zasady nie wymagają żadnej akcji, a bot woli odpuścić, niż rozbić działającą skrzynkę — więc ' +
      'teraz to mówi i wyjaśnia dlaczego; a gdy praca się odbywa, nazywa wagon, zakład po nazwie ' +
      'zamiast współrzędnych, i kierunek. **Cały przewodnik jest dostępny z wnętrza gry**, w karcie Ta ' +
      'Partia: Szybki start, pełne zasady, każda karta, obie referencje talii i lista komponentów, ' +
      'każda w nowej zakładce, by czytanie nie zgubiło partii. Poprzednie wydanie publikowało tylko ' +
      'Szybki start, a odnośniki u jego stopy prowadziły donikąd. Na razie są podawane jako zwykły ' +
      'tekst, więc ich tabele wychodzą jako rzędy kresek. **Drobne:** lista akcji i dziennik wypisywały ' +
      'to samo pole w dwóch różnych kolejnościach, a teraz są zgodne.',
    fr_FR:
      'Contient Station Master v0.8.0.17 — quatre corrections issues d\'une partie de test, toutes de la ' +
      'même nature : le jeu savait quelque chose que l\'écran ne disait pas. **Les parties déjà en cours ' +
      'sur ce serveur reprennent normalement** : aucune règle n\'a changé. **Les Signaux ABS ne ' +
      'pouvaient être joués que sur une seule carte de Grande Ligne**, alors que la carte en autorise ' +
      'n\'importe laquelle. La règle n\'a jamais été fautive : le jeu décrivait tous ces placements avec ' +
      'les mêmes mots, et la liste d\'actions masque les doublons, de sorte que tous sauf un ' +
      'disparaissaient avant que vous les voyiez. **On voit maintenant ce qui se trouve sur une carte ' +
      'de Grande Ligne.** Celle qui porte des Signaux ABS dessine un mât de signal avec une lampe ' +
      'allumée dans son coin, et les modificateurs de Forte Rampe apparaissent en BRK, AIR et HLP à ' +
      'côté du nom de la carte. Auparavant aucun ne marquait le plateau : le seul moyen d\'apprendre ' +
      'qu\'une carte était protégée — ce qui décide si un second train peut y rouler sans risque — était ' +
      'de la survoler. **L\'Agent de Fret dit ce qu\'il a réellement fait.** La ligne indiquait "un wagon ' +
      'déplacé vers ou depuis une industrie" même quand rien n\'avait bougé, puis se taisait. Ne rien ' +
      'faire est un choix légitime — les règles n\'exigent aucune action, et un bot préfère s\'abstenir ' +
      'plutôt que d\'éventrer une case qui fonctionne — alors il le dit désormais, et explique pourquoi ' +
      '; et quand il y a du travail, il nomme le wagon, l\'industrie par son nom plutôt qu\'une ' +
      'coordonnée, et le sens du mouvement. **Tout le guide est accessible depuis une partie en ' +
      'cours**, dans la carte Cette Partie : le Démarrage rapide, les Règles complètes, toutes les ' +
      'cartes, les deux références de decks et la liste des Composants, chacune dans un nouvel onglet ' +
      'pour ne pas perdre la partie. La version précédente ne publiait que le Démarrage rapide, et les ' +
      'liens en bas de page ne menaient nulle part. Ils sont servis en texte brut pour l\'instant, leurs ' +
      'tableaux sortent donc en rangées de barres. **Mineur :** la liste d\'actions et l\'historique ' +
      'écrivaient la même case dans deux ordres différents, et concordent désormais.',
  },
  migrations: {
    /**
     * NOTHING TO CARRY, AND CHECKED THE SAME NARROW WAY v0.7.9.8's ENTRY WAS.
     *
     * The rule this package lives by is in the game's README: a save is a seed plus the moves
     * played, replayed through the CURRENT rules, so the only thing that strands an older save is a
     * change that makes a once-legal move illegal. So the question is never "how big was the
     * release" — v0.8.0 is a large one — but "did any predicate change its answer".
     *
     * Measured with `git diff v0.7.9.8..v0.8.0.1 -- src/engine/`. The WHOLE engine diff is eight
     * lines:
     * four `GameEvent` types (`trayMoved`, `carsCoupled`, `carsDropped`, `consistSorted`) gained a
     * `player` field, and the four places that build them pass it. `check()` is untouched, `legal.ts`
     * and `advance.ts` are untouched, and no predicate anywhere was edited. Games in progress resume,
     * and the release notes say so in all five locales rather than leaving it to be discovered.
     *
     * EVENTS ARE NOT PERSISTED, so widening four of them cannot invalidate anything on disk: a
     * `SavedGame` is `{ seed, config, history: Intent[], … }` and the events are derived by replaying
     * it. The narration TEXT of two lines changed with them ("Moved Train 3 …" where it used to read
     * "CREW moved …"), which a resumed game simply regenerates — the log is not stored either.
     *
     * WHAT IS NOT COVERED BY THAT ARGUMENT, and why it still does not need a migration: the wire
     * between this server and a browser gained a lot. `Push` now carries ordered presentation steps
     * and a public-board baseline, and the board deltas changed shape. None of it is on disk, and a
     * browser reloads onto the new page as part of the update, so there is no version skew to
     * migrate — the same reasoning v0.7.9.8 used for its own `Frame` changes.
     *
     * v0.8.0.1 ADDED NOTHING TO THIS ARGUMENT: `git diff v0.8.0..v0.8.0.1 -- src/engine/` is empty.
     * It changed `sim/pacing.ts`, `web/step-queue.ts` and `web/main.ts` — how long a step is shown
     * and when the queue calls itself idle — which is presentation and touches neither the rules nor
     * anything on disk.
     *
     * v0.8.0.2 DOES TOUCH THE ENGINE, and it is worth being exact about why that is still nothing to
     * migrate. `git diff v0.8.0.1..v0.8.0.2 -- src/engine/` is three added lines: `collisionsPrevDay`
     * declared on `GameState`, initialised to 0 in `setup.ts`, and assigned at the Day rollover in
     * `advance.ts`. It is a counter that nothing checks — no predicate reads it, so no once-legal move
     * became illegal.
     *
     * v0.8.0.3 THROUGH v0.8.0.7 ADDED NOTHING: `git diff v0.8.0.2..v0.8.0.7 -- src/engine/` is empty.
     * One moved the Skip button, changed what the waiting row says, and stopped the speed control
     * stretching the clock; one took a hostname out of comments; the last drew the Home Office deck
     * and lit the pile a watched move touched, which is a diff of two frames the client already
     * holds. None of it is a rule, and none of it is on disk.
     *
     * v0.8.0.8 IS DIFFERENT AND IS THE ONE TO READ CAREFULLY: it changes a RULE (Gitea#23). When the
     * Home Office deck is reshuffled, a timetabled train sitting in the SALVAGE YARD is no longer
     * recovered — it was played, its number is on the timetable, and it cannot be run twice. The same
     * card in a DEPARTMENT was discarded rather than played and still comes back, as does any Extra.
     * A duplicate went with it: `trainScheduled` had been pushing a synthetic `train-<n>` beside the
     * real card, so four scheduled trains left eight entries in a pile of four.
     *
     * GAMES IN PROGRESS STILL RESUME, and the reason is the narrow one this package always asks
     * (README § Design notes): a save is a seed plus the moves played, replayed through the CURRENT
     * rules, so what strands one is a change that makes a once-legal move ILLEGAL. Nothing here does.
     * `check()` is untouched; a draw is a draw whatever lies on top of the deck. What differs is the
     * Salvage Yard's depth, which was double-counting, and which cards a reshuffle returns — and a
     * reshuffle is effectively unreachable in ordinary play: eight games driven to 4000 moves across
     * eight seeds produced ZERO. A game that had somehow reshuffled would replay to a different deck
     * order rather than refusing to replay, which is worth knowing and is not the same as breaking.
     *
     * v0.8.0.9 TOUCHES THE ENGINE FOR SPEED, AND PROVED IT CHANGED NOTHING. `git diff v0.8.0.8..v0.8.0.9
     * -- src/engine/` adds a route cache scoped to one unchanged position (`withRouteCache`), splits
     * `applyIntent` into `prepareIntent` + `commitEvents`, trims allocation in `exploreMoves`, adds
     * `legalSwitchingActions`, and exports `badlyMadeUp`, `protoCard` and `extendLimitsIfNeeded` for the
     * bot. No predicate's answer changed: every event and intent of 32 seeded games hashed identical before
     * and after each step, and the game's `test/route-cache.test.ts` pins the split. Everything else is the
     * developer bot, whose past moves are already intents in a save. Games in progress resume.
     *
     * v0.8.0.10 IS THE FIRST BUMP THAT BREAKS RESUMES, AND IT DOES SO DELIBERATELY. It corrects WHEN §8.1
     * asks the Superintendent to rule (Gitea#26): a train on a card BEHIND the one departing is nobody's
     * concern, and was being counted. A save is the seed and the moves replayed through the CURRENT rules,
     * so a game holding a `mainline.clearance` the rules no longer ask for is refused at that move with
     * NO_PENDING_DECISION — `tryResumeSession` reports which move, and `index.ts` logs the refusal and
     * leaves the file alone. Measured before shipping: 40 four-seat co-op games recorded by bots under
     * v0.8.0.9 and replayed under this release — 28 stop, usually 5-40% of the way in. Jesse's call
     * (2026-09-15): no games in progress need keeping, so this ships without a per-game switch for the old
     * rule, and the release notes say so in all five locales. A game worth finishing can be finished by
     * putting v0.8.0.9 back — the save file is untouched.
     *
     * The rest of the release is the screen and the log — who the board says it is waiting on, what the
     * history says and when it says it, a flash on a realigned Mainline card — plus one new read-only
     * route (`GET /api/save?token=…`) that hands a seated player their own save. None of it is on disk.
     *
     * A NEW STATE FIELD CANNOT STRAND A SAVE HERE, which is the property worth naming rather than
     * re-deriving: a `SavedGame` holds `{ seed, config, history }` and NOT a serialised `GameState`.
     * Resuming calls `createGame` — which fills the new field from `setup.ts` — and then replays the
     * intents through the current rules, so the field is populated on the way past. There is no old
     * shape on disk for a new field to be missing from.
     *
     * THE ONE THING THAT WOULD HAVE NEEDED CARE, had it been built the way the plan first described:
     * the display-step collector runs inside `submit()`, and the resume path (`fromMultiplayerSave`)
     * deliberately does not go through `submit()`. So replaying a saved game emits no steps and burns
     * no sequence numbers. A test in the game pins that, because it is a property rather than an
     * accident.
     *
     * v0.8.0.11 RESUMES, AND IT WAS MEASURED THE SAME NARROW WAY — which matters more than usual
     * here, because the release immediately before it is the one that did NOT.
     * `git diff v0.8.0.10..v0.8.0.11 -- src/engine/` is three files and nineteen insertions:
     * `trainArrived` gains an `owner` field (`events.ts`), the one line in `advance.ts` that fills
     * it from `playerAtSeat`, and a Mainline card's printed description losing a sentence about a
     * speed that is not drawn on the card (`content.ts`). `check()` and `legal.ts` are untouched and
     * no predicate was edited, so nothing once legal became illegal. Events are not persisted — a
     * `SavedGame` is `{ seed, config, history }` and the events are derived by replaying it — so
     * widening one of them cannot invalidate anything on disk, exactly as the v0.8.0.1 entry above
     * argues for four of them.
     *
     * THE REST OF THE RELEASE IS THE SCREEN: a Pause control for the catch-up queue, a one-render
     * look at another player's Office Area, the turn chart following the step being replayed rather
     * than the live game, "still needs" on the make-up panel, the amber on an addable yard chip, and
     * save filenames carrying the join code. None of it is a rule and none of it is on disk.
     *
     * v0.8.0.12 TOUCHES THE ENGINE NOT AT ALL, which is the shortest entry this comment has ever
     * had a right to: `git diff v0.8.0.11..v0.8.0.12 -- src/engine/` is EMPTY. The release is the
     * server's HTTP surface, the browser client and the docs — a seat recovery flow (Gitea#33) for
     * a player whose browser has lost the token that is their only identity.
     *
     * WHAT IT ADDS, AND WHY NONE OF IT IS A MIGRATION: two routes (`POST /api/games/<id>/claim`
     * behind the admin secret, `POST /api/claim` for the player following the link), a `?claim=`
     * entry path in the client, and `seatedPlayers` on the administrative game listing. The codes
     * themselves live in memory and are deliberately NOT persisted — minted on demand and spent
     * within minutes, so a restart dropping them is the right failure rather than a loss. Nothing
     * new is written to the volume, no predicate was edited, and `check()` and `legal.ts` are
     * untouched, so no once-legal move became illegal. Games in progress resume, and the release
     * notes say so in all five locales.
     *
     * v0.8.0.13 TOUCHES THE ENGINE AGAIN, AND THE WHOLE DIFF IS TWO LINES.
     * `git diff v0.8.0.12..v0.8.0.13 -- src/engine/` adds a `superintendentChanged` variant to the
     * `GameEvent` union (`events.ts`) and the one `events.push` in `advance.ts` that emits it beside
     * the `actorChanged` that was already there — §5's handover of the Fedora, which the log had been
     * dropping as turn bookkeeping. Nothing was removed and nothing was edited: `check()`, `legal.ts`
     * and every predicate are untouched, so no once-legal move became illegal, and a widened event
     * cannot invalidate anything on disk because events are DERIVED by replaying a `SavedGame` rather
     * than stored in one — the same argument the v0.8.0.1 and v0.8.0.11 entries above make for
     * theirs. Games in progress resume, and the release notes say so in all five locales.
     *
     * THE REST IS THE SCREEN AND THE LOG, none of it on disk: the Division Yard chips now obey the
     * catch-up queue (they did not, and a click during it submitted a real intent against a stale
     * board), the yard counts are read from the shown board rather than the live game, the district
     * picker gained your own seat and is ordered by seat rather than by player index, collisions name
     * the district's owner and the 5 Revenue they lose, a Depot that cannot stock an outbound
     * passenger explains which car it is short of, and the history panel keeps 90 lines. The
     * passenger case is a RULING rather than a fix — §6.3 wants a loaded coach in the Division Yard,
     * and Jesse kept the shortage (Gitea#2's ruling) while ending the silence about it.
     *
     * v0.8.0.14 IS THE SECOND BUMP THAT BREAKS RESUMES, AND LIKE v0.8.0.10 IT DOES SO DELIBERATELY.
     * A Modifier card may no longer be placed outside a player's Limits (§2.1). That REVERSES an
     * earlier ruling of Jesse's — Modifiers were exempt because a Facility standing at the limit has
     * three of its nine spots beyond the sign — and it is exactly the shape of change this package's
     * `UPDATING.md` says to look for: a predicate in `apply.ts` changed its answer, so a move that
     * was legal when it was played is refused on replay.
     *
     * MEASURED, NOT ESTIMATED. The Day 3 playtest save stops at intent 528 of 539 —
     * `card.play c55 → (-2,4)` with the sign at column 3 — eleven moves short of where the table had
     * got to. `tryResumeSession` names the move, `index.ts` logs the refusal, and the file is left
     * untouched, so re-installing v0.8.0.13 finishes any game worth finishing. Jesse's call, knowing
     * it strands the game that was on the box.
     *
     * THE REST OF THE ENGINE DIFF STRANDS NOTHING, and is worth separating from the part that does.
     * `makeUpShort` is a new event reporting that the make-up round could give a train nothing;
     * `switchingEnded` closes a switching turn; `trayMoved` carries the Stage's Move allowance and
     * `consistSorted` carries where the engine ended up; `switch.sortConsist` gained an OPTIONAL
     * `engineAt` (absent means the nose, which is what every sort did before, so an older save
     * replays to the same train). Events are derived by replaying a save rather than stored in one,
     * and an optional intent field defaulting to the old behaviour changes no past move.
     *
     * THE SMALL YARD RULE CHANGED IN THE PERMISSIVE DIRECTION, which cannot strand a save either: a
     * train there may now be sorted with cars ahead of its engine (`implications.md` against the
     * v0.4.5 card text, Jesse's ruling). Nothing once legal became illegal; §8.2's departure check is
     * untouched and still holds a broken-backed train at the Office.
     *
     * v0.8.0.15 AND v0.8.0.16 CHANGE NO RULE AND STRAND NOTHING.
     * `git diff v0.8.0.14..v0.8.0.16 -- src/engine/` is one sentence of card TEXT and one doc
     * comment. The Interchange stopped telling players "Cars may be sorted into any new order here"
     * — a printed capability that has never been implemented, reaching the board through
     * `mainlineDescription`, which `view.ts` renders as a Mainline card's `what`. Nothing reads
     * `sortsCars` to permit a sort; its only live use is marking the card an Extra may be made up
     * on. No predicate was touched, so no once-legal move became illegal.
     *
     * The rest of those two releases is documentation inside the repository — a Quickstart for a new
     * player, and the four hand-written references brought up to the game as it runs. None of it is
     * served by the site or read by the service; it rides along in the image because the Dockerfile
     * copies the game's tree in.
     *
     * SO THE RESUME WARNING IN THESE RELEASE NOTES IS ENTIRELY v0.8.0.14's, and it still applies:
     * a box on 0.8.0.13:0 takes this update in one hop and meets the Modifier rule on the way.
     */
    up: async ({ effects }) => {},
    down: IMPOSSIBLE,
  },
})