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v0.1.0 — undo, the crew's reach on the board, workers on the card, and four engine bugs

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Fifteen items from two playtest sessions. Three that read as drawing faults were engine
bugs: cars could be added to a train that was not being made up (50 offers in 8 games),
the make-up panel merged two trains and could couple a car to the wrong one, and an
Office upgrade silently deleted what a Modifier had added. A fourth was a sentinel
inside a coordinate's own value range — a Mainline placement travelling as row -1, which
is an ordinary district row.

Trains are now drawn the way they stand: west on the left, nose toward the way the engine
faces, on both the district card and the Division chip. Undo steps back through the game
by replaying the save without its last intent. The switching walk keeps its rejections, so
the board can say why a square is not offered. Laborers and Porters are on the card, and
the rule that a district only grows outwards is finally written down.

Versions start here: third digit for fixes, second for a feature set, 1.0 for a release.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01GgtkX8JnvKa8y2tuJ8aQf4
This commit is contained in:
Jesse
2026-08-08 05:23:17 -04:00
co-authored by Claude Opus 5
parent f4c0f49604
commit 5d825b97d2
20 changed files with 1604 additions and 191 deletions
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src/engine/advance.ts
+3 -21
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@@ -20,7 +20,6 @@ import {
COLLISION_PENALTY,
MAINLINE_PROFILES,
enhancementRule,
consistSize,
crossingStages,
trainProfile,
MOVES_PER_LOCAL_OPS,
@@ -35,7 +34,9 @@ import {
} from './content.ts';
import type { Direction } from './content.ts';
import type { GameEvent } from './events.ts';
import { acceptsCar, areaOf } from './apply.ts';
// `trainNeedingCars` lives in apply.ts beside `check`'s copy of the same question, so the phase and
// the legality test cannot disagree about which train is being assembled.
import { areaOf, trainNeedingCars } from './apply.ts';
import { legalActions } from './legal.ts';
import type { CrewTray, DivisionNode, GameState, PlayerIndex, RollingStock, TrayId } from './state.ts';
import { coordKey, freshTurn, totalRevenue } from './state.ts';
@@ -286,25 +287,6 @@ function trainRunning(s: GameState, number: number, isExtra: boolean): boolean {
return false;
}
/** A made-up train still short of its consist spec, with a suitable car available. */
function trainNeedingCars(s: GameState): TrayId | null {
for (const [id, tray] of s.trays) {
if (tray.trainNumber === null) continue;
if (tray.position.at !== 'divisionPoint') continue;
const profile = trainProfile(tray.trainNumber, tray.trainIsExtra);
if (!profile) continue;
const want = consistSize(profile.consist);
if (tray.consist.length >= want) continue;
// Consists are specified by CATEGORY — "Freight (2)" is any two freight cars — so any car in
// the yard is potentially suitable unless the card narrows it.
// Ask the SAME predicate `check` uses. A separate copy of this test stalled the game: the phase
// believed a car could be added while check rejected every option, so the Stage never ended.
const suitable = s.yards.divisionYard.some((c) => acceptsCar(tray, c.type));
if (suitable) return id;
}
return null;
}
// ---------------------------------------------------------------------------
// Mainline Phase (§8) — automatic, except the Superintendent's clearance ruling
// ---------------------------------------------------------------------------