feat(mystery): sample 3-room world for engine validation

src/world/rooms.ts

@@ -0,0 +1,44 @@
+import type { Room } from './types'
+
+export const rooms: Record<string, Room> = {
+  foyer: {
+    id: 'foyer',
+    title: '[ Foyer ]',
+    descriptions: {
+      firstVisit:
+        'You stand in the foyer of a house you do not remember entering. The door behind you has closed without sound. A folded letter lies on a small table. A hallway leads north.',
+      revisit: 'The foyer. The door behind you is still closed.',
+      examined:
+        'A foyer with peeling paper. A small table holds nothing but the letter. The air smells of cold stone. A hallway leads north.',
+    },
+    exits: { n: 'hallway' },
+    items: ['letter'],
+    safe: true,
+  },
+  hallway: {
+    id: 'hallway',
+    title: '[ Hallway ]',
+    descriptions: {
+      firstVisit:
+        'A long hallway, lit by nothing. An iron oil lamp sits on a side table. The foyer is south. A stair descends east.',
+      revisit: 'The long hallway.',
+      examined:
+        'The hallway runs further than the house should be wide. The dust on the floor is undisturbed except where you have walked. The oil lamp is on the side table.',
+    },
+    exits: { s: 'foyer', e: 'cellar-stair' },
+    items: ['lamp'],
+  },
+  'cellar-stair': {
+    id: 'cellar-stair',
+    title: '[ Cellar Stair ]',
+    descriptions: {
+      firstVisit:
+        'The stair drops into wet stone. The hallway is west. Something at the bottom is breathing.',
+      revisit: 'The stair to the cellar.',
+      examined: 'The stairs are stone, slick with damp. You can hear water below, and something else.',
+    },
+    exits: { w: 'hallway' },
+    items: [],
+    encounter: 'rat',
+  },
+}