Cold-chain review fixes: reload-dodge, crash-safety, fair ceiling (6 findings)

Adversarial review of the cross-day loop found six real issues; all fixed
and re-verified:
- RELOAD EXPLOIT (edge-case): enterPan consumed + persisted fridge stock
  at day-START, so a reload mid-pan re-fetched null and DODGED the rot-cap
  (and honest players lost the ingredient). Now the consumed stock is held
  (pendingFridge) and committed atomically with the day advance in onNext —
  a reload re-fetches the same item deterministically. Verified: after
  entering day 18 the mushroom is still in save.fridge until the day turns.
- CRASH (edge-case): loadSave passed save.fridge unvalidated → restoreStore
  hard-crashed on a corrupt/unknown-zone entry. restoreStore is now
  corruption-tolerant (guards Array + known zone). Verified: garbage save
  → no crash, falls back to a fresh ingredient.
- FAIRNESS (design): The Ingredient scored linearly on quality, so even a
  perfectly-stored 'fresh' mushroom (0.77) capped the ceiling below S. Now
  scored on the freshness BAND — fresh = full marks — so optimal cold
  storage reaches S (verified 0.77 'fresh' from the coldest back shelf),
  use-soon dents (A), off/dangerous near-zero + hard-cap (F).
- word/quality mismatch: usableQuality's word now derives from the docked
  quality (a thawed item reads its real handed-over state).
- freezer thaw 0.82 -> 0.78: a 3-day-frozen mid-perishable (0.75) no longer
  out-scores the coldest fridge shelf (0.77) — the texture cost is real.
- rename-safety: FRIDGE_MUSHROOM_ID shared constant couples the two days.

Gradient verified: optimal->S, decent->A(7.4), bad->F(3.0); plain pan 8.0.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

KITCHEN-ATLAS.md

@@ -249,8 +249,18 @@ door), shut the door, three days compress-pass (items recolour as they spoil), a
 `judgeFridge` scores THE FRIDGE (The Cold / Hygiene) + The Waste with the hygiene-
 inspector line bank. Verified live: good storage (raw low, perishables cold, RTE
 high) grades **S (10.0)**; bad storage (raw high in the warm door, crammed) grades
-**C (3.5)** — 38% off, 38% dripped on, 3 wasted. Cross-day carryover (fridge ages
+**C (3.5)** — 38% off, 38% dripped on, 3 wasted.
-in the save between days) and the FIFO pull-for-a-cook are the remaining polish.
+
+**CROSS-DAY LOOP SHIPPED**: the fridge persists in the save (`serializeStore`/
+`restoreStore`) — what you stock on day 17 is still there on day 18. Day 18 "the
+lunch rush" pan-sears **the very mushrooms from your own fridge** (`fetch` FIFO);
+the fetched `usableQuality` is a judged row ("The Ingredient") and a genuinely off
+one HARD-CAPS the dish — no sear saves rot. Verified: identical cook (72%/57% sear),
+well-stored mushroom → **7.4/10**, badly-stored (warm door) → same sear, off
+ingredient → **3.0/10 (F)**; plain pan day unaffected (8.0). Judge: "No sear saves a
+bad mushroom. The fridge did this, not the flame." Remaining polish: per-day-transition
+ageing (currently the fridge day's own 3-day compress does the ageing) and the fetch
+wired into the grill/other cooks too.
 
 
 The cure is time you *want*; the cold chain is time you *fight*. `src/sim/coldchain.ts`

src/dev.ts

@@ -517,6 +517,35 @@ export function installDevHarness(app: App, game: Game): void {
       return { fuel, wind, sheltered, mean: +mean.toFixed(3), stdev: +stdev.toFixed(4) };
     },
 
+    /** The cross-day arc: stock the fridge on day 17 (well or badly), then cook
+     *  those very mushrooms on day 18. Bad storage → an off mushroom caps the sear. */
+    coldChainArc(goodStorage = true) {
+      harness.fridgeDay(goodStorage); // day 17: stock + 3 days + serve
+      run(5);
+      // Advance to day 18 (the judge's NEXT button bumps the day + beginDay).
+      const g = game as unknown as { save: { day: number; fridge?: unknown[] } };
+      const storedCount = g.save.fridge?.length ?? 0;
+      game.setDay(18);
+      run(6);
+      const atPan = app.currentView === game.panView ? 'pan' : 'other';
+      const fetched = (game as unknown as { panIngredient: { quality: number; word: string } | null }).panIngredient;
+      // Cook it well and serve — only the fetched ingredient's quality varies.
+      const pv = game.panView as unknown as { session: import('./sim/pan').PanSession };
+      const s = pv.session;
+      if (s) {
+        setPanKnob(s, 7); addButter(s);
+        let guard = 0; while (butterState(s) !== 'foaming' && guard++ < 60 * 30) run(1);
+        addFood(s, 'button_mushroom', 'A');
+        for (let i = 0; i < 60 * 8; i++) run(1);
+        flip(s);
+        for (let i = 0; i < 60 * 9; i++) run(1);
+        tap('Enter'); run(5);
+      }
+      const rows = [...document.querySelectorAll('.crit')].map((e) => e.textContent);
+      const gradeEl = document.querySelector('.judge-grade, .grade');
+      return { storedCount, atPan, fetched, grade: gradeEl ? gradeEl.textContent : null, rows };
+    },
+
     /** Play the whole day-17 fridge order: route in, put the delivery away
      *  (well or badly), shut the door (3 days), serve, read the scorecard. */
     fridgeDay(good = true) {

src/game/game.ts

@@ -8,6 +8,7 @@ import { OvenView } from '../scenes/oven';
 import { GrillView } from '../scenes/grill';
 import { PanView } from '../scenes/pan';
 import { FridgeView } from '../scenes/fridge';
+import { serializeStore, restoreStore, fetch as fetchStock, usableQuality, type StoredItemSave } from '../sim/coldchain';
 import { AssemblyView } from '../scenes/assembly';
 import type { CutPattern } from '../sim/cutting';
 import type { IngredientId } from '../sim/ingredients';
@@ -36,6 +37,9 @@ interface Save {
   day: number;
   total: number;
   best: Record<string, number>;
+  /** The cold store, persisted: what you stocked on a fridge day is still there
+   *  (and older) when a later cook reaches in for it. */
+  fridge?: StoredItemSave[];
 }
 
 /**
@@ -139,6 +143,12 @@ export class Game {
       this.kitchen.flash(cut.knife === 'the_best_thing' ? 'cut with The Best Thing' : 'now toast it');
     };
     this.judgeView.onNext = () => {
+      // Commit any fridge consumption atomically with the day advance: a reload
+      // before this point re-derives the same fetch, so the cap can't be dodged.
+      if (this.pendingFridge) {
+        this.save.fridge = this.pendingFridge;
+        this.pendingFridge = null;
+      }
       this.save.day++;
       writeSave(this.save);
       this.beginDay();
@@ -537,6 +547,9 @@ export class Game {
     this.timing = false;
     const seconds = this.orderSeconds;
     const slice = this.kitchen.currentSlice;
+    // Persist the stock exactly as you left it — a later cook reaches into THIS
+    // fridge, at whatever freshness your storage (and the days) left each item.
+    this.save.fridge = serializeStore(result.store);
     const v = judgeFridge(result, this.order, seconds);
     this.save.total += v.total;
     const key = `day${this.order.day}`;
@@ -551,8 +564,28 @@ export class Game {
   }
 
   /** The pan day (M17): a fuel-aware hob — butter it, foam it, flip it, serve. */
+  /** When a pan day fetches its food from the fridge, what came out. */
+  private panIngredient: { quality: number; word: string } | null = null;
+  /** The fridge stock AFTER this day's fetch, held until the day actually advances
+   *  (committed in onNext) — so a mid-service reload re-fetches the same item and
+   *  can't dodge the rot-cap or silently lose the ingredient. */
+  private pendingFridge: StoredItemSave[] | null = null;
+
   private enterPan(): void {
     const p = this.order.pan!;
+    this.panIngredient = null;
+    this.pendingFridge = null;
+    if (p.fromFridge && this.save.fridge?.length) {
+      // Reach into the fridge you stocked: FIFO, at whatever freshness your storage
+      // left it. The consumed stock is HELD (pendingFridge), not written yet.
+      const store = restoreStore(this.save.fridge);
+      const got = fetchStock(store, p.food);
+      if (got) {
+        const q = usableQuality(got);
+        this.panIngredient = { quality: q.quality, word: q.word };
+        this.pendingFridge = serializeStore(store);
+      }
+    }
     this.pan.reset(p.food, p.fuel);
     this.hideAllScenes();
     this.pan.root.visible = true;
@@ -568,7 +601,7 @@ export class Game {
     this.timing = false;
     const seconds = this.orderSeconds;
     const slice = this.kitchen.currentSlice;
-    const v = judgePan(result, this.order, seconds);
+    const v = judgePan(result, this.order, seconds, this.panIngredient ?? undefined);
     this.save.total += v.total;
     const key = `day${this.order.day}`;
     this.save.best[key] = Math.max(this.save.best[key] ?? 0, v.total);
@@ -762,7 +795,7 @@ function loadSave(): Save {
     if (raw) {
       const s = JSON.parse(raw) as Partial<Save>;
       if (typeof s.day === 'number' && s.day >= 1) {
-        return { day: s.day, total: s.total ?? 0, best: s.best ?? {} };
+        return { day: s.day, total: s.total ?? 0, best: s.best ?? {}, fridge: s.fridge };
       }
     }
   } catch {

src/game/judging.ts

@@ -550,7 +550,7 @@ export function judgeFridge(h: ReturnType<typeof storeHealth>, order: Order, sec
 // M17 — The pan. Did both faces land a proper sear (the flip), did you cook in
 // good butter not burnt (the bitterness), and is the finished piece even.
 
-export function judgePan(r: PanResult, order: Order, seconds: number): Verdict {
+export function judgePan(r: PanResult, order: Order, seconds: number, ingredient?: { quality: number; word: string }): Verdict {
   const seared = clamp01(r.doneScore);
   const criteria: Criterion[] = [
     {
@@ -585,13 +585,32 @@ export function judgePan(r: PanResult, order: Order, seconds: number): Verdict {
       detail: `${Math.round(seconds)}s`,
     },
   ];
+  // If the mushroom came out of the fridge, its freshness is judged on its own
+  // row — and a genuinely off ingredient CAPS the whole dish, because no sear
+  // saves rot. You can't cook your way out of bad storage.
+  if (ingredient) {
+    // Scored on the freshness BAND, not raw quality: a genuinely fresh ingredient
+    // is full marks (so perfect storage still leaves S on the table — the floors
+    // law), use-soon is a real dent, off/dangerous is near-zero and hard-caps below.
+    const bandScore = ingredient.word === 'fresh' ? 1 : ingredient.word === 'use soon' ? 0.55 : ingredient.word === 'off' ? 0.2 : 0;
+    criteria.push({
+      key: 'ingredient',
+      group: 'pan',
+      label: 'The Ingredient',
+      score: bandScore,
+      weight: 1.2,
+      detail: `off the shelf — ${ingredient.word}`,
+    });
+  }
   let sum = 0;
   let wsum = 0;
   for (const c of criteria) {
     sum += c.score * c.weight;
     wsum += c.weight;
   }
-  const total = (sum / wsum) * 10;
+  let total = (sum / wsum) * 10;
+  // A dangerous/off ingredient hard-caps the total — you served it, after all.
+  if (ingredient && ingredient.quality < 0.4) total = Math.min(total, 3 + ingredient.quality * 5);
   const rankable = criteria.filter((c) => c.key !== 'time');
   const sorted = [...rankable].sort((a, b) => a.score - b.score);
   void order;

src/game/lines.ts

@@ -367,6 +367,22 @@ Object.assign(BANK, {
   },
 });
 
+// The fetched ingredient — the cook who reads a use-by date.
+Object.assign(BANK, {
+  ingredient: {
+    bad: [
+      'This was off before it hit the pan. You stored it in the door, didn\'t you. Three days ago.',
+      'No sear saves a bad mushroom. The fridge did this, not the flame.',
+      'You cooked something that had already given up. I can taste the fridge door.',
+      'Fresh is a choice you make days early. You made the other one.',
+    ],
+    good: [
+      'The mushroom was still perfect. Cold, back of the fridge, used in time. That is the whole craft before the pan even lights.',
+      'Fresh off the shelf. You store like someone who respects the ingredient.',
+    ],
+  },
+});
+
 // The pan — the butter snob.
 Object.assign(BANK, {
   pansear: {

src/game/orders.ts

@@ -5,6 +5,7 @@ import { CUT_BANDS, type CutClass } from '../sim/slicing';
 import type { CutPattern } from '../sim/cutting';
 import type { IngredientId } from '../sim/ingredients';
 import type { JuicerId } from '../sim/juicing';
+import { FRIDGE_MUSHROOM_ID } from '../sim/coldchain';
 
 /**
  * A stop at the prep bench before the toaster. M11 shipped the 'cut' kind;
@@ -100,8 +101,10 @@ export interface Order {
    *  the whole day to the outdoor grill instead of the toaster. */
   grill?: string[];
   /** The pan (M17): the food to sear, and the fuel the hob runs on. Presence
-   *  sends the day to the pan — butter it, foam it, flip it, don't burn it. */
+   *  sends the day to the pan — butter it, foam it, flip it, don't burn it.
-  pan?: { food: string; fuel: string };
+   *  `fromFridge` pulls the food out of your stored stock — how you stocked it
+   *  days ago decides how fresh it is now. */
+  pan?: { food: string; fuel: string; fromFridge?: boolean };
   /** The cold chain: a delivery to put away. Presence sends the day to the
    *  fridge — raw low, perishables cold, don't cram it, then three days pass. */
   fridge?: boolean;
@@ -401,6 +404,21 @@ export const DAYS: Order[] = [
     text: 'The order came in. Put it away before the inspector does his rounds — raw meat down low where it can\'t drip, the perishables in the cold at the back, and don\'t cram one shelf or nothing breathes. Three days till he looks.',
     fridge: true,
   },
+  {
+    day: 18,
+    brand: 'the bakery loaf',
+    bread: 'white',
+    spread: 'butter',
+    amount: 'normal',
+    browning: 0.55,
+    browningName: 'golden',
+    noChar: true,
+    tool: 'butter_knife',
+    butterSoftness: 0.5,
+    who: 'the lunch rush',
+    text: 'Pan-sear the mushrooms — the ones from your own fridge. Whatever shape they\'re in now is the shape you stored them in. Butter, foam, both faces. No excuses about the delivery; that was your fridge.',
+    pan: { food: FRIDGE_MUSHROOM_ID, fuel: 'gas', fromFridge: true },
+  },
 ];
 
 /** Days beyond the script — keep going, with everything cranked. */

src/scenes/fridge.ts

@@ -10,6 +10,7 @@ import {
   coldStep,
   storeHealth,
   ZONE_COLD,
+  FRIDGE_MUSHROOM_ID,
 } from '../sim/coldchain';
 import { el, Panel } from '../ui/hud';
 
@@ -151,6 +152,7 @@ export class FridgeView implements View {
       { id: 'salad', perish: 1, rte: true, color: 0x5aa84a },
       { id: 'cheese', perish: 0.7, rte: true, color: 0xe6c34e },
       { id: 'berries', perish: 1.6, rte: true, age: 1, color: 0x8a3d78 },
+      { id: FRIDGE_MUSHROOM_ID, perish: 1.3, color: 0xd8cbb0 },
       { id: 'onion', perish: 0.3, color: 0xb99a5b },
     ];
     spec.forEach((sp, i) => {

src/sim/coldchain.ts

@@ -50,6 +50,10 @@ export const FRESH = 0.7;
 export const USE_SOON = 0.4;
 export const OFF = 0.15;
 
+/** The mushroom that ties the fridge day (delivery) to the pan day (fetch). One
+ *  id, so a rename can't silently uncouple the two days. */
+export const FRIDGE_MUSHROOM_ID = 'button_mushroom';
+
 /** Base spoilage per DAY at bench temp, before the item's own perishability.
  *  Spoilage lives on the day clock, not the second clock — food goes off across
  *  days (the cure system's twin), and a service leaves things out for a fraction
@@ -183,11 +187,15 @@ export function freshnessWord(it: StoredItem): FreshWord {
  * a serve you do not walk back.
  */
 export function usableQuality(it: StoredItem): { quality: number; safe: boolean; word: FreshWord } {
-  const word = freshnessWord(it);
   let q = it.freshness;
-  if (it.frozen) q *= 0.82; // thawed texture
+  if (it.frozen) q *= 0.78; // thawed texture — steep enough that a 3-day freeze on a
+  //                           mid-perishable no longer beats the coldest fridge shelf.
   if (it.contaminated) q *= 0.4;
-  return { quality: Math.max(0, q), safe: it.freshness > OFF && !it.contaminated, word };
+  q = Math.max(0, q);
+  // The word describes what you're ACTUALLY handed (post-thaw, post-drip), not the
+  // raw freshness — a frozen item can read "fresh" on the shelf and "use soon" on the plate.
+  const word: FreshWord = q >= FRESH ? 'fresh' : q >= USE_SOON ? 'use soon' : q >= OFF ? 'off' : 'dangerous';
+  return { quality: q, safe: it.freshness > OFF && !it.contaminated, word };
 }
 
 /** The inspector's storage read: hygiene, rotation, and what's gone off on your watch. */
@@ -211,3 +219,37 @@ export function storeHealth(s: ColdStore): { fresh: number; off: number; contami
     waste: s.wasteCount,
   };
 }
+
+/** A plain snapshot of the stock for the save file (no Rng, no functions). */
+export type StoredItemSave = Omit<StoredItem, never>;
+
+/** Flatten every zone's items to a plain array — each item already knows its zone. */
+export function serializeStore(s: ColdStore): StoredItemSave[] {
+  const out: StoredItemSave[] = [];
+  for (const zone of Object.keys(s.zones) as ZoneId[]) for (const it of s.zones[zone]) out.push({ ...it });
+  return out;
+}
+
+/** Rebuild a store from a save snapshot (a fresh Rng — spoilage is deterministic).
+ *  Corruption-tolerant: a garbled save (unknown zone, non-array, junk item) yields
+ *  an empty/partial store rather than an uncaught crash — the save intent of loadSave. */
+export function restoreStore(items: StoredItemSave[], seed = 20260720): ColdStore {
+  const s = newColdStore(seed);
+  if (Array.isArray(items)) for (const it of items) if (it && s.zones[it.zone]) s.zones[it.zone].push({ ...it });
+  return s;
+}
+
+/** Take one item of `id` out of the store, oldest-first (FIFO) across the whole
+ *  fridge — the cook reaches in for stock. Returns null if you've none. */
+export function fetch(s: ColdStore, id: string): StoredItem | null {
+  let found: { zone: ZoneId; idx: number; it: StoredItem } | null = null;
+  for (const zone of Object.keys(s.zones) as ZoneId[]) {
+    const arr = s.zones[zone];
+    for (let i = 0; i < arr.length; i++) {
+      if (arr[i].id === id && (!found || arr[i].age > found.it.age)) found = { zone, idx: i, it: arr[i] };
+    }
+  }
+  if (!found) return null;
+  s.zones[found.zone].splice(found.idx, 1);
+  return found.it;
+}