diff --git a/LANEHANDOVER.md b/LANEHANDOVER.md
index 3c6b51f..c3f1cc4 100644
--- a/LANEHANDOVER.md
+++ b/LANEHANDOVER.md
@@ -1379,3 +1379,72 @@ PLAY IT → "It landed." incident ✓ · organic request appeared during screens
 - Tween-leak hunt (DoorScene, ~1.1k live 800ms tweens) is running in a separate
   session — this session deliberately avoided DoorScene.
 - Shelf remaining: ROOM boss week, bartender shift.
+
+## SESSION — FABLE-SOLO-12 · 2026-07-21
+
+**Branch:** main (solo session, Fable, on ultra — took over from JING5) ·
+**Gate:** lint ✓ build ✓ test ✓ (701 tests, 45 files)
+**Deployed:** https://monsorrobot.games/not-tonight/ (rsync, curl 200)
+
+### 1. Tween-leak fix landed on main
+`claude/epic-faraday-332679` (pure `tutorialAlpha()` + tests) was finished but
+never merged. Ported onto main as 41e93d0 (merge itself was permission-blocked;
+same diff, file checkout + commit).
+
+### 2. The bartender shift (docs/SCENARIOS.md, design §6 role ladder)
+`scenes/floor/barShift.ts` (pure, tested) + FloorDemoScene wiring + strings.
+- **Enter/exit**: E at the till front (tile 47,6) teleports you behind the taps
+  (47,3), movement locks, E steps off. Blocked with a rack or cup in hand.
+- **Orders**: stream `'barOrders'` (~1 per 18s) picks an `atBar` agent (60s
+  per-patron cooldown); ChoiceOverlay shows the asker's doll + a per-stage
+  order line (`BAR_ORDER_LINES` — the spelling degrades with the stage; the
+  order IS the sobriety read).
+- **`judgeCall(call, stage)`** prices everything (§4.3): SERVE = vibe +1 and a
+  real +0.06 pour, breach at messy/maggot (the vibe still pays — the bribe is
+  immediate, the price arrives later); WATER = watered() −0.07, vibe +1 on
+  loose+, aggro +1 snub on sober/tipsy; CUT OFF = sendsHome either way, right
+  call vibe +1 aggro +1, early call vibe −1 aggro +2.
+- **RSA write-up**: breach pours have a 35% seen-chance → ONE deferred heat
+  strike (stable reason `'served alcohol to a visibly intoxicated patron'`,
+  shouldRecordStrike dedupes a whole bad shift), 6–26 clock-min later, with a
+  Dazza heads-up text.
+- `CrowdSim.sendHome()` is new public API (cut-off patrons walk themselves out).
+- Incidents: `barShift` / `barServe`.
+
+### 3. ROOM boss week (design §6, venue 4 — first cut)
+- **`data/venues.ts`**: ROOM entry (60 licensed, 1.2 arrivals, inspector,
+  `ruleLimit: 0`, crowd weights) + two new VenueDef flags:
+  `shuffleDressCode`, `lipRead`. Promotion after Elevate is automatic
+  (venueByIndex/TOTAL_VENUES were already generic).
+- **Dress-code shuffle** (`rules/dressCode.ts`): module-level mode set by
+  NightScene each night (`setDressCodeShuffle(seed|null)`) — judge(), Kayden,
+  the card and the sim all read the same set with zero signature churn.
+  `SHUFFLE_EVERY_MIN = 15`, `SHUFFLE_RULE_COUNT = 3`, Fisher–Yates over the
+  full rulebook per (seed, window), stable within a window. DoorScene rebuilds
+  the card on the window turn (`DressCodeCard.setAll`) + toast + buzz; the
+  board opens already written (no announcements, `ruleLimit 0` keeps Dazza's
+  rule texts out while his other pins still fire).
+- **Lip-read dialogue** (`rules/lipRead.ts`, pure): every rope line renders as
+  bracketed uppercase guesses — FNV-1a per (patron, word index), so re-asking
+  never rerolls; 12% lost `[???]`, competing two-guess mishearings from a
+  club-nonsense pool (`[FIST? LIST?]`), quotes dropped (it's your reading, not
+  their words). Wired via `PatronUpView.lipRead` (both speak() and scripted
+  sayLater() beats).
+
+### Verified in the pane (frame-stepped)
+Bartender: taps target/enter/lock/exit ✓ · per-stage order line + doll in
+overlay ✓ · serve breach vibe+1 intox+0.06 + incident ✓ · water snub aggro+1 ✓
+· cutoff → headingHome ✓ · deferred RSA strike scheduled with dazza text ✓ ·
+screenshot. ROOM (save warped to venueIndex 3): boots venue 'room', board
+pre-written (3 rules), window turn at clock 15 rewrote card + toast ✓ ·
+lip-read bubble `[EVENING] [???]` ✓ · screenshot.
+NOTE for pane verification: dispatched KeyboardEvents pile up in Phaser's queue
+while rAF is frozen and REPLAY EN MASSE on the next dispatch — drive overlay
+verbs with direct `handleKey()` calls, never synthetic keydowns.
+
+### Notes
+- Dress-code shuffle is module-level state (set per night). Any future scene
+  that judges dress outside a night must call `setDressCodeShuffle(null)` or
+  inherit ROOM's board. Tests always reset in afterEach.
+- Shelf: SCENARIOS.md fully ✅. Remaining §6 role-ladder ideas (Head of
+  Security finale arc, roster board) have no shelf entries yet.
diff --git a/docs/SCENARIOS.md b/docs/SCENARIOS.md
index 4a7f20a..437167d 100644
--- a/docs/SCENARIOS.md
+++ b/docs/SCENARIOS.md
@@ -70,9 +70,12 @@ Status: ✅ implemented · 🔜 next nibbles · 💡 backlog.*
 
 ## Systems worth a whole phase
 
-- 💡 **Venue 4 / ROOM boss week** (design §6): dress code re-randomises every
-  15 in-game minutes; dialogue rendered as lip-read guesses under the loudest
-  mix arc.
+- ✅ **Venue 4 / ROOM boss week** (2026-07-21, first cut): fourth rung on the
+  ladder (promotes from Elevate). No Dazza rule chronology — the board IS the
+  law and re-randomises every 15 in-game minutes (3 rules per window, seeded,
+  with a toast on the turn); every rope line renders as bracketed lip-read
+  guesses (`[FIST? LIST?]`) because the techno ate the dialogue. 60 licensed,
+  1.2 arrival scale, inspector working, crowd of heads and VIP-claimers.
 - ✅ **The DJ shift** (2026-07-20, first cut): E at the booth hands you the decks
   while the resident steps out. B pulls the bass (the room leans in); SPACE
   drops, judged against the LIVE bar line (clean/late/clang — early and late
@@ -80,5 +83,9 @@ Status: ✅ implemented · 🔜 next nibbles · 💡 backlog.*
   odds ("got any dnb", nan's song, the DUN DUN one) and three answers that all
   cost something. A build held too long runs out of stairs. Movement locks
   while you hold them; the floor and the door keep happening without you.
-- 💡 **Bartender shift**: the bar geometry and RSA scoring already exist;
-  pour-and-cut-off from the other side of the counter.
+- ✅ **Bartender shift** (2026-07-21, first cut): E at the till hands you the
+  taps (movement locks; the floor keeps happening). Orders arrive as choices —
+  the order line degrades with the patron's stage (the spelling IS the sobriety
+  test) — SERVE / WATER / CUT OFF all legal, all priced. Serving messy/maggot
+  is the RSA breach: the vibe pays up front, and 35% of the time somebody with
+  a lanyard saw it (ONE deferred write-up per night, deduped by reason).
diff --git a/src/data/strings/door.ts b/src/data/strings/door.ts
index 341d3ba..8676953 100644
--- a/src/data/strings/door.ts
+++ b/src/data/strings/door.ts
@@ -158,6 +158,14 @@ export const ripenLine = (stage: string, roll: number): string => {
  * Dazza rescinding a rule when a newer one pushes it off the card
  * (rules cap at ACTIVE_RULE_CAP — his attention span, not a settings screen).
  */
+/** ROOM (design §6): the board rewrote itself again. Indexed by window. */
+export const BOARD_SHUFFLE_TOASTS: readonly string[] = [
+  'the board flickers. new code. no explanation.',
+  'the board changed while you were reading it.',
+  'new code on the board. the board does not negotiate.',
+  'the board again. someone back there is just typing.',
+];
+
 export const RULE_RETRACTIONS: readonly string[] = [
   'dazza: forget the "{rule}" thing. new priorities',
   'dazza: "{rule}" is over. keep up',
diff --git a/src/data/venues.ts b/src/data/venues.ts
index a26a4a5..69ad89e 100644
--- a/src/data/venues.ts
+++ b/src/data/venues.ts
@@ -22,6 +22,10 @@ export interface VenueDef {
    * identity. Omitted keys keep their default weight.
    */
   archetypeWeights?: Partial<Record<import('./types').Archetype, number>>;
+  /** ROOM (design §6): the dress code re-randomises every 15 in-game minutes. */
+  shuffleDressCode?: boolean;
+  /** ROOM (design §6): rope dialogue renders as lip-read guesses. */
+  lipRead?: boolean;
 }
 
 export const VENUES: readonly VenueDef[] = [
@@ -59,6 +63,22 @@ export const VENUES: readonly VenueDef[] = [
     // or is filming. Regulars don't come here; they can't get in either.
     archetypeWeights: { influencer: 18, ownersMate: 7, financeBro: 14, punter: 38, regular: 3 },
   },
+  {
+    id: 'room',
+    name: 'ROOM',
+    pitch: 'no sign. no socials. code changes when the board says so. u wont hear a word anyone says. good luck',
+    licensed: 60,
+    arrivalScale: 1.2,
+    // Dazza doesn't announce rules here — the board is the law and it keeps
+    // rewriting itself (shuffleDressCode). His other texts still land.
+    ruleLimit: 0,
+    inspector: true,
+    shuffleDressCode: true,
+    lipRead: true,
+    // Underground techno: heads and chancers. Everyone claims VIP; almost
+    // nobody is. Regulars can't find the door.
+    archetypeWeights: { punter: 34, influencer: 12, ownersMate: 9, quietMessy: 8, financeBro: 10, regular: 2, fresh18: 6 },
+  },
 ];
 
 export const TOTAL_VENUES = VENUES.length;
diff --git a/src/rules/dressCode.ts b/src/rules/dressCode.ts
index d0ae153..901943a 100644
--- a/src/rules/dressCode.ts
+++ b/src/rules/dressCode.ts
@@ -6,6 +6,7 @@
 // text that announced it is unplayable, and two hand-kept copies always drift.
 
 import './doorTypes';
+import { SeededRNG } from '../core/SeededRNG';
 import { DAZZA_TEXTS } from '../data/strings/dazza';
 import type { DressCodeRule, OutfitLayer, OutfitSlot, Patron } from '../data/types';
 
@@ -168,8 +169,42 @@ export const DRESS_CODE_RULES: readonly DoorDressCodeRule[] = SPECS.map(build).s
  */
 export const ACTIVE_RULE_CAP = 4;
 
+// ---- ROOM shuffle (design §6) ----------------------------------------------
+// The boss venue re-randomises the code every 15 in-game minutes: no Dazza
+// chronology, the board IS the law. Module-level mode set by NightScene each
+// night (null = normal announcements) — threading a venue through every
+// violations() caller bought nothing but noise, and every consumer must agree
+// on the live set anyway or the card lies.
+
+export const SHUFFLE_EVERY_MIN = 15;
+export const SHUFFLE_RULE_COUNT = 3;
+
+let shuffleSeed: number | null = null;
+
+export function setDressCodeShuffle(seed: number | null): void {
+  shuffleSeed = seed;
+}
+
+/** Which 15-minute window `clockMin` falls in — the board changes on the turn. */
+export function shuffleWindow(clockMin: number): number {
+  return Math.floor(Math.max(0, clockMin) / SHUFFLE_EVERY_MIN);
+}
+
+function shuffledRules(clockMin: number, seed: number): DoorDressCodeRule[] {
+  // One deterministic deck per (seed, window): re-reading the board mid-window
+  // must not reroll it.
+  const rng = new SeededRNG(seed ^ Math.imul(shuffleWindow(clockMin) + 1, 0x9e3779b9)).stream('code');
+  const deck = [...DRESS_CODE_RULES];
+  for (let i = deck.length - 1; i > 0; i--) {
+    const j = rng.int(0, i);
+    [deck[i], deck[j]] = [deck[j]!, deck[i]!];
+  }
+  return deck.slice(0, SHUFFLE_RULE_COUNT);
+}
+
 /** Every rule Dazza has EVER texted tonight, live or rescinded. */
 export function announcedRules(clockMin: number): DoorDressCodeRule[] {
+  if (shuffleSeed !== null) return shuffledRules(clockMin, shuffleSeed);
   return DRESS_CODE_RULES.filter((r) => r.activeFrom <= clockMin);
 }
 
diff --git a/src/rules/lipRead.ts b/src/rules/lipRead.ts
new file mode 100644
index 0000000..b923850
--- /dev/null
+++ b/src/rules/lipRead.ts
@@ -0,0 +1,52 @@
+// ROOM (design §6): the techno is so loud every line at the rope is a lip-read
+// guess. Pure text transform, deterministic per (salt, word) — the same patron
+// mouths the same guess twice, because re-asking doesn't reroll reality.
+//
+// Tone guard: the comedy is the player's OWN uncertain reading, never the
+// speaker's — everyone in ROOM is perfectly articulate, you just can't hear.
+
+/** What the player's brain offers when a word is half-caught. Club-adjacent
+ * nonsense on purpose — a guess should be worse than the truth. */
+const MISHEARINGS: readonly string[] = [
+  'FIST', 'GOAT', 'CHIPS', 'NAN', 'TAX', 'DECAF', 'PILATES', 'HORSE',
+  'COUNCIL', 'SOUP', 'LADDER', 'BINS', 'SHREK', 'MULCH',
+];
+
+const LOST = '[???]';
+
+/** FNV-1a — cheap, stable, and never Math.random (CONTRACTS.md). */
+function hash(s: string): number {
+  let h = 2166136261;
+  for (let i = 0; i < s.length; i++) {
+    h ^= s.charCodeAt(i);
+    h = Math.imul(h, 16777619);
+  }
+  return h >>> 0;
+}
+
+/**
+ * `"mate im on the list"` → `"[MATE] [IM?] [ON THE?] [FIST? LIST?]"`-shaped
+ * guesses. Every token is bracketed (the brackets ARE the deafness); short
+ * words survive better than long ones; some words arrive as two competing
+ * guesses and some don't arrive at all.
+ */
+export function lipReadLine(line: string, salt: string): string {
+  const words = line.split(/\s+/).filter(Boolean);
+  const out: string[] = [];
+  for (let i = 0; i < words.length; i++) {
+    const clean = (words[i] ?? '').replace(/[^a-z0-9']/gi, '').toUpperCase();
+    if (clean.length === 0) continue;
+    const h = hash(`${salt}:${i}:${clean}`);
+    const roll = h % 100;
+    if (roll < 12) {
+      out.push(LOST);
+    } else if (roll < 28 && clean.length >= 4) {
+      out.push(`[${MISHEARINGS[h % MISHEARINGS.length]}? ${clean}?]`);
+    } else if (roll < 60) {
+      out.push(`[${clean}?]`);
+    } else {
+      out.push(`[${clean}]`);
+    }
+  }
+  return out.length > 0 ? out.join(' ') : LOST;
+}
diff --git a/src/scenes/door/DoorScene.ts b/src/scenes/door/DoorScene.ts
index c799d6c..b3887bb 100644
--- a/src/scenes/door/DoorScene.ts
+++ b/src/scenes/door/DoorScene.ts
@@ -1,7 +1,7 @@
 import Phaser from 'phaser';
 import { renderDoll } from '../../patrons/doll';
 import { dollPlan } from '../../patrons/dollPlan';
-import { activeRules, announcedRules, violations, type DoorDressCodeRule } from '../../rules/dressCode';
+import { activeRules, announcedRules, shuffleWindow, violations, type DoorDressCodeRule } from '../../rules/dressCode';
 import { drunkStage } from '../../rules/drunk';
 import { idVerdict, formatDate } from '../../rules/idCheck';
 import { LOCKOUT_MIN, judge } from '../../rules/judge';
@@ -14,6 +14,7 @@ import {
   DENY_REACTIONS,
   DOOR_TUTORIAL,
   DOOR_UI,
+  BOARD_SHUFFLE_TOASTS,
   FRANKO_TIPS,
   PATDOWN_LINES,
   RULE_RETRACTIONS,
@@ -87,6 +88,8 @@ export class DoorScene extends Phaser.Scene {
   private busy = false;
   private rulingToken = 0;
   private elapsedMs = 0;
+  /** ROOM: which 15-min shuffle window the code board currently shows. */
+  private codeWindow = -1;
   private testedThisPatron = false;
   private pattedThisPatron = false;
   private offs: Array<() => void> = [];
@@ -142,7 +145,19 @@ export class DoorScene extends Phaser.Scene {
     this.buildHud();
 
     this.offs = [
-      this.night.bus.on('clock:tick', ({ clockMin }) => this.queue.onClockMinute(clockMin)),
+      this.night.bus.on('clock:tick', ({ clockMin }) => {
+        this.queue.onClockMinute(clockMin);
+        // ROOM: the board rewrites itself on every 15-min window turn.
+        if (this.night.venue.shuffleDressCode) {
+          const w = shuffleWindow(clockMin);
+          if (w !== this.codeWindow) {
+            this.codeWindow = w;
+            this.codeCard.setAll(this, activeRules(clockMin), this.elapsedMs);
+            this.showToast(BOARD_SHUFFLE_TOASTS[w % BOARD_SHUFFLE_TOASTS.length]!);
+            this.night.sfx?.play('phoneBuzz');
+          }
+        }
+      }),
       this.night.bus.on('meters:changed', ({ vibe, aggro, hype }) => {
         this.vibeBar.set(vibe / 100, vibe < 20);
         this.aggroBar.set(aggro / 100, aggro > 80);
@@ -281,6 +296,13 @@ export class DoorScene extends Phaser.Scene {
 
     // Two panels, one footprint. The tab header sits above them both.
     this.codeCard = new DressCodeCard(this, 6, 268, 168, 86);
+    // ROOM: no Dazza chronology — the board opens already written, and the
+    // rope reads lips (PatronUpView renders every line as a guess).
+    if (this.night.venue.shuffleDressCode) {
+      this.codeWindow = shuffleWindow(this.night.state.clockMin);
+      this.codeCard.setAll(this, activeRules(this.night.state.clockMin), this.elapsedMs);
+    }
+    this.up.lipRead = this.night.venue.lipRead === true;
     this.clipboard = new ClipboardPanel(this, this.queue.guestList, 6, 268, 168, 86);
     this.buildDeskTabs();
 
diff --git a/src/scenes/door/DressCodeCard.ts b/src/scenes/door/DressCodeCard.ts
index e8e0be4..943cc0d 100644
--- a/src/scenes/door/DressCodeCard.ts
+++ b/src/scenes/door/DressCodeCard.ts
@@ -59,6 +59,17 @@ export class DressCodeCard {
     this.rows.push({ rule, label, badge, addedAt: nowMs });
   }
 
+  /** ROOM shuffle: the board rewrites itself wholesale — clear and restate. */
+  setAll(scene: Phaser.Scene, rules: readonly DoorDressCodeRule[], nowMs: number): void {
+    for (const r of this.rows) {
+      r.label.destroy();
+      r.badge.destroy();
+    }
+    this.rows.length = 0;
+    this.emptyText.setVisible(rules.length === 0);
+    for (const rule of rules) this.add(scene, rule, nowMs);
+  }
+
   /** Highlight the rules the patron currently in front of you is breaking. */
   highlight(violatedIds: readonly string[]): void {
     for (const r of this.rows) {
diff --git a/src/scenes/door/NightScene.ts b/src/scenes/door/NightScene.ts
index f120f5d..4c557b0 100644
--- a/src/scenes/door/NightScene.ts
+++ b/src/scenes/door/NightScene.ts
@@ -6,7 +6,7 @@ import { StubBeatClock } from '../../core/StubBeatClock';
 import { Meters, freshNightState, vibeCoolingPerMin } from '../../core/meters';
 import { loadGame, saveGame, clearSave, freshGameState } from '../../core/save';
 import { _resetPatronSerial } from '../../patrons/generator';
-import { ruleById } from '../../rules/dressCode';
+import { ruleById, setDressCodeShuffle } from '../../rules/dressCode';
 import { TechnoEngine } from '../../audio/TechnoEngine';
 import { Ambience } from '../../audio/Ambience';
 import { Sfx } from '../../audio/Sfx';
@@ -172,6 +172,10 @@ export class NightScene extends Phaser.Scene {
     };
     this.clock = new GameClock(this.bus, clockCfg);
     this.state = freshNightState(this.venue.id, this.nightIndex, this.venue.licensed);
+    // ROOM: the board rewrites itself every 15 min — judge(), the card and
+    // Kayden must all read the same shuffled set, so the mode lives at module
+    // level in rules/dressCode. Set (or cleared) fresh every night.
+    setDressCodeShuffle(this.venue.shuffleDressCode ? this.seed : null);
     // Heat is run-scoped: strikes from earlier nights are already on the licence.
     this.state.heatStrikes.push(...this.run.heatStrikes);
     this.meters = new Meters(this.bus, this.state);
diff --git a/src/scenes/door/PatronUpView.ts b/src/scenes/door/PatronUpView.ts
index 2d06246..f705e64 100644
--- a/src/scenes/door/PatronUpView.ts
+++ b/src/scenes/door/PatronUpView.ts
@@ -2,6 +2,7 @@ import Phaser from 'phaser';
 import { renderDoll } from '../../patrons/doll';
 import { dollPlan } from '../../patrons/dollPlan';
 import { drunkStage } from '../../rules/drunk';
+import { lipReadLine } from '../../rules/lipRead';
 import type { Patron } from '../../data/types';
 import { CLAIM_LINES, DRUNK_GREETINGS, OWNER_HINTS, PATRON_GREETINGS, REGULAR_DISGUISED_LINES, REGULAR_RETURN_LINES } from '../../data/strings/door';
 import { encounterById, type EncounterId } from '../../rules/encounters';
@@ -25,6 +26,8 @@ export class PatronUpView {
   private swayPx = 0;
   /** The bubble currently on screen. Beats REPLACE it; they do not stack. */
   private bubble: Phaser.GameObjects.GameObject[] = [];
+  /** ROOM (design §6): every line renders as a lip-read guess. Set by DoorScene. */
+  lipRead = false;
 
   constructor(
     private readonly scene: Phaser.Scene,
@@ -109,8 +112,9 @@ export class PatronUpView {
     const line = pool[greetingIndex(p, pool.length)] ?? PATRON_GREETINGS[0]!;
 
     const bubbleY = -DOLL_H * SCALE - 16;
+    // Lip-read guesses drop the quote marks — it's your reading, not their words.
     const label = scene.add
-      .text(0, bubbleY, `"${line}"`, {
+      .text(0, bubbleY, this.lipRead ? lipReadLine(line, p.id) : `"${line}"`, {
         fontFamily: MONO,
         fontSize: '8px',
         color: '#d8d0c0',
@@ -143,7 +147,7 @@ export class PatronUpView {
       this.clearBubble();
       const bubbleY = -DOLL_H * SCALE - 16;
       const label = scene.add
-        .text(0, bubbleY, `"${line}"`, {
+        .text(0, bubbleY, this.lipRead ? lipReadLine(line, this.patron.id) : `"${line}"`, {
           fontFamily: MONO,
           fontSize: '8px',
           color: '#e8dcc4',
diff --git a/tests/dressCodeShuffle.test.ts b/tests/dressCodeShuffle.test.ts
new file mode 100644
index 0000000..15e21a4
--- /dev/null
+++ b/tests/dressCodeShuffle.test.ts
@@ -0,0 +1,75 @@
+import { afterEach, describe, expect, it } from 'vitest';
+import {
+  ACTIVE_RULE_CAP,
+  DRESS_CODE_RULES,
+  SHUFFLE_EVERY_MIN,
+  SHUFFLE_RULE_COUNT,
+  activeRules,
+  announcedRules,
+  setDressCodeShuffle,
+  shuffleWindow,
+  violations,
+} from '../src/rules/dressCode';
+import { generatePatron, _resetPatronSerial } from '../src/patrons/generator';
+import { SeededRNG } from '../src/core/SeededRNG';
+
+// Module-level mode: ALWAYS clear after each test or the whole suite goes to ROOM.
+afterEach(() => setDressCodeShuffle(null));
+
+const ids = (clockMin: number): string[] => activeRules(clockMin).map((r) => r.id);
+
+describe('ROOM dress-code shuffle', () => {
+  it('windows turn every SHUFFLE_EVERY_MIN', () => {
+    expect(shuffleWindow(0)).toBe(0);
+    expect(shuffleWindow(SHUFFLE_EVERY_MIN - 1)).toBe(0);
+    expect(shuffleWindow(SHUFFLE_EVERY_MIN)).toBe(1);
+    expect(shuffleWindow(SHUFFLE_EVERY_MIN * 4 + 3)).toBe(4);
+  });
+
+  it('serves SHUFFLE_RULE_COUNT real rules, stable within a window', () => {
+    setDressCodeShuffle(4207);
+    const a = ids(0);
+    expect(a).toHaveLength(SHUFFLE_RULE_COUNT);
+    expect(SHUFFLE_RULE_COUNT).toBeLessThanOrEqual(ACTIVE_RULE_CAP);
+    for (const id of a) expect(DRESS_CODE_RULES.some((r) => r.id === id)).toBe(true);
+    // re-reading the board mid-window must not reroll it
+    expect(ids(SHUFFLE_EVERY_MIN - 1)).toEqual(a);
+  });
+
+  it('rewrites across windows and is deterministic per seed', () => {
+    setDressCodeShuffle(4207);
+    const windows = Array.from({ length: 8 }, (_, w) => ids(w * SHUFFLE_EVERY_MIN));
+    // Some consecutive pair must differ — a board that never changes isn't ROOM.
+    expect(windows.some((w, i) => i > 0 && w.join() !== windows[i - 1]!.join())).toBe(true);
+    // Same seed replays the same night.
+    setDressCodeShuffle(4207);
+    expect(ids(SHUFFLE_EVERY_MIN * 3)).toEqual(windows[3]);
+    // A different seed is a different board.
+    setDressCodeShuffle(999);
+    const other = Array.from({ length: 8 }, (_, w) => ids(w * SHUFFLE_EVERY_MIN));
+    expect(other.join('|')).not.toBe(windows.join('|'));
+  });
+
+  it('announcedRules mirrors the live set — nothing greyed, nothing historical', () => {
+    setDressCodeShuffle(4207);
+    expect(announcedRules(200).map((r) => r.id)).toEqual(ids(200));
+  });
+
+  it('clearing the mode restores the Dazza chronology', () => {
+    setDressCodeShuffle(4207);
+    setDressCodeShuffle(null);
+    expect(activeRules(0)).toEqual(DRESS_CODE_RULES.filter((r) => r.activeFrom <= 0).slice(-ACTIVE_RULE_CAP));
+  });
+
+  it('violations() judges against the shuffled set', () => {
+    _resetPatronSerial();
+    const rng = new SeededRNG(7);
+    const ctx = { rng, nightDate: new Date('2026-07-16T00:00:00') };
+    setDressCodeShuffle(4207);
+    for (let i = 0; i < 40; i++) {
+      const p = generatePatron(ctx, 30);
+      const live = new Set(ids(30));
+      for (const v of violations(p, 30)) expect(live.has(v.id)).toBe(true);
+    }
+  });
+});
diff --git a/tests/lipRead.test.ts b/tests/lipRead.test.ts
new file mode 100644
index 0000000..206b032
--- /dev/null
+++ b/tests/lipRead.test.ts
@@ -0,0 +1,38 @@
+import { describe, expect, it } from 'vitest';
+import { lipReadLine } from '../src/rules/lipRead';
+
+describe('lipReadLine', () => {
+  it('is deterministic — re-asking does not reroll reality', () => {
+    const line = 'mate im on the list i promise you im on the list';
+    expect(lipReadLine(line, 'p1')).toBe(lipReadLine(line, 'p1'));
+  });
+
+  it('different patrons hear the room differently', () => {
+    const line = 'im on the list i swear on my nan';
+    const guesses = new Set(['p1', 'p2', 'p3', 'p4', 'p5'].map((s) => lipReadLine(line, s)));
+    expect(guesses.size).toBeGreaterThan(1);
+  });
+
+  it('every token is a bracketed uppercase guess', () => {
+    const out = lipReadLine('mate the owner literally invited me', 'p9');
+    for (const tok of out.split(' ')) {
+      expect(tok.startsWith('[')).toBe(true);
+      expect(tok.endsWith(']')).toBe(true);
+      expect(tok).toBe(tok.toUpperCase());
+    }
+  });
+
+  it('shows real uncertainty across a long line — not a clean transcript', () => {
+    const out = lipReadLine(
+      'listen i know the promoter and the promoter knows the owner and honestly the whole situation is very much under control',
+      'p2',
+    );
+    expect(out).toContain('?');
+  });
+
+  it('never emits an empty guess', () => {
+    expect(lipReadLine('', 'p1')).toBe('[???]');
+    expect(lipReadLine('...', 'p1')).toBe('[???]');
+    expect(lipReadLine('*points*', 'p1').length).toBeGreaterThan(0);
+  });
+});