From b66e65e2e2a071eb29089a3ce2579a4e2b9504b4 Mon Sep 17 00:00:00 2001
From: Claude <noreply@anthropic.com>
Date: Thu, 15 Oct 2026 09:34:35 +0000
Subject: [PATCH 1/3] Mark a business as shut down, apart from owned

Biker businesses and the Bunker get a "Shut down" checkbox in their
settings. While shut down a business makes no stock and uses no supplies,
its nightclub goods count as locked, and it adds nothing to the Money
Fronts safe. Data version 10 (no-op migration: the flag is optional).
Decision 020.

Closes #38

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
---
 CLAUDE.md                                 |  1 +
 docs/decisions/015-nightclub-warehouse.md |  2 +-
 docs/decisions/018-money-fronts.md        |  5 ++-
 docs/decisions/020-shut-down.md           | 26 +++++++++++++++
 docs/decisions/README.md                  |  1 +
 src/components/BusinessProduction.svelte  | 15 +++++++--
 src/components/Businesses.svelte          | 13 +++++++-
 src/components/MoneyFrontsCard.svelte     |  4 +--
 src/components/NightclubWarehouse.svelte  |  2 +-
 src/components/PropertySettings.svelte    | 17 ++++++++--
 src/data/properties.ts                    | 15 ++++++++-
 src/lib/fronts.test.ts                    |  7 +++-
 src/lib/fronts.ts                         |  9 +++--
 src/lib/nightclub.test.ts                 | 11 ++++++-
 src/lib/nightclub.ts                      |  6 ++--
 src/lib/production.test.ts                |  9 ++++-
 src/lib/production.ts                     |  7 ++--
 src/lib/properties.test.ts                | 40 +++++++++++++++++++++++
 src/lib/properties.ts                     | 26 +++++++++++++++
 src/lib/state.test.ts                     | 40 ++++++++++++++++++-----
 src/lib/state.ts                          |  7 ++--
 21 files changed, 227 insertions(+), 36 deletions(-)
 create mode 100644 docs/decisions/020-shut-down.md

diff --git a/CLAUDE.md b/CLAUDE.md
index 3673ee7..0210bfb 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -27,6 +27,7 @@ Svelte 5 + TypeScript + Vite. Public repository.
 | Acid Lab, production boost                     | `data/production.ts`, `lib/production.ts` (017)   |
 | Money Fronts safe and heat                     | `data/fronts.ts`, `lib/fronts.ts` (018)           |
 | Value bonus for owning a front                 | `ownedBonus` in `data/production.ts` (019)        |
+| Shut-down businesses (owned, not running)      | `isRunning` in `lib/properties.ts` (020)          |
 | Theme tokens                                   | `src/app.css` (decision 009)                      |
 | CI, templates                                  | `.github/`                                        |
 | Skills: `handoff`, `finish-pr`; agent: `scout` | `.claude/`                                        |
diff --git a/docs/decisions/015-nightclub-warehouse.md b/docs/decisions/015-nightclub-warehouse.md
index 5e0f600..5b9d70c 100644
--- a/docs/decisions/015-nightclub-warehouse.md
+++ b/docs/decisions/015-nightclub-warehouse.md
@@ -15,7 +15,7 @@
 - **Only ownership is needed.** The source says technicians need no supplies, so goods do not
   depend on the linked business's stock or supplies. Goods whose business is not owned do not
   run and the card says "Locked". Two technicians on one type count once (the game allows one).
-  A shut-down business locks its goods too; marking one shut down is issue #38.
+  A shut-down business locks its goods too (decision 020).
 - **Saved state** (version 6): `nightclub` maps a goods id to crates, fractions included. Crates,
   not percent, so changing the floors keeps the count the game shows. Stock above the capacity
   (fewer floors set) stays until changed.
diff --git a/docs/decisions/018-money-fronts.md b/docs/decisions/018-money-fronts.md
index 2d8f2dd..00e3960 100644
--- a/docs/decisions/018-money-fronts.md
+++ b/docs/decisions/018-money-fronts.md
@@ -16,9 +16,8 @@
 - **Payout** (`src/data/fronts.ts`), every in-game day (48 minutes of play time), up to
   $100,000: $750 per front ($1,500 after 15 laundering missions) plus a fixed amount for each
   other business owned, from the in-game safe screen (data comment has the sources). A front at
-  100% heat pays nothing; the Car Wash at 100% stops the whole safe. LSOS counts every owned
-  business; the game skips biker businesses and the Bunker while shut down or not set up, which
-  the card says (shutting down: issue #38).
+  100% heat pays nothing; the Car Wash at 100% stops the whole safe. A shut-down business
+  adds nothing (decision 020); one bought but not set up still counts in LSOS.
 - **Heat** per front, saved with the safe (`heat` by front id, data version 9). At the end of
   each day, after the payout, every front below 100% gains 10%, one less per other front below
   100% (8% with all three). A laundering mission or Mr. Faber job adds 10% to the front it was
diff --git a/docs/decisions/020-shut-down.md b/docs/decisions/020-shut-down.md
new file mode 100644
index 0000000..2e9de6d
--- /dev/null
+++ b/docs/decisions/020-shut-down.md
@@ -0,0 +1,26 @@
+# 020: Shut-down businesses
+
+2026-10-15, issue #38. Builds on decisions 011, 012, 015 and 018.
+
+## Decision
+
+- **A flag apart from owned:** `shutDown` in a property's saved settings, next to `owned` and
+  the upgrades (data version 10). Absent means running, so older entries need no change. Owning
+  or selling keeps it, like the upgrades.
+- **Only businesses the game can shut down** get the "Shut down" checkbox (`canShutDown` in
+  `src/data/properties.ts`): the five biker businesses and the Bunker, the ones decision 018
+  names. The Acid Lab is left out: no source says it can be shut down.
+- **Shut down means "not running" everywhere** (`isRunning` in `lib/properties.ts`):
+  - production (decision 012) makes no stock and uses no supplies; the card shows the bars and
+    value as they are, says "Shut down", and hides the countdowns and the boost;
+  - nightclub goods (decision 015) whose only unlocking business is shut down count as locked,
+    so the Locked note and the best-setup suggestion follow;
+  - the Money Fronts safe (decision 018) gets nothing from it.
+- **Not modelled:** whether a nightclub technician must be reassigned after the business starts
+  again. LSOS keeps the assignment and resumes counting.
+
+## Why
+
+Marking a shut-down business "Not owned" hid its stock and lost the card. The flag keeps both.
+gta.wiki does not describe shutting down from the laptop (checked 2026-10-15); the nightclub
+and Money Fronts rules rest on the sources in decisions 015 and 018 and the issue.
diff --git a/docs/decisions/README.md b/docs/decisions/README.md
index 06c64ca..3152f2f 100644
--- a/docs/decisions/README.md
+++ b/docs/decisions/README.md
@@ -30,3 +30,4 @@ free number, add one line below. **Replacing one:** write a new decision, then m
 - [017](017-production-boost.md) Acid Lab: optional far sale, value bonus (named product), no raids; production boost by units made or 24 real hours, once a day
 - [018](018-money-fronts.md) Money Fronts: one Car Wash safe card on the Safes tab, paid by the fronts and other businesses, heat per front (est.), missions and legal jobs
 - [019](019-owned-value-bonus.md) Money Front value bonus: owning Car Wash or Smoke on the Water adds 35% to Counterfeit Cash or Weed, far value adds the bonuses (est.), Helitours left out
+- [020](020-shut-down.md) Shut-down businesses: a flag apart from owned for biker businesses and the Bunker; no production, nightclub goods locked, nothing to the Money Fronts safe
diff --git a/src/components/BusinessProduction.svelte b/src/components/BusinessProduction.svelte
index a269662..0b4f002 100644
--- a/src/components/BusinessProduction.svelte
+++ b/src/components/BusinessProduction.svelte
@@ -27,6 +27,8 @@
     rate: ProductionRate | undefined
     /** The same rate if it can run on its own (its supply use is known). */
     running: KnownRate | undefined
+    /** Shut down from its laptop: nothing is made or used until it runs again (issue #38). */
+    shutDown?: boolean
     bars: Bars
     /** Wall-clock time, for supply deliveries. */
     now: number
@@ -47,6 +49,7 @@
     production,
     rate,
     running,
+    shutDown = false,
     bars,
     now,
     editing,
@@ -71,7 +74,9 @@
   const boosting = $derived(boostRunning(boost, production.boost, now))
   const nextBoost = $derived(production.boost ? nextBoostAt(boost, production.boost) : 0)
   const ahead = $derived(
-    running ? forecast(current, production, running, boosting ? boost!.unitsLeft : 0) : null,
+    running && !shutDown
+      ? forecast(current, production, running, boosting ? boost!.unitsLeft : 0)
+      : null,
   )
   const percent = (value: number) => formatValue(value, 'percent')
   // Numbers resting on estimated rates say so (decision 013). The value also counts units made
@@ -115,7 +120,7 @@
   </div>
 {/if}
 
-{#if production.boost && running?.boostedMinutesPerUnit !== undefined}
+{#if production.boost && running?.boostedMinutesPerUnit !== undefined && !shutDown}
   <!-- Play time while it runs; the next one is a real-time wait (daily reset). -->
   <div class="facts">
     {#if boosting}
@@ -137,7 +142,11 @@
   {/if}
 {/if}
 
-{#if ahead}
+{#if shutDown}
+  <p class="note" role="note">
+    <strong>Shut down.</strong> No stock is made and no supplies are used until you start it again.
+  </p>
+{:else if ahead}
   <!-- Only what happens first: the other one cannot happen before it. Play time. -->
   {#if ahead.fullInMs !== null}
     <Countdown
diff --git a/src/components/Businesses.svelte b/src/components/Businesses.svelte
index 1ab5bca..ebc4bbd 100644
--- a/src/components/Businesses.svelte
+++ b/src/components/Businesses.svelte
@@ -21,7 +21,12 @@
     type BoostsById,
     type BusinessBarsById,
   } from '../lib/production'
-  import { ownedProperties, upgradeValue, type OwnedProperties } from '../lib/properties'
+  import {
+    isShutDown,
+    ownedProperties,
+    upgradeValue,
+    type OwnedProperties,
+  } from '../lib/properties'
   import type { GoodsStock } from '../lib/nightclub'
   import type { Bars } from '../lib/resync'
   import { hashForTab } from '../lib/tabs'
@@ -205,6 +210,11 @@
 
   /** Short summary of the bought upgrades, e.g. "Equipment, Technician: Cash". */
   function summary(property: Property): string {
+    const shutDown = isShutDown(owned, property.id) ? 'Shut down · ' : ''
+    return shutDown + upgradeSummary(property)
+  }
+
+  function upgradeSummary(property: Property): string {
     const parts = property.upgrades.flatMap((upgrade) => {
       const value = upgradeValue(owned, property.id, upgrade)
       if (upgrade.kind === 'toggle') return value === true ? [upgrade.label] : []
@@ -251,6 +261,7 @@
                 {production}
                 rate={matchingRate(production, owned, property)}
                 running={rateFor(production, owned, property)}
+                shutDown={isShutDown(owned, property.id)}
                 bars={businesses[property.id] ?? emptyBars()}
                 {now}
                 editing={editing === property.id}
diff --git a/src/components/MoneyFrontsCard.svelte b/src/components/MoneyFrontsCard.svelte
index 900e2a3..71858ec 100644
--- a/src/components/MoneyFrontsCard.svelte
+++ b/src/components/MoneyFrontsCard.svelte
@@ -131,8 +131,8 @@
   <span class="value">{money(parts.fronts + parts.others)} a day</span>
 </div>
 <p class="hint">
-  Fronts {money(parts.fronts)} + your other businesses {money(parts.others)}. Biker businesses and
-  the Bunker only count while set up and not shut down.
+  Fronts {money(parts.fronts)} + your other businesses {money(parts.others)}. A shut-down business
+  adds nothing.
 </p>
 
 <Countdown label="Next payout in" remainingMs={nextPayoutInMs(current)} />
diff --git a/src/components/NightclubWarehouse.svelte b/src/components/NightclubWarehouse.svelte
index d0a4a6d..1683bfc 100644
--- a/src/components/NightclubWarehouse.svelte
+++ b/src/components/NightclubWarehouse.svelte
@@ -160,7 +160,7 @@
   <p class="note" role="note">
     <strong>Locked.</strong>
     {locked.map((g) => g.label).join(', ')}: own the business that makes
-    {locked.length === 1 ? 'it' : 'them'} to start production.
+    {locked.length === 1 ? 'it' : 'them'}, and keep it running, to start production.
   </p>
 {/if}
 {#if setup.doubled}
diff --git a/src/components/PropertySettings.svelte b/src/components/PropertySettings.svelte
index e4d2ac5..c86dfb0 100644
--- a/src/components/PropertySettings.svelte
+++ b/src/components/PropertySettings.svelte
@@ -1,11 +1,13 @@
 <script lang="ts">
-  // Owned yes/no and the upgrades of one property (decision 011).
+  // Owned yes/no, shut down (issue #38) and the upgrades of one property (decision 011).
   import type { Property } from '../data/properties'
   import Button from './ui/Button.svelte'
   import NumberField from './ui/NumberField.svelte'
   import {
     isOwned,
+    isShutDown,
     setOwned,
+    setShutDown,
     setUpgrade,
     upgradeValue,
     type OwnedProperties,
@@ -35,8 +37,19 @@
     </Button>
   </div>
 
-  {#if isPropertyOwned && property.upgrades.length > 0}
+  {#if isPropertyOwned && (property.upgrades.length > 0 || property.canShutDown)}
     <div class="upgrades">
+      {#if property.canShutDown}
+        <label>
+          <input
+            type="checkbox"
+            checked={isShutDown(owned, property.id)}
+            onchange={(event) =>
+              onchange(setShutDown(owned, property.id, event.currentTarget.checked))}
+          />
+          Shut down
+        </label>
+      {/if}
       {#each property.upgrades as upgrade (upgrade.id)}
         {#if upgrade.kind === 'toggle'}
           <label>
diff --git a/src/data/properties.ts b/src/data/properties.ts
index 886d994..2d8ffdc 100644
--- a/src/data/properties.ts
+++ b/src/data/properties.ts
@@ -32,6 +32,11 @@ export interface Property {
    * elsewhere, or that only have a safe (Safes tab).
    */
   card?: false
+  /**
+   * True for businesses the game lets you shut down from their laptop: they stay owned but make
+   * nothing (issue #38).
+   */
+  canShutDown?: true
   source: string
   checked: string
 }
@@ -73,6 +78,7 @@ export const PROPERTIES: readonly Property[] = [
     id: 'bunker',
     label: 'Bunker',
     upgrades: PRODUCTION_UPGRADES,
+    canShutDown: true,
     source: BUNKER_SOURCE,
     checked: '2026-10-14',
   },
@@ -232,5 +238,12 @@ export const PROPERTIES: readonly Property[] = [
 ]
 
 function mc(id: string, label: string): Property {
-  return { id, label, upgrades: PRODUCTION_UPGRADES, source: MC_SOURCE, checked: '2026-10-14' }
+  return {
+    id,
+    label,
+    upgrades: PRODUCTION_UPGRADES,
+    canShutDown: true,
+    source: MC_SOURCE,
+    checked: '2026-10-14',
+  }
 }
diff --git a/src/lib/fronts.test.ts b/src/lib/fronts.test.ts
index 3ac7eb7..6ab0fcb 100644
--- a/src/lib/fronts.test.ts
+++ b/src/lib/fronts.test.ts
@@ -15,7 +15,7 @@ import {
   setHeat,
   syncFronts,
 } from './fronts'
-import type { OwnedProperties, UpgradeValue } from './properties'
+import { setShutDown, type OwnedProperties, type UpgradeValue } from './properties'
 import { DAY_MS, type SafeState } from './safes'
 
 const MIN = 60_000
@@ -74,6 +74,11 @@ describe('payoutParts', () => {
     expect(payoutParts(emptyFronts(), large, PROPERTIES).others).toBe(1_500)
   })
 
+  it('leaves out a shut-down business (issue #38)', () => {
+    const owned = setShutDown(owning(['car-wash', 'bunker', 'mc-weed']), 'bunker', true)
+    expect(payoutParts(emptyFronts(), owned, PROPERTIES)).toEqual({ fronts: 750, others: 1_000 })
+  })
+
   it('drops a front at 100% heat, and everything when the car wash is at 100%', () => {
     const owned = owning([...ALL_FRONTS, 'bunker'])
     expect(dailyPayout(safe(0, { helitours: 100 }), owned, PROPERTIES)).toBe(1_500 + 1_500)
diff --git a/src/lib/fronts.ts b/src/lib/fronts.ts
index 0a5e0b8..e1fd868 100644
--- a/src/lib/fronts.ts
+++ b/src/lib/fronts.ts
@@ -15,7 +15,7 @@ import {
   type Front,
 } from '../data/fronts'
 import type { Property } from '../data/properties'
-import { isOwned, setUpgrade, upgradeValue, type OwnedProperties } from './properties'
+import { isOwned, isRunning, setUpgrade, upgradeValue, type OwnedProperties } from './properties'
 import { DAY_MS, nextPayoutInMs, type SafeState } from './safes'
 
 /** The heat a front is stopped at: no pay from it, and none at all from the Car Wash. */
@@ -48,10 +48,13 @@ export function frontPay(front: Front, owned: OwnedProperties, catalog: readonly
     : front.amount
 }
 
-/** What the other businesses owned add per day; the warehouse counts by its largest size. */
+/**
+ * What the other businesses owned add per day; the warehouse counts by its largest size. A
+ * shut-down business adds nothing (issue #38).
+ */
 export function sharesPay(owned: OwnedProperties, catalog: readonly Property[]): number {
   let total = 0
-  for (const share of SHARES) if (isOwned(owned, share.propertyId)) total += share.amount
+  for (const share of SHARES) if (isRunning(owned, share.propertyId)) total += share.amount
   const warehouse = catalog.find((p) => p.id === 'special-cargo')
   const size = warehouse?.upgrades.find((u) => u.id === WAREHOUSE_SIZE_UPGRADE)
   if (warehouse && size && isOwned(owned, warehouse.id)) {
diff --git a/src/lib/nightclub.test.ts b/src/lib/nightclub.test.ts
index a14f0c1..ba078cf 100644
--- a/src/lib/nightclub.test.ts
+++ b/src/lib/nightclub.test.ts
@@ -14,7 +14,7 @@ import {
   warehouseSetup,
   wholeCrates,
 } from './nightclub'
-import type { OwnedProperties, UpgradeValue } from './properties'
+import { setShutDown, type OwnedProperties, type UpgradeValue } from './properties'
 
 const MIN = 60_000
 const nightclub = PROPERTIES.find((p) => p.id === NIGHTCLUB_ID)!
@@ -108,6 +108,15 @@ describe('produceGoods', () => {
     expect(produceGoods(stock, GOODS, PROPERTIES, sold, 60 * MIN)).toBe(stock)
   })
 
+  it('locks goods while their only business is shut down (issue #38)', () => {
+    const stock = {}
+    const shut = setShutDown(owned, 'mc-cash', true)
+    expect(produceGoods(stock, GOODS, PROPERTIES, shut, 60 * MIN)).toBe(stock)
+    const viaWarehouse = owning({ 'technician-1': 'cargo' }, ['hangar', 'special-cargo'])
+    const hangarShut = setShutDown(viaWarehouse, 'hangar', true)
+    expect(produceGoods({}, GOODS, PROPERTIES, hangarShut, 140 * MIN)).toEqual({ cargo: 1 })
+  })
+
   it('unlocks cargo with either the hangar or the special cargo warehouse', () => {
     const viaHangar = owning({ 'technician-1': 'cargo' }, ['hangar'])
     expect(produceGoods({}, GOODS, PROPERTIES, viaHangar, 140 * MIN)).toEqual({ cargo: 1 })
diff --git a/src/lib/nightclub.ts b/src/lib/nightclub.ts
index 8b057d1..00518e5 100644
--- a/src/lib/nightclub.ts
+++ b/src/lib/nightclub.ts
@@ -2,7 +2,7 @@
 // Pure logic: play time comes in as an argument (decision 003).
 import { MAX_TECHNICIANS, NIGHTCLUB_ID, type Goods } from '../data/nightclub'
 import type { Property } from '../data/properties'
-import { isOwned, upgradeValue, type OwnedProperties } from './properties'
+import { isOwned, isRunning, upgradeValue, type OwnedProperties } from './properties'
 
 const MINUTE_MS = 60_000
 
@@ -52,9 +52,9 @@ export function msPerCrate(goods: Goods, equipment: boolean): number {
   return (equipment ? goods.minutesPerCrate.equipment : goods.minutesPerCrate.base) * MINUTE_MS
 }
 
-/** Whether the user owns a business that unlocks these goods. */
+/** Whether a business that unlocks these goods is owned and not shut down (issue #38). */
 export function isUnlocked(goods: Goods, owned: OwnedProperties): boolean {
-  return goods.requires.some((id) => isOwned(owned, id))
+  return goods.requires.some((id) => isRunning(owned, id))
 }
 
 /** Whether these goods are being made: a technician is on them and they are unlocked. */
diff --git a/src/lib/production.test.ts b/src/lib/production.test.ts
index ca11245..b7a23c3 100644
--- a/src/lib/production.test.ts
+++ b/src/lib/production.test.ts
@@ -19,7 +19,7 @@ import {
   type Boost,
   type KnownRate,
 } from './production'
-import type { OwnedProperties } from './properties'
+import { setShutDown, type OwnedProperties } from './properties'
 import type { Bars } from './resync'
 
 const MIN = 60_000
@@ -244,6 +244,13 @@ describe('produceAll', () => {
     expect(next).toEqual({ ...businesses, bunker: { stock: 1, supplies: 95 } })
   })
 
+  it('keeps a shut-down business as it is (issue #38)', () => {
+    const businesses = { bunker: { stock: 0, supplies: 100 } }
+    const shut = setShutDown(owned, 'bunker', true)
+    const next = produceAll(businesses, PROPERTIES, PRODUCTION, shut, 7 * MIN, 0, 100)
+    expect(next.businesses).toBe(businesses)
+  })
+
   it('returns the same object when nothing changed', () => {
     const businesses = { bunker: { stock: 50, supplies: 0 } }
     const next = produceAll(businesses, PROPERTIES, PRODUCTION, owned, 7 * MIN, 0, 100)
diff --git a/src/lib/production.ts b/src/lib/production.ts
index 242d6c2..a2a8ace 100644
--- a/src/lib/production.ts
+++ b/src/lib/production.ts
@@ -2,7 +2,7 @@
 // Pure logic: play time and wall-clock time come in as arguments (decision 003).
 import type { Production, ProductionBoost, ProductionRate } from '../data/production'
 import type { Property } from '../data/properties'
-import { isOwned, upgradeValue, type OwnedProperties } from './properties'
+import { isOwned, isRunning, upgradeValue, type OwnedProperties } from './properties'
 import { settleBars, type Bars } from './resync'
 
 /** A rate with everything needed to run production on its own. */
@@ -262,7 +262,8 @@ function step(
 }
 
 /**
- * Counts a stretch of play time for every owned business with a known rate. The stretch is
+ * Counts a stretch of play time for every running business with a known rate: a shut-down one
+ * keeps its bars as they are (issue #38). The stretch is
  * taken to end at `now` (wall clock), which is exact for normal ticks: supplies bought that
  * arrived during it count from their arrival, and a boost runs from its start to its end.
  * Returns `businesses` and `boosts` themselves if nothing changed, so an idle tick does not
@@ -281,7 +282,7 @@ export function produceAll(
   let next = { businesses, boosts }
   for (const production of productions) {
     const property = catalog.find((p) => p.id === production.propertyId)
-    if (!property || !isOwned(owned, property.id)) continue
+    if (!property || !isRunning(owned, property.id)) continue
     const rate = rateFor(production, owned, property)
     if (!rate) continue
     const id = property.id
diff --git a/src/lib/properties.test.ts b/src/lib/properties.test.ts
index 7a788a5..6fc183c 100644
--- a/src/lib/properties.test.ts
+++ b/src/lib/properties.test.ts
@@ -2,9 +2,12 @@ import { describe, expect, it } from 'vitest'
 import type { Property, Upgrade } from '../data/properties'
 import {
   isOwned,
+  isRunning,
+  isShutDown,
   ownedProperties,
   parseOwnedProperties,
   setOwned,
+  setShutDown,
   setUpgrade,
   upgradeValue,
   type OwnedProperties,
@@ -113,3 +116,40 @@ describe('parseOwnedProperties', () => {
     expect(parseOwnedProperties(data)).toContain(message)
   })
 })
+
+describe('shutting down', () => {
+  it('runs an owned property by default', () => {
+    const owned = setOwned({}, 'a', true)
+    expect(isShutDown(owned, 'a')).toBe(false)
+    expect(isRunning(owned, 'a')).toBe(true)
+    expect(isRunning(owned, 'b')).toBe(false)
+  })
+
+  it('keeps a shut-down property owned and its upgrades', () => {
+    const owned = setShutDown(
+      setUpgrade(setOwned({}, 'a', true), 'a', 'equipment', true),
+      'a',
+      true,
+    )
+    expect(isOwned(owned, 'a')).toBe(true)
+    expect(isRunning(owned, 'a')).toBe(false)
+    expect(upgradeValue(owned, 'a', toggle)).toBe(true)
+    expect(isRunning(setShutDown(owned, 'a', false), 'a')).toBe(true)
+  })
+
+  it('keeps the flag when ownership changes', () => {
+    const owned = setOwned(setShutDown(setOwned({}, 'a', true), 'a', true), 'a', false)
+    expect(isShutDown(setOwned(owned, 'a', true), 'a')).toBe(true)
+  })
+
+  it('reads a saved flag and rejects a bad one', () => {
+    const saved = { a: { owned: true, upgrades: {}, shutDown: true } }
+    expect(parseOwnedProperties(saved)).toEqual(saved)
+    expect(parseOwnedProperties({ a: { owned: true, upgrades: {} } })).toEqual({
+      a: { owned: true, upgrades: {} },
+    })
+    expect(parseOwnedProperties({ a: { owned: true, upgrades: {}, shutDown: 'yes' } })).toBe(
+      'The saved shut-down setting of property "a" is not true or false.',
+    )
+  })
+})
diff --git a/src/lib/properties.ts b/src/lib/properties.ts
index bfc4eaa..3e59ea2 100644
--- a/src/lib/properties.ts
+++ b/src/lib/properties.ts
@@ -10,6 +10,8 @@ export type UpgradeValue = boolean | string | number
 export interface PropertySettings {
   owned: boolean
   upgrades: Record<string, UpgradeValue>
+  /** Shut down from its laptop: owned, but it makes nothing (issue #38). Absent means running. */
+  shutDown?: boolean
 }
 
 /** Settings by property id. A property without an entry is not owned and has no upgrades. */
@@ -19,6 +21,16 @@ export function isOwned(owned: OwnedProperties, propertyId: string): boolean {
   return owned[propertyId]?.owned ?? false
 }
 
+/** Whether the property is marked shut down. Only a property that can be shut down is marked. */
+export function isShutDown(owned: OwnedProperties, propertyId: string): boolean {
+  return owned[propertyId]?.shutDown ?? false
+}
+
+/** Owned and not shut down: what makes a business produce and count for others (issue #38). */
+export function isRunning(owned: OwnedProperties, propertyId: string): boolean {
+  return isOwned(owned, propertyId) && !isShutDown(owned, propertyId)
+}
+
 /** The properties of `catalog` the user owns, in catalog order. */
 export function ownedProperties(
   catalog: readonly Property[],
@@ -60,6 +72,16 @@ export function setOwned(
   return { ...owned, [propertyId]: { upgrades: {}, ...owned[propertyId], owned: value } }
 }
 
+/** Marks a business shut down or running. Kept apart from owned, like the upgrades. */
+export function setShutDown(
+  owned: OwnedProperties,
+  propertyId: string,
+  value: boolean,
+): OwnedProperties {
+  const current = owned[propertyId] ?? { owned: false, upgrades: {} }
+  return { ...owned, [propertyId]: { ...current, shutDown: value } }
+}
+
 export function setUpgrade(
   owned: OwnedProperties,
   propertyId: string,
@@ -93,7 +115,11 @@ export function parseOwnedProperties(data: unknown): OwnedProperties | string {
       }
       upgrades[upgradeId] = value as UpgradeValue
     }
+    if (entry.shutDown !== undefined && typeof entry.shutDown !== 'boolean') {
+      return `The saved shut-down setting of property "${id}" is not true or false.`
+    }
     result[id] = { owned: entry.owned, upgrades }
+    if (entry.shutDown !== undefined) result[id].shutDown = entry.shutDown
   }
   return result
 }
diff --git a/src/lib/state.test.ts b/src/lib/state.test.ts
index 9465fcc..30c5e47 100644
--- a/src/lib/state.test.ts
+++ b/src/lib/state.test.ts
@@ -25,7 +25,7 @@ describe('parseState', () => {
     expect(result).toEqual({
       ok: true,
       state: {
-        version: 9,
+        version: 10,
         clock: { trackOnOpen: false },
         properties: {},
         businesses: {},
@@ -43,7 +43,7 @@ describe('parseState', () => {
     expect(result).toEqual({
       ok: true,
       state: {
-        version: 9,
+        version: 10,
         clock: { trackOnOpen: true },
         properties: {},
         businesses: {},
@@ -64,7 +64,7 @@ describe('parseState', () => {
     expect(result).toEqual({
       ok: true,
       state: {
-        version: 9,
+        version: 10,
         clock: { trackOnOpen: false },
         properties,
         businesses: {},
@@ -86,7 +86,7 @@ describe('parseState', () => {
     expect(result).toEqual({
       ok: true,
       state: {
-        version: 9,
+        version: 10,
         clock: { trackOnOpen: true },
         properties,
         businesses,
@@ -110,7 +110,7 @@ describe('parseState', () => {
     }
     expect(parseState(JSON.stringify(sample))).toEqual({
       ok: true,
-      state: { ...sample, version: 9, nightclub: {}, safes: {}, boosts: {} },
+      state: { ...sample, version: 10, nightclub: {}, safes: {}, boosts: {} },
       fromVersion: 5,
     })
   })
@@ -126,7 +126,7 @@ describe('parseState', () => {
     }
     expect(parseState(JSON.stringify(sample))).toEqual({
       ok: true,
-      state: { ...sample, version: 9, safes: {}, boosts: {} },
+      state: { ...sample, version: 10, safes: {}, boosts: {} },
       fromVersion: 6,
     })
   })
@@ -143,7 +143,7 @@ describe('parseState', () => {
     }
     expect(parseState(JSON.stringify(sample))).toEqual({
       ok: true,
-      state: { ...sample, version: 9, boosts: {} },
+      state: { ...sample, version: 10, boosts: {} },
       fromVersion: 7,
     })
   })
@@ -161,11 +161,35 @@ describe('parseState', () => {
     }
     expect(parseState(JSON.stringify(sample))).toEqual({
       ok: true,
-      state: { ...sample, version: 9 },
+      state: { ...sample, version: 10 },
       fromVersion: 8,
     })
   })
 
+  it('migrates a version 9 sample, keeping its properties as running', () => {
+    const sample = {
+      version: 9,
+      clock: { trackOnOpen: false },
+      properties: { 'mc-weed': { owned: true, upgrades: { equipment: true } } },
+      businesses: {},
+      businessOrder: [],
+      nightclub: {},
+      safes: {},
+      boosts: {},
+    }
+    expect(parseState(JSON.stringify(sample))).toEqual({
+      ok: true,
+      state: { ...sample, version: 10 },
+      fromVersion: 9,
+    })
+  })
+
+  it('keeps a saved shut-down flag', () => {
+    const properties = { 'mc-weed': { owned: true, upgrades: {}, shutDown: true } }
+    const text = JSON.stringify({ ...defaultState(), properties })
+    expect(parseState(text)).toMatchObject({ ok: true, state: { properties } })
+  })
+
   it('keeps saved Money Fronts heat', () => {
     const safes = { 'car-wash': { money: 9_000, sinceMs: 0, heat: { 'car-wash': 30 } } }
     const text = JSON.stringify({ ...defaultState(), safes })
diff --git a/src/lib/state.ts b/src/lib/state.ts
index 9a7f704..3b040d9 100644
--- a/src/lib/state.ts
+++ b/src/lib/state.ts
@@ -12,14 +12,14 @@ import { parseOwnedProperties, type OwnedProperties } from './properties'
 import { parseSafes, type SafesById } from './safes'
 
 /** Bump when the stored shape changes, and add a migration from the previous version. */
-export const CURRENT_VERSION = 9
+export const CURRENT_VERSION = 10
 
 /** All user state. Trackers add their own sections here as they are built. */
 export interface AppState {
   version: typeof CURRENT_VERSION
   /** Clock settings (decision 008). Play time itself lasts one session and is not saved. */
   clock: ClockSettings
-  /** Owned properties and their upgrades (decision 011). */
+  /** Owned properties, their upgrades and whether they are shut down (decision 011). */
   properties: OwnedProperties
   /** Stock and supplies of each business, as of the last play time counted (issue #6). */
   businesses: BusinessBarsById
@@ -70,6 +70,9 @@ export const MIGRATIONS: Readonly<Record<number, Migration>> = {
   // Version 9 adds heat per Money Front to the car wash safe (issue #11); nothing to change, but
   // an older LSOS would drop the heat, so it must not read this data.
   8: (data) => ({ ...data }),
+  // Version 10 adds a shut-down flag per owned business (issue #38); nothing is shut down yet,
+  // but an older LSOS would drop the flag, so it must not read this data.
+  9: (data) => ({ ...data }),
 }
 
 export type ParseResult =

From ac11186a17a232c180cc6afd82a5d638606b25c3 Mon Sep 17 00:00:00 2001
From: Claude <noreply@anthropic.com>
Date: Thu, 15 Oct 2026 09:44:37 +0000
Subject: [PATCH 2/3] Shut down: clear stock, grey card, button next to Owned

Shutting a business down empties its stock and keeps its supplies. A
shut-down card is greyed out with a grey note instead of the yellow one.
The "Shut down" checkbox becomes a Running/Shut down button next to
Owned. The Settings page puts Properties across the full width in
columns, below Clock and Backup.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
---
 docs/decisions/011-owned-properties.md   |  4 +-
 docs/decisions/020-shut-down.md          | 16 +++++---
 docs/decisions/README.md                 |  2 +-
 src/App.svelte                           |  6 +--
 src/components/BusinessProduction.svelte |  6 ++-
 src/components/Businesses.svelte         | 12 +++---
 src/components/PropertyList.svelte       | 19 ++++++---
 src/components/PropertySettings.svelte   | 51 ++++++++++++++----------
 src/components/Settings.svelte           | 18 +++++----
 src/lib/production.test.ts               | 20 ++++++++++
 src/lib/production.ts                    | 20 +++++++++-
 src/lib/store.svelte.ts                  | 12 +++++-
 12 files changed, 136 insertions(+), 50 deletions(-)

diff --git a/docs/decisions/011-owned-properties.md b/docs/decisions/011-owned-properties.md
index be44f3f..dc4a0d5 100644
--- a/docs/decisions/011-owned-properties.md
+++ b/docs/decisions/011-owned-properties.md
@@ -18,7 +18,9 @@
 - **UI:** Settings has a Properties panel with every catalog entry: the name as the row label and
   a toggle button next to it, "Owned" (accent, filled) or "Not owned" (muted, outlined), with
   `aria-pressed` and the name as its accessible label, so the state reads at a glance (issue
-  #31; it replaced an "Own <name>" checkbox). Upgrades appear once owned. The Businesses tab shows only owned properties, each panel with a gear
+  #31; it replaced an "Own <name>" checkbox). Upgrades appear once owned. The panel spans the
+  page below Clock and Backup, with the properties in as many columns as fit (issue #38). The
+  Businesses tab shows only owned properties, each panel with a gear
   button that opens the same settings in place; closed, it summarises the bought upgrades.
   Both components take the catalog as a prop, so `#/kit` previews them with sample entries.
 
diff --git a/docs/decisions/020-shut-down.md b/docs/decisions/020-shut-down.md
index 2e9de6d..c6d445d 100644
--- a/docs/decisions/020-shut-down.md
+++ b/docs/decisions/020-shut-down.md
@@ -7,12 +7,18 @@
 - **A flag apart from owned:** `shutDown` in a property's saved settings, next to `owned` and
   the upgrades (data version 10). Absent means running, so older entries need no change. Owning
   or selling keeps it, like the upgrades.
-- **Only businesses the game can shut down** get the "Shut down" checkbox (`canShutDown` in
-  `src/data/properties.ts`): the five biker businesses and the Bunker, the ones decision 018
-  names. The Acid Lab is left out: no source says it can be shut down.
+- **Only businesses the game can shut down** get a "Running"/"Shut down" toggle button next to
+  "Owned", shown while owned (`canShutDown` in `src/data/properties.ts`): the five biker
+  businesses and the Bunker, the ones decision 018 names. The Acid Lab is left out: no source
+  says it can be shut down. A button like "Owned", not an upgrade checkbox: it is a state of the
+  business, not something bought.
+- **Shutting down empties the stock and keeps the supplies** (checked in game, 2026-10-15):
+  `clearShutDownStock` in `lib/production.ts`, applied by `setProperties` in the store whenever a
+  business goes from running to shut down. Starting it again changes nothing.
 - **Shut down means "not running" everywhere** (`isRunning` in `lib/properties.ts`):
-  - production (decision 012) makes no stock and uses no supplies; the card shows the bars and
-    value as they are, says "Shut down", and hides the countdowns and the boost;
+  - production (decision 012) makes no stock and uses no supplies; the card is greyed out but
+    readable, keeps its bars and value, has a grey "Shut down" note (not the yellow warning),
+    and hides the countdowns and the boost;
   - nightclub goods (decision 015) whose only unlocking business is shut down count as locked,
     so the Locked note and the best-setup suggestion follow;
   - the Money Fronts safe (decision 018) gets nothing from it.
diff --git a/docs/decisions/README.md b/docs/decisions/README.md
index 3152f2f..2046958 100644
--- a/docs/decisions/README.md
+++ b/docs/decisions/README.md
@@ -30,4 +30,4 @@ free number, add one line below. **Replacing one:** write a new decision, then m
 - [017](017-production-boost.md) Acid Lab: optional far sale, value bonus (named product), no raids; production boost by units made or 24 real hours, once a day
 - [018](018-money-fronts.md) Money Fronts: one Car Wash safe card on the Safes tab, paid by the fronts and other businesses, heat per front (est.), missions and legal jobs
 - [019](019-owned-value-bonus.md) Money Front value bonus: owning Car Wash or Smoke on the Water adds 35% to Counterfeit Cash or Weed, far value adds the bonuses (est.), Helitours left out
-- [020](020-shut-down.md) Shut-down businesses: a flag apart from owned for biker businesses and the Bunker; no production, nightclub goods locked, nothing to the Money Fronts safe
+- [020](020-shut-down.md) Shut-down businesses: a Running/Shut down button next to Owned for biker businesses and the Bunker; shutting down clears the stock; no production, card greyed, nightclub goods locked, nothing to the Money Fronts safe
diff --git a/src/App.svelte b/src/App.svelte
index 1f11a22..cfd201c 100644
--- a/src/App.svelte
+++ b/src/App.svelte
@@ -13,7 +13,7 @@
   import { clocks } from './lib/clock.svelte'
   import './lib/production.svelte'
   import './lib/safes.svelte'
-  import { store } from './lib/store.svelte'
+  import { setProperties, store } from './lib/store.svelte'
   import { TABS, tabFromHash } from './lib/tabs'
 
   let hash = $state(location.hash)
@@ -51,7 +51,7 @@
         <Businesses
           catalog={PROPERTIES}
           owned={store.state.properties}
-          onchange={(owned) => (store.state.properties = owned)}
+          onchange={setProperties}
           productions={PRODUCTION}
           businesses={store.state.businesses}
           now={clocks.now}
@@ -74,7 +74,7 @@
           safes={SAFES}
           catalog={PROPERTIES}
           owned={store.state.properties}
-          onchange={(owned) => (store.state.properties = owned)}
+          onchange={setProperties}
           stored={store.state.safes}
           onresync={(id, safe) => (store.state.safes = { ...store.state.safes, [id]: safe })}
         />
diff --git a/src/components/BusinessProduction.svelte b/src/components/BusinessProduction.svelte
index 0b4f002..443252c 100644
--- a/src/components/BusinessProduction.svelte
+++ b/src/components/BusinessProduction.svelte
@@ -143,7 +143,7 @@
 {/if}
 
 {#if shutDown}
-  <p class="note" role="note">
+  <p class="note quiet" role="note">
     <strong>Shut down.</strong> No stock is made and no supplies are used until you start it again.
   </p>
 {:else if ahead}
@@ -212,6 +212,10 @@
     padding-left: var(--space-2);
   }
 
+  .note.quiet {
+    border-left-color: var(--muted);
+  }
+
   .note strong {
     color: var(--warn);
   }
diff --git a/src/components/Businesses.svelte b/src/components/Businesses.svelte
index ebc4bbd..3ad2154 100644
--- a/src/components/Businesses.svelte
+++ b/src/components/Businesses.svelte
@@ -210,11 +210,6 @@
 
   /** Short summary of the bought upgrades, e.g. "Equipment, Technician: Cash". */
   function summary(property: Property): string {
-    const shutDown = isShutDown(owned, property.id) ? 'Shut down · ' : ''
-    return shutDown + upgradeSummary(property)
-  }
-
-  function upgradeSummary(property: Property): string {
     const parts = property.upgrades.flatMap((upgrade) => {
       const value = upgradeValue(owned, property.id, upgrade)
       if (upgrade.kind === 'toggle') return value === true ? [upgrade.label] : []
@@ -248,6 +243,7 @@
           class="lift"
           class:lifted={moving === property.id}
           class:settling={settling === property.id}
+          class:shut={isShutDown(owned, property.id)}
           style:translate={moving === property.id ? `${lift.x}px ${lift.y}px` : undefined}
         >
           <Panel title={property.label} move={handle(property.id)} moving={moving === property.id}>
@@ -325,6 +321,12 @@
     outline-offset: -1px;
   }
 
+  /* A shut-down business is greyed out but stays readable (issue #38). */
+  .lift.shut {
+    filter: grayscale(1);
+    opacity: 0.75;
+  }
+
   .lift.lifted {
     box-shadow: 0 0.75rem 2rem rgb(0 0 0 / 0.5);
     pointer-events: none;
diff --git a/src/components/PropertyList.svelte b/src/components/PropertyList.svelte
index 2f00589..2a65870 100644
--- a/src/components/PropertyList.svelte
+++ b/src/components/PropertyList.svelte
@@ -15,15 +15,24 @@
 </script>
 
 <Panel title="Properties">
-  {#each catalog as property (property.id)}
-    <PropertySettings {property} {owned} {onchange} />
-  {:else}
-    <p>No properties yet. They appear here as their trackers are built.</p>
-  {/each}
+  <div class="list">
+    {#each catalog as property (property.id)}
+      <PropertySettings {property} {owned} {onchange} />
+    {:else}
+      <p>No properties yet. They appear here as their trackers are built.</p>
+    {/each}
+  </div>
   <p class="hint">Trackers show only what you own. Upgrades change how fast they count.</p>
 </Panel>
 
 <style>
+  .list {
+    align-items: start;
+    display: grid;
+    gap: var(--space-3) var(--space-6);
+    grid-template-columns: repeat(auto-fill, minmax(min(100%, 22rem), 1fr));
+  }
+
   p {
     margin: 0;
   }
diff --git a/src/components/PropertySettings.svelte b/src/components/PropertySettings.svelte
index c86dfb0..e3f46cb 100644
--- a/src/components/PropertySettings.svelte
+++ b/src/components/PropertySettings.svelte
@@ -22,34 +22,36 @@
   let { property, owned, onchange }: Props = $props()
   const id = $props.id()
   const isPropertyOwned = $derived(isOwned(owned, property.id))
+  const isPropertyRunning = $derived(!isShutDown(owned, property.id))
 </script>
 
 <div class="property">
   <div class="owned">
     <span id="{id}-name" class="name">{property.label}</span>
-    <Button
-      variant={isPropertyOwned ? 'primary' : 'ghost'}
-      aria-labelledby="{id}-name"
-      aria-pressed={isPropertyOwned}
-      onclick={() => onchange(setOwned(owned, property.id, !isPropertyOwned))}
-    >
-      {isPropertyOwned ? 'Owned' : 'Not owned'}
-    </Button>
+    <div class="toggles">
+      {#if isPropertyOwned && property.canShutDown}
+        <Button
+          variant={isPropertyRunning ? 'primary' : 'ghost'}
+          aria-label="{property.label} running"
+          aria-pressed={isPropertyRunning}
+          onclick={() => onchange(setShutDown(owned, property.id, isPropertyRunning))}
+        >
+          {isPropertyRunning ? 'Running' : 'Shut down'}
+        </Button>
+      {/if}
+      <Button
+        variant={isPropertyOwned ? 'primary' : 'ghost'}
+        aria-labelledby="{id}-name"
+        aria-pressed={isPropertyOwned}
+        onclick={() => onchange(setOwned(owned, property.id, !isPropertyOwned))}
+      >
+        {isPropertyOwned ? 'Owned' : 'Not owned'}
+      </Button>
+    </div>
   </div>
 
-  {#if isPropertyOwned && (property.upgrades.length > 0 || property.canShutDown)}
+  {#if isPropertyOwned && property.upgrades.length > 0}
     <div class="upgrades">
-      {#if property.canShutDown}
-        <label>
-          <input
-            type="checkbox"
-            checked={isShutDown(owned, property.id)}
-            onchange={(event) =>
-              onchange(setShutDown(owned, property.id, event.currentTarget.checked))}
-          />
-          Shut down
-        </label>
-      {/if}
       {#each property.upgrades as upgrade (upgrade.id)}
         {#if upgrade.kind === 'toggle'}
           <label>
@@ -113,6 +115,15 @@
     justify-content: space-between;
   }
 
+  /* Right-aligned, also when a long name pushes them onto their own line. */
+  .toggles {
+    display: flex;
+    flex-wrap: wrap;
+    gap: var(--space-2);
+    justify-content: flex-end;
+    margin-left: auto;
+  }
+
   .name {
     font-family: var(--font-display);
     letter-spacing: var(--tracking);
diff --git a/src/components/Settings.svelte b/src/components/Settings.svelte
index 48feea3..3552584 100644
--- a/src/components/Settings.svelte
+++ b/src/components/Settings.svelte
@@ -1,7 +1,7 @@
 <script lang="ts">
   import { PROPERTIES } from '../data/properties'
   import { exportFileName } from '../lib/state'
-  import { exportText, importText, store } from '../lib/store.svelte'
+  import { exportText, importText, setProperties, store } from '../lib/store.svelte'
   import PropertyList from './PropertyList.svelte'
   import Button from './ui/Button.svelte'
   import Panel from './ui/Panel.svelte'
@@ -38,12 +38,6 @@
 </script>
 
 <div class="grid">
-  <PropertyList
-    catalog={PROPERTIES}
-    owned={store.state.properties}
-    onchange={(owned) => (store.state.properties = owned)}
-  />
-
   <Panel title="Clock">
     <label>
       <input type="checkbox" bind:checked={store.state.clock.trackOnOpen} />
@@ -75,6 +69,11 @@
       <p class:error={message.error} role="status">{message.text}</p>
     {/if}
   </Panel>
+
+  <!-- The long list goes last, across the whole width, in as many columns as fit. -->
+  <div class="wide">
+    <PropertyList catalog={PROPERTIES} owned={store.state.properties} onchange={setProperties} />
+  </div>
 </div>
 
 <style>
@@ -84,6 +83,11 @@
     grid-template-columns: repeat(auto-fill, minmax(min(100%, 24rem), 1fr));
   }
 
+  .wide {
+    display: grid;
+    grid-column: 1 / -1;
+  }
+
   p {
     margin: 0;
   }
diff --git a/src/lib/production.test.ts b/src/lib/production.test.ts
index b7a23c3..ee3c0a4 100644
--- a/src/lib/production.test.ts
+++ b/src/lib/production.test.ts
@@ -2,6 +2,7 @@ import { describe, expect, it } from 'vitest'
 import { PRODUCTION, type Production } from '../data/production'
 import { PROPERTIES } from '../data/properties'
 import {
+  clearShutDownStock,
   estimatedParts,
   farValueEstimated,
   forecast,
@@ -277,6 +278,25 @@ describe('produceAll', () => {
   })
 })
 
+describe('clearShutDownStock', () => {
+  const running = owning('bunker')
+  const shut = setShutDown(running, 'bunker', true)
+
+  it('empties the stock and keeps the supplies when a business is shut down', () => {
+    const businesses = { bunker: { stock: 40, supplies: 60 }, 'mc-weed': { stock: 10 } }
+    expect(clearShutDownStock(businesses, running, shut)).toEqual({
+      bunker: { stock: 0, supplies: 60 },
+      'mc-weed': { stock: 10 },
+    })
+  })
+
+  it('changes nothing when it was already shut down or starts again', () => {
+    const businesses = { bunker: { stock: 40, supplies: 60 } }
+    expect(clearShutDownStock(businesses, shut, shut)).toBe(businesses)
+    expect(clearShutDownStock(businesses, shut, running)).toBe(businesses)
+  })
+})
+
 describe('acid lab', () => {
   const lab = property('acid-lab')
   const upgraded = owning('acid-lab', { equipment: true })
diff --git a/src/lib/production.ts b/src/lib/production.ts
index a2a8ace..577d9cf 100644
--- a/src/lib/production.ts
+++ b/src/lib/production.ts
@@ -2,7 +2,7 @@
 // Pure logic: play time and wall-clock time come in as arguments (decision 003).
 import type { Production, ProductionBoost, ProductionRate } from '../data/production'
 import type { Property } from '../data/properties'
-import { isOwned, isRunning, upgradeValue, type OwnedProperties } from './properties'
+import { isOwned, isRunning, isShutDown, upgradeValue, type OwnedProperties } from './properties'
 import { settleBars, type Bars } from './resync'
 
 /** A rate with everything needed to run production on its own. */
@@ -307,6 +307,24 @@ export function produceAll(
   return next
 }
 
+/**
+ * Empties the stock of every business that `after` shuts down and `before` did not: the game
+ * clears the stock but keeps the supplies (issue #38). Returns `businesses` itself if none.
+ */
+export function clearShutDownStock(
+  businesses: BusinessBarsById,
+  before: OwnedProperties,
+  after: OwnedProperties,
+): BusinessBarsById {
+  let next = businesses
+  for (const [id, bars] of Object.entries(businesses)) {
+    if (bars.stock > 0 && isShutDown(after, id) && !isShutDown(before, id)) {
+      next = { ...next, [id]: { ...bars, stock: 0 } }
+    }
+  }
+  return next
+}
+
 /**
  * Checks saved bars. Entries are kept for any id, like owned properties (decision 011).
  * Returns an error message if the shape is wrong.
diff --git a/src/lib/store.svelte.ts b/src/lib/store.svelte.ts
index 0c2bab4..6bb8164 100644
--- a/src/lib/store.svelte.ts
+++ b/src/lib/store.svelte.ts
@@ -1,6 +1,9 @@
 // The app's one reactive state, saved to localStorage on every change (decision 006).
-// Logic lives in persistence.ts and state.ts; this file only wires them to Svelte and the browser.
+// Logic lives in persistence.ts, state.ts and the trackers; this file wires it to Svelte and
+// the browser.
 import { createPersistence, type KeyValueStorage, type PersistStatus } from './persistence'
+import { clearShutDownStock } from './production'
+import type { OwnedProperties } from './properties'
 import { defaultState, parseState, type AppState } from './state'
 
 function browserStorage(): KeyValueStorage | null {
@@ -44,6 +47,13 @@ export function saveNow(): void {
   persistence.flush()
 }
 
+/** Saves new property settings; shutting a business down empties its stock (issue #38). */
+export function setProperties(owned: OwnedProperties): void {
+  const { businesses, properties } = store.state
+  store.state.businesses = clearShutDownStock(businesses, properties, owned)
+  store.state.properties = owned
+}
+
 /** JSON text for a backup file. While stored data is blocked, that data is exported instead. */
 export function exportText(): string {
   return persistence.exportText($state.snapshot(store.state))

From b6d964dca8582f140e28239e4377a6b4bc1f9f26 Mon Sep 17 00:00:00 2001
From: Claude <noreply@anthropic.com>
Date: Thu, 15 Oct 2026 09:49:30 +0000
Subject: [PATCH 3/3] Dim shut-down cards instead of greying them

The card keeps its colours and gets darker, like a disabled control. The
"Shut down." label in its note is no longer in the warning colour.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
---
 docs/decisions/020-shut-down.md          | 4 ++--
 src/components/BusinessProduction.svelte | 4 ++++
 src/components/Businesses.svelte         | 5 ++---
 3 files changed, 8 insertions(+), 5 deletions(-)

diff --git a/docs/decisions/020-shut-down.md b/docs/decisions/020-shut-down.md
index c6d445d..004ef93 100644
--- a/docs/decisions/020-shut-down.md
+++ b/docs/decisions/020-shut-down.md
@@ -16,8 +16,8 @@
   `clearShutDownStock` in `lib/production.ts`, applied by `setProperties` in the store whenever a
   business goes from running to shut down. Starting it again changes nothing.
 - **Shut down means "not running" everywhere** (`isRunning` in `lib/properties.ts`):
-  - production (decision 012) makes no stock and uses no supplies; the card is greyed out but
-    readable, keeps its bars and value, has a grey "Shut down" note (not the yellow warning),
+  - production (decision 012) makes no stock and uses no supplies; the card is dimmed (darker,
+    colours kept) but readable, keeps its bars and value, has a grey "Shut down" note (not the yellow warning),
     and hides the countdowns and the boost;
   - nightclub goods (decision 015) whose only unlocking business is shut down count as locked,
     so the Locked note and the best-setup suggestion follow;
diff --git a/src/components/BusinessProduction.svelte b/src/components/BusinessProduction.svelte
index 443252c..c83e193 100644
--- a/src/components/BusinessProduction.svelte
+++ b/src/components/BusinessProduction.svelte
@@ -219,4 +219,8 @@
   .note strong {
     color: var(--warn);
   }
+
+  .note.quiet strong {
+    color: inherit;
+  }
 </style>
diff --git a/src/components/Businesses.svelte b/src/components/Businesses.svelte
index 3ad2154..fb49100 100644
--- a/src/components/Businesses.svelte
+++ b/src/components/Businesses.svelte
@@ -321,10 +321,9 @@
     outline-offset: -1px;
   }
 
-  /* A shut-down business is greyed out but stays readable (issue #38). */
+  /* A shut-down business is dimmed like a disabled control: same colours, darker (issue #38). */
   .lift.shut {
-    filter: grayscale(1);
-    opacity: 0.75;
+    filter: brightness(0.65);
   }
 
   .lift.lifted {