diff --git a/docs/IMPLEMENTATION_STATUS.md b/docs/IMPLEMENTATION_STATUS.md
index b99be487..def4b72d 100644
--- a/docs/IMPLEMENTATION_STATUS.md
+++ b/docs/IMPLEMENTATION_STATUS.md
@@ -38,6 +38,21 @@ on the five implemented rulings:
 No capture was reset, force-completed or bypassed, and no guard was weakened.
 The resumed runs are saved-position continuations, not fresh re-runs.
 
+### Fresh `combined-homeworld-nexus` run and the Auditor custody fix
+
+A fresh `--profile combined-homeworld-nexus --rules both --players all` run
+exposed a harness gap rather than a product defect: `tools/sample-custody.ts`
+built its expected Traitor deck from the printed leaders only, while Advanced
+CHOAM adds its printed extra **Auditor** disc during setup, so every fresh
+Advanced all-expansion sample failed at setup with `physical traitor custody`.
+The expectation now includes the Auditor for Advanced CHOAM seats.
+
+With that fixed the fresh run completes **2/4** (both Advanced: 6-seat winner
+ixians, 5-seat winner ecaz + ixians). The two Basic samples stop at phase 6 on
+`Odd-force Basic Occupy awaits the preserved publisher casualty-rounding
+ruling` — the same third-party question listed above, not the implemented
+rulings. `tests/sample-custody.test.ts` (11 cases) still passes.
+
 ## 7 October 2026 — five pending user rulings implemented
 
 The user resolved five recorded rule questions; each is indexed in
diff --git a/tools/sample-custody.ts b/tools/sample-custody.ts
index bb44a681..b4d1b80e 100644
--- a/tools/sample-custody.ts
+++ b/tools/sample-custody.ts
@@ -1,5 +1,5 @@
 import assert from 'node:assert/strict';
-import { leaders, treacheryDeck } from '../game/cards';
+import { createAuditorLeader, leaders, treacheryDeck } from '../game/cards';
 import type { Game } from '../game/engine';
 import { richeseCards } from '../game/richese-cards';
 import { ecazTreacheryCards } from '../game/ecaz-cards';
@@ -29,7 +29,16 @@ export function sampleInventory(game: Game) {
       !game.moritaniAssassinatePreview
       ? null
       : traitorDeck(
-          game.players.map((player) => ({ leaders: leaders(player.faction) })),
+          game.players.map((player) => ({
+            // Advanced CHOAM adds its printed extra Auditor disc during setup, so
+            // its Traitor Card is part of the physical deck.
+            leaders: [
+              ...leaders(player.faction),
+              ...(game.advanced && player.faction === 'choam'
+                ? [createAuditorLeader()]
+                : []),
+            ],
+          })),
           game.expansions.includes('ix'),
         ).sort(),
   };