diff --git a/shared/diy.js b/shared/diy.js
index 7bca58b9..ca4e7597 100644
--- a/shared/diy.js
+++ b/shared/diy.js
@@ -12,7 +12,8 @@
 // - no 特质 (PRTS "甄选加入的干员不会拥有任何特质"); bonds from the operator's factions (`diy.operators[id].bonds`);
 // - the normal form is E2 Lv1, skill rank 4, no module; the elite E2 Lv60, rank 7, its module at stage 1 (tier 5) or 3
 //   (tier 6) — the slot record's `status` (activity_table diyChessDict) picks the unit form;
-// - an owned pick chooses its skill (any of 3) and module (any of its modules, or none); a prototype carries the skill
+// - an owned pick chooses its skill (any of 3) and module (any of its modules but a 集成战略-only one — ISW-A, "在集成战略
+//   中…" [ASSUMED: not usable outside 集成战略, the owner's decision of 2026-10-05] — or none); a prototype carries the skill
 //   and module of its 补位 rows at that tier (`diy.locked`: "技能携带规则与系统补位时一致" — [ASSUMED] that reading, the
 //   owner's decision of 2026-10-05);
 // - potential 0 for everyone [ASSUMED: no account].
@@ -24,6 +25,20 @@ import { composeUnitRecord, unitForm, statusKey } from './standIn.js';
 /** The tiers that have 自选 slots. */
 export const DIY_TIERS = Object.freeze([5, 6]);
 
+/**
+ * Module types a 自选 pick never carries: the 集成战略 modules (ISW-A — their own effect applies only "在集成战略中")
+ * [ASSUMED: not usable outside 集成战略, the owner's decision of 2026-10-05].
+ */
+export const DIY_EXCLUDED_MODULE_TYPE = /^ISW-/;
+
+/**
+ * Whether a module of a unit form (`forms[k].modules[]` entry) may be picked for a 自选 piece (DIY_EXCLUDED_MODULE_TYPE).
+ * @param {any} mod
+ */
+export function isDiyModule(mod) {
+  return isObj(mod) && typeof mod.uniEquipId === 'string' && !DIY_EXCLUDED_MODULE_TYPE.test(String(mod.typeName ?? ''));
+}
+
 /**
  * @typedef {{ charId: string, skillIndex?: number|null, uniEquipId?: string|null }} DiyPick a 自选 pick: the operator,
  *   its skill index (0-based; a prototype's is its locked one) and module (uniEquipId; null / absent / 'none' = none)
@@ -160,9 +175,11 @@ export function checkDiyPick(slotId, pick, data) {
   }
   if (!forms.every((f) => (f.skills ?? []).some((s) => s && s.index === skillIndex))) return { error: `${charId}: no skill ${skillIndex}` };
   const elite = forms[1];
-  if (uniEquipId !== null && !(elite.modules ?? []).some((m) => m && m.uniEquipId === uniEquipId)) {
+  const mod = uniEquipId !== null ? (elite.modules ?? []).find((m) => m && m.uniEquipId === uniEquipId) : null;
+  if (uniEquipId !== null && !mod) {
     return { error: `${charId}: no module ${uniEquipId} at stage ${slot.golden?.status?.equipLevel ?? '?'}` };
   }
+  if (mod && !proto && !isDiyModule(mod)) return { error: `${charId}: ${uniEquipId} is a 集成战略 module (${mod.typeName})` };
   return { ok: true, pick: { charId, skillIndex, uniEquipId } };
 }
 
diff --git a/test/diy.test.js b/test/diy.test.js
index a9e141f0..a51799c6 100644
--- a/test/diy.test.js
+++ b/test/diy.test.js
@@ -8,7 +8,7 @@
 import { test } from 'node:test';
 import assert from 'node:assert/strict';
 import { readFileSync } from 'node:fs';
-import { diyPool, diySlot, diySlotIds, checkDiyPick, diyRecord, diyRecordOf, validateDiyPicks, lockedSelection, diyTokenOwner, DIY_TIERS } from '../shared/diy.js';
+import { diyPool, diySlot, diySlotIds, checkDiyPick, diyRecord, diyRecordOf, validateDiyPicks, lockedSelection, diyTokenOwner, isDiyModule, DIY_TIERS } from '../shared/diy.js';
 import { unitForm, composeUnitRecord } from '../shared/standIn.js';
 import { composeStats, composeTalents } from '../shared/loadoutRecord.js';
 import { normalizeChess, resolveLoadout, loadoutRecord } from '../server/sim/simdata.js';
@@ -29,7 +29,8 @@ test('slots: two per tier (5, 6), each with its elite twin', () => {
   assert.deepEqual(DIY_TIERS, [5, 6]);
   assert.deepEqual(diySlotIds(DATA), [T5, T5B, T6, T6B]);
   assert.deepEqual(diySlot('chess_char_6_diy2_b', DATA) && { ...diySlot('chess_char_6_diy2_b', DATA), normal: undefined, golden: undefined },
-    { baseId: T6B, goldenId: 'chess_char_6_diy2_b', tier: 6, elite: true, normal: undefined, golden: undefined });
+    { baseId: T6B, goldenId: 'chess_char_6_diy2_b', tier: 6, shopLevel: 6, elite: true, normal: undefined, golden: undefined });
+  assert.deepEqual([T5, T5B, T6, T6B].map((id) => diySlot(id, DATA).shopLevel), [5, 5, 6, 6], 'shopLevelDisplayDataDict: the 调度中心 level that lists the slot');
   assert.equal(diySlot('chess_char_5_01_a', DATA), null, 'not a slot');
   assert.equal(diyTokenOwner(SIEGE, chess.chess_char_6_diy1_b.status), 'char_112_siege@2/60/7/3');
 });
@@ -102,6 +103,21 @@ test('checkDiyPick: an owned 6★ chooses any of its 3 skills and any module of
   for (const [slot, pick, re] of bad) assert.match(checkDiyPick(slot, pick, DATA).error, re, JSON.stringify(pick));
 });
 
+test('checkDiyPick: an owned pick never carries a 集成战略 module (ISW-A) [ASSUMED, the owner\'s decision of 2026-10-05]', () => {
+  const backups = DATA.backups;
+  let checked = 0;
+  for (const charId of backups.diy.ownedPool) {
+    for (const [slot, key] of [[T5, '2/60/7/1'], [T6, '2/60/7/3']]) {
+      for (const mod of backups.units[charId].forms[key]?.modules ?? []) {
+        const c = checkDiyPick(slot, { charId, skillIndex: 0, uniEquipId: mod.uniEquipId }, DATA);
+        if (/^ISW-/.test(mod.typeName)) { assert.match(c.error || '', /集成战略 module/, `${charId} ${mod.uniEquipId}`); assert.equal(isDiyModule(mod), false); checked++; }
+        else assert.ok(c.ok, `${charId} ${mod.uniEquipId}: ${c.error}`);
+      }
+    }
+  }
+  assert.ok(checked >= 6, 'the ISW-A modules of the pool (凯尔希, 傀影, 菲亚梅塔, 提丰, 艾丽妮, 霍尔海雅) at both stages');
+});
+
 test('diyRecord: the slot\'s identity (tier, price, merge, status), no 特质, derived bonds, the operator\'s body at the slot form; module active on the elite only, stage 1 / 3', () => {
   const cases = [[T5, false, '2/1/4/0', 0], [T5, true, '2/60/7/1', 1], [T6, false, '2/1/4/0', 0], [T6, true, '2/60/7/3', 3]];
   for (const [slotId, elite, key, stage] of cases) {