feedback1 WB: bounty drafts and the 机密商店 from 66 official screenshots (22 matches)

Bounty drafts: every 悬赏决策 event is a fixed card list and the draft shows
6 different cards of it, drawn with weight 1 + the official drafts of its
group the card showed in.
- R3: 9 of the 10 fixed sets seen (two new: 20_1 + 20_5, and one with 17_6);
  3 x I + 2 x II + 1 x III in 22 of 22. The unseen 10th set is built by a
  rule whose III is 10_6 or 20_6, the only two-battle cards no draft showed.
- R9: 6 groups of 9 cards, one per bossInitial event. The 鼠王 group came in
  14 of 22 matches (every grey-board match among them), so groups are picked
  by the matches they came in. Named bosses no longer always come together.
- R11: lists of 7 cards, the draft leaves out one (matches 1 / 6 / 21 / 22
  leave out four different cards of one list); 7 of 15 lists seen, the rest
  and the 4 partial lists' 7th cards built by rule. Families 14 / 4 / 4.

机密商店 (the user: "机密商店按官方改成可以重复吧"): choices.json shopDraft,
six slots drawn with replacement - VI, VI, V, 盟约之币 and twice
V / IV / III / 盟约之币, items weighted by the official cards they showed on.
A repeated item now comes in about 61 % of shops (official 3 of 4). Two
identical cards stay two cards (picks by index): E2E, overlay and a
headless-Chrome test (game-mock ?variant=shop, the official match 8 shop).

test/content/choices.test.js

@@ -350,7 +350,7 @@ test('道具补给 E2E (co-op): 6 free normal items within the round window; the
   m.dispose();
 });
 
-test('机密商店 E2E (solo HARD R11): 3 free normal items of any tier I–VI; a second copy merges into the 进阶 item', () => {
+test('机密商店 E2E (solo HARD R11): 3 free normal items of the official composition; a second copy merges into the 进阶 item', () => {
   const data = dataWith('mode_single_hard', 11, 'shop');
   const h = makeMatch({ mode: 'solo', difficulty: 'HARD', humans: 1, seed: 42, data, registry: REG, fake: true });
   const m = h.m;
@@ -372,22 +372,62 @@ test('机密商店 E2E (solo HARD R11): 3 free normal items of any tier I–VI;
   m.dispose();
 });
 
-test('机密商店 draws every tier I–VI with duplicates allowed (generation, 30 drafts)', () => {
+test('机密商店 draws the official composition with duplicates allowed (generation, 30 drafts; the evidence is test/match/feedback1-secret-shop.test.js)', () => {
   const h = makeMatch({ mode: 'coop', difficulty: 'HARD', humans: 1, seed: 5, data: dataWith('mode_multi_hard', 11, 'shop'), registry: REG, fake: true });
+  const coin = DATA.choices.shopDraft.coin;
   const tiers = new Set();
   let dupes = 0;
   for (let i = 0; i < 30; i++) {
     const d = generateDraft(h.m.gd, h.m.rngDraft, 11, { stageId: h.m.stageId });
     assert.equal(d.family, 'shop');
     assert.equal(d.cards.length, 6);
+    assert.equal(d.cards.filter((c) => DATA.items[c.id].tier === 6).length, 2, 'two tier-VI items');
+    assert.ok(d.cards.some((c) => c.id === coin), 'a 盟约之币');
     for (const c of d.cards) tiers.add(DATA.items[c.id].tier);
     if (new Set(d.cards.map((c) => c.id)).size < d.cards.length) dupes++;
   }
   h.m.dispose();
-  assert.deepEqual([...tiers].sort(), [1, 2, 3, 4, 5, 6]);
+  assert.deepEqual([...tiers].sort(), [1, 3, 4, 5, 6], 'tiers III–VI and the tier-I 盟约之币');
   assert.ok(dupes > 0, 'duplicates allowed');
 });
 
+test('机密商店 E2E (co-op): two identical cards are two cards — both can be taken, by index, and each picker gets the item', () => {
+  // six 变形同构体: every slot draws the one item `coin` names
+  const one = Object.values(DATA.items).find((i) => i.name === '变形同构体' && !i.isGolden).id;
+  const data = dataWith('mode_multi_hard', 3, 'shop');
+  data.choices = { ...data.choices, shopDraft: { ...data.choices.shopDraft, slots: Array.from({ length: 6 }, () => ({ coin: 1 })), coin: one } };
+  const h = makeMatch({ mode: 'coop', difficulty: 'HARD', humans: 2, bots: 2, seed: 43, data, registry: REG, fake: true });
+  const m = h.m;
+  h.start();
+  const sp = toDraft(h, 3);
+  assert.equal(sp.family, 'shop');
+  const pub = m.publicView().sp;
+  assert.deepEqual(pub.cards.map((c) => c.id), Array(6).fill(one), 'six identical offers');
+  assert.deepEqual(pub.cards.map((c) => c.idx), [0, 1, 2, 3, 4, 5], 'each its own index');
+  const funds = { p_0: h.ps('p_0').funds, p_1: h.ps('p_1').funds };
+  const picked = {};
+  for (let guard = 0; guard < 1000 && m.phase === 'SP_DRAFT'; guard++) {
+    const pid = m.spTurn();
+    if (pid !== 'p_0' && pid !== 'p_1') { h.sched.runNext(); continue; }
+    // a taken card is refused even though an identical one is still free
+    const taken = Object.keys(m.sp.taken).map(Number);
+    if (taken.length) assert.deepEqual(m.handle(pid, { t: 'g.choice', idx: taken[0] }), { error: 'SOLD_OUT' }, 'a taken index stays taken');
+    const idx = m.sp.cards.find((c) => m.sp.taken[c.idx] == null).idx;
+    assert.deepEqual(m.handle(pid, { t: 'g.choice', idx }), { ok: true });
+    picked[pid] = idx;
+  }
+  assert.equal(m.phase, 'PREP');
+  assert.notEqual(picked.p_0, picked.p_1, 'two different cards of the same item');
+  assert.equal(Object.keys(sp.taken).length, 4, 'every player took one of the identical cards');
+  for (const pid of ['p_0', 'p_1']) {
+    const ps = h.ps(pid);
+    assert.ok([...ps.hand, ...ps.temp].some((p) => p && (p.id === one || p.id === DATA.items[one].goldenId)), `${pid} holds the item`);
+    assert.equal(ps.funds, funds[pid], 'free');
+  }
+  matchInvariants(m);
+  m.dispose();
+});
+
 // =====================================================================================================================
 // 战术决策 — prep-side cards
 

test/fixtures/official-bounty-drafts.json

@@ -1,7 +1,8 @@
 {
-  "_doc": "Official 机变 drafts at the start of rounds 3, 9 and 11, read from screenshots of 11 official co-op matches collected by the user (2026-10-03; player names left out). The cards are in screen order (left to right, top to bottom). A bounty card is [title, enemy as printed, coins, battles] (battles 2 = 接下来两场作战, 1 = 下场作战 / 下场战斗; 源石虫·特训 pays 0); a 机密商店 card is [item, tier]; a 战术决策 card is [name]. Names are converted to Simplified Chinese. Matches 1 and 2 come from the Traditional-Chinese client, 3-11 from Simplified-Chinese video captures. Every match is a 4-player co-op match of 绝境 or 终极 (the modes whose SP rounds are 3, 9 and 11; the HUD does not say which). Used by test/match/feedback1-bounty.test.js.",
+  "_doc": "Official 机变 drafts at the start of rounds 3, 9 and 11, read from screenshots of 22 official co-op matches collected by the user (33 on 2026-10-03, 33 more the same day; player names left out). The cards are in screen order (left to right, top to bottom). A bounty card is [title, enemy as printed, coins, battles] (battles 2 = 接下来两场作战, 1 = 下场作战 / 下场战斗; 源石虫·特训 pays 0); a 机密商店 card is [item, tier]; a 战术决策 card is [name]. Names are converted to Simplified Chinese. Matches 1 and 2 come from the Traditional-Chinese client, 3-22 from Simplified-Chinese video captures of one uploader; the user dates the videos to the end of March 2026, all of one season (卫戍协议：盟约 下半, act2autochess). Every match is a 4-player co-op match of 绝境 or 终极 (the modes whose SP rounds are 3, 9 and 11; the HUD does not say which). A card another player has taken stays in its slot, greyed with the taker's avatar (match 17 R3: 迷茫的修理小助手; match 21 R9: 大鲍勃 and 杰斯顿·威廉姆斯): one shared draft, one pick each in turn. `boards` = the colour of the battlefield behind the overlay (the same in all three rounds of a match). Used by test/match/feedback1-bounty.test.js.",
   "season": "act2autochess",
   "aliases": { "深池重甲卫队队长": "深池重甲卫士队长" },
+  "boards": { "_doc": "grey = dark grey metal tiles with blue / red frames; tan = sandy / beige tiles (possibly more than one map)", "grey": [8, 9, 11, 13, 16, 18, 19], "tan": [1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 17, 20, 21, 22] },
   "matches": {
     "1": {
       "3": { "family": "bounty", "cards": [["悬赏·损伤I", "临时收音师", 1, 2], ["悬赏·损伤III", "主角阵营角色", 3, 2], ["悬赏·特异I", "迷茫的修理小助手", 1, 2], ["悬赏·特异II", "寻仇者", 2, 2], ["悬赏·特异II", "圣堂剑士", 2, 2], ["悬赏·特异I", "高能源石虫", 1, 2]] },
@@ -57,6 +58,61 @@
       "3": { "family": "bounty", "cards": [["悬赏·持续I", "萨卡兹枯朽战士组长", 1, 2], ["悬赏·损伤I", "底海滑动者", 1, 2], ["悬赏·频次III", "清明", 3, 2], ["悬赏·折射II", "深池暗影术师", 2, 2], ["悬赏·飞行I", "妖怪", 1, 2], ["悬赏·隐匿II", "隐形术师", 2, 2]] },
       "9": { "family": "bounty", "cards": [["杰斯顿·威廉姆斯·悬赏", "杰斯顿·威廉姆斯", 4, 1], ["弑君者·悬赏", "弑君者", 1, 1], ["源石虫·特训", "源石虫", 0, 1], ["W·悬赏", "W", 1, 1], ["碎骨·悬赏", "碎骨", 1, 1], ["陷落雪祀·悬赏", "陷落雪祀", 3, 1]] },
       "11": { "family": "bounty", "cards": [["悬赏·特异II", "拥霜羽兽", 2, 1], ["悬赏·隐匿I", "重弩突袭者", 1, 1], ["悬赏·损伤I", "心虚设计师", 1, 1], ["悬赏·特异III", "乌顶巨角卢鲁", 3, 1], ["悬赏·频次I", "沏虹", 1, 1], ["悬赏·持续I", "假想敌：蚀裂", 1, 1]] }
+    },
+    "12": {
+      "3": { "family": "bounty", "cards": [["悬赏·损伤II", "控潮术师", 2, 2], ["悬赏·频次I", "磨砻", 1, 2], ["悬赏·损伤II", "无胄盟清扫小队", 2, 2], ["悬赏·持续I", "萨卡兹枯朽战士", 1, 2], ["悬赏·飞行I", "妖怪", 1, 2], ["悬赏·折射III", "深池伙友卫队", 3, 2]] },
+      "9": { "family": "bounty", "cards": [["碎骨·悬赏", "碎骨", 1, 1], ["大鲍勃·悬赏", "大鲍勃", 2, 1], ["弑君者·悬赏", "弑君者", 1, 1], ["W·悬赏", "W", 1, 1], ["源石虫·特训", "源石虫", 0, 1], ["杰斯顿·威廉姆斯·悬赏", "杰斯顿·威廉姆斯", 4, 1]] },
+      "11": { "family": "bounty", "cards": [["悬赏·折射II", "愤怒的守墓石像", 2, 1], ["悬赏·特异III", "萨卡兹骸骨拷打者", 3, 1], ["悬赏·飞行I", "法术大师A2", 1, 1], ["悬赏·损伤I", "心虚设计师", 1, 1], ["悬赏·损伤II", "灼藤", 2, 1], ["悬赏·频次I", "沏虹", 1, 1]] }
+    },
+    "13": {
+      "3": { "family": "bounty", "cards": [["悬赏·损伤I", "底海滑动者", 1, 2], ["悬赏·频次I", "磨砻", 1, 2], ["悬赏·持续II", "逐腐兽", 2, 2], ["悬赏·折射II", "深池暗影术师", 2, 2], ["悬赏·特异III", "自制投石机", 3, 2], ["悬赏·隐匿I", "隐形弩手", 1, 2]] },
+      "9": { "family": "bounty", "cards": [["陷落雪祀·悬赏", "陷落雪祀", 3, 1], ["源石虫·特训", "源石虫", 0, 1], ["碎骨·悬赏", "碎骨", 1, 1], ["弑君者·悬赏", "弑君者", 1, 1], ["W·悬赏", "W", 1, 1], ["大鲍勃·悬赏", "大鲍勃", 2, 1]] },
+      "11": { "family": "bounty", "cards": [["悬赏·频次I", "沏虹", 1, 1], ["悬赏·折射II", "深池重甲卫队队长", 2, 1], ["悬赏·特异III", "狂暴宿主组长", 3, 1], ["悬赏·特异II", "拥霜羽兽", 2, 1], ["悬赏·持续II", "尖端萨卡兹枯朽战车", 2, 1], ["悬赏·隐匿I", "重弩突袭者", 1, 1]] }
+    },
+    "14": {
+      "3": { "family": "bounty", "cards": [["悬赏·特异I", "新手祭司学徒", 1, 2], ["悬赏·特异I", "冒失的小弟", 1, 2], ["悬赏·特异II", "骇笑看客", 2, 2], ["悬赏·特异I", "雪孩子", 1, 2], ["悬赏·特异II", "水遁忍者", 2, 2], ["悬赏·特异III", "自制投石机", 3, 2]] },
+      "9": { "family": "bounty", "cards": [["大鲍勃·悬赏", "大鲍勃", 2, 1], ["杰斯顿·威廉姆斯·悬赏", "杰斯顿·威廉姆斯", 4, 1], ["源石虫·特训", "源石虫", 0, 1], ["弑君者·悬赏", "弑君者", 1, 1], ["碎骨·悬赏", "碎骨", 1, 1], ["“自在”·悬赏", "“自在”", 4, 1]] },
+      "11": { "family": "bounty", "cards": [["悬赏·飞行I", "法术大师A2", 1, 1], ["悬赏·特异II", "异质裂兽·α", 2, 1], ["悬赏·特异III", "伊利昂的木驮兽", 3, 1], ["悬赏·隐匿II", "家族暗影灭迹人", 2, 1], ["悬赏·特异I", "转译基底·α", 1, 1], ["悬赏·持续I", "假想敌：蚀裂", 1, 1]] }
+    },
+    "15": {
+      "3": { "family": "bounty", "cards": [["悬赏·特异II", "咸鳞汁推荐者", 2, 2], ["悬赏·折射I", "深池侦察犬pro", 1, 2], ["悬赏·损伤III", "反派阵营角色", 3, 2], ["悬赏·飞行II", "吉兆飞鳞", 2, 2], ["悬赏·特异I", "节日气球", 1, 2], ["悬赏·特异I", "简饲源石虫", 1, 2]] },
+      "9": { "family": "bounty", "cards": [["W·悬赏", "W", 1, 1], ["碎骨·悬赏", "碎骨", 1, 1], ["大鲍勃·悬赏", "大鲍勃", 2, 1], ["弑君者·悬赏", "弑君者", 1, 1], ["源石虫·特训", "源石虫", 0, 1], ["杰斯顿·威廉姆斯·悬赏", "杰斯顿·威廉姆斯", 4, 1]] },
+      "11": { "family": "bounty", "cards": [["悬赏·持续I", "假想敌：蚀裂", 1, 1], ["悬赏·隐匿I", "重弩突袭者", 1, 1], ["悬赏·频次I", "沏虹", 1, 1], ["悬赏·特异I", "转译基底·α", 1, 1], ["悬赏·飞行II", "枯朽萃聚使徒", 2, 1], ["悬赏·损伤II", "灼藤", 2, 1]] }
+    },
+    "16": {
+      "3": { "family": "bounty", "cards": [["悬赏·持续III", "萨卡兹枯朽战车", 3, 2], ["悬赏·特异I", "潜伏者", 1, 2], ["悬赏·频次I", "磨砻", 1, 2], ["悬赏·折射I", "深池方阵战士", 1, 2], ["悬赏·飞行II", "暴鸰", 2, 2], ["悬赏·损伤II", "控潮术师", 2, 2]] },
+      "9": { "family": "bounty", "cards": [["杰斯顿·威廉姆斯·悬赏", "杰斯顿·威廉姆斯", 4, 1], ["陷落雪祀·悬赏", "陷落雪祀", 3, 1], ["源石虫·特训", "源石虫", 0, 1], ["弑君者·悬赏", "弑君者", 1, 1], ["W·悬赏", "W", 1, 1], ["碎骨·悬赏", "碎骨", 1, 1]] },
+      "11": { "family": "bounty", "cards": [["悬赏·损伤I", "心虚设计师", 1, 1], ["悬赏·损伤II", "灼藤", 2, 1], ["悬赏·隐匿II", "家族暗影灭迹人", 2, 1], ["悬赏·折射II", "愤怒的守墓石像", 2, 1], ["悬赏·飞行I", "法术大师A2", 1, 1], ["悬赏·特异III", "萨卡兹骸骨拷打者", 3, 1]] }
+    },
+    "17": {
+      "3": { "family": "bounty", "cards": [["悬赏·特异II", "圣堂剑士", 2, 2], ["悬赏·特异I", "迷茫的修理小助手", 1, 2], ["悬赏·特异II", "寻仇者", 2, 2], ["悬赏·损伤I", "临时收音师", 1, 2], ["悬赏·损伤III", "主角阵营角色", 3, 2], ["悬赏·特异I", "高能源石虫", 1, 2]] },
+      "9": { "family": "bounty", "cards": [["碎骨·悬赏", "碎骨", 1, 1], ["“自在”·悬赏", "“自在”", 4, 1], ["陷落雪祀·悬赏", "陷落雪祀", 3, 1], ["弑君者·悬赏", "弑君者", 1, 1], ["源石虫·特训", "源石虫", 0, 1], ["大鲍勃·悬赏", "大鲍勃", 2, 1]] },
+      "11": { "family": "bounty", "cards": [["悬赏·飞行II", "枯朽萃聚使徒", 2, 1], ["悬赏·特异III", "泥岩巨像", 3, 1], ["悬赏·持续I", "假想敌：蚀裂", 1, 1], ["悬赏·隐匿I", "重弩突袭者", 1, 1], ["悬赏·频次II", "新硎", 2, 1], ["悬赏·折射II", "深池重甲卫队队长", 2, 1]] }
+    },
+    "18": {
+      "3": { "family": "bounty", "cards": [["悬赏·损伤III", "术师快艇", 3, 2], ["悬赏·隐匿I", "隐形弩手", 1, 2], ["悬赏·频次I", "俗心", 1, 2], ["悬赏·飞行I", "妖怪", 1, 2], ["悬赏·折射II", "深池暗影术师", 2, 2], ["悬赏·频次II", "烹泉", 2, 2]] },
+      "9": { "family": "bounty", "cards": [["杰斯顿·威廉姆斯·悬赏", "杰斯顿·威廉姆斯", 4, 1], ["“自在”·悬赏", "“自在”", 4, 1], ["源石虫·特训", "源石虫", 0, 1], ["大鲍勃·悬赏", "大鲍勃", 2, 1], ["“鼠王”·悬赏", "“鼠王”", 2, 1], ["弑君者·悬赏", "弑君者", 1, 1]] },
+      "11": { "family": "tactic", "cards": [["整备"], ["玛恩纳的盟誓"], ["斯卡蒂的盟誓"], ["萨尔贡驰援"], ["财富"], ["升华"]] }
+    },
+    "19": {
+      "3": { "family": "bounty", "cards": [["悬赏·隐匿I", "隐形弩手", 1, 2], ["悬赏·持续II", "逐腐兽", 2, 2], ["悬赏·频次I", "磨砻", 1, 2], ["悬赏·损伤I", "底海滑动者", 1, 2], ["悬赏·特异III", "自制投石机", 3, 2], ["悬赏·折射II", "深池暗影术师", 2, 2]] },
+      "9": { "family": "bounty", "cards": [["“自在”·悬赏", "“自在”", 4, 1], ["大鲍勃·悬赏", "大鲍勃", 2, 1], ["陷落雪祀·悬赏", "陷落雪祀", 3, 1], ["W·悬赏", "W", 1, 1], ["碎骨·悬赏", "碎骨", 1, 1], ["杰斯顿·威廉姆斯·悬赏", "杰斯顿·威廉姆斯", 4, 1]] },
+      "11": { "family": "bounty", "cards": [["悬赏·特异III", "伊利昂的木驮兽", 3, 1], ["悬赏·隐匿II", "家族暗影灭迹人", 2, 1], ["悬赏·特异I", "转译基底·α", 1, 1], ["悬赏·持续I", "假想敌：蚀裂", 1, 1], ["悬赏·飞行I", "法术大师A2", 1, 1], ["悬赏·特异II", "异质裂兽·α", 2, 1]] }
+    },
+    "20": {
+      "3": { "family": "bounty", "cards": [["悬赏·隐匿II", "隐形术师", 2, 2], ["悬赏·损伤I", "底海滑动者", 1, 2], ["悬赏·频次III", "清明", 3, 2], ["悬赏·持续I", "萨卡兹枯朽战士组长", 1, 2], ["悬赏·飞行I", "妖怪", 1, 2], ["悬赏·折射II", "深池暗影术师", 2, 2]] },
+      "9": { "family": "bounty", "cards": [["“庞贝”·悬赏", "“庞贝”", 2, 1], ["“复仇者”·悬赏", "“复仇者”", 6, 1], ["源石虫·特训", "源石虫", 0, 1], ["萨卡兹百夫长·悬赏", "萨卡兹百夫长", 2, 1], ["澪·悬赏", "澪", 3, 1], ["W·悬赏", "W", 1, 1]] },
+      "11": { "family": "tactic", "cards": [["阿戈尔驰援"], ["补给"], ["列装"], ["叙拉古驰援"], ["银灰的盟誓"], ["莫斯提马的盟誓"]] }
+    },
+    "21": {
+      "3": { "family": "bounty", "cards": [["悬赏·持续II", "逐腐兽", 2, 2], ["悬赏·特异III", "自制投石机", 3, 2], ["悬赏·折射II", "深池暗影术师", 2, 2], ["悬赏·隐匿I", "隐形弩手", 1, 2], ["悬赏·频次I", "磨砻", 1, 2], ["悬赏·损伤I", "底海滑动者", 1, 2]] },
+      "9": { "family": "bounty", "cards": [["弑君者·悬赏", "弑君者", 1, 1], ["碎骨·悬赏", "碎骨", 1, 1], ["大鲍勃·悬赏", "大鲍勃", 2, 1], ["“鼠王”·悬赏", "“鼠王”", 2, 1], ["杰斯顿·威廉姆斯·悬赏", "杰斯顿·威廉姆斯", 4, 1], ["W·悬赏", "W", 1, 1]] },
+      "11": { "family": "bounty", "cards": [["悬赏·特异III", "温顺的武装大驮兽", 3, 1], ["悬赏·折射II", "深池重甲卫队队长", 2, 1], ["悬赏·持续II", "尖端萨卡兹枯朽战车", 2, 1], ["悬赏·特异II", "异质裂兽·α", 2, 1], ["悬赏·频次I", "沏虹", 1, 1], ["悬赏·飞行I", "法术大师A2", 1, 1]] }
+    },
+    "22": {
+      "3": { "family": "bounty", "cards": [["悬赏·特异II", "咸鳞汁推荐者", 2, 2], ["悬赏·飞行II", "吉兆飞鳞", 2, 2], ["悬赏·特异I", "简饲源石虫", 1, 2], ["悬赏·特异I", "节日气球", 1, 2], ["悬赏·折射I", "深池侦察犬pro", 1, 2], ["悬赏·损伤III", "反派阵营角色", 3, 2]] },
+      "9": { "family": "bounty", "cards": [["澪·悬赏", "澪", 3, 1], ["弑君者·悬赏", "弑君者", 1, 1], ["喷气人·悬赏", "喷气人", 3, 1], ["W·悬赏", "W", 1, 1], ["纠缠藤蔓·悬赏", "纠缠藤蔓", 3, 1], ["大鲍勃·悬赏", "大鲍勃", 2, 1]] },
+      "11": { "family": "bounty", "cards": [["悬赏·特异III", "温顺的武装大驮兽", 3, 1], ["悬赏·频次I", "沏虹", 1, 1], ["悬赏·飞行I", "法术大师A2", 1, 1], ["悬赏·特异II", "异质裂兽·α", 2, 1], ["悬赏·持续II", "尖端萨卡兹枯朽战车", 2, 1], ["悬赏·损伤II", "灼藤", 2, 1]] }
     }
   },
   "extra": {

test/match/feedback1-bounty.test.js

@@ -1,15 +1,16 @@
 // Player feedback after 0.1.0, report #2 (workstream WB): "本来应该后期出的悬赏的怪物在前期的悬赏就出现了，导致选了打不过".
-// The user then collected the official 悬赏决策 of rounds 3, 9 and 11 in 11 official co-op matches (33 screenshots, 绝境 /
-// 终极; the readings are test/fixtures/official-bounty-drafts.json, player names left out). They settle the draft rules
-// (tools/build-data.mjs BOUNTY_INITIAL_SETS, server/match/choices.js bountyDraftCards):
-//   R3  six "接下来两场作战" cards, 3 × I + 2 × II + 1 × III, one of the official fixed sets (a whole series 17 / 18 / 19,
-//       or one card from each of 6 of the series 10–15 / 20) — 7 of the 10 events seen;
-//   R9  boss bounties + 源石虫·特训: a group of named bosses that come together + cheap ones to 6;
-//   R11 悬赏决策 / 机密商店 / 战术决策 (never 道具补给); its bounty: a group (one 特异III giant + 1–4 tier-II "下场战斗" cards,
-//       always together — matches 1 and 6 share the whole group) + tier-I cards to 6, at most one per faction series;
+// The user then collected the official 机变 of rounds 3, 9 and 11 in 22 official co-op matches (66 screenshots, 绝境 /
+// 终极, one season — videos of the end of March 2026; the readings are test/fixtures/official-bounty-drafts.json, player
+// names left out). They settle the draft rules (tools/build-data.mjs BOUNTY_INITIAL_SETS, server/match/choices.js
+// bountyDraftCards): a 悬赏决策 event is a fixed card list and the draft shows 6 different cards of it —
+//   R3  a set of six "接下来两场作战" cards (all six), 3 × I + 2 × II + 1 × III: 9 of the 10 events seen;
+//   R9  a group of 9 boss bounties / 源石虫·特训: 6 groups for the 6 events, the 鼠王 group in 14 of 22 matches;
+//   R11 悬赏决策 14 / 机密商店 4 / 战术决策 4 / 道具补给 0; its bounty: a list of 7 "下场战斗" cards (one 特异III giant),
+//       one per faction series — 7 of the 15 events seen, three of them whole (each draft leaves out one card);
 //   no draft shows a multi-round card, a pre-series card (enemyeffect_3_*), 战术特训 or the 鸭爵 set; no card twice.
 // Each card's enemy is fixed by its effect; the title only names category and tier (悬赏·损伤I = 底海滑动者 in
 // enemyeffect_12_4, 临时收音师 in enemyeffect_18_1). Real data, real draft code, the real match path for the players' case.
+// The 机密商店 is in test/match/feedback1-secret-shop.test.js.
 import { test } from 'node:test';
 import assert from 'node:assert/strict';
 import { readFileSync, existsSync } from 'node:fs';
@@ -27,57 +28,39 @@ const SPEC = DATA.choices.bountyDrafts;
 const COOP_BOUNTY_MODES = ['mode_multi_normal', 'mode_multi_hard', 'mode_multi_abyss'];
 const isBoss = (key) => DATA.enemies[key] && DATA.enemies[key].rank === 'BOSS';
 const sameSet = (a, b) => a.length === b.length && [...a].sort().join() === [...b].sort().join();
+const subset = (a, b) => a.every((x) => b.includes(x));
+const EE = (s) => `enemyeffect_${s}`;
 
 /** The data card of a screenshot reading [title, enemy, coins, battles] (by title, the enemy in the text, coins, battles). */
 function resolve([title, enemy, coin, battles]) {
   const name = OFFICIAL.aliases[enemy] || enemy;
-  const hits = CARDS.filter((c) => c.name === title && c.coin === coin && (c.desc.includes(`1只${name}`) || c.desc.includes(`1个${name}`))
+  // "1只萨卡兹枯朽战士，" — the enemy's whole name (萨卡兹枯朽战士 is not 萨卡兹枯朽战士组长)
+  const hits = CARDS.filter((c) => c.name === title && c.coin === coin && (c.desc.includes(`1只${name}，`) || c.desc.includes(`1个${name}，`))
     && (battles === 2 ? c.rounds === 2 : c.rounds === 1));
   assert.equal(hits.length, 1, `${title} ${enemy} ${coin}: ${hits.map((c) => c.effectId).join(', ') || 'no card'}`);
   return hits[0].effectId;
 }
-/** Every official draft of the fixture: [{ where, round, family, ids? }] (ids for 悬赏决策). */
+/** Every official draft of the fixture: [{ where, match, round, family, ids? }] (ids for 悬赏决策). */
 function officialDrafts() {
   const out = [];
   for (const [match, rounds] of Object.entries(OFFICIAL.matches)) {
-    for (const [round, d] of Object.entries(rounds)) out.push({ where: `match ${match} R${round}`, round: Number(round), family: d.family, ids: d.family === 'bounty' ? d.cards.map(resolve) : null });
+    for (const [round, d] of Object.entries(rounds)) out.push({ where: `match ${match} R${round}`, match: Number(match), round: Number(round), family: d.family, ids: d.family === 'bounty' ? d.cards.map(resolve) : null });
   }
-  for (const [key, d] of Object.entries(OFFICIAL.extra)) out.push({ where: key, round: 9, family: d.family, ids: d.cards.map(resolve) });
+  for (const [key, d] of Object.entries(OFFICIAL.extra)) out.push({ where: key, match: key, round: 9, family: d.family, ids: d.cards.map(resolve) });
   return out;
 }
 const tiersOf = (ids) => ids.map((id) => CARD.get(id).tier).sort().join('');
-
-/** The rule of the unseen R3 slots (and of the seen mixed sets): one card from each of 6 of the series, I I I II II III. */
-function mixedRule(ids) {
-  const mx = SPEC.initial.mixed;
-  const series = ids.map((id) => CARD.get(id).series);
-  return ids.length === mx.count && ids.every((id) => CARD.get(id).draftPool === 'initial') && new Set(series).size === series.length
-    && series.every((s) => mx.series.includes(s)) && tiersOf(ids) === mx.tiers.slice().sort().join('');
-}
-/** Which official R3 structure a set of ids is: 'set:<i>' (a seen set), 'mixed' (the unseen-slot rule) or null. */
-function initialFit(ids) {
-  const i = SPEC.initial.sets.findIndex((s) => sameSet(s.cards, ids));
-  if (i >= 0) return `set:${i}`;
-  return mixedRule(ids) ? 'mixed' : null;
-}
-/** The R9 groups a set of ids fits (its featured bosses all there, the rest from the group's fill). */
-const bossFits = (ids) => SPEC.boss.templates.map((t, i) => [t, i]).filter(([t]) => ids.length === SPEC.boss.count
-  && t.featured.every((id) => ids.includes(id)) && ids.filter((id) => !t.featured.includes(id)).every((id) => t.fill.includes(id))).map(([, i]) => i);
+/** The group of `spec` whose `seen` lists the draft's match. */
+const groupOf = (spec, d) => spec.groups.filter((g) => g.seen.includes(d.match));
 /** At most one card per faction series 10–15 (every official R11 draft). */
 function onePerSeries(ids) {
-  const series = ids.map((id) => CARD.get(id).series).filter((s) => SPEC.hunter.onePerSeries.includes(s));
+  const series = ids.map((id) => CARD.get(id).series).filter((s) => SPEC.hunter.rule.onePerSeries.includes(s));
   return new Set(series).size === series.length;
 }
-/** The seen R11 groups a set of ids fits (the group's giant + tier-II cards all there, the rest from its fill). */
-const hunterFits = (ids) => SPEC.hunter.templates.map((t, i) => [t, i]).filter(([t]) => ids.length === SPEC.hunter.count && onePerSeries(ids)
-  && t.featured.every((id) => ids.includes(id)) && ids.filter((id) => !t.featured.includes(id)).every((id) => t.fill.includes(id))).map(([, i]) => i);
-/** The R11 shape an unseen slot is built by: one tier-III giant, 1–4 tier-II group cards, tier-I fill, one per faction series. */
-function hunterShape(ids) {
-  const r = SPEC.hunter.rule;
-  const giants = ids.filter((id) => r.giants.includes(id)).length;
-  const group = ids.filter((id) => r.groupCards.includes(id)).length;
-  const fill = ids.filter((id) => r.fill.includes(id)).length;
-  return ids.length === SPEC.hunter.count && giants === 1 && r.groupSizes.includes(group) && giants + group + fill === ids.length && onePerSeries(ids);
+const giantsIn = (ids) => ids.filter((id) => SPEC.hunter.rule.giants.includes(id)).length;
+/** The weights the data gives a group's cards: 1 + the official drafts of that group the card appeared in. */
+function expectedWeights(g, drafts) {
+  return g.cards.map((id) => 1 + drafts.filter((d) => d.ids.includes(id)).length);
 }
 
 /** Bounty drafts generated for `modeId` at `round` over `seeds` seeds. */
@@ -91,13 +74,23 @@ function drafts(modeId, round, seeds, data = DATA) {
   return out;
 }
 
+/** An unseen-slot R3 set (`rule`): two-battle cards of its series, I I I II II III, ≤ perSeries a series, the III preferred. */
+function initialRule(ids) {
+  const r = SPEC.initial.rule;
+  const series = ids.map((id) => CARD.get(id).series);
+  return ids.length === 6 && ids.every((id) => CARD.get(id).draftPool === 'initial' && r.series.includes(CARD.get(id).series))
+    && series.every((s) => series.filter((x) => x === s).length <= r.perSeries) && tiersOf(ids) === r.tiers.slice().sort().join('')
+    && ids.some((id) => r.prefer.includes(id));
+}
+
 test('#2 screenshots → data: every card read is one act2autochess (下半) effect, whose enemy_id is the enemy the card brings', (t) => {
   const seen = new Set();
   for (const d of officialDrafts()) for (const id of d.ids || []) seen.add(id);
-  assert.equal(seen.size, 72, 'distinct cards in the 27 bounty drafts: 36 at R3, 20 at R9, 16 at R11');
+  assert.equal(seen.size, 81, 'distinct cards in the 59 bounty drafts: 40 at R3, 20 at R9, 21 at R11');
   // the R3(1) question: the title names category and tier only — two different 悬赏·损伤I cards, each with its own enemy
   assert.equal(resolve(['悬赏·损伤I', '临时收音师', 1, 2]), 'enemyeffect_18_1');
   assert.equal(resolve(['悬赏·损伤I', '底海滑动者', 1, 2]), 'enemyeffect_12_4');
+  assert.equal(resolve(['悬赏·持续I', '萨卡兹枯朽战士', 1, 2]), 'enemyeffect_20_1', 'not 萨卡兹枯朽战士组长 (13_4)');
   assert.equal(CARD.get('enemyeffect_18_1').enemyKey, 'enemy_10094_crstf');
   assert.equal(CARD.get('enemyeffect_12_4').enemyKey, 'enemy_1148_dssbr');
   const p = new URL('../../.cache/gamedata/excel/activity_table.json', import.meta.url);
@@ -112,40 +105,47 @@ test('#2 screenshots → data: every card read is one act2autochess (下半) eff
     assert.ok(seen.has(id) && !act.act1autochess.effectInfoDataDict[id], `${id} is 下半-only`);
   }
   assert.match(act.act1autochess.effectInfoDataDict.enemyeffect_11_6.effectDesc, /沉沙/);
+  // all 22 matches are one season: 终极 (mode_multi_abyss) opened on 2026-03-27 16:00 (UTC+8), before the end-of-March videos
+  assert.equal(act.act2autochess.modeDataDict.mode_multi_abyss.startTime, Date.UTC(2026, 2, 27, 8) / 1000);
 });
 
-test('#2 R3 (11 of 11 official drafts): one of the official sets of six "接下来两场作战" cards, 3 × I + 2 × II + 1 × III', () => {
+test('#2 R3 (22 of 22 official drafts): one of the official sets of six "接下来两场作战" cards, 3 × I + 2 × II + 1 × III — 9 of the 10 seen', () => {
   const r3 = officialDrafts().filter((d) => d.round === 3);
-  assert.equal(r3.length, 11);
-  const hits = SPEC.initial.sets.map(() => 0);
+  assert.equal(r3.length, 22);
+  const hits = SPEC.initial.groups.map(() => []);
   for (const d of r3) {
     assert.equal(d.family, 'bounty', `${d.where}: R3 is a 悬赏决策`);
     assert.ok(d.ids.every((id) => CARD.get(id).rounds === 2 && CARD.get(id).draftPool === 'initial'), `${d.where}: two-battle cards`);
     assert.equal(tiersOf(d.ids), '111223', `${d.where}: tiers`);
     assert.ok(d.ids.every((id) => !isBoss(CARD.get(id).enemyKey)), `${d.where}: no boss`);
-    const fit = initialFit(d.ids);
-    assert.match(fit || '', /^set:/, `${d.where}: a seen set`);
-    hits[Number(fit.slice(4))]++;
+    const i = SPEC.initial.groups.findIndex((s) => sameSet(s.cards, d.ids));
+    assert.ok(i >= 0, `${d.where}: a seen set`);
+    hits[i].push(d.match);
   }
-  assert.deepEqual(hits, [4, 1, 1, 2, 1, 1, 1], 'series 18 ×4, 19, 17, the 10_5… set ×2, three more mixed sets');
-  // each seen set is a whole series 17 / 18 / 19 or follows the rule the unseen slots are built by
-  for (const s of SPEC.initial.sets) {
-    const series = new Set(s.cards.map((id) => CARD.get(id).series));
-    assert.ok(series.size === 1 ? [17, 18, 19].includes([...series][0]) && s.cards.length === 6 : mixedRule(s.cards), s.cards.join());
-    assert.equal(tiersOf(s.cards), '111223');
-  }
-  assert.equal(SPEC.initial.slots, 10, 'enemy_initial_1..10');
+  assert.deepEqual(hits, SPEC.initial.groups.map((s) => s.seen), 'each set\'s `seen` lists the matches it came in');
+  assert.deepEqual(hits.map((x) => x.length), [5, 3, 2, 3, 2, 1, 2, 1, 3]);
+  // hand-made sets, not one card per series: two series-20 cards (match 12), a series-17 card among faction cards (13 / 19 / 21)
+  assert.deepEqual(SPEC.initial.groups[7].cards.filter((id) => CARD.get(id).series === 20), [EE('20_1'), EE('20_5')]);
+  assert.ok(SPEC.initial.groups[8].cards.includes(EE('17_6')));
+  for (const s of SPEC.initial.groups) assert.equal(tiersOf(s.cards), '111223', s.cards.join());
+  assert.equal(SPEC.initial.slots, 10, 'enemy_initial_1..10: one unseen');
+  assert.equal(SPEC.initial.pick, 'slot');
+  // the only two-battle cards no draft showed are the unseen set's preferred tier-III cards
+  const shown = new Set(r3.flatMap((d) => d.ids));
+  assert.deepEqual(CARDS.filter((c) => c.draftPool === 'initial' && !shown.has(c.effectId)).map((c) => c.effectId), SPEC.initial.rule.prefer);
+  assert.ok(SPEC.initial.rule.prefer.every((id) => CARD.get(id).tier === 3));
 });
 
-test('#2 R3 generated: a seen set or an unseen-slot set (one card from each of 6 of the series 10–15 / 20, I I I II II III) — every seen set comes up, the unseen slots about 3 in 10', () => {
+test('#2 R3 generated: a seen set (all six cards) or the unseen 10th set — every seen set comes up, the unseen one about 1 in 10', () => {
   const counts = new Map();
   let n = 0;
   for (const modeId of COOP_BOUNTY_MODES) {
     for (const round of DATA.choices.schedule[modeId].spRounds.filter((r) => bountyDraftKind(r) === 'initial')) {
-      for (const d of drafts(modeId, round, modeId === 'mode_multi_hard' ? 400 : 60)) {
+      for (const d of drafts(modeId, round, modeId === 'mode_multi_hard' ? 600 : 60)) {
         const ids = d.cards.map((c) => c.id);
         assert.equal(new Set(ids).size, 6, 'six different cards');
-        const fit = initialFit(ids);
+        const i = SPEC.initial.groups.findIndex((s) => sameSet(s.cards, ids));
+        const fit = i >= 0 ? `set:${i}` : initialRule(ids) ? 'rule' : null;
         assert.ok(fit, `${modeId} R${round}: ${d.cards.map((c) => c.name).join(', ')}`);
         assert.ok(d.cards.every((c) => c.rounds === 2 && !isBoss(c.enemyKey)), 'two-battle cards, no boss');
         assert.match(d.eventId, /^enemy_initial_\d+$/);
@@ -153,9 +153,9 @@ test('#2 R3 generated: a seen set or an unseen-slot set (one card from each of 6
       }
     }
   }
-  for (let i = 0; i < SPEC.initial.sets.length; i++) assert.ok(counts.get(`set:${i}`) > 0, `set ${i} offered`);
-  const mixed = (counts.get('mixed') || 0) / n;
-  assert.ok(mixed > 0.2 && mixed < 0.4, `unseen-slot sets ${(mixed * 100).toFixed(0)} %`);
+  for (let i = 0; i < SPEC.initial.groups.length; i++) assert.ok(counts.get(`set:${i}`) > 0, `set ${i} offered`);
+  const rule = (counts.get('rule') || 0) / n;
+  assert.ok(rule > 0.05 && rule < 0.16, `unseen-set drafts ${(rule * 100).toFixed(0)} %`);
   // solo: 3 cards of such a set
   for (const d of drafts('mode_single_hard', 3, 40)) {
     assert.equal(d.cards.length, 3);
@@ -163,88 +163,125 @@ test('#2 R3 generated: a seen set or an unseen-slot set (one card from each of 6
   }
 });
 
-test('#2 R9 (12 of 12 official drafts): boss bounties + 源石虫·特训 — a group of named bosses always together, filled to 6 with the cheap ones', () => {
+test('#2 R9 (23 official drafts): six groups of 9 boss bounties / 源石虫·特训, 6 cards each — 庞贝 and 鼠王 never together, the 鼠王 group in 14 of 22 matches', () => {
   const r9 = officialDrafts().filter((d) => d.round === 9);
-  assert.equal(r9.length, 12, '11 matches + the Bahamut co-op screenshot');
-  const hits = SPEC.boss.templates.map(() => 0);
+  assert.equal(r9.length, 23, '22 matches + the Bahamut co-op screenshot');
+  const B = SPEC.boss;
+  assert.equal(B.groups.length, B.events.length, 'one group per bossInitial event');
   for (const d of r9) {
     assert.equal(d.family, 'bounty', `${d.where}: R9 is a 悬赏决策`);
     assert.ok(d.ids.every((id) => CARD.get(id).draftPool === 'boss' && CARD.get(id).rounds === 1), `${d.where}: boss bounties / 源石虫·特训, 下场作战`);
-    const fits = bossFits(d.ids);
-    assert.equal(fits.length, 1, `${d.where}: fits exactly one seen group (${fits.join(', ')})`);
-    hits[fits[0]]++;
+    const g = groupOf(B, d);
+    assert.equal(g.length, 1, `${d.where}: listed by one group`);
+    assert.ok(subset(d.ids, g[0].cards), `${d.where}: six cards of its group`);
+    assert.ok(!(d.ids.includes(EE('b_12')) && d.ids.includes(EE('b_11'))), `${d.where}: 庞贝 and 鼠王 never together`);
   }
-  assert.ok(hits.every((x) => x > 0), `every group seen (${hits.join(' ')})`);
-  for (const d of drafts('mode_multi_abyss', 9, 300)) {
+  for (const g of B.groups) {
+    const ds = r9.filter((d) => g.seen.includes(d.match));
+    assert.equal(ds.length, g.seen.length, `${g.cards.join(' ')}: every match it lists`);
+    assert.deepEqual(g.weights, expectedWeights(g, ds), `${g.cards.join(' ')}: weights = 1 + the drafts each card showed in`);
+    // every group seen in 3 or more drafts shows exactly 9 different cards — the list
+    if (ds.length >= 3) assert.ok(sameSet([...new Set(ds.flatMap((d) => d.ids))], g.cards) && g.cards.length === 9, `${g.cards.join(' ')}: the 9 cards its drafts show`);
+  }
+  // a named boss does not always come with its partners: 杰斯顿 alone (12, 15, 21); 复仇者 + 百夫长 without 邪魔的利刃 (20)
+  const named = (d) => d.ids.filter((id) => ['b_9', 'b_14', 'b_23'].map(EE).includes(id));
+  for (const m of [12, 15, 21]) assert.deepEqual(named(r9.find((d) => d.match === m)), [EE('b_9')], `match ${m}`);
+  const m20 = r9.find((d) => d.match === 20).ids;
+  assert.ok(m20.includes(EE('b_21')) && m20.includes(EE('b_2')) && !m20.includes(EE('b_22')));
+  // the 鼠王 group: 14 of 22 matches, every match on the dark grey board (7 of 7) — something of the match picks the group
+  const rat = B.groups.find((g) => g.cards.includes(EE('b_11')));
+  assert.equal(rat.seen.length, 14);
+  for (const m of OFFICIAL.boards.grey) assert.ok(rat.seen.includes(m), `match ${m} (grey board): the 鼠王 group`);
+  assert.equal(B.pick, 'seen');
+  // generated: six different cards of one group; the 鼠王 group about 14 / 22; every card of every group offered
+  const offered = new Set();
+  let ratN = 0;
+  const gen = drafts('mode_multi_abyss', 9, 1500);
+  for (const d of gen) {
     const ids = d.cards.map((c) => c.id);
     assert.equal(new Set(ids).size, 6);
-    assert.ok(bossFits(ids).length > 0, ids.join(', '));
+    assert.ok(B.groups.some((g) => subset(ids, g.cards)), ids.join(', '));
+    assert.ok(!(ids.includes(EE('b_12')) && ids.includes(EE('b_11'))), '庞贝 and 鼠王 never together');
     assert.match(d.eventId, /^bossInitial_\d+$/);
+    if (ids.some((id) => ['b_11', 'b_9', 'b_14', 'b_23'].map(EE).includes(id)) && subset(ids, rat.cards)) ratN++;
+    ids.forEach((id) => offered.add(id));
   }
-  const offered = new Set(drafts('mode_multi_hard', 9, 300).flatMap((d) => d.cards.map((c) => c.id)));
-  for (const t of SPEC.boss.templates) for (const id of t.featured) assert.ok(offered.has(id), `${CARD.get(id).name} offered`);
+  assert.ok(ratN / gen.length > 0.55 && ratN / gen.length < 0.73, `the 鼠王 group ${(100 * ratN / gen.length).toFixed(0)} %`);
+  for (const g of B.groups) for (const id of g.cards) assert.ok(offered.has(id), `${CARD.get(id).name} offered`);
   for (const id of ['enemyeffect_b_6', 'enemyeffect_b_7', 'enemyeffect_b_15', 'enemyeffect_b_16', 'enemyeffect_b_18']) {
     assert.equal(CARD.get(id).draftExcluded, 'unseen', `${CARD.get(id).name}: in no official R9 draft`);
     assert.ok(!offered.has(id));
   }
 });
 
-test('#2 R11 (11 matches: 悬赏决策 5, 机密商店 4, 战术决策 2, 道具补给 0): the families, and the bounty — a group (one 特异III giant + its tier-II cards, always together) + tier-I fill, one card per faction series', () => {
+test('#2 R11 (22 matches: 悬赏决策 14, 机密商店 4, 战术决策 4, 道具补给 0): the families, and the bounty — 6 of a list of 7 "下场战斗" cards, one per faction series', () => {
   const r11 = officialDrafts().filter((d) => d.round === 11);
   const fam = {};
   for (const d of r11) fam[d.family] = (fam[d.family] || 0) + 1;
-  assert.deepEqual(fam, { bounty: 5, shop: 4, tactic: 2 });
-  const hits = SPEC.hunter.templates.map(() => 0);
-  const byMatch = {};
-  for (const d of r11.filter((x) => x.family === 'bounty')) {
+  assert.deepEqual(fam, { bounty: 14, shop: 4, tactic: 4 });
+  const H = SPEC.hunter;
+  const bounty = r11.filter((x) => x.family === 'bounty');
+  for (const d of bounty) {
     assert.ok(d.ids.every((id) => CARD.get(id).draftPool === 'hunter' && CARD.get(id).rounds === 1), `${d.where}: R11 cards, 下场战斗`);
-    assert.ok(hunterShape(d.ids), `${d.where}: the shape the unseen slots are built by (${tiersOf(d.ids)})`);
-    const fits = hunterFits(d.ids);
-    assert.equal(fits.length, 1, `${d.where}: fits exactly one seen group (${fits.join(', ')})`);
-    hits[fits[0]]++;
-    byMatch[d.where.split(' ')[1]] = d.ids;
+    assert.ok(onePerSeries(d.ids), `${d.where}: one card per faction series`);
+    assert.ok(giantsIn(d.ids) <= 1, `${d.where}: at most one giant`);
+    const g = groupOf(H, d);
+    assert.equal(g.length, 1, `${d.where}: listed by one group`);
+    assert.ok(subset(d.ids, g[0].cards), `${d.where}: six cards of its group`);
   }
-  assert.deepEqual(hits, [2, 1, 1, 1], 'the 16_4 group in matches 1 and 6, three more groups once');
-  // the evidence against a free draw: matches 1 and 6 share the giant and all four tier-II cards, only the tier-I card differs
-  const shared = byMatch['1'].filter((id) => byMatch['6'].includes(id));
-  assert.equal(shared.length, 5);
-  assert.deepEqual(byMatch['1'].filter((id) => !shared.includes(id)).concat(byMatch['6'].filter((id) => !shared.includes(id))).map((id) => CARD.get(id).tier), [1, 1]);
-  for (const id of ['enemyeffect_10_8', 'enemyeffect_11_8', 'enemyeffect_12_8']) assert.ok(!Object.values(byMatch).flat().includes(id), `${id} in no official R11 draft`);
+  assert.equal(bounty.filter((d) => giantsIn(d.ids) === 1).length, 13, 'a giant in 13 of 14 (not match 15)');
+  for (const g of H.groups) {
+    const ds = bounty.filter((d) => g.seen.includes(d.match));
+    assert.equal(ds.length, g.seen.length);
+    assert.equal(g.cards.length + (g.open || 0), H.rule.size, `${g.cards.join(' ')}: a list of 7`);
+    assert.deepEqual(g.weights, expectedWeights(g, ds), `${g.cards.join(' ')}: weights = 1 + hits`);
+    assert.ok(sameSet([...new Set(ds.flatMap((d) => d.ids))], g.cards), `${g.cards.join(' ')}: the cards its drafts show`);
+    assert.ok(onePerSeries(g.cards) && giantsIn(g.cards) <= 1);
+    if (!giantsIn(g.cards)) assert.equal(g.open, 1, 'a list showing no giant gets one by the rule');
+  }
+  // the evidence for lists of 7: the 16_4 group's four drafts each leave out a different one of the same 7 cards
+  const big = H.groups.find((g) => g.cards.includes(EE('16_4')));
+  const left = bounty.filter((d) => big.seen.includes(d.match)).map((d) => big.cards.find((id) => !d.ids.includes(id)));
+  assert.equal(new Set(left).size, 4, left.join(' '));
+  assert.equal(H.groups.filter((g) => !g.open).length, 3, 'three groups seen whole');
+  assert.deepEqual(CARDS.filter((c) => c.draftPool === 'hunter' && !bounty.some((d) => d.ids.includes(c.effectId))).map((c) => c.effectId),
+    ['12_8', '16_2', '16_6'].map(EE), 'R11 cards no draft showed');
   for (const modeId of ['mode_multi_hard', 'mode_multi_abyss', 'mode_single_hard', 'mode_single_abyss']) {
     const sch = DATA.choices.schedule[modeId].rounds['11'];
-    assert.deepEqual(sch.families.map((f) => f.family).sort(), ['bounty', 'shop', 'tactic'], `${modeId} R11 (solo: extrapolated from co-op, [ASSUMED])`);
+    assert.deepEqual(sch.families, [{ family: 'bounty', weight: 14 }, { family: 'shop', weight: 4 }, { family: 'tactic', weight: 4 }], `${modeId} R11 (solo: extrapolated from co-op, [ASSUMED])`);
     assert.equal(sch.bountyDraft, 'hunter');
     assert.equal(sch.assumed, true);
   }
-  assert.equal(SPEC.hunter.slots, 15, 'bounty_hunter_1..15');
-  // generated: a seen group (about 4 in 15) or a group of the same shape; every seen group and every R11 card comes up
+  assert.equal(H.slots, 15, 'bounty_hunter_1..15');
+  // generated: six different cards, one per faction series, at most one giant; a seen group about 7 in 15; every R11
+  // card comes up (the unseen ones through the rule)
   const gd = new GameData(DATA, 'mode_multi_hard');
   const seen = {};
-  const groups = SPEC.hunter.templates.map(() => 0);
   const offered = new Set();
-  let bounty = 0;
+  let n = 0;
   let fitSeen = 0;
-  for (let seed = 1; seed <= 1500; seed++) {
+  let giants = 0;
+  for (let seed = 1; seed <= 2000; seed++) {
     const d = generateDraft(gd, createRng(seed * 13 + 11), 11, { stageId: 'act2autochess_m01' });
     seen[d.family] = (seen[d.family] || 0) + 1;
     if (d.family !== 'bounty') continue;
     const ids = d.cards.map((c) => c.id);
     assert.equal(new Set(ids).size, 6);
-    assert.ok(hunterShape(ids), d.cards.map((c) => c.name).join(', '));
+    assert.ok(ids.every((id) => CARD.get(id).draftPool === 'hunter') && onePerSeries(ids) && giantsIn(ids) <= 1, d.cards.map((c) => c.name).join(', '));
     assert.match(d.eventId, /^bounty_hunter_\d+$/);
-    const fits = hunterFits(ids);
-    if (fits.length) { fitSeen++; groups[fits[0]]++; }
-    bounty++;
+    if (H.groups.some((g) => !g.open && subset(ids, g.cards))) fitSeen++;
+    giants += giantsIn(ids);
+    n++;
     ids.forEach((id) => offered.add(id));
   }
   assert.deepEqual(Object.keys(seen).sort(), ['bounty', 'shop', 'tactic'], 'no 道具补给 at R11');
-  assert.ok(seen.bounty > seen.shop && seen.shop > seen.tactic, JSON.stringify(seen));
-  assert.ok(groups.every((x) => x > 0), `every seen group offered (${groups.join(' ')})`);
-  assert.ok(fitSeen / bounty > 0.17 && fitSeen / bounty < 0.4, `seen groups ${(100 * fitSeen / bounty).toFixed(0)} % of ${bounty}`);
+  assert.ok(seen.bounty / 2000 > 0.56 && seen.bounty / 2000 < 0.71, JSON.stringify(seen));
+  assert.ok(fitSeen / n > 0.13 && fitSeen / n < 0.27, `drafts of the three whole seen groups ${(100 * fitSeen / n).toFixed(0)} % (3 / 15)`);
+  assert.ok(giants / n > 0.78 && giants / n < 0.93, `a giant in ${(100 * giants / n).toFixed(0)} % (official 13 / 14)`);
   for (const c of CARDS.filter((x) => x.draftPool === 'hunter')) assert.ok(offered.has(c.effectId), `${c.effectId} ${c.name} offered at R11`);
 });
 
-test('#2 never offered by a draft (in none of the 27 official bounty drafts): multi-round cards, enemyeffect_3_*, 战术特训, the 鸭爵 set', () => {
+test('#2 never offered by a draft (in none of the 59 official bounty drafts): multi-round cards, enemyeffect_3_*, 战术特训, the 鸭爵 set', () => {
   const reasons = {};
   for (const c of CARDS) {
     if (!c.draft) reasons[c.draftExcluded] = (reasons[c.draftExcluded] || 0) + 1;
@@ -288,7 +325,8 @@ test('#2 E2E (co-op 绝境, the players\' case): the real R3 draft is an officia
     assert.ok(h.drive(() => m.phase === PHASE.SP_DRAFT && m.round === 3, { ready: true }), 'the R3 draft');
     assert.equal(m.sp.family, 'bounty', 'R3 of 绝境 is always a bounty draft');
     const names = m.sp.cards.map((c) => c.name).join(', ');
-    assert.ok(initialFit(m.sp.cards.map((c) => c.id)), `seed ${seed}: ${names}`);
+    const ids = m.sp.cards.map((c) => c.id);
+    assert.ok(SPEC.initial.groups.some((g) => sameSet(g.cards, ids)) || initialRule(ids), `seed ${seed}: ${names}`);
     for (const c of m.sp.cards) assert.ok(!isBoss(c.enemyKey), `seed ${seed}: ${c.name} is a boss bounty`);
     assert.equal(m.publicView().sp.cards.length, m.sp.cards.length);
     // the human takes a card when its turn comes; the bot picks by itself

test/match/feedback1-secret-shop.test.js

@@ -0,0 +1,102 @@
+// The 机密商店 after the official screenshots (the user, after the R3 / R9 / R11 screenshots of 22 official matches:
+// "机密商店按官方改成可以重复吧"). The 4 official 机密商店 (R11 of matches 2, 4, 5 and 8 in
+// test/fixtures/official-bounty-drafts.json) offer the same item twice (盟约之币 ×2 in 4 and 5, 变形同构体 ×2 in 8) and
+// share one composition: exactly two tier-VI items, at least one tier V, at least one 盟约之币, no other tier-I / II item.
+// choices.json `shopDraft` (tools/build-data.mjs SHOP_DRAFT) draws six slots on their own, with replacement; picking one
+// of two identical cards is in test/content/choices.test.js (E2E), the overlay with two identical cards in
+// test/ui/feedback1-secret-shop.test.js.
+import { test } from 'node:test';
+import assert from 'node:assert/strict';
+import { readFileSync } from 'node:fs';
+import { DATA } from './harness.js';
+import { GameData } from '../../server/match/gamedata.js';
+import { generateDraft, cardView } from '../../server/match/choices.js';
+import { createRng } from '../../server/sim/rng.js';
+
+const OFFICIAL = JSON.parse(readFileSync(new URL('../fixtures/official-bounty-drafts.json', import.meta.url), 'utf8'));
+const SHOP = DATA.choices.shopDraft;
+const COIN = SHOP.coin;
+const itemByName = (name) => Object.values(DATA.items).find((i) => i.name === name && !i.isGolden && i.itemType === 'EQUIP');
+/** The official 机密商店: [{ match, cards: [[name, tier]] }]. */
+const SHOPS = Object.entries(OFFICIAL.matches).flatMap(([m, rs]) => Object.values(rs).filter((d) => d.family === 'shop').map((d) => ({ match: Number(m), cards: d.cards })));
+const count = (list, pred) => list.filter(pred).length;
+
+test('机密商店 (4 official shops): six free items, two of them tier VI, a tier V and a 盟约之币 in each, the same item twice in three', () => {
+  assert.deepEqual(SHOPS.map((s) => s.match), [2, 4, 5, 8]);
+  assert.deepEqual(SHOP.seen, [2, 4, 5, 8]);
+  let dupShops = 0;
+  for (const { match, cards } of SHOPS) {
+    assert.equal(cards.length, 6, `match ${match}`);
+    for (const [name, tier] of cards) assert.equal(itemByName(name)?.tier, tier, `match ${match}: ${name} is tier ${tier} in the data`);
+    assert.equal(count(cards, ([, t]) => t === 6), 2, `match ${match}: exactly two tier-VI items`);
+    assert.ok(count(cards, ([, t]) => t === 5) >= 1, `match ${match}: a tier-V item`);
+    assert.ok(count(cards, ([n]) => n === '盟约之币') >= 1, `match ${match}: a 盟约之币`);
+    assert.ok(cards.every(([n, t]) => t >= 3 || n === '盟约之币'), `match ${match}: no other tier-I / II item`);
+    if (new Set(cards.map(([n]) => n)).size < cards.length) dupShops++;
+  }
+  assert.equal(dupShops, 3, '盟约之币 ×2 (matches 4, 5), 变形同构体 ×2 (match 8)');
+  // the data: four fixed slots (VI, VI, V, 盟约之币) + two drawn by what the other two cards of each shop were
+  assert.equal(DATA.items[COIN].name, '盟约之币');
+  assert.deepEqual(SHOP.slots.slice(0, 4), [{ 6: 1 }, { 6: 1 }, { 5: 1 }, { coin: 1 }]);
+  const rest = { 3: 0, 4: 0, 5: 0, coin: 0 };
+  for (const { cards } of SHOPS) {
+    const left = cards.map(([n, t]) => (n === '盟约之币' ? 'coin' : String(t)));
+    for (const k of ['6', '6', '5', 'coin']) left.splice(left.indexOf(k), 1);
+    for (const k of left) rest[k]++;
+  }
+  assert.deepEqual(rest, { 3: 1, 4: 2, 5: 3, coin: 2 });
+  for (const s of SHOP.slots.slice(4)) assert.deepEqual(s, rest);
+  assert.equal(SHOP.slots.length, 6);
+  // an item's weight within its tier: 1 + the official cards it showed on
+  const seen = {};
+  for (const { cards } of SHOPS) for (const [n] of cards) if (n !== '盟约之币') seen[itemByName(n).id] = (seen[itemByName(n).id] || 0) + 1;
+  assert.deepEqual(SHOP.itemWeights, Object.fromEntries(Object.entries(seen).map(([id, k]) => [id, 1 + k]).sort()));
+  assert.equal(SHOP.itemWeights[itemByName('变形同构体').id], 5, '变形同构体 on 4 of the 8 tier-VI cards');
+});
+
+test('机密商店 generated (co-op 绝境 R11): the official composition, drawn with replacement — the same item can come twice', () => {
+  const gd = new GameData(DATA, 'mode_multi_hard');
+  let shops = 0;
+  let dup = 0;
+  let dupItem = 0;
+  let coins2 = 0;
+  const offered = new Set();
+  for (let seed = 1; shops < 2000 && seed < 20000; seed++) {
+    const d = generateDraft(gd, createRng(seed * 104729 + 7), 11, { stageId: 'act2autochess_m01' });
+    if (d.family !== 'shop') continue;
+    shops++;
+    assert.equal(d.name, '机密商店');
+    assert.equal(d.cards.length, 6);
+    const tiers = d.cards.map((c) => DATA.items[c.id].tier);
+    assert.equal(count(tiers, (t) => t === 6), 2, 'two tier-VI items');
+    assert.ok(count(tiers, (t) => t === 5) >= 1, 'a tier-V item');
+    assert.ok(count(d.cards, (c) => c.id === COIN) >= 1, 'a 盟约之币');
+    assert.ok(d.cards.every((c) => c.id === COIN || DATA.items[c.id].tier >= 3), 'no other tier-I / II item');
+    assert.deepEqual(d.cards.map((c) => c.idx), [0, 1, 2, 3, 4, 5], 'each card its own index');
+    for (const c of d.cards) {
+      assert.equal(c.kind, 'item');
+      assert.equal(cardView(c).price, 0, '无需消耗资金');
+      assert.ok(!DATA.items[c.id].isGolden && !DATA.items[c.id].shopExcluded);
+      offered.add(c.id);
+    }
+    const ids = d.cards.map((c) => c.id);
+    if (new Set(ids).size < ids.length) dup++;
+    if (new Set(ids.filter((id) => id !== COIN)).size < count(ids, (id) => id !== COIN)) dupItem++;
+    if (count(ids, (id) => id === COIN) >= 2) coins2++;
+  }
+  assert.equal(shops, 2000);
+  assert.ok(dup / shops > 0.45 && dup / shops < 0.75, `a repeated item in ${(100 * dup / shops).toFixed(0)} % (official 3 of 4)`);
+  assert.ok(coins2 / shops > 0.35 && coins2 / shops < 0.55, `盟约之币 ×2 in ${(100 * coins2 / shops).toFixed(0)} % (official 2 of 4)`);
+  assert.ok(dupItem / shops > 0.08, `another item twice in ${(100 * dupItem / shops).toFixed(0)} % (official: 变形同构体 ×2)`);
+  // every shop item of tiers III–VI can come
+  for (const t of [3, 4, 5, 6]) for (const id of gd.shopItemsByTier[t]) assert.ok(offered.has(id), `${DATA.items[id].name} (tier ${t}) offered`);
+  // solo: 3 of the slots
+  const solo = new GameData(DATA, 'mode_single_hard');
+  for (let seed = 1, n = 0; n < 30 && seed < 5000; seed++) {
+    const d = generateDraft(solo, createRng(seed * 31 + 5), 11, {});
+    if (d.family !== 'shop') continue;
+    n++;
+    assert.equal(d.cards.length, 3);
+    assert.ok(d.cards.every((c) => c.id === COIN || DATA.items[c.id].tier >= 3));
+  }
+});

test/match/playtest6-matchflow.test.js

@@ -109,7 +109,7 @@ test('#19 a tier short of different operators: the offer tops up from the tier b
 // v2.4.1 drafted 战术特训 (only 法术教鞭 makes those) and the hidden 鸭爵 set, put one or more multi-round "之后 / 后续的每场
 // 作战" cards in about half of the co-op R3 drafts and showed every card as plain text, so a "每场" card looked like a
 // "下场" one. Now: no 战术特训 / 鸭爵 set (战术特训 is the 教鞭 Art's, test/content/items.test.js); since player feedback
-// #2 the drafts follow the 33 official screenshots (test/match/feedback1-bounty.test.js), where no multi-round card
+// #2 the drafts follow the 66 official screenshots (test/match/feedback1-bounty.test.js), where no multi-round card
 // appears; each card names its battles in the official colours (blue "下场作战" / "两场作战", red "每场"); a 1–2-battle
 // bounty stops after its battles; a multi-round card (教鞭's 法术大师A2·多轮战术特训) lasts two battles.
 
@@ -161,9 +161,9 @@ test('#4 data: cards.bounty marks the draft pool — 战术特训 (教鞭), the
   assert.equal(list.filter((c) => c.draft).length, 86);
   const multi = list.filter((c) => c.rounds >= 99 && c.payout === 'kill');
   assert.equal(multi.length, 7, '多轮悬赏 · 假想敌 ×6 + 山海众头目·多轮悬赏');
-  assert.ok(multi.every((c) => !c.draft && c.draftExcluded === 'unseen'), 'in none of the 27 official bounty drafts');
+  assert.ok(multi.every((c) => !c.draft && c.draftExcluded === 'unseen'), 'in none of the 59 official bounty drafts');
   const slime = list.find((c) => c.effectId === 'enemyeffect_5_1');
-  assert.ok(slime.draft && slime.draftPool === 'boss', '源石虫·特训 is an R9 card (8 of the 11 official R9 drafts)');
+  assert.ok(slime.draft && slime.draftPool === 'boss', '源石虫·特训 is an R9 card (16 of the 23 official R9 drafts)');
 });
 
 /** Drive a co-op 绝境 match to its R3 bounty draft; the human takes the first free card `want(card, free)` accepts. */

test/ui/feedback1-secret-shop.e2e.test.js

@@ -0,0 +1,83 @@
+// The 机密商店 overlay with the same item twice, in headless Chrome (puppeteer-core + system Chrome) through the mock
+// harness (public/dev/game-mock.html ?phase=SP_DRAFT&variant=shop: the official 机密商店 of match 8 R11 — 变形同构体 in
+// slots 1 and 4). Opt-in: SP_E2E=1.
+//
+//   SP_E2E=1 node --test test/ui/feedback1-secret-shop.e2e.test.js
+//
+// Two identical cards render as two cards; a teammate taking the first leaves the second pickable; two taps on the
+// second pick it — its own index goes to the server (g.choice), only it shows my avatar. Screenshots:
+// test/e2e/out/fb1-secret-shop-*.png.
+import { test, describe, before, after } from 'node:test';
+import assert from 'node:assert/strict';
+import { existsSync, mkdirSync } from 'node:fs';
+import path from 'node:path';
+import { fileURLToPath } from 'node:url';
+
+const ROOT = path.resolve(path.dirname(fileURLToPath(import.meta.url)), '../..');
+const OUT = path.join(ROOT, 'test/e2e/out');
+const CHROME = process.env.CHROME_PATH || '/Applications/Google Chrome.app/Contents/MacOS/Google Chrome';
+const ENABLED = process.env.SP_E2E === '1' && existsSync(CHROME);
+const sleep = (ms) => new Promise((r) => setTimeout(r, ms));
+
+describe('机密商店: the same item twice (mock harness, headless Chrome)', { skip: !ENABLED && 'set SP_E2E=1 (and have Chrome) to run' }, () => {
+  let srv;
+  let browser;
+  let base;
+
+  before(async () => {
+    const { startServer } = await import('../../server/index.js');
+    const puppeteer = (await import('puppeteer-core')).default;
+    srv = await startServer({ port: 0, host: '127.0.0.1', quiet: true });
+    base = `http://127.0.0.1:${srv.port}`;
+    browser = await puppeteer.launch({ executablePath: CHROME, headless: true, args: ['--no-sandbox'] });
+    mkdirSync(OUT, { recursive: true });
+  });
+
+  after(async () => {
+    await browser?.close();
+    await srv?.close();
+  });
+
+  const cards = (page) => page.$$eval('.spov__grid .spcard', (els) => els.map((c) => ({
+    name: c.querySelector('.spcard__name')?.textContent, taken: c.classList.contains('is-taken'), mine: c.classList.contains('is-mine'),
+    armed: c.classList.contains('is-armed'), disabled: c.disabled, badge: !!c.querySelector('.spcard__taker'),
+  })));
+
+  for (const [name, w, h, touch] of [['756x366', 756, 366, true], ['1920x1080', 1920, 1080, false]]) {
+    test(`${name}: two 变形同构体 are two cards; the second stays pickable after the first is taken, and picking it sends its own index`, { timeout: 120000 }, async () => {
+      const page = await browser.newPage();
+      await page.setViewport({ width: w, height: h, deviceScaleFactor: 1, isMobile: touch, hasTouch: touch });
+      const problems = [];
+      page.on('pageerror', (e) => problems.push(`pageerror: ${e.message}`));
+      page.on('console', (m) => { if (m.type() === 'error') problems.push(`console: ${m.text()}`); });
+      await page.goto(`${base}/dev/game-mock.html?shot=1&phase=SP_DRAFT&variant=shop`, { waitUntil: 'networkidle0' });
+      await page.waitForSelector('.spov__grid .spcard', { timeout: 20000 });
+      await sleep(600);
+      // the teammate p4 has taken the first 变形同构体 (slot 0)
+      await page.evaluate(() => { const S = globalThis.__MOCK__.S(); S.pub.sp = { ...S.pub.sp, picks: { p4: 0 }, turn: 'p1' }; globalThis.__MOCK__.pushPublic(); });
+      await sleep(300);
+      let c = await cards(page);
+      assert.equal(c.length, 6);
+      assert.equal(c[0].name, '变形同构体');
+      assert.equal(c[3].name, '变形同构体');
+      assert.ok(c[0].taken && c[0].badge && c[0].disabled, 'the first twin: taken, with the taker\'s avatar');
+      assert.ok(!c[3].taken && !c[3].badge && !c[3].disabled, 'the second twin: free');
+      await page.screenshot({ path: path.join(OUT, `fb1-secret-shop-${name}.png`) });
+      // two taps on the second twin
+      const tap = async (i) => { const btn = (await page.$$('.spov__grid .spcard'))[i]; if (touch) await btn.tap(); else await btn.click(); await sleep(250); };
+      await tap(3);
+      c = await cards(page);
+      assert.deepEqual(c.map((x) => x.armed), [false, false, false, true, false, false], 'only the tapped twin is armed');
+      await page.screenshot({ path: path.join(OUT, `fb1-secret-shop-${name}-armed.png`) });
+      await tap(3);
+      const picks = await page.evaluate(() => ({ ...globalThis.__MOCK__.S().pub.sp.picks }));
+      assert.deepEqual(picks, { p4: 0, p1: 3 }, 'g.choice sent the second twin\'s index');
+      await sleep(250);
+      c = await cards(page);
+      assert.ok(c[3].mine && c[3].badge, 'the second twin is mine');
+      assert.ok(c[0].taken && !c[0].mine, 'the first twin stays the teammate\'s');
+      assert.deepEqual(problems, []);
+      await page.close();
+    });
+  }
+});

test/ui/feedback1-secret-shop.test.js

@@ -0,0 +1,96 @@
+// The 机密商店 overlay with the same item twice (the user: "机密商店按官方改成可以重复吧"; official match 8 R11: 变形同构体 ×2,
+// matches 4 / 5: 盟约之币 ×2). A real server draft (server/match/choices.js generateDraft → cardView), through m.public's
+// normalisation (ui/gameLogic.js normalizeSp), rendered by the overlay's pure view (ui/choiceOverlay.js ChoiceView): two
+// identical cards are two buttons keyed by their index — selecting one does not select the other, a teammate taking one
+// leaves the other pickable, and the pick sends that card's own index. The browser render is
+// test/ui/feedback1-secret-shop.e2e.test.js (SP_E2E=1).
+import { test } from 'node:test';
+import assert from 'node:assert/strict';
+import { readFileSync } from 'node:fs';
+import path from 'node:path';
+import { fileURLToPath } from 'node:url';
+
+const ROOT = path.resolve(path.dirname(fileURLToPath(import.meta.url)), '../..');
+
+// the browser data store reads the real data files from disk
+globalThis.fetch = async (url) => {
+  const name = String(url).split('/').pop();
+  try {
+    const body = readFileSync(path.join(ROOT, 'data', name), 'utf8');
+    return { ok: true, status: 200, json: async () => JSON.parse(body) };
+  } catch {
+    return { ok: false, status: 404, json: async () => ({}) };
+  }
+};
+
+const { ChoiceView, cardPickable, spTap, armedCard } = await import('../../public/js/ui/choiceOverlay.js');
+const { normalizeSp } = await import('../../public/js/ui/gameLogic.js');
+const { DATA } = await import('../match/harness.js');
+const { GameData } = await import('../../server/match/gamedata.js');
+const { generateDraft, cardView } = await import('../../server/match/choices.js');
+const { createRng } = await import('../../server/sim/rng.js');
+const { data } = await import('../../public/js/data.js');
+
+/** Every vnode of a preact tree (htm output), depth first. */
+function* walk(v) {
+  if (Array.isArray(v)) { for (const x of v) yield* walk(x); return; }
+  if (!v || typeof v !== 'object') return;
+  yield v;
+  yield* walk(v.props?.children);
+}
+const hasClass = (v, c) => typeof v?.props?.class === 'string' && v.props.class.split(/\s+/).includes(c);
+
+await data.loadAll('items', 'effects', 'choices', 'assets', 'chess', 'bonds');
+
+/** A generated co-op 绝境 R11 机密商店 with the same non-coin item twice. */
+function shopWithTwin() {
+  const gd = new GameData(DATA, 'mode_multi_hard');
+  const coin = DATA.choices.shopDraft.coin;
+  for (let seed = 1; seed < 50000; seed++) {
+    const d = generateDraft(gd, createRng(seed * 104729 + 7), 11, {});
+    if (d.family !== 'shop') continue;
+    const ids = d.cards.map((c) => c.id);
+    const twin = ids.find((id, i) => id !== coin && ids.indexOf(id) !== i);
+    if (twin) return { d, twin, at: ids.flatMap((id, i) => (id === twin ? [i] : [])) };
+  }
+  throw new Error('no generated shop with a repeated item');
+}
+
+test('机密商店 overlay: the same item twice is two cards — own keys, own selection, one taken leaves the other pickable', () => {
+  const { d, twin, at } = shopWithTwin();
+  const [a, b] = at;
+  const players = [{ playerId: 'me', seat: 0, name: 'Me' }, { playerId: 'p2', seat: 1, name: 'P2' }];
+  const pub = (picks) => normalizeSp({ family: 'shop', name: d.name, desc: d.desc, cards: d.cards.map(cardView), order: ['p2', 'me'], turn: Object.keys(picks).length ? 'me' : 'p2', picks, taken: {} }, players);
+  const view = (sp, armed = null) => [...walk(ChoiceView({ pub: { players, deadline: 0 }, sp, myId: 'me', solo: false, armed }))].filter((n) => hasClass(n, 'spcard'));
+
+  // before any pick: six buttons, keyed by index; the twins have the same name, icon and text
+  let sp = pub({});
+  let cards = view(sp);
+  assert.equal(cards.length, 6);
+  assert.deepEqual(cards.map((c) => c.key), [0, 1, 2, 3, 4, 5], 'keyed by index, never by item id');
+  const name = (c) => [...walk(c)].find((n) => hasClass(n, 'spcard__name')).props.children;
+  assert.equal(name(cards[a]), DATA.items[twin].name);
+  assert.equal(name(cards[b]), DATA.items[twin].name);
+  assert.equal(sp.cards[a].id, sp.cards[b].id);
+
+  // the teammate takes the first twin: only that card shows the taker; the second twin is still mine to pick
+  sp = pub({ p2: a });
+  assert.equal(sp.cards[a].takenBy, 'p2');
+  assert.equal(sp.cards[b].takenBy, null);
+  assert.equal(cardPickable(sp, sp.cards[a], { myId: 'me', solo: false }), false);
+  assert.equal(cardPickable(sp, sp.cards[b], { myId: 'me', solo: false }), true);
+  cards = view(sp);
+  assert.ok(hasClass(cards[a], 'is-taken') && !hasClass(cards[b], 'is-taken'));
+  assert.ok([...walk(cards[a])].some((n) => hasClass(n, 'spcard__taker')) && ![...walk(cards[b])].some((n) => hasClass(n, 'spcard__taker')));
+  assert.equal(cards[a].props.disabled, true);
+  assert.equal(cards[b].props.disabled, false);
+
+  // two taps on the second twin: it alone is armed, then its own index is sent
+  let r = spTap(null, b, cardPickable(sp, sp.cards[b], { myId: 'me', solo: false }));
+  assert.deepEqual(r, { armed: b, pick: null });
+  assert.equal(armedCard(r.armed, sp, { myId: 'me', solo: false }), b);
+  cards = view(sp, r.armed);
+  assert.deepEqual(cards.map((c) => hasClass(c, 'is-armed')), cards.map((_, i) => i === b), 'only the tapped twin is armed');
+  r = spTap(r.armed, b, true);
+  assert.deepEqual(r, { armed: null, pick: b });
+});