feedback1 cell: docs for the 突变细胞 bench rule (DESIGN §21.1 / §20.11 / §21.20, META, PLAYING, DATA, research, CHANGELOG)

- DESIGN §21.1 states the corrected rule with its evidence: bilibili BV1vzyVBuEN9 (上半, about 8:24) and
  BV1Qkw1zMEoR (下半, about 7:25) show the carrier's tile empty at the next prep, one more deployment left
  and the new operator on the bench; the PRTS 备注 is a destroy followed by a gain; PRTS 帮助 sends what a
  player gains to the 手牌区; the closed PR #2 said the same (its merge path not adopted). The WA
  keep-the-tile rule and the carrier-tile merge exception are withdrawn; the bench carrier and the
  hand-and-temp-full case stay [ASSUMED].
- §20.11 / §20.9 no longer count a transformed carrier's tile; §21.20 lists the rule as official;
  §21.25 credits PR #2's bench rule; §6.2 and §6.6 follow; the §21 intro maps it.
- META (bot, ctx.transform, built-ins, merge, notes), PLAYING, DATA (items.json note), research 04
  (addendum 2, implFormula, open question 6) and research 01 row 7 follow.
- One CHANGELOG 0.1.1 line (PR #2 指出).
- docs-consistency pins the docs against the code (no fromKey / returnItems left, the gain through
  acquireChess).

docs/research/01-core-rules.md

@@ -842,7 +842,7 @@ Local copies are in `scratchpad/gd/extra/critic/` (`bw_盟约.txt`, `bw_sweep.tx
 | new | – | At **combat start, all unfrozen shop contents are cleared** ("进入作战期后，栏上若未处于冻结状态则清空全部物资"). | VERIFIED |
 | 4.2 / 8 | bench 10 + temp area | **Hand (手牌区/整备区) = 10 regular + 5 temporary slots**, shared by operators, **items** and hand-deployable **summons**. Several summons of one owner stack into 1 slot; summons of different owners don't stack.<br>When the regular hand is full, every action that would add a card is refused: buy, and withdraw from the board. Exception: a purchase that completes a 3-merge nets −1 card, so allow it.<br>Passive gains (merge result, band/trait/item grants, items returned by promotion) overflow into the temp slots. **While temp is non-empty the player cannot start combat.** Temp is wiped when the next phase starts.<br>A board↔hand swap is allowed even with a full hand. Cards fill hand slots **right→left**. | VERIFIED |
 | 5.2 | – | **Items cannot be sold** ("多余的装备无法进行出售，可以销毁"). They can only be destroyed for 0 funds. Operators sell for 1 from board or hand. | VERIFIED |
-| 7 | promotion reward [COMM] | Confirmed (PRTS 帮助, BWIKI, official intro). On acquiring the 3rd copy:<br>1. The 3rd copy is not created, and the 2 owned copies are destroyed wherever they are.<br>2. **1 elite goes to the hand — or, when a consumed copy was deployed, to that copy's board position** (PRTS 帮助 "发送1名【精锐】状态的该干员至手牌区（若消耗已部署至作战区的干员，则发送至作战区对应位置）"; the user confirmed it first-hand after playtest #6 — this row used to read "not to a board tile", a misreading of the same sentence). Their equipment returns to the hand ("干员晋级后已配发装备会回收至整备区，需要重新配置"). [ASSUMED] where the text is silent: with two or three deployed copies the elite takes the tile of the one that deploys first (top→bottom, then left→right — the official deploy order) with its facing; a deployed operator transformed into the completing copy (突变细胞) counts as deployed; the copies' summons leave and the elite's own summon card joins the hand (§战斗部署 "如果部署的干员拥有可手动部署的附属召唤物，则该召唤物会立刻加入手牌区"); the deploy count never grows.<br>3. The shop then temporarily shows **3 operators of tier min(shopLevel+1, 6) at price 0**. The official intro shows "II 0 ×3" after a tier-I merge at L1 and "III 0 ×3" at L2.<br>4. The player takes **1**. The offer cannot be refreshed or frozen and expires at round end. | VERIFIED (elite to the copy's board position: PRTS + the user); the tile among several deployed copies ASSUMED |
+| 7 | promotion reward [COMM] | Confirmed (PRTS 帮助, BWIKI, official intro). On acquiring the 3rd copy:<br>1. The 3rd copy is not created, and the 2 owned copies are destroyed wherever they are.<br>2. **1 elite goes to the hand — or, when a consumed copy was deployed, to that copy's board position** (PRTS 帮助 "发送1名【精锐】状态的该干员至手牌区（若消耗已部署至作战区的干员，则发送至作战区对应位置）"; the user confirmed it first-hand after playtest #6 — this row used to read "not to a board tile", a misreading of the same sentence). Their equipment returns to the hand ("干员晋级后已配发装备会回收至整备区，需要重新配置"). [ASSUMED] where the text is silent: with two or three deployed copies the elite takes the tile of the one that deploys first (top→bottom, then left→right — the official deploy order) with its facing; the copies' summons leave and the elite's own summon card joins the hand (§战斗部署 "如果部署的干员拥有可手动部署的附属召唤物，则该召唤物会立刻加入手牌区"); the deploy count never grows. A 突变细胞 carrier is destroyed before its new operator is gained (official footage, DESIGN §21.1), so a merge that operator completes never uses the carrier's tile.<br>3. The shop then temporarily shows **3 operators of tier min(shopLevel+1, 6) at price 0**. The official intro shows "II 0 ×3" after a tier-I merge at L1 and "III 0 ×3" at L2.<br>4. The player takes **1**. The offer cannot be refreshed or frozen and expires at round end. | VERIFIED (elite to the copy's board position: PRTS + the user); the tile among several deployed copies ASSUMED |
 | 2 | BAND_CHECK "3 random + reroll" [ASSUMED] | **All unlocked bands are shown.** In co-op, players pick **one at a time in a random order** shown on the left ("以随机顺序进行策略轮选"). Each co-op player may **skip once**. The step lasts 50 s; on timeout the band is 华法琳. **Duplicates are allowed:** the official illustration shows 2 teammates' picks still un-greyed in the grid. [ASSUMED] 12 s per turn inside the 50 s step. | VERIFIED except the per-turn timer |
 | 2 | banned bonds "1 core + 1 add-on" [ASSUMED] | Replaced by the verified rule in **A2**. | VERIFIED |
 | 1, 12 | one ×0.7/×0.8 multiplier per mode; `aceffect_enemy_*` mapping [ASSUMED] | Replaced by the **per-round table in A3**. | VERIFIED (PRTS, user-sourced) |

docs/research/04-items.json

@@ -5493,7 +5493,7 @@
    "talentNotes": [
     "本装备不会合并为进阶品质"
    ],
-   "implFormula": "After the battle ends: replace the carrier with a random operator one tier higher (max tier 6); item consumed [ASSUMED]. Keeps elite status? [ASSUMED: result is NORMAL quality; other equipped item returns to hand]. Never merges.",
+   "implFormula": "After the battle ends: the carrier is destroyed wherever it stands (a board tile is freed); its equipment, the cell included, returns to the hand first (the cell is not consumed); then a random NORMAL operator one tier higher (max tier 6; an elite carrier too) is gained like any gained operator, into the 整备区 (overflow temp), never onto the carrier's tile. Never merges. [Corrected after 0.1.0 — the first reading was 'item consumed [ASSUMED]': PRTS 下半 记录 备注 '生效时，原干员销毁，获得一名高一阶的随机初始干员（最高六阶）'; official footage bilibili BV1vzyVBuEN9 / BV1Qkw1zMEoR (the tile empty, the operator on the bench; PR #2); see the 04-items.md addenda.]",
    "normal": {
     "chessId": "chess_item_5_08_e_a",
     "isGolden": false,

docs/research/04-items.md

@@ -252,6 +252,7 @@ Param names below are the keys of `items[].normal.params` / `items[].golden.para
   params: `count=8.0/7.0`; buff keys: `sell_char_count_gain_equip_owner_bond`
 - **突变细胞** (`chess_item_5_08_e_a`, TV, 2) - After the battle ends: replace the carrier with a random operator one tier higher (max tier 6); item consumed [ASSUMED]. Keeps elite status? [ASSUMED: result is NORMAL quality; other equipped item returns to hand]. Never merges.  
   **Addendum (player feedback after 0.1.0):** the cell is **not consumed**. PRTS 卫戍协议：盟约 下半/PRTS盟约记录 备注: "生效时，原干员销毁，获得一名高一阶的随机初始干员（最高六阶）" (normal result confirmed); PRTS 卫戍协议/帮助: "佩戴的装备无法手动卸除，在失去该干员（干员出售、销毁、合并等）或装备合并为进阶品质时自动卸除" (a destroyed operator's equipment comes off); the official text never says 销毁 for the cell (every consumable's does); players re-inject it every round (bilibili cv47000418 "之后就是一直打针，扎到核心卡或者叠层手干员就换人扎"; cg.163.com guide 2025-11-15 "这个道具可以无限使用"; bilibili cv48003106 "扎了好几次") — the destroyed operator's equipment, the cell included, returns to the hand.  
+  **Addendum 2 (where the new operator goes):** it is **gained into the 整备区**, not left on the carrier's tile. Official gameplay footage — bilibili BV1vzyVBuEN9 (上半, ≈ 8:24) and BV1Qkw1zMEoR (下半, ≈ 7:25) — shows the next prep with the carrier's tile empty, the remaining-deploy counter (剩余可放置角色) one higher and the bench holding the returned equipment and the new tier+1 operator, which the player then deploys by hand. This is the 备注 read as written (a destroy, then a gain) and PRTS 卫戍协议/帮助's rule that everything recruited or gained is sent to the 手牌区 ("被发送至手牌区的物资优先从右到左填充空位"); an outside contributor's playtest (the closed PR #2) said the same. A merge the new operator completes is an ordinary gained copy's merge: the carrier is gone first, so its tile is no copy's (DESIGN §21.1).  
   params: `-`; buff keys: `char_chess_transformation_equip`
 - **人事部文档** (`chess_item_6_08_e_a`, TVI, 4) - On equip: destroy item; player's max deployable operator count becomes `count` (9) (base maxBattleChessCnt = 8). Never merges; a second copy has no further effect [ASSUMED].  
   params: `count=9.0`; buff keys: `equip_destory_deployment_cnt_change`
@@ -442,7 +443,7 @@ Pools referenced but NOT defined in client data (server-side) - proposed content
 3. Whether equipped copies count toward the 2-copy merge (assumed yes).
 4. Exact contents of server pools (`pool_equip_*`) and of `hunter_band_1` bounty choices.
 5. 道具补给 / 机密商店 offer size and tier (3-pick-1 assumed); round schedule taken from a community post.
-6. M3茧甲 revive HP (full assumed); 突变细胞 result quality and equipment — resolved after 0.1.0: a normal operator (PRTS 备注 "随机初始干员"), the equipment and the cell return to the hand (addendum above).
+6. M3茧甲 revive HP (full assumed); 突变细胞 result quality, equipment and placement — resolved after 0.1.0: a normal operator (PRTS 备注 "随机初始干员"), the equipment and the cell return to the hand, and the new operator is gained into the 整备区 with the carrier's tile left empty (addenda above; official footage).
 7. 天马之枪 "30% true damage": `atk_scale=0.3` suggests 30% of ATK per damage instance; alternative reading 30% of damage dealt. We use 30% ATK.
 8. 蒸汽之心 doubling for 战栗锤: prob or duration? (we double prob 10%->20%).