feedback5 R19E: the 鸭爵 strategy's swapped-in 流泪小子 hides again 1 s after a block ends instead of the official 0 s — a deliberate deviation, the owner's decision of 2026-10-07 (「要不等待个1秒这样再重新隐匿」); a separate commit the integrator can drop; golden: 1 scenario moves (matches solo-HARD-2)

content/enemies/archetypes.js stealth: an enemy spawned with the band's swap tag 'duck' (content/bands/meta.js
duckReplace) gets its 隐匿 back no sooner than DUCK_STEALTH_RESTORE (1 s, content/enemies/helpers.js) after a block ends
— in practice 流泪小子 (enemy_2034_sythef_2), the only one of the four swaps with 隐匿, officially 0 s (PRTS 流泪小子
「隐匿（解除阻挡0秒后恢复）」). The same enemy anywhere else keeps 0 s: the bounty card's 流泪小子 (enemy_2034_sythef), an
untagged spawn; a 3 s 隐匿 stays 3 s; a copy leaked into 联防 keeps its tag and the 1 s. After each strike (its stunned
blocker lets go) it is now revealed through its 0.8 s post-strike stand and 0.2 s of walking.

Measured, 8 seeds each — leaked / HP left / revealed s per battle; W = 3 elite melee in a lane + an elite sniper vs the
R6 wave's ground enemies with one swapped 流泪小子, B = 8 elites on 战场#01 vs the whole R6 wave with one swap: before
the clip fix W 5/8, 42 %, 2.3 / B 8/8, 47 %, 3.2; after it W 5/8, 31 %, 2.6 / B 8/8, 58 %, 2.5; with the 1 s W 4/8,
31 %, 4.0 / B 8/8, 56 %, 5.5. Options for the owner (measured on the fixed engine, not built): 2 s W 4/8, 31 %, 5.4 /
B 8/8, 46 %, 8.5; 3 s (the general 隐匿 rule) W 4/8, 31 %, 6.4 / B 8/8, 39 %, 11.5; a 1.5 s stun on the copy (below its
2 s interval, so its blocker takes it over again) W 4/8, 2 %, 4.0 / B 4/8, 6 %, 5.5; a 1 s stun: knocked out in all 16;
the 1 s delay + a 2 s stun W 4/8, 21 %, 5.1 / B 5/8, 26 %, 8.1. Worse: half speed while 隐匿; a stunned operator that
keeps blocking it (pins that operator for good).

Golden: matches solo-HARD-2 — its bot holds 鸭爵; the swapped 流泪小子 of round 13 is free and revealed for 49 ticks in
its 1 s windows (the round-12 one is never released by a block), so the match parts at round 13 (a victory instead of
a defeat); the other 282 scenarios unchanged.

Tests: test/content/feedback5-duck-restealth.test.js (3; the swap's 1 s and the band path fail on the parent, the 0 s
guard passes on both); enemies_bosses, feedback2-surtr-stealth, feedback1-ducklord, feedback5-attack-clip-rest pass.
Docs: CHANGELOG 0.2.0 有意与官方不同的调整 (and the 核实后不是问题 line points to it), docs/history/0.2.0.md §25.22.6,
docs/PLAYING.md, docs/SIM.md, design/engine.md.

docs/PLAYING.md

@@ -82,7 +82,7 @@
 - **元素损伤条**在单位自己的血条正下方：左边是元素图标，白条是剩余的元素值，只有真正爆发时才会耗尽；爆发后条变成元素的颜色、图标闪烁，在冷却期间慢慢回满（这段时间不会再积累元素损伤）。
 - **敌人**：远程敌人的射程按官方从干员的碰撞体积（半径 0.25 格）算起，比数据上的攻击范围半径远 0.25 格——例如萨卡兹枯朽战车（射程 2.2）能打到中心 2.45 格以内、站在低地的干员。没被阻挡的远程敌人每次攻击都会站定、播完攻击动作，两次攻击之间才继续前进。它的第一下攻击就是「秽蚀轰击」（在目标处留下半径 1.7、持续 10 秒的污染区：低地每秒 50、高台 25 点真实伤害，同名不叠加），被阻挡时普通攻击伤害翻倍。“萨科塔之翼”等血量第一次低于一半时会在原地小范围乱飞 5 秒（官方叫「恐惧」）；叙拉古、妮芙等干员造成的恐惧会让敌人朝远离干员的方向逃跑。隐匿的敌人只有被阻挡（或被揭示）时才能被选为攻击目标，溅射、技能的圆形范围伤害也打不到没被挡住的隐匿敌人（和官方一样）；阻挡解除后 3 秒内它仍然可以被选中（官方页面注明 0 秒或 1 秒的敌人按页面），之后才重新隐匿：深池逐火战士每次被击倒后先重生 1 秒，然后变成继续往前走的隐匿「余烬」（需要 5 次伤害击倒，护卫的「火灰」10 次），一般要用干员挡住它才能选中（挡住时它不再半透明；被阻挡时被击倒的，重生结束后约 2 秒内也能用远程或范围伤害补刀），10 秒内没打掉就满血站起来；敌人重生时身上的减速、恐惧等状态会被清空、技能冷却从头开始，被恐惧的逐火战士变成余烬后也能被挡住；转译基底·α 原始形态受到的伤害全部无效，受到第 4 次物理伤害、第 4 次法术伤害或被阻挡时花 2 秒变成寻仇者、特战术师或幽灵，之后才能被击倒。
 - **复活**（策略「埃芒加德」的前 3 次、M3茧甲）与官方一致：算作一次被击倒，紧接着在倒下的位置免费立即再部署——干员「被击倒时」和「部署时」的效果都会触发（例如砾的不屈 / 卡西米尔层数、瑕光的层数、卡西米尔盟约的部署攻击力），技力和身上的增益像普通再部署一样重置。
-- **策略「鸭爵」（“神秘顾客”）**：从第 5 回合起，你和队友的每场作战（**最终攻势和隐秘核心也算**，联防不另外替换）有 0–2 名地面敌人（不含领袖及其部件、悬赏敌人）被替换为特殊版本的鸭爵、高普尼克、流泪小子或圆仔，出现在被替换敌人的时间和路线上（两人同场的领袖战里，各自只替换走向自己保护目标点的敌人）；击倒者获得 1 资金（联防中的队友也算），漏进保护目标点照常扣 1 点目标生命值。鸭爵和圆仔**不攻击、无法被阻挡**：鸭爵受到伤害后移动速度 +300%；圆仔始终面向我方干员较多的一侧，来自正面的物理 / 法术伤害 −80%。流泪小子隐匿（被阻挡时才能被选中），攻击使目标晕眩 3.5 秒；高普尼克免疫晕眩、冻结和浮空。
+- **策略「鸭爵」（“神秘顾客”）**：从第 5 回合起，你和队友的每场作战（**最终攻势和隐秘核心也算**，联防不另外替换）有 0–2 名地面敌人（不含领袖及其部件、悬赏敌人）被替换为特殊版本的鸭爵、高普尼克、流泪小子或圆仔，出现在被替换敌人的时间和路线上（两人同场的领袖战里，各自只替换走向自己保护目标点的敌人）；击倒者获得 1 资金（联防中的队友也算），漏进保护目标点照常扣 1 点目标生命值。鸭爵和圆仔**不攻击、无法被阻挡**：鸭爵受到伤害后移动速度 +300%；圆仔始终面向我方干员较多的一侧，来自正面的物理 / 法术伤害 −80%。流泪小子隐匿（被阻挡时才能被选中），攻击使目标晕眩 3.5 秒，被晕眩的干员挡不住它（官方规则）；它被放开后要过 1 秒才重新隐匿（官方是 0 秒，本模式有意放宽，维护者 2026-10-07 的决定）；高普尼克免疫晕眩、冻结和浮空。
 - 右上角 🔍▶▶ 可以查看本回合即将来袭的敌人（预览区），左上角 🔍 查看本局信息（禁用盟约、禁用干员、策略）。
 
 ## 5. 联防（同盟）

docs/SIM.md

@@ -624,7 +624,7 @@ of coverage per 3 s), kept because the current wording no longer says so (feedba
 | `tremble` (战栗) | 被阻挡后无法进行普通攻击: no normal attack **while blocked** (abilities still fire) | – |
 | `palsy` (麻痹) | each stack cancels one enemy normal attack (max 3, lasts until consumed); refused by 麻痹免疫 (data `palsyImmune`); each cancel fires the hook `palsyTrigger` (§5) | stacks, default 1 |
 | `disarm` | no normal attacks | – |
-| `stealth` / `reveal` | 隐匿: untargetable unless blocked (an ally: only the enemy it blocks attacks it, and an enemy's area effects and buff auras skip it even when it blocks that enemy — `targeting.js areaSelectable` / `auraSelectable`, GitHub #97, owner 2026-10-04; 0.1.2 made an exception for that blocker) / cancels stealth. An enemy's 隐匿 also stays off after a block: each block's end (`Battle._stealthSwitch`, every release path) switches each of its 隐匿 sources off for `STEALTH_RESTORE` (3) s — PRTS 作战机制 §隐匿 "不被阻挡的3秒后重新进入隐匿" — or the source's own "（解除阻挡N秒后恢复）" (buff `data.stealthRestore`: 0 s for 业余竞演者, 节日爵士乐手, 假想敌：骨刺, 流泪小子, 访问团强攻冠军 and 清明's veil, 1 s for the 家族灭迹人); a new block inside it lifts it again and its end restarts the window; our operators' 隐匿 / 迷彩 never lift by blocking (DESIGN §22.8). `targeting.js enemyStealthed` is the one test: the b.snap stealth bit is set only while its 隐匿 is on (drawn solid otherwise); an operator's radius area damage (`foesInRadius`) skips it too (PRTS 作战机制 §AOE伤害判定 "对攻击范围内的每个可以被选中的敌人进行判定"; until 0.1.1 the splash still hit it) | – |
+| `stealth` / `reveal` | 隐匿: untargetable unless blocked (an ally: only the enemy it blocks attacks it, and an enemy's area effects and buff auras skip it even when it blocks that enemy — `targeting.js areaSelectable` / `auraSelectable`, GitHub #97, owner 2026-10-04; 0.1.2 made an exception for that blocker) / cancels stealth. An enemy's 隐匿 also stays off after a block: each block's end (`Battle._stealthSwitch`, every release path) switches each of its 隐匿 sources off for `STEALTH_RESTORE` (3) s — PRTS 作战机制 §隐匿 "不被阻挡的3秒后重新进入隐匿" — or the source's own "（解除阻挡N秒后恢复）" (buff `data.stealthRestore`: 0 s for 业余竞演者, 节日爵士乐手, 假想敌：骨刺, 流泪小子, 访问团强攻冠军 and 清明's veil, 1 s for the 家族灭迹人 — and no less than 1 s for a 鸭爵 swap, spawn tag `'duck'`: `content/enemies/helpers.js DUCK_STEALTH_RESTORE`, the owner's decision of 2026-10-07, a deliberate deviation for its 流泪小子); a new block inside it lifts it again and its end restarts the window; our operators' 隐匿 / 迷彩 never lift by blocking (DESIGN §22.8). `targeting.js enemyStealthed` is the one test: the b.snap stealth bit is set only while its 隐匿 is on (drawn solid otherwise); an operator's radius area damage (`foesInRadius`) skips it too (PRTS 作战机制 §AOE伤害判定 "对攻击范围内的每个可以被选中的敌人进行判定"; until 0.1.1 the splash still hit it) | – |
 | `camou` (迷彩) | an ally's camouflage (ba.camou "不阻挡时不成为敌方普通攻击的目标（无法躲避溅射类攻击）"): like `stealth` for enemy targeting (only the enemy it blocks attacks it) — but an enemy's splash and other area effects still hit it (`areaSelectable` does not check it) — and on screen (b.snap stealth bit, `snapshot.js flagsOf`), but not 隐匿 for 隐匿-conditions (叙拉古, 家族徽章) and under its own buff keys. 忍冬 S3 (key `vulpis:camou`, until her next cast), 寒芒克洛丝 S1 | – |
 | `invulnerable` | ignores damage | – |
 | `levitate` (浮空) | stun + unblockable (unblocks enemies) + 失衡免疫 (`noDisplace`); an air unit meanwhile (`isFlying`: melee cannot hit it); **half duration on units with (current) massLevel > 3**; refused on data flyers (`motion` FLY) that hold no 缚地 and on units already levitated (PRTS 异常效果 "若单位数据上为飞行单位且不持有缚地异常或是持有浮空异常则Buff取消") — a 近地悬浮 enemy is WALK in its data, so it can be levitated; 浮空 is not one of the 近地悬浮 enemies' drop triggers | – |

docs/design/engine.md

@@ -175,7 +175,7 @@ Each domain file `server/sim/content/{tokens,bonds,garrisons,items,bands,enemies
 - bonds: 23 (battle + meta), exact per-layer formulas from research 02.
 - garrisons: 43 effect keys (IN_BATTLE via hooks; SERVER_* via meta registry).
 - items: 56 equipment (+golden) + 3 Arts; 变形同构体 bond grant; VI-tier set/combos.
-- bands: 40 strategies (meta + battle). 鸭爵 “神秘顾客” swaps 0–2 ground enemies (not the leader, its parts or bounties; on a pair boss field only the player's half — the boss / hidden `onBattleStart` event carries `routes` and `side`) in every teammate's normal / Final Assault / Hidden Core battle from R5 into the act2 鸭爵 / 高普尼克 / 流泪小子 / 圆仔 (lpr 1, 1 fund to the killer, 联防 included) (§21.5).
+- bands: 40 strategies (meta + battle). 鸭爵 “神秘顾客” swaps 0–2 ground enemies (not the leader, its parts or bounties; on a pair boss field only the player's half — the boss / hidden `onBattleStart` event carries `routes` and `side`) in every teammate's normal / Final Assault / Hidden Core battle from R5 into the act2 鸭爵 / 高普尼克 / 流泪小子 / 圆仔 (lpr 1, 1 fund to the killer, 联防 included) (§21.5); the swaps carry the spawn tag `'duck'`, and the swapped 流泪小子 hides again 1 s after a block ends, not the official 0 s (the owner's decision of 2026-10-07, §25.22.6).
 - enemies: special-type behaviours (FLY, TIMES, ELEMENT, DOT, INVISIBLE, REFLECTION, SPECIAL) and notable individual abilities from `data/enemies.json`; bosses 1–10 scripted — the huge leaders (假想敌：胄 ×2, 假想敌：管 ×2, 盐风主教昆图斯, 阿利斯泰尔, “萨米的意志”) are 自缚 + 无法被阻挡 (PRTS 天赋; `content/bosses.js SELF_BOUND`: a persistent noMove + unblockable buff from spawn) with their hit area (§19.4); 圆仔 and 鸭爵 are 无法被阻挡 (PRTS 天赋, §21.5); the knock-out forms follow PRTS — 深池逐火 余烬 (5 / 10 hits, 隐匿, blockable, back after 10 s), 转译基底·α (damage cancelled until its 2 s change into 寻仇者 / 特战术师 / 幽灵), the leaders' 重生, 守墓石像's statue and flight — and every 重生 clears what operators put on the enemy and restarts its skills from their initial cooldown (§21.4, §21.19); the mode's air units are 静态刚体, never moved (§21.9); leader parts (斩胄之剑 / 破胄之锤 / 碎铳之簧) pass every damage they take to their leader 1:1 as 无来源 HP loss (`PART_TRANSFER` 1, PRTS "等量"), a 假想敌：胄 drone that dies costs it 2 % of the pool (`DRONE_LINK_BASE 'pool'`) (§20.10, §20.13); devices/terrain.
 - choices: 机变 families (悬赏决策 bounties, 道具补给, 机密商店, 战术决策 team/personal buffs). 悬赏决策 = the official structure of its round (choices.json `bountyDrafts`, 86 drafted cards: R3 a fixed set of six 两场 cards, R9 6 of a boss group's list, R11 6 of a seen 7-card list; §21.2); 机密商店 (R11 the official composition) and 战术决策 can offer the same card twice (`shopDraft` / `tacticDraft`); bounty cards carry `descRaw`; no draft offers a multi-round card, and 教鞭's lasts two battles (`choices.js MULTI_ROUND_BOUNTY_BATTLES`, §20.6). 教鞭 = a random 战术特训 card (3 drawn, 1 taken).
 

docs/history/0.2.0.md

@@ -2027,3 +2027,23 @@ here, each reproduced first; the rest were answered (not a bug, already fixed in
   the same round. The displacement rule alone moves one roster scenario.
 - Tests: `test/sim/feedback5-attack-clip-rest.test.js` (5; the four behaviour tests fail on 0255afd, the data pin passes
   on both). Docs: docs/SIM.md (enemy attacks), DESIGN §5 (design/engine.md), docs/DATA.md (`attackAnim`).
+- **Deliberate deviation — the owner's decision of 2026-10-07** (「鸭爵策略产生的泪眼汪汪我想了一下，要不等待个1秒这样再重新隐匿，
+  或者提供点别的降低难度的方案」): the 鸭爵 swap's copies (spawn tag `'duck'`, `content/bands/meta.js duckReplace` — in
+  practice 流泪小子, the only one of the four with 隐匿) get their 隐匿 back no sooner than 1 s after a block ends
+  (`content/enemies/helpers.js DUCK_STEALTH_RESTORE`, `archetypes.js stealth`; officially 0 s). The same enemy anywhere
+  else — the bounty card's 流泪小子 (`enemy_2034_sythef`), any other spawn — keeps 0 s; a copy leaked into 联防 keeps its
+  tag and the 1 s. After each strike it is now revealed through its 0.8 s stand and 0.2 s of walking.
+- Measured, 8 seeds each (W: 3 elite melee operators in a lane + an elite sniper against the R6 wave's ground enemies with
+  one swapped 流泪小子; B: 8 elite operators on 战场#01 against the whole R6 wave with one swap) — leaked, HP left, revealed
+  s per battle: before 0.2.0's fixes W 5/8, 42 %, 2.3 / B 8/8, 47 %, 3.2; after the clip fix W 5/8, 31 %, 2.6 / B 8/8,
+  58 %, 2.5; with the 1 s W 4/8, 31 %, 4.0 / B 8/8, 56 %, 5.5. Other options, measured on the fixed engine and not built:
+  2 s — W 4/8, 31 %, 5.4 / B 8/8, 46 %, 8.5; 3 s (the general 隐匿 rule of PRTS 作战机制) — W 4/8, 31 %, 6.4 / B 8/8,
+  39 %, 11.5; a 1.5 s stun on the copy (below its 2 s interval: its blocker recovers while it still stands in its block
+  radius and takes it over again) — W 4/8, 2 %, 4.0 / B 4/8, 6 %, 5.5; a 1 s stun — knocked out in all 16; the 1 s delay
+  with a 2 s stun — W 4/8, 21 %, 5.1 / B 5/8, 26 %, 8.1. Worse, not offered: half speed while 隐匿 (B 8/8, 76 % — it
+  stays hidden longer), a stunned operator that keeps blocking it (pins that operator for the whole battle).
+- Golden (this rule alone): matches solo-HARD-2 — its bot holds 鸭爵; the swapped 流泪小子 of round 13 is free and revealed
+  for 49 ticks in its 1 s windows (the round-12 one is never released by a block), so the match parts at round 13 and
+  ends in a victory instead of a defeat; the other 282 scenarios are unchanged. Tests:
+  `test/content/feedback5-duck-restealth.test.js` (3; the swap's 1 s and the band path fail before it, the 0 s guard
+  for the same enemy elsewhere passes on both).