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/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).