feedback5 CB4: DESIGN §25.18 — the normative text the stream touched (§5.5, docs/SIM.md, docs/PLAYING.md) named in its intro; two lines reflowed, the two-ducks odds stated

Docs only. Golden unchanged.

docs/history/0.2.0.md

@@ -1074,6 +1074,9 @@ enemies, bosses, waves and movement (items 6, 10, 16.3, 24, 29, 35, 36, 38, 39,
 reproduced on the 0.2.0 tree with a script first, then checked against the official data (enemy_database,
 enemy_handbook_table, activity_table → act2autochess, the level files) and PRTS (备注 included) and the earlier decisions.
 The real ones are fixed, one commit each with its golden scenarios named; the rest are answered with the evidence.
+Normative text touched: §5.5 (design/engine.md: 自制投石机's exception to "a stealthed ally is attacked only by the enemy
+it blocks"); docs/SIM.md (`onOwnBoard`, the 索敌不受阻挡影响 target rule, the silenced 枯朽战士); docs/PLAYING.md (the
+briefing types' share of the waves).
 
 #### 25.18.1 「…新约能天使在开了突袭之后蹦到了下方…临时放置溢出的干员和道具的那一栏高台」, 「单人联防时突袭也可以跑到对面的场地上」 (items 40, 16.3): 突袭 lands only on its player's own board — `sim/battle/players.js onOwnBoard`, `content/bonds/addon/battle.js raidTile`
 
@@ -1093,8 +1096,8 @@ The real ones are fixed, one commit each with its golden scenarios named; the re
 - [ASSUMED]: none beyond §22.2's landing rule (the official landing tile among the legal ones is not known).
 - Golden: 8 scenarios, each a member that used to land on the other half (checked with the parent instrumented):
   boss-boss_2 / 3 / 4 / 5 / 6-pair, hidden-boss_8 / 10-pair (members landing on the partner's half, 1–7 per battle) and
-  the bot match coop2-ABYSS-10-boosted (ai_0's members on the right half of its leader fields). Tests: `test/sim/feedback5-raid-own-board.test.js` (4 cases;
-  each fails on the parent). Docs: docs/SIM.md (`onOwnBoard`).
+  the bot match coop2-ABYSS-10-boosted (ai_0's members on the right half of its leader fields). Tests:
+  `test/sim/feedback5-raid-own-board.test.js` (4 cases; each fails on the parent). Docs: docs/SIM.md (`onOwnBoard`).
 
 #### 25.18.2 「沉默效果没有沉默枯朽战士敌人，枯朽战士敌人被沉默之后死亡依然留下了毒」 (item 10): silenced at its death, 萨卡兹枯朽战士 releases no 污染秽蚀 — `content/enemies/archetypes.js kitPolluted`
 
@@ -1188,8 +1191,8 @@ The real ones are fixed, one commit each with its golden scenarios named; the re
   blocker first (仇恨值: taunt, then the latest deployed). Every other enemy keeps attacking a 隐匿 blocker.
 - [ASSUMED]: none for the rule. Not changed, for later: its stones' splash radius (PRTS 「目标半径1.5范围」, the data's
   `projectile_range` 0.5 × 3; the kit uses 0.5), the 0.3 s between its three stones, and 「不会因丢失目标而结束攻击」.
-- Golden: 1 battle — standin-06 (the bounty catapult, blocked by 忍冬, now shot the 斯卡蒂 / 瑕光 pieces by 仇恨值, its blocker no longer
-  first). Tests: `test/sim/feedback5-catapult-smog.test.js` (3: no attack on a hidden blocker alone, another operator
+- Golden: 1 battle — standin-06 (the bounty catapult, blocked by 忍冬, now shot the 斯卡蒂 / 瑕光 pieces by 仇恨值, its
+  blocker no longer first). Tests: `test/sim/feedback5-catapult-smog.test.js` (3: no attack on a hidden blocker alone, another operator
   instead, every other ranged enemy still attacks its hidden blocker; the first two fail on the parent). Docs:
   docs/SIM.md.
 
@@ -1199,7 +1202,7 @@ The real ones are fixed, one commit each with its golden scenarios named; the re
   wave — minweight 0.6 / maxweight 0.99) swaps 0–2 ground enemies of each player's wave, each into one of 鸭爵, 高普尼克,
   流泪小子, 圆仔 at random (bands/meta.js duckReplace, once per player per battle — no second handler). 1000 real waves
   (`m._normalOpts`, solo and co-op, rounds 5–12): 0 swaps 388, 1 swap 312, 2 swaps 300, never more; the two of a 2-swap
-  wave were the same kind in 81 of 300 (≈ 1 wave in 12 with two ducks or two of another kind). A pair leader field holds
+  wave were the same kind in 81 of 300 (two of one kind in ≈ 1 wave in 12, two ducks in ≈ 1 in 50). A pair leader field holds
   each player's 0–2 on its own half, and 联防 re-enters every leaker's leaked swaps (both as before).
 - **Official**: PRTS 卫戍协议：盟约 下半/PRTS盟约记录 鸭爵 备注 「每回合将有0~2名敌人被替换为上述敌人之一」 — two ducks in one
   wave is the official rule.