feedback5 CB3: the "受到攻击时" counters answer every damage instance from an enemy, not its attacks only — 菲莱 S2 now blasts on 深溟巢涌者's pulse, so do 星熊 S2, 泡泡, 刺玫 S2, 余 S1, 玛恩纳 无动于衷, 年 S2 and 斩业星熊 (community report of 2026-10-06, item 30)

The report's 退行的潮涌者 is the 巢涌者 (深溟 / 富营养的巢涌者 in this mode): no normal attack, its talent hurts every operator in
range once a second. Official (ArknightsGameData buff_template_data): its pulse is an AdvancedApplyDamage with the enemy as
source (enemy_dsubrl_aoe[aura]); the counters fire on ON_TAKE_DAMAGE — philae_s_2 with no filter, inverse_damage (星熊 S2),
inverse_damage[magic] + nian_s_2 (年 S2), bubble_s_2 / bubble_t_1 (泡泡), vendla_s_2 (刺玫), yu_s_1[inverse_damage] (余 S1),
hsgma2_s_1 / hsgma2_e_003_tr_take (斩业星熊), mlynar_t_2[inverse] (玛恩纳) on a source of the other side; 棘刺 S2 (普通伤害
filter) and 信仰搅拌机 S3 already took any damage. Cause: the kits required dmg.isAttack. Now kits/shared/tier1.js
byEnemyAttack = any enemy damage instance but a 流失, an element 损伤, 无来源 damage or another counter / reflection (tags
'counter' / 'reflect'); 菲莱 S2 any instance but a 流失 or a counter. test/content/op_nian.test.js pinned "a non-attack hit
returns nothing" for 年 S2 — updated on purpose (answered now; a 流失 still is not).

Golden: 19 scenarios where an enemy's non-attack damage (skills, pulses, areas) reached one of these operators — their counter
now answers it (more damage, fx thorns / aoe): roster-002, -005, -008, -010, -012, -016, -033, -044; bond-lateranoShip-low;
fields boss-boss_2-solo, boss-boss_4-pair, boss-boss_4-solo, hidden-boss_8-pair, hidden-boss_8-solo; matches solo-FUNNY-1,
solo-FUNNY-2, coop4-ABYSS-7, coop2-ABYSS-10-boosted; diy-051. Tests: test/sim/feedback5-counters-any-damage.test.js (6; 5
fail on the parent, the first checks the 巢涌者 never attacks). Docs: docs/SIM.md (re-entrancy rule).

server/sim/content/kits/ops/op-nian.js

@@ -37,7 +37,7 @@
 //   −one_minus_status_resistance), refreshed every AURA s while the skill runs; two 年 of a shared field keep the stronger
 //   (installAura's rule). The DEF / block buff ends with the skill, the 抵抗 within AURA_DUR.
 
-import { num, talentBb, traitBb, skillRec, statBuff, toggleBuff, up, giveSp } from '../shared/tier1.js';
+import { num, talentBb, traitBb, skillRec, statBuff, toggleBuff, up, giveSp, byEnemyAttack } from '../shared/tier1.js';
 import { absoluteRangeKeys } from '../../../targeting.js';
 import { COLS } from '../../../constants.js';
 
@@ -154,12 +154,13 @@ export default {
             battle.addBuff(unit, { key: FORT, mods: nz({ hpPct: perHp * n, healingTakenMul: Math.min(healMax, healBase + healAdd * n) }), data: { n }, tags: ['trait'] });
           }, { owner: unit });
         }
-        // S2 铜印: every enemy attack she takes ⇒ atk_scale × ATK arts back to the attacker + silence `silence` s
+        // S2 铜印: every enemy damage instance she takes (the official inverse_damage[magic] + nian_s_2 on ON_TAKE_DAMAGE, not
+        // its attacks only: tier1 byEnemyAttack) ⇒ atk_scale × ATK arts back to its source + silence `silence` s
         const scale = num(b2.atk_scale), sil = num(b2.silence);
         battle.on('damaged', (c) => {
           const src = c.source;
           if (c.target !== unit || !unit.alive || unit.skill?.id !== S2 || !unit.skill.active) return;
-          if (!src || src.side !== 'enemy' || !src.alive || !c.dmg?.isAttack) return;
+          if (!byEnemyAttack(c) || !src.alive) return;
           if (scale > 0) battle.dealDamage(unit, src, { amount: unit.s.atk * scale, type: 'arts', canDodge: false, isSkill: true, ignoreSelect: true, tags: ['skill', 'counter'] });
           if (sil > 0 && src.alive) battle.applyStatus(src, 'silence', { duration: sil, source: unit });
           battle.fx('counter', { x: src.x, y: src.y, id: unit.id });