ark-stronghold-protocol/server/sim/content/enemies.js

// server/sim/content/enemies.js — enemy special types (特训敌人) and individual enemy abilities (DESIGN §7).
//
// Battle side: install(battle) registers ONE set of global dispatch hooks per battle (ensureInstalled — idempotent,
// bosses.js calls it too) and attaches an ability list to every spawned enemy whose key has a kit in KITS.
// Every number comes from the enemy's talent / skill blackboard (data/enemies.json, merged with the wave template's
// `overrides[key].talents/skills` — the engine only applies `overrides.stats`). Numbers that exist nowhere in the
// data are named constants below, marked [ASSUMED] or sourced from the official term table (gamedata_const
// termDescriptionDict) / PRTS.
//
// Runtime model: `enemy.mem.ab = { key, t (talent bb), tS (talent bbStr), sk {prefabKey → {cd, icd, sp, bb, bs}},
//   list [abilities], times, hitShield, atkType, immune, … }`. An ability is a plain object with optional methods
//   spawn(b,e,a,ab) · dealt(c,…) ('damaged' by one of e's ATTACKS on an ally, non-element) · taken(c,…) ('damaged' on e,
//   non-element) · hitIn(c,…) ('hit' on e, late: after every other hit handler) · hitOut(c,…) ('hit' from e, early) ·
//   (`c.source` is null for 无来源 damage — element bursts; target-side reactions that must still fire, e.g. damage
//   sharing, read `c.source || c.credit`, `credit` naming the unit that filled the gauge) ·
//   before(c,…) (beforeAttack of e) · attack(c,…) · blocked(c,…) · killed(c,…) (return true = revived; the kill is then
//   hidden from later 'kill' handlers) · death(c,…) · status(c,…) (statusApplied on e) · burst(c,…) (elementBurst on e)
//   · tick(b,e,a,dt) every `iv` s (every tick when iv is 0) · skill: `cd`/`left`(=icd)/`cond`/`fire` (cooldown runs
//   continuously; fires when ready, the enemy can act and `cond` holds). `sil: true` = the ability's handbook line
//   is flagged SILENCE (沉默 disables it: exactly the data's `format: "SILENCE"` lines); stun / freeze / sleep block
//   skills. Enemy SP skills ("数次攻击后…"): SP +1 per attack, the (spCost+1)-th attack is the skill attack (official
//   粉碎攻坚手 text: spCost 2 = "攻击2次后，下一次攻击").
// Shared mechanics: reborn() — "首次被击倒后重生 / 第二形态" (the first KO is hidden from kill credit and bounty; a
//   rebirth of Reborn.duration s, untargetable and inert, then the new form); artsBarrier() — "吸收法术伤害的屏障"
//   (absorbs arts after RES); frontGuard() — "来自正面的伤害降低" (facing = walking direction or the bigger crowd);
//   unbalanced() — 失衡 detection (displacement beyond the enemy's own speed; engine displace() has no hook);
//   husk() — "被击倒时暂时变为…，一段时间后重生" (Revive[Trigger]: every knock-out of the first form ⇒ 1 s 重生 ⇒ a walking
//   hit-count husk — 隐匿 逐火 embers, the unblockable 再生 puppet — until the real death or its revival); every 重生
//   (reborn / husk / statue) clears the enemy's statuses and the buffs allies gave it (rebirthCleanse, PRTS 特殊机制
//   §重生 "清空自身身上除白名单外所有Buff"); a data-unarmed
//   enemy armed by a form (转译基底) sets `e.profile` noAttack / melee / dmgType / maxTargets and attacks through the
//   engine (ai.js enemyAttack); float() — 近地悬浮 (an air unit that
//   keeps its ground path, Unit.isFlying; kitSyufo / kitParrot lose it when stunned). `e.profile.canTarget(ally)` = the
//   enemy's own target rule (只攻击地面单位 …), applied by the engine to the candidates before its priority order; a
//   special priority (优先攻击防御力最高的… / 生命上限最高的…) sorts by its key, ties by taunt then latest deployed
//   (targeting.js aggroCmp — PRTS 索敌: 特殊优先级 → 仇恨值).
//
// Special types (factions.json):
//   FLY        — engine (FLY motion, ranged-only targeting). Flyer kits below (御4, 护障, 寒霜, 萨科塔之翼/眼, 黑云 …).
//   TIMES 频次 — "需要N次伤害击倒": maxHp := N hits; engine buff flag hitCount — every damage instance (any type, element
//                bursts included) removes exactly 1 on its own DamageInfo (茶器 hitCountArts: phys removes 0); HP loss
//                (loseHp) bypasses the rule. The faction's enemies
//                create those units (death spawns, embers, blades, 再生).
//   ELEMENT    — element damage on hit = ATK × ep_damage_ratio into the ally's gauge. 侵蚀 (erosion) is an engine
//                gauge whose burst is the official one (termDescription ba.dt.erosion: "永久降低100点防御力并受到800点物理伤害").
//   DOT        — damage zones (污染秽蚀: true damage, one tick per second however many cover a unit; 毒雾, 燃烧区域),
//                bleeding (removed by healing), pulsing auras.
//   INVISIBLE  — permanent `stealth` flag (engine: untargetable unless blocked or revealed). An operator's radius area
//                damage skips an unblocked one too (Battle.foesInRadius: profession splash around a struck target,
//                skill circles — 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 it
//                still hit it); tile selectors (enemiesInKeys) always skipped it.
//   REFLECTION — 折射 (ba.refraction "生效时，法术抗性+70"): RES +refracting.magic_resistance while NOT silenced
//                (the ability line is SILENCE-flagged: silencing turns it off); 镜膜 also gets max HP +100 % while on.
//   SPECIAL    — mostly stats; prisoners, 穿刺手, 暴虐兵长, 镜卫, 动力装甲 … below.
// Every enemy key of data/enemies.json is either in KITS (this file), BOSS_KEYS (bosses.js) or STATS_ONLY (with the
// reason) — pinned by test/content/enemies_bosses.test.js. Bounty (悬赏) leaders are included: multi-form ones
// (巨大的丑东西, 杰斯顿, 自在, 锏, 扎罗) get their second form; event-only mechanics (芦苇, 摄影区, 狂欢时刻, 悬索桥, 唤血祭坛,
// 封冻/供暖器, 赘生甲壳, 锁链, 血债账款, 晦明) have no counterpart in this mode and are listed where they apply.
//
// fx kinds emitted (battle.fx(kind, {x, y, …})): 'explode' {r, kind} · 'zone' {r, dur, kind} · 'telegraph' {r, dur,
//   kind, tiles?, id?, form?} (delayed strikes, charges, 'reborn' with form 'reborn') · 'beam' {from, to, kind} ·
//   'summon' {id, key} · 'ember' {id, hits, dur, form: 'husk'} · 'revive' {id, kind?, form: 'form2' | 'revived' | 'fly'}
//   · 'stone' {id, dur, form: 'stone'} · 'blink' {id, fx, fy} · 'charge' {id, tx, ty} · 'expose' {id} · 'shieldBreak'
//   {id} · 'liberate' {id} · 'phase' {id, kind, dur?, form?} (form changes — 掠海漂移体 'crawl', 暴鸰 'bombed',
//   translator_* — and barrier / charge states) · 'lpLoss' {value, reason} · 'steal' · 'ignite'. Forms go through
//   setForm(): the unit keeps it (`e.form`, UnitInfo `form`) and the fx's `form` is the model's clip set from then on
//   (render/app.js → UnitView.setForm, units.js FORMS); the client keeps every fx with a `form` through catch-ups and
//   hidden tabs (shared/protocol.js fxForm).
// Custom hook: 'lpLoss' {amount, reason, source} — leader "扣除目标生命" effects; also summed into result.lpLoss.

import { TICK, MOVE_SCALE, ELEMENT, ATTACK_PAUSE, PROJECTILE_SPEEDS, ALLY_COLLIDER_RADIUS } from '../constants.js';
import { canTargetAlly, sortAllyTargets, aggroCmp } from '../targeting.js';
import { mitigate, periodicDamage } from '../damage.js';

// ---------------------------------------------------------------------------------------------------------------
// constants (numbers that exist nowhere in the data)

/** 侵蚀 → engine gauge. */
export const EROSION = 'erosion';
/** Official erosion burst on operators (gamedata_const termDescriptionDict ba.dt.erosion; engine constants ELEMENT.erosion.ally). */
export const EROSION_BURST = Object.freeze({ defDown: ELEMENT.erosion.ally.defDown, physDamage: ELEMENT.erosion.ally.damage });
/** 假想敌：淤困: element damage its host's burst spreads to the allies of the 4 tiles around (PRTS 假想敌：淤困 "附着对象元素爆发时
 *  …对附着对象及周围4格内的所有我方单位…造成1000同类型元素损伤"; the host itself is in its 爆发冷却). */
const PARASITE_SPREAD = 1000;
/** 重生 of a Revive[Trigger] knock-out before its husk (PRTS 深池逐火战士 and 假想敌：再生 天赋: "被击倒后重生，持续1s，随后变为
 *  怨恨的余烬 / 再生状态，1s内不移动且持有无敌+无法阻挡+失衡免疫"; both models' knock-out clips last 1 s). */
export const HUSK_REBIRTH = 1;
/** 转译基底·α: "变化过程持续2s" (PRTS 天赋; the model's A_Die_B / _C / _D change clips last 2 s); the original form's
 *  immunities ("免疫晕眩/沉睡/寒冷/冻结/浮空/恐惧", plus 失衡免疫). */
export const TRANSLATOR_CHANGE = 2;
const TRANSLATOR_IMMUNE = Object.freeze(['stun', 'sleep', 'cold', 'freeze', 'levitate', 'fear']);
/** Death-explosion radius when the enemy has no official radius [ASSUMED]. */
const BOOM_RADIUS = 1.25;
/** 萨卡兹枯朽战车 秽蚀轰击: radius of the 【污染秽蚀】 it leaves at its target (PRTS 萨卡兹枯朽战车 技能 "在目标位置生成半径1.7，
 *  持续10s的【污染秽蚀】" — the skill blackboard's range_radius 2.2 is its trigger range; the zone's radius is in no table). */
const TANK_ZONE_RADIUS = 1.7;
/** 【污染秽蚀】 ticks once per second; "同名效果不叠加": a unit inside several zones takes one tick per second. */
const POLLUTION_INTERVAL = 1;
/** "数个目标" of 假想敌：骨刺 while stealthed [ASSUMED]. */
const ACBUNN_TARGETS = 3;
/** 假想敌：再生 shield aura radius (PRTS 假想敌：再生 天赋 "进入此形态时，使半径1.8范围内的其他敌方单位（无视其可选性）获得5层…护盾"). */
const ACPUPP_AURA_RADIUS = 1.8;
/** 重弩突袭者 直击 reach along a row/column [ASSUMED]. */
const CROSS_REACH = 6;
/** 暴鸰 投弹: the target's tile and its 8 neighbours (PRTS "对目标及其周围八格的我方单位造成100%物理伤害"). */
const BOMB_REACH = 1;
/** 暴鸰 投弹: the bomb leaves on the OnAttack event of the cast's Attack clip (the official battle prefab's Boomb ability:
 *  animKey Attack, `_waitForAttackEvent`; the skeleton's OnAttack is on frame 8 of the 30 fps clip — data/assets.json
 *  hits.Attack 0.267, rounded — so exactly 8 sim ticks). It then flies as projectile_bombd (`_speed` 5 =
 *  PROJECTILE_SPEEDS.droneBomb, homing, `_ignoreCamouflage`). */
export const BOMBD_RELEASE = 8 / 30;
/** 暴鸰 投弹: the cast ends once the bomb has landed and no sooner than this after the release (the Boomb ability:
 *  `_fireAttackFinishWhenProjectileInvalid` 1, `_minPostDelayWhenProjectileInvalid` 0.667, `_waitForAnimEndWhenProjectileInvalid`
 *  0). Then its buff bomb_s (template switch_mode_restart_fsm: mode S1 + the move-speed modifier) — PRTS "技能结束后移速最终
 *  提升至200%"; the cast's end clip is already the bomb-less Idle_2 (`_endAnimKey`). */
export const BOMBD_POST_DELAY = 0.667;
/** 帝国炮火先兆者 shell (PRTS "普通攻击向目标所在位置发射一枚于3秒后命中的弹道，弹道对半径1.2范围内的所有我方单位造成攻击力
 *  100%的无来源物理伤害 … ※弹道始终使用缓存攻击力"): flight time and blast radius. */
const SHELL_FLIGHT = 3, SHELL_RADIUS = 1.2;
/** 假想敌：黑云 抓取: the blackboard radius counts ×2.5 (PRTS "2.5倍可变半径": range_radius 1.5 → 3.75), at most 3 prey,
 *  "短暂延迟后" the 延迟吞噬 lands (delay [ASSUMED] 0.5 s); its SP (= 全弹发射 hits) caps at the data's spData.maxSp. */
const GRAB_RADIUS_SCALE = 2.5, GRAB_MAX_PREY = 3, GRAB_DELAY = 0.5;
/** 孽罪奇美拉 污染模式 aura (PRTS 天赋 "自身半径1.2范围内的所有单位…每0.5秒受到50真实持续伤害（同类效果取最高）"): radius,
 *  damage period (s). */
const CHIMERA_AURA_RADIUS = 1.2, CHIMERA_AURA_EVERY = 0.5;
/** 自行炮 Cannon (PRTS 高准度伦蒂尼姆城防自行炮 技能 "以攻击范围内生命上限最高的我方单位为中心，生成9格的炮击区域，6s内每0.5s对炮击
 *  区域中生命比例最高的我方单位进行攻击…(最多进行10次攻击)"): shot interval (s), shot cap; 3 shots 1 s apart [ASSUMED] until
 *  0.1.1. 备注: during the skill animation 失衡免疫 + 晕眩 / 冻结 / 浮空 / 沉睡免疫 — held over the bombardment [ASSUMED length]. */
const CANNON_EVERY = 0.5, CANNON_SHOTS = 10;
const CANNON_IMMUNE = Object.freeze(['stun', 'freeze', 'cold', 'levitate', 'sleep']);
/** 枯朽之种 summoned per BornBugs cast ("数个") [ASSUMED]. */
const BUGS_PER_CAST = 3;
/** Radius of 骸骨拷打者's "周围" death sensing when its talent has no Attack.range_radius [ASSUMED]. */
const TORTURER_RADIUS = 1;
/** Barrel zone radius of 咸鳞汁推荐者 [ASSUMED]. */
const BARREL_RADIUS = 1.5;
/** "短时间" DEF-down of 碎骨's grenade [ASSUMED]. */
const SKULSR_DEFDOWN_DUR = 3;
/** W's C4 fuse and blast radius [ASSUMED]. */
const C4_FUSE = 1, C4_RADIUS = 1;
/** Every Nth attack for "数次攻击后" abilities without an SP cost in the data [ASSUMED]; with a cost N = spCost + 1
 *  (official 粉碎攻坚手 text for spCost 2: "攻击2次后，下一次攻击" ⇒ 3rd; 码头水手 / 澪 / 清扫小队 spCost 3 ⇒ 4th). */
const NTH_ATTACK = 3;
export const nthOf = (s) => (s && s.sp > 0 ? s.sp + 1 : NTH_ATTACK);
/** 鼠王 【唱沙】 cross reach and 【沙狱】 "及其周围" radius [ASSUMED]. */
const DRIFT_REACH = 1, SANDSTORM_RADIUS = 1;
/** 巨大的丑东西 self-destruct radius ("大范围晕眩") [ASSUMED]. */
const MCM_BOMB_RADIUS = 2.5;
/** 自在 【纬地经天】: tiles covered along the row and the column of the centre ("十字型") [ASSUMED]. */
const XI_CROSS_REACH = 2;
/** 扎罗: form-2 "远程" attack radius, 【远古威慑】 aura radius / ASPD (no numbers in the data), 溶血骇惧 HP loss per second
 *  reached at the end of duration_bleed (share of max HP, rising linearly — "逐渐加速失去生命值") [ASSUMED]. */
const WOLF_RANGE = 2.5, WOLF_AWE_RADIUS = 2.5, WOLF_AWE_ASPD = -30, WOLF_BLEED_PEAK = 0.05;
/** 失衡 movement speed that turns 弧光锋卫's per-interval bleed into HP per tile moved [ASSUMED]. */
const UNBALANCE_SPEED = 5;
/** 乌顶巨角卢鲁 【角力对决】: the operator cannot be pushed (fixed tiles) ⇒ "更多伤害" multiplier [ASSUMED]. */
const ELK_FAIL_SCALE = 2;

// ---------------------------------------------------------------------------------------------------------------
// per-battle state + installation

const STATE = new WeakMap();
function stOf(b) {
  let st = STATE.get(b);
  if (!st) { st = { lpLoss: 0, freedAll: false, deathWatch: new Set() }; STATE.set(b, st); }
  return st;
}

/** Register the global dispatch hooks once per battle (idempotent). */
export function ensureInstalled(b) {
  const st = stOf(b);
  if (st.installed) return st;
  st.installed = true;
  b.on('enemySpawn', ({ enemy }) => onSpawn(b, enemy), { priority: 100 });
  b.on('hit', (c) => onHitOut(b, c), { priority: 200 });
  b.on('hit', (c) => chaliceShare(b, c), { priority: -400 });
  b.on('hit', (c) => onHitIn(b, c), { priority: -500 });
  b.on('damaged', (c) => onDamaged(b, c), { priority: 50 });
  b.on('beforeAttack', (c) => onBeforeAttack(b, c), { priority: 50 });
  b.on('attack', (c) => { if (c.attacker && c.attacker.side === 'enemy') dispatch(b, c.attacker, 'attack', c); }, { priority: 50 });
  b.on('blocked', (c) => dispatch(b, c.enemy, 'blocked', c), { priority: 50 });
  b.on('kill', (c) => onKill(b, c), { priority: 1000 });
  b.on('death', (c) => onDeath(b, c), { priority: 50 });
  b.on('beforeStatus', (c) => {
    const ab = c.target && c.target.mem && c.target.mem.ab;
    if (!ab) return;
    if (ab.immune && ab.immune.has(c.status)) c.cancel = true;
  }, { priority: 50 });
  b.on('statusApplied', (c) => { if (c.target && c.target.side === 'enemy') dispatch(b, c.target, 'status', c); }, { priority: 50 });
  b.on('heal', (c) => {
    // 逐腐兽 bleeding ends when the target receives healing (natural regeneration excluded)
    if (c.amount > 0 && c.target && c.target.side === 'ally' && !(c.opts && c.opts.regen) && c.target.findBuff('ab:bleed')) b.removeBuff(c.target, 'ab:bleed');
  }, { priority: -50 });
  b.on('elementBurst', (c) => onBurst(b, c), { priority: 50 });
  b.on('tick', (c) => onTick(b, c.dt), { priority: 50 });
  b.on('battleEnd', ({ result }) => { if (st.lpLoss > 0 && result) result.lpLoss = (result.lpLoss ?? 0) + st.lpLoss; });
  return st;
}

export function install(battle) { ensureInstalled(battle); }
export function registerMeta() {}

// ---------------------------------------------------------------------------------------------------------------
// ability bookkeeping

/** The enemy's ability record (created on demand). */
export function abOf(b, e) {
  if (e.mem.ab) return e.mem.ab;
  const key = e.defId;
  const ov = (b.enemyOverrides && (b.enemyOverrides[key] ?? b.enemyOverrides[e.def && e.def.key])) || null;
  const raw = (e.def && e.def.raw) || {};
  const t = { ...((e.def && e.def.talent) || {}), ...((ov && ov.talents && ov.talents.bb) || {}) };
  const tS = { ...((raw.talents && raw.talents.bbStr) || {}), ...((ov && ov.talents && ov.talents.bbStr) || {}) };
  const sk = {};
  for (const s of (ov && Array.isArray(ov.skills) ? ov.skills : (e.def && e.def.skills) || [])) {
    if (!s || s.prefabKey == null) continue;
    sk[s.prefabKey] = { cd: num(s.cooldown, 0), icd: num(s.initCooldown, 0), sp: num(s.spCost, 0), bb: s.bb || {}, bs: s.bbStr || {} };
  }
  e.mem.ab = { key, t, tS, sk, list: [], times: null, hitShield: 0, atkType: null, immune: null, origMaxHp: e.base.maxHp };
  return e.mem.ab;
}

/** Attach abilities to an enemy (calls their spawn()). */
export function attach(b, e, list) {
  const ab = abOf(b, e);
  for (const a of list) {
    if (!a) continue;
    if (a.cd != null) a.left = num(a.left, num(a.icd, 0));
    ab.list.push(a);
    if (a.spawn) safe(b, e, () => a.spawn(b, e, a, ab));
  }
  return ab;
}

function safe(b, e, fn) {
  try { return fn(); } catch (err) { b._handlerError('content:enemies', e, err); return undefined; }
}

function dispatch(b, e, name, c) {
  const ab = e && e.mem && e.mem.ab;
  if (!ab) return false;
  let any = false;
  for (const a of ab.list) {
    const f = a[name];
    if (!f) continue;
    if (a.sil && e.s.flags.silence) continue;
    try { if (f.call(a, c, b, e, a, ab)) any = true; } catch (err) { b._handlerError(`enemies:${name}`, e, err); }
  }
  return any;
}

const num = (v, d) => (typeof v === 'number' && Number.isFinite(v) ? v : d);
/** First finite talent value among keys. */
export function T(ab, ...keys) { for (const k of keys) { const v = ab.t[k]; if (typeof v === 'number' && Number.isFinite(v)) return v; } return undefined; }

export function silenced(e) { return !!e.s.flags.silence; }
export function canCast(e, sil) { return e.alive && !e.hidden && !e.s.flags.stun && !(sil && e.s.flags.silence); }

// ---------------------------------------------------------------------------------------------------------------
// global dispatchers

function onSpawn(b, e) {
  const kit = KITS[e.defId];
  if (typeof kit !== 'function') return;
  const ab = abOf(b, e);
  const list = safe(b, e, () => kit(ab, e, b)) || [];
  attach(b, e, list);
}

function onHitOut(b, c) {
  const s = c.source;
  if (!s || s.side !== 'enemy' || !s.mem.ab || c.dmg.cancel) return;
  const ab = s.mem.ab;
  if (ab.atkType && c.dmg.isAttack && c.dmg.type !== 'element') c.dmg.type = ab.atkType;
  dispatch(b, s, 'hitOut', c);
}

function onHitIn(b, c) {
  const t = c.target;
  if (!t || t.side !== 'enemy' || !t.mem.ab || c.dmg.cancel) return;
  const ab = t.mem.ab;
  dispatch(b, t, 'hitIn', c);
  if (c.dmg.cancel) return;
  const ty = c.dmg.type;
  if (ab.hitShield > 0 && (ty === 'phys' || ty === 'arts')) {
    // "可以抵挡一次物理或法术伤害" / 再生's aura shield: the whole instance is negated
    c.dmg.cancel = true;
    ab.hitShield--;
    if (ab.hitShield <= 0) b.fx('shieldBreak', { x: t.x, y: t.y, id: t.id });
  }
}

function onDamaged(b, c) {
  const { source: s, target: t, dmg } = c;
  if (!dmg || dmg.type === 'element') return;
  if (t && t.side === 'enemy' && t.mem.ab) dispatch(b, t, 'taken', c);
  if (s && s.side === 'enemy' && s.mem.ab && dmg.isAttack && t && t.side === 'ally') dispatch(b, s, 'dealt', c);
}

function onBeforeAttack(b, c) {
  const a = c.attacker;
  if (a && a.side === 'enemy' && a.mem.ab) dispatch(b, a, 'before', c);
}

function onKill(b, c) {
  const v = c.victim;
  if (!v || v.side !== 'enemy' || !v.mem.ab) return;
  if (dispatch(b, v, 'killed', c) && v.hp > 0) c.stopPropagation = true; // revived: not a kill for anyone else
}

function onDeath(b, c) {
  const u = c.unit;
  const st = stOf(b);
  if (u && u.side === 'enemy' && u.mem.ab) dispatch(b, u, 'death', c);
  if (st.deathWatch.size) for (const w of [...st.deathWatch]) { if (!w.alive) { st.deathWatch.delete(w); continue; } dispatch(b, w, 'otherDeath', c); }
}

function onBurst(b, c) {
  const t = c.target;
  if (!t) return;
  if (t.side === 'enemy') { if (t.mem.ab) dispatch(b, t, 'burst', c); return; }
  // 假想敌：淤困 parasite: the host's burst spreads the same element to the 4 neighbouring allies
  const par = t.findBuff('ab:parasite');
  if (par && par.data && par.data.src) {
    const src = par.data.src;
    for (const o of alliesInTiles(b, t.tileR, t.tileC, 'plus', 1)) if (o !== t) elem(b, src, o, c.element, par.data.spread);
  }
}

function onTick(b, dt) {
  const list = b.enemies;
  const n = list.length;
  for (let i = 0; i < n; i++) {
    const e = list[i];
    if (!e || !e.alive || !e.mem.ab) continue;
    const ab = e.mem.ab;
    for (let j = 0; j < ab.list.length; j++) {
      const a = ab.list[j];
      if (!e.alive) break;
      if (a.tick) {
        if (!(a.sil && e.s.flags.silence)) {
          if (!(a.iv > 0)) safe(b, e, () => a.tick(b, e, a, dt));
          else {
            a._acc = (a._acc ?? 0) + dt;
            let k = 0;
            while (a._acc >= a.iv - 1e-9 && k++ < 4 && e.alive) { a._acc -= a.iv; safe(b, e, () => a.tick(b, e, a, a.iv)); }
          }
        }
      }
      if (a.fire && a.cd != null) {
        a.left -= dt;
        if (a.left <= 1e-9 && canCast(e, a.sil) && (!a.cond || safe(b, e, () => a.cond(b, e, a)))) {
          a.left = Math.max(TICK, a.cd);
          a.casts = (a.casts ?? 0) + 1;
          e.skillAnimUntil = b.time + 0.5;
          safe(b, e, () => a.fire(b, e, a));
        }
      }
    }
  }
}

// ---------------------------------------------------------------------------------------------------------------
// helpers (exported for bosses.js)

/** Element damage (erosion mapped onto the engine gauge). */
export function elem(b, src, tgt, el, amount) {
  if (!tgt || !tgt.alive || !(amount > 0)) return 0;
  const element = el === 'erosion' ? EROSION : el;
  return b.dealDamage(src, tgt, { type: 'element', element, amount, tags: ['enemyAbility'] });
}

/** Skill / ability damage (no dodge unless asked). */
export function hurt(b, src, tgt, amount, type = 'phys', { canDodge = false, tags = [], isSkill = true } = {}) {
  if (!tgt || !tgt.alive || !(amount > 0)) return 0;
  return b.dealDamage(src, tgt, { amount, type, canDodge, isSkill, tags: ['enemyAbility', ...tags] });
}

/** Allies whose tile is within `n` of (r, c): 'plus' = Manhattan (周围四格), 'box' = Chebyshev (周围8格). */
export function alliesInTiles(b, r, c, shape = 'plus', n = 1) {
  const out = [];
  for (const a of b.allies()) {
    if (a.hidden) continue;
    const dr = Math.abs(a.tileR - r), dc = Math.abs(a.tileC - c);
    if (shape === 'plus' ? dr + dc <= n : Math.max(dr, dc) <= n) out.push(a);
  }
  return out;
}

/** Allies within radius that enemy `e` could target (ranged rules: stealth / untargetable skipped). */
export function targetsNear(b, e, r, { ranged = true, x = e.x, y = e.y } = {}) {
  return b.alliesInRadius(x, y, r).filter((a) => canTargetAlly(e, a, ranged));
}

/** Every targetable ally on the field. */
export function allTargets(b, e) {
  return b.allies().filter((a) => canTargetAlly(e, a, true));
}

/** Engine priority (blocker → taunt → latest deployed) on a copy. */
export function byPriority(e, list) { return sortAllyTargets(e, list.slice()); }

/** An HP-loss / damage zone. `tick(units)` runs every `iv` s for `life` s on the allies inside. */
export function zone(b, { x, y, r, life, iv = 1, kind = 'zone', tick }) {
  b.fx('zone', { x, y, r, dur: life, kind });
  let left = life;
  const h = b.every(iv, () => {
    tick(b.alliesInRadius(x, y, r));
    left -= iv;
    if (left <= 1e-6) h.cancel();
  });
  return h;
}

/** Remaining route of an enemy from its current position (for summons / phantoms that continue its path). */
export function remainingRoute(e) {
  const R = e.route;
  const here = [e.y, e.x];
  if (!R || !Array.isArray(R.legs) || !R.legs.length) return { motion: e.motion === 'FLY' ? 'FLY' : 'WALK', start: here, end: here, checkpoints: [] };
  const steps = [];
  let end = null;
  for (let i = Math.max(0, R.legIdx); i < R.legs.length; i++) {
    const L = R.legs[i];
    if (L.final) { end = [L.r, L.c]; break; }
    if (L.t === 'move') steps.push({ t: 'move', p: [L.r, L.c] });
    else if (L.t === 'wait') steps.push({ t: 'wait', s: i === R.legIdx && R.waitLeft != null ? R.waitLeft : L.time });
    else if (L.t === 'disappear') steps.push({ t: 'disappear' });
    else if (L.t === 'appear') steps.push({ t: 'appear', p: [L.r, L.c] });
  }
  if (!end) { const last = R.legs[R.legs.length - 1]; end = last && last.r != null ? [last.r, last.c] : [Math.round(e.y), Math.round(e.x)]; }
  const route = { motion: e.motion === 'FLY' ? 'FLY' : 'WALK', start: here, end, checkpoints: [] };
  if (steps.length) route.steps = steps;
  return route;
}

/** A route that keeps an enemy in place (content moves it by hand). */
export function stayRoute(e, secs = 99999) {
  const p = [Math.round(e.y), Math.round(e.x)];
  return { motion: e.motion === 'FLY' ? 'FLY' : 'WALK', start: p, end: p, steps: [{ t: 'wait', s: secs }] };
}

/** Spawn `n` enemies at the parent's position that continue its route. Returns the spawned units. */
export function spawnChildren(b, parent, key, n, opts = {}) {
  const out = [];
  const route = opts.route ?? remainingRoute(parent);
  const cnt = Math.max(0, Math.min(20, Math.floor(n)));
  for (let i = 0; i < cnt; i++) {
    const off = cnt > 1 ? (i - (cnt - 1) / 2) * 0.2 : 0;
    const pos = opts.pos ?? [parent.y, parent.x + off];
    const c = b.spawnEnemy(key, {
      pos, route, mods: opts.mods ?? parent.mods ?? null, tag: opts.tag ?? null, countInTotal: opts.countInTotal,
      ownerPlayerId: parent.ownerId ?? null, sourcePlayerId: parent.sourcePlayerId ?? null,
    });
    if (c) out.push(c);
  }
  if (out.length) b.fx('summon', { x: parent.x, y: parent.y, id: parent.id, key, n: out.length });
  return out;
}

/** Move a unit straight toward (tx, ty) by `dist` tiles. Returns true on arrival. */
export function stepToward(u, tx, ty, dist) {
  const dx = tx - u.x, dy = ty - u.y;
  const d = Math.hypot(dx, dy);
  if (d <= dist + 1e-9) { u.x = tx; u.y = ty; return true; }
  u.x += (dx / d) * dist;
  u.y += (dy / d) * dist;
  return false;
}

/** Set a 频次 unit's hits (maxHp := hits, full). */
export function setHits(e, n) {
  const h = Math.max(1, Math.round(n));
  e.base.maxHp = h;
  e.markDirty();
  void e.s;
  e.hp = h;
}

const HIT_COUNT_KEY = 'ab:hitCount';
/** 频次 on/off: every damage instance removes exactly 1 HP (engine flag; `artsOnly` = 茶器, physical instances remove 0). */
export function hitCount(b, e, on, artsOnly = false) {
  if (!on) { b.removeBuff(e, HIT_COUNT_KEY); return; }
  b.addBuff(e, { key: HIT_COUNT_KEY, persist: true, flags: artsOnly ? { hitCountArts: true } : { hitCount: true } });
}
export const isHitCount = (e) => !!e.findBuff(HIT_COUNT_KEY);

/**
 * The enemy's model takes another form (render/units.js FORMS: a clip set of its skeleton): kept on the unit
 * (`e.form`, published by snapshot.js unitInfo — a view built mid-battle from fieldMeta(): a teammate's field watched
 * later, 联防 observers, a reconnect — starts in it) and announced by the fx `fxKind` (+ id, x, y, `params`) carrying it
 * as `form` (a 'phase' fx also as its `kind`). The `form` key marks the fx as state (shared/protocol.js fxForm): the
 * client never drops it, not in a catch-up frame nor while its tab is hidden. Barrier / charge 'phase' kinds are no
 * forms: they go through b.fx directly, without `form`.
 */
export function setForm(b, e, form, fxKind = 'phase', params = null) {
  e.form = form;
  b.fx(fxKind, fxKind === 'phase' ? { ...params, x: e.x, y: e.y, id: e.id, kind: form, form } : { ...params, x: e.x, y: e.y, id: e.id, form });
}

/** Leader "扣除目标生命" effects: recorded for the match (hook 'lpLoss' + result.lpLoss). */
export function lpLoss(b, amount, reason, source = null) {
  if (!(amount > 0)) return;
  const st = stOf(b);
  st.lpLoss += amount;
  b.fx('lpLoss', { x: source ? source.x : 0, y: source ? source.y : 0, value: amount, reason });
  b.emit('lpLoss', { amount, reason, source });
}

/** 暴露: damage taken ×scale for `dur` s. */
export function expose(b, u, dur, scale) {
  if (!u || !u.alive || !(dur > 0)) return;
  b.addBuff(u, { key: 'ab:exposed', duration: dur, refresh: 'extend', mods: { dmgTakenMul: scale }, visible: true });
  b.fx('expose', { x: u.x, y: u.y, id: u.id });
}

/**
 * Final HP damage the pipeline would deal for a phys/arts/true/elemental `dmg` before shields (mitigation is linear in
 * the amount) — the same terms as damage.js dealDamage (元素伤害: 元素抗性 + elementalTakenMul, no dmgTakenMul).
 */
export function expectedFinal(src, tgt, dmg) {
  const ts = tgt.s, ss = src && src.s && !dmg.sourceless ? src.s : null, ty = dmg.type; // 无来源 (bursts): no source stats
  const v = mitigate(dmg.amount, ty, ts, {
    defIgnorePct: (dmg.defIgnorePct || 0) + (ss ? ss.defIgnorePct : 0), defIgnoreFlat: (dmg.defIgnoreFlat || 0) + (ss ? ss.defIgnoreFlat : 0),
    resIgnorePct: (dmg.resIgnorePct || 0) + (ss ? ss.resIgnorePct : 0), resIgnoreFlat: (dmg.resIgnoreFlat || 0) + (ss ? ss.resIgnoreFlat : 0),
    elementalRes: ty === 'elemental' ? (tgt.def?.epDamageResistance ?? 0) : 0,
  });
  let mul = (dmg.mul ?? 1) * (ty === 'elemental' ? 1 : ts.dmgTakenMul); // 脆弱 skips 元素伤害 (damage.js)
  if (ss) mul *= ss.dmgDealtMul * (ty === 'phys' ? ss.physDealtMul : ty === 'arts' ? ss.artsDealtMul : 1);
  mul *= ty === 'phys' ? ts.physTakenMul : ty === 'arts' ? ts.artsTakenMul : ty === 'elemental' ? ts.elementalTakenMul : ts.trueTakenMul;
  const f = v * mul;
  return Number.isFinite(f) && f > 0 ? f : 0;
}

/**
 * "吸收法术伤害的屏障": absorb up to `left` of an arts instance in a `hit` handler (after RES, like a shield) by scaling
 * the instance down (cancelled when fully absorbed). Returns the amount absorbed.
 */
export function absorbArts(c, left) {
  if (!c || c.dmg.type !== 'arts' || !(left > 0) || c.dmg.cancel) return 0;
  const f = expectedFinal(c.source, c.target, c.dmg);
  if (!(f > 0)) return 0;
  const take = Math.min(left, f);
  if (take >= f - 1e-9) c.dmg.cancel = true;
  else c.dmg.amount *= (f - take) / f;
  return take;
}

/** Timed buff on each unit (same key never stacks: aura semantics). */
function auraBuff(b, u, key, iv, mods, flags = null, visible = false) {
  b.addBuff(u, { key, duration: iv + 0.1, refresh: 'replace', mods, flags, visible });
}

/** Mark an ally/enemy ability as watching every death on the field. */
function watchDeaths(b, e) { stOf(b).deathWatch.add(e); }

const tileOf = (u) => [Math.round(u.y), Math.round(u.x)];
const onTerrain = (b, u, terrain) => { const [r, c] = tileOf(u); return b.grid.tile(r, c).terrain === terrain; };

// ---------------------------------------------------------------------------------------------------------------
// archetypes

/** 隐匿: permanent stealth. */
const stealth = () => ({ spawn(b, e) { b.addBuff(e, { key: 'ab:stealth', flags: { stealth: true }, persist: true }); } });
/** 无法被阻挡. */
const unblockable = () => ({ spawn(b, e) { b.addBuff(e, { key: 'ab:unblockable', flags: { unblockable: true }, persist: true }); } });
/**
 * "受到伤害时开始奔跑，移动速度+N%" (鸭爵 `run.attack@move_speed`): the first damage it takes ⇒ move speed ×(1 + v) for good —
 * PRTS 鸭爵 天赋 "移动速度+400%" for v 4, PRTS 卫戍协议：盟约 下半/PRTS盟约记录 鸭爵 备注 "受伤后移动速度+300%" for the act2 v 3.
 */
const runWhenHit = (v) => ({ taken(c, b, e, a) { if (a.on || !(v > 0)) return; a.on = true; b.addBuff(e, { key: 'ab:duckRun', persist: true, mods: { moveMul: 1 + v } }); } });
/** 频次: maxHp = hits. */
const times = (artsOnly = false) => ({ spawn(b, e) { setHits(e, e.def.maxHp); hitCount(b, e, true, artsOnly); } });
/** "只能被阻挡数大于等于N的单位阻挡". */
const blockWeight = (n) => ({ spawn(b, e) { e.blockWeight = n; } });
const taunt = (n) => ({ spawn(b, e) { if (n) b.addBuff(e, { key: 'ab:taunt', mods: { taunt: n }, persist: true }); } });
const maxTargets = (n) => ({ spawn(b, e) { if (n > 1) e.profile.maxTargets = n; } });
/** Element damage on every attack hit: ATK × ratio. */
const ep = (el, ratio, sil = false) => ({ sil, dealt(c, b, e) { if (ratio > 0) elem(b, e, c.target, el, e.s.atk * ratio); } });
/** Status on every attack hit. */
const onHitStatus = (key, dur, value) => ({ dealt(c, b, e) { if (dur > 0) b.applyStatus(c.target, key, { duration: dur, source: e, value }); } });
/** Attack hits every targetable ally within radius r (+ optional extra selector). */
const hitAllInRadius = (r) => ({ before(c, b, e) { const l = targetsNear(b, e, r); if (l.length) c.targets = byPriority(e, l); } });
/**
 * 抵抗 (ba.buffres, the engine `resist` status: control durations halved, 麻痹 loses 1 stack every 5 s) + optional
 * immunities. Value from the talent's `Buff.one_minus_status_resistance` when present (−0.5 ⇒ half).
 */
const resist = (immune = []) => ({
  spawn(b, e, a, ab) {
    const v = -(T(ab, 'Buff.one_minus_status_resistance') ?? -0.5);
    b.applyStatus(e, 'resist', { source: e, value: v > 0 ? Math.min(1, v) : 0.5 });
    if (immune.length) ab.immune = new Set([...(ab.immune || []), ...immune]);
  },
});
const immuneTo = (...keys) => ({ spawn(b, e, a, ab) { ab.immune = new Set([...(ab.immune || []), ...keys]); } });

/** Every Nth attack: status on the targets ("攻击2次后，下一次攻击会晕眩目标"). */
const nthAttackStatus = (n, key, dur, sil = true) => ({
  sil,
  spawn(b, e, a) { a.n = 0; },
  attack(c, b, e, a) {
    a.n++;
    if (a.n % n) return;
    for (const t of c.targets) if (t.alive && dur > 0) b.applyStatus(t, key, { duration: dur, source: e });
  },
});
/** Every Nth attack deals ×scale (+ optional element). */
const nthAttackPower = (n, scale, el = null, ratio = 0) => ({
  spawn(b, e, a) { a.n = 0; a.power = false; },
  before(c, b, e, a) { a.power = (a.n + 1) % n === 0; },
  hitOut(c, b, e, a) { if (a.power && c.dmg.isAttack) c.dmg.amount *= scale; },
  dealt(c, b, e, a) { if (a.power && el && ratio > 0) elem(b, e, c.target, el, e.s.atk * ratio); },
  attack(c, b, e, a) { a.n++; },
});

/** Aura on other enemies within r: timed buff refreshed every iv s. */
const enemyAura = (r, key, mods, sil = true, iv = 0.5) => ({
  sil, iv,
  tick(b, e) { for (const o of b.enemiesInRadius(e.x, e.y, r)) if (o !== e) auraBuff(b, o, key, iv, mods); },
});
/** Aura on allies within r. */
const allyAura = (r, key, mods, sil = true, iv = 0.5, flags = null) => ({
  sil, iv,
  tick(b, e) { for (const u of b.alliesInRadius(e.x, e.y, r)) auraBuff(b, u, key, iv, mods, flags, true); },
});

/** Self ATK buff once HP first drops below ratio. */
const lowHpBuff = (ratio, mods, key = 'ab:lowhp') => ({
  taken(c, b, e, a) {
    if (a.on || !(e.hpRatio < ratio)) return;
    a.on = true;
    b.addBuff(e, { key, mods, persist: true, visible: true });
  },
});

/** Death spawn ("被击倒后生成N个<X>"). */
const deathSpawn = (key, cnt, extra = {}) => ({
  death(c, b, e) { if (c.reason === 'killed' && key && cnt > 0) spawnChildren(b, e, key, cnt, extra); },
});

/** Death explosion on allies within r. */
const deathBoom = ({ scale, type = 'phys', r = BOOM_RADIUS, status = null, sil = true, cond = null }) => ({
  sil,
  death(c, b, e, a) {
    if (c.reason !== 'killed' || (cond && !cond(e, a))) return;
    const atk = e.s.atk;
    b.fx('explode', { x: e.x, y: e.y, r, kind: 'deathBoom', id: e.id });
    for (const u of b.alliesInRadius(e.x, e.y, r)) {
      if (scale > 0) hurt(b, e, u, atk * scale, type);
      if (status && u.alive) b.applyStatus(u, status.key, { duration: status.dur, source: e, value: status.value });
    }
  },
});

/** 折射: RES +v (and optional max HP +hpPct) while not silenced. */
const refraction = (res, hpPct = 0) => ({
  silAware: true,                                                    // SILENCE-flagged: silence switches it off in tick()
  tick(b, e, a) {
    const on = !e.s.flags.silence;
    if (on === a.on) return;
    a.on = on;
    if (on) b.addBuff(e, { key: 'ab:refraction', mods: hpPct ? { resFlat: res, hpPct } : { resFlat: res }, persist: true, visible: true });
    else b.removeBuff(e, 'ab:refraction');
  },
});

/**
 * 近地悬浮 (ba.float "无法被阻挡或近战攻击"; PRTS 术语释义: "此类效果开始时，单位强制解除阻挡，随后行动方式变为飞行（算作空中
 * 单位）… 无论飞行与否，单位只会采用地面寻路"): while floating the enemy carries the 'ab:float' buff — unblockable, an air unit for
 * every targeting / ground-only rule (flag `float` ⇒ Unit.isFlying: melee operators, 迷迭香's ground-only shots and
 * splash, ground traps and terrain skip it; ranged attacks hit it) with 失衡免疫 (`noDisplace`, "初始模式：近地悬浮，失衡
 * 免疫" on the enemies' PRTS pages) — its `motion` stays WALK, so it keeps the ground path (and 浮空 can still lift it:
 * Battle.applyStatus refuses data flyers only). Losing the float is each
 * enemy's own ability (PRTS; 缚地 "使部分近地悬浮敌人掉落" is "实为敌人自身的能力"): kitSyufo, kitParrot. 喷气人's 飞行模式 is
 * the same state for 7 s (its 'ab:takeoff' buff carries the flags; kitLeaderMisc).
 */
const FLOAT_KEY = 'ab:float';
const setFloat = (b, e, on) => {
  if (on) b.addBuff(e, { key: FLOAT_KEY, flags: { unblockable: true, float: true, noDisplace: true }, persist: true });
  else b.removeBuff(e, FLOAT_KEY);
};
const float = () => ({ spawn(b, e) { setFloat(b, e, true); } });
/** The enemies whose kit spawns them hovering (float()): the match's bot counts them as air units (bot.js fieldModel). */
export const HOVER_KEYS = Object.freeze(['enemy_2025_syufo', 'enemy_10045_parrot']);

/**
 * "生命值首次降至一半以下时，在数秒内陷入恐惧" (SelfFear; PRTS “萨科塔之翼/之眼/昂首” "生命值首次低于50%时，对自身施加持续5s的恐惧，
 * 在5s内移动速度最终提升至150%"). The fear's source is the enemy itself, so it has no 恐惧可达地块: for SelfFear.fear s it
 * flies to random points of its own tile (±0.25) at ×move_speed — the engine's 恐惧 movement (fear.js; user playtest #6
 * item 13, "小范围乱飞") — then flies on along its route.
 */
const selfFear = (ab) => ({
  taken(c, b, e, a) {
    if (a.done || !(e.hpRatio < 0.5)) return;
    a.done = true;
    const fear = T(ab, 'SelfFear.fear') ?? 0;
    if (fear > 0) b.applyStatus(e, 'fear', { duration: fear, source: e });
    // PRTS “萨科塔之翼/之眼”: "在5s内移动速度最终提升至150%" — move_speed 1.5 is the final multiplier
    const ms = T(ab, 'SelfFear.move_speed') ?? 0, sd = T(ab, 'SelfFear.speed_duration') ?? 0;
    if (ms > 0 && sd > 0) b.addBuff(e, { key: 'ab:fearRun', duration: sd, mods: { moveMul: ms }, flags: { unblockable: true } });
  },
});

/** Prisoners (禁锢 → 解放). */
function prisoner(ab, { freeAll = false } = {}) {
  const t = (k) => T(ab, k) ?? 0;
  const liberate = (b, e, a) => {
    if (a.free || !e.alive) return;
    a.free = true;
    b.removeBuff(e, 'ab:confined');
    b.addBuff(e, { key: 'ab:liberty', persist: true, visible: true, mods: {
      atkPct: t('liberty.atk'), defIgnorePct: t('liberty.def_penetrate'), resFlat: t('liberty.magic_resistance'), hpRegen: t('liberty.hp_recovery_per_sec') } });
    b.fx('liberate', { x: e.x, y: e.y, id: e.id });
    if (freeAll && !stOf(b).freedAll) {
      // "第一次解放时同时解放全场敌人"
      stOf(b).freedAll = true;
      for (const o of b.aliveEnemies()) for (const x of (o.mem.ab ? o.mem.ab.list : [])) if (x.liberate && !x.free) x.liberate(b, o, x);
    }
  };
  return {
    liberate,
    spawn(b, e, a) {
      a.n = 0; a.free = false;
      b.addBuff(e, { key: 'ab:confined', persist: true, visible: true, mods: { aspd: t('confinement.attack_speed'), defFlat: t('confinement.def') } });
    },
    attack(c, b, e, a) { if (!a.free && ++a.n >= (T(ab, 'confinement.times') ?? 4)) liberate(b, e, a); },
  };
}

/** Free every confined prisoner on the field (重犯's first liberation, 杰斯顿's killer form). */
function freeAllPrisoners(b) {
  for (const o of b.aliveEnemies()) for (const x of (o.mem.ab ? o.mem.ab.list : [])) if (x.liberate && !x.free) x.liberate(b, o, x);
}

/**
 * 重生 "清空自身身上除白名单外所有Buff" (PRTS 特殊机制 §重生): at a 重生 (reborn(), husk(), statue()) the enemy loses every
 * buff an operator / summon / device put on it and every source-less catalogue status (晕眩, 减速, 恐惧, 脆弱, 诱导 … —
 * buffs.js STATUS). Kept [ASSUMED: the whitelist]: its talents and traits (`persist` buffs, and what it or another enemy
 * gave it — 锏's 抵抗 is a self-applied status, enemy auras refresh every few tenths of a second anyway) and the field's
 * state buffs without a source (terrain, airflow — re-applied by position — and element burst locks). Without it a 逐火
 * knocked out while feared (叙拉古 / 妮芙: 恐惧 makes it unblockable) stayed unblockable — so, 隐匿, untargetable — as an
 * ember until the fear ran out.
 */
/**
 * The end of a 重生 (PRTS 特殊机制 §重生 "重生结束时，重置自身的通用技能与当前形态的技能冷却为初始冷却"): every ability with a
 * cooldown starts again from its initial cooldown (until 0.1.1 the countdowns ran on through the 重生).
 */
function rebirthCooldowns(e) {
  for (const s of (e.mem.ab && e.mem.ab.list) || []) if (s.cd != null) s.left = num(s.icd, 0);
}

function rebirthCleanse(b, e) {
  for (const x of e.buffs.slice()) {
    if (x.persist || (x.source && x.source.side === 'enemy')) continue;
    if (x.source || x.status) b.removeBuff(e, x);
  }
}

/**
 * "首次被击倒后重生 / 进入第二形态": the first knock-out is hidden (kill credit and bounty wait for the real death) and starts
 * a rebirth of `dur` s — statuses cleared (rebirthCleanse), invulnerable, untargetable, released by its blocker, inert
 * (no move / attack / skill).
 * `onKo(b, e, a)` runs at once (self-destruct, freeing prisoners …), `during(b, e, a, elapsed)` every tick of it; then the
 * enemy stands up with `hpRatio` of its max HP, `onReborn(b, e, a)` switches the form and `invincible` s of 无敌 follow.
 * `a.state`: undefined → 'reborn' → 'form2'. The 'telegraph' fx of the knock-out carries `form: 'reborn'` and the 'revive'
 * fx `form: 'form2'`: models with those clip sets (render/units.js FORMS — 锏, 扎罗, “复仇者”, 杰斯顿) play them.
 */
function reborn({ dur = 0, hpRatio = 1, invincible = 0, onKo = null, during = null, onReborn = null, key = 'ab:reborn' } = {}) {
  const finish = (b, e, a) => {
    if (!e.alive || a.state !== 'reborn') return;
    a.state = 'form2';
    b.removeBuff(e, key);
    e.profile.noAttack = a.noAtk;
    if (onReborn) safe(b, e, () => onReborn(b, e, a));
    e.hp = Math.max(1, e.s.maxHp * Math.max(0, Math.min(1, hpRatio)));
    if (invincible > 0) b.addBuff(e, { key: `${key}:inv`, duration: invincible, visible: true, flags: { invulnerable: true } });
    if (e.route) e.route.pts = null;
    e.atkCd = 0;
    rebirthCooldowns(e);
    setForm(b, e, 'form2', 'revive', { kind: 'reborn' });
  };
  return {
    killed(c, b, e, a) {
      if (a.state) return false;
      a.state = 'reborn';
      a.t0 = b.time;
      a.noAtk = e.profile.noAttack;
      rebirthCleanse(b, e);
      e.hp = Math.min(1, e.s.maxHp);
      if (onKo) safe(b, e, () => onKo(b, e, a));
      if (!(dur > 0)) { finish(b, e, a); return true; }
      e.profile.noAttack = true;
      b.addBuff(e, {
        key, duration: dur, visible: true, persist: true,
        flags: { invulnerable: true, untargetable: true, unblockable: true, noMove: true, stun: true },
        onTick: during ? ({ battle }) => during(battle, e, a, battle.time - a.t0) : null,
        onExpire: ({ battle }) => finish(battle, e, a),
      });
      setForm(b, e, 'reborn', 'telegraph', { r: 1, dur, kind: 'reborn' });
      return true;
    },
  };
}

/** 正面减伤: phys/arts damage from allies in front of the enemy (`a.facing` side) × (1 − cut); `face` updates a.facing. */
function frontGuard(cut, face) {
  return {
    spawn(b, e, a) { a.facing = -1; a.px = e.x; },
    tick(b, e, a) { face(b, e, a); },
    hitIn(c, b, e, a) {
      const s = c.source, ty = c.dmg.type;
      if (!s || s.side !== 'ally' || (ty !== 'phys' && ty !== 'arts') || !(cut > 0)) return;
      if ((s.x - e.x) * a.facing > 1e-6) c.dmg.mul *= Math.max(0, 1 - cut);
    },
  };
}
/** Faces its walking direction (horizontal component; keeps the last one while standing). */
const faceMove = (b, e, a) => { const dx = e.x - a.px; if (Math.abs(dx) > 1e-6) a.facing = dx > 0 ? 1 : -1; a.px = e.x; };
/** "始终面向我方干员数量较多的方向": the side with more deployed operators (ties keep the current facing). */
const faceCrowd = (b, e, a) => {
  let l = 0, r = 0;
  for (const u of b.allies()) { if (u.kind !== 'op') continue; if (u.x > e.x + 1e-6) r++; else if (u.x < e.x - 1e-6) l++; }
  if (r !== l) a.facing = r > l ? 1 : -1;
};

/**
 * 失衡 (unbalanced movement): being pushed / pulled by operators. battle.displace() has no hook, so it is detected as
 * movement beyond the enemy's own route speed between two ticks (teleport legs excluded). `onMove(b, e, a, tiles)`.
 */
function unbalanced(onMove) {
  return {
    tick(b, e, a, dt) {
      const px = a.px, py = a.py, hid = a.hid;
      a.px = e.x; a.py = e.y; a.hid = e.hidden;
      if (px == null || hid || e.hidden) return;
      const own = e.s.moveSpeed * MOVE_SCALE * dt * 1.5 + 1e-3;
      const extra = Math.hypot(e.x - px, e.y - py) - own;
      a.lx = px; a.ly = py;                                          // where the move started (direction for onMove)
      if (extra > 0.05) onMove(b, e, a, extra);
    },
  };
}

/** An arts-only barrier ("吸收法术伤害的屏障") of `amount`; `a.left` = what is left, `refresh(b, e)` restores it. */
function artsBarrier(amount, { key = 'ab:artsBarrier', whileUp = null } = {}) {
  return {
    refresh(b, e, a) {
      a.left = amount;
      b.fx('phase', { x: e.x, y: e.y, id: e.id, kind: 'artsBarrier', value: amount });
      if (whileUp) b.addBuff(e, { key, persist: true, visible: true, mods: whileUp });
    },
    spawn(b, e, a) { if (amount > 0) a.refresh(b, e, a); },
    hitIn(c, b, e, a) {
      if (!(a.left > 0)) return;
      a.left -= absorbArts(c, a.left);
      if (a.left > 1e-6) return;
      a.left = 0;
      b.fx('shieldBreak', { x: e.x, y: e.y, id: e.id });
      // the bonus it grants ends once the overflow of the breaking hit has landed (never before: an HP bonus removed
      // first would rescale HP and make the overflow count twice)
      if (c.dmg.cancel) b.removeBuff(e, key); else a.breaking = true;
    },
    taken(c, b, e, a) { if (a.breaking) { a.breaking = false; b.removeBuff(e, key); } },
  };
}

/**
 * "被击倒时暂时变为…，一段时间后重生" (talent Revive[Trigger]: 逐火 embers, 假想敌：再生's puppet). A knock-out of the first form is
 * no kill (credit, bounty and the kill count wait for the real death): HUSK_REBIRTH s of 重生 first — statuses cleared
 * (rebirthCleanse: a feared warrior is no unblockable ember), invulnerable, untargetable, unblockable, immobile, 失衡免疫
 * (PRTS 深池逐火战士 天赋 "被击倒后重生，持续1s，随后变为怨恨的余烬，1s内不移动且持有无敌+无法阻挡+失衡免疫"; PRTS 特殊机制 §重生) —
 * then the husk until `delay` s after that: `hits` HP of 特殊生命值机制 (every damage instance removes 1 — PRTS 特殊机制
 * §特殊生命值机制; engine flag hitCount), no attack (缴械), walking its route on — 隐匿 (`stealthy`: targetable only while
 * blocked, targeting.js canTargetEnemy — the 余烬 must be blocked to be beaten; drawn solid while blocked)
 * and / or unblockable (`unblock`: 再生's 傀儡 "不可被阻挡"). Killing the husk is the real death; a husk still standing
 * after `delay` s stands up in its first form with full HP, and every later knock-out starts it again ("一次又一次地站起").
 * `onHusk(b, e)` runs as the husk begins, after the 重生 ("进入此形态时": 再生's shields).
 * User report after 0.1.0 (#8): the v2.5 ember stood still, stealthed AND unblockable — nobody could ever target it.
 * fx (setForm): 'ember' {id, hits, dur, form: 'husk'} at the knock-out, 'revive' {id, form: 'revived'} when it stands
 * up (the renderer switches the model's clip set: render/units.js FORMS).
 */
function husk({ hits, delay, stealthy = true, unblock = false, onHusk = null, key = 'ab:ember' }) {
  const revive = (b, e, a) => {
    if (!e.alive || a.state !== 'husk') return;
    a.state = null;
    hitCount(b, e, false);
    e.base.maxHp = a.max;
    e.markDirty();
    void e.s;
    e.hp = e.s.maxHp;
    e.profile.noAttack = a.noAtk;
    b.removeBuff(e, key);
    b.removeBuff(e, `${key}:reborn`);
    if (e.route) e.route.pts = null;
    e.atkCd = 0;
    setForm(b, e, 'revived', 'revive');
  };
  return {
    killed(c, b, e, a) {
      // an HP loss (流失 bypasses 无敌) during the 1 s 重生 cannot cut it short
      if (a.state === 'husk' && b.time < a.rebornUntil) { e.hp = e.s.maxHp; return true; }
      if (a.state === 'husk' || !(hits > 0) || !(delay > 0)) return false;   // the husk's knock-out is the real death
      a.state = 'husk';
      a.rebornUntil = b.time + HUSK_REBIRTH;
      a.noAtk = e.profile.noAttack;
      a.max = a.max ?? e.base.maxHp;
      rebirthCleanse(b, e);
      e.profile.noAttack = true;
      e.lastAttackAt = -Infinity;                         // the snapshot shows no attack of the fallen warrior
      setHits(e, hits);
      hitCount(b, e, true);
      b.addBuff(e, { key, visible: true, persist: true, flags: { disarm: true, ...(stealthy ? { stealth: true } : {}), ...(unblock ? { unblockable: true } : {}) } });
      b.addBuff(e, { key: `${key}:reborn`, duration: HUSK_REBIRTH, flags: { invulnerable: true, untargetable: true, unblockable: true, noMove: true, noDisplace: true } });
      if (e.route) e.route.pts = null;
      setForm(b, e, 'husk', 'ember', { hits, dur: HUSK_REBIRTH + delay });
      b.after(HUSK_REBIRTH, () => { if (e.alive && a.state === 'husk') { rebirthCooldowns(e); if (onHusk) onHusk(b, e); } }, { owner: e });
      b.after(HUSK_REBIRTH + delay, () => revive(b, e, a), { owner: e });
      return true;
    },
  };
}

/**
 * 守墓石像 / 愤怒的守墓石像 (PRTS 天赋): 地面模式 — melee attacks only while blocked; the first defeat is an instant 重生
 * (statuses cleared: rebirthCleanse) to 100 % HP into 转换模式 for stone.duration s — "无法被阻挡，自缚，失衡免疫，免疫浮空。
 * 防御力增加800，法术抗性增加30", no attack [ASSUMED: PRTS lists none] — then 飞行模式, "变为飞行单位，失衡免疫": a flyer
 * no push or pull moves, whose ranged attacks (the data's 1.6 radius) deal arts damage and never target flyers; the HP is
 * not refilled again. Its pages list no 静态刚体 (data `staticBody` stays off), so the 失衡免疫 of the flight is a persistent
 * `noDisplace` buff. 浮空 is refused from the statue on (`ab.immune`; data flyers refuse it anyway). [ASSUMED] a 浮空 it
 * already carries at the knock-out runs out. fx forms 'stone' / 'fly' (its Sleep and *_2 clips, render/units.js FORMS).
 * <破碎支柱> (an event device) has no counterpart in this mode.
 */
function statue(ab) {
  const dur = T(ab, 'stone.duration') ?? 0;
  return {
    spawn(b, e) { e.profile.melee = true; },
    killed(c, b, e, a, ab2) {
      if (a.done || !(dur > 0)) return false;
      a.done = true;
      a.noAtk = e.profile.noAttack;
      rebirthCleanse(b, e);                                 // "进行重生。重生瞬间完成"
      rebirthCooldowns(e);
      e.profile.noAttack = true;
      e.hp = e.s.maxHp;
      ab2.immune = new Set([...(ab2.immune || []), 'levitate']);
      setForm(b, e, 'stone', 'stone', { dur });
      b.addBuff(e, {
        key: 'ab:stone', duration: dur, visible: true, flags: { noMove: true, unblockable: true, noDisplace: true },
        mods: { defFlat: T(ab, 'stone.def') ?? 0, resFlat: T(ab, 'stone.magic_resistance') ?? 0 },
        onExpire: ({ battle }) => {
          if (!e.alive) return;
          e.motion = 'FLY';
          Object.assign(e.profile, { noAttack: a.noAtk, melee: false, dmgType: 'arts', canTarget: (u) => !u.isFlying });
          battle.addBuff(e, { key: 'ab:flight', persist: true, flags: { noDisplace: true } });
          if (e.route) e.route.pts = null;
          setForm(battle, e, 'fly', 'revive', { kind: 'fly' });
        },
      });
      return true;
    },
  };
}

/** Bleeding on hit (逐腐兽): arts damage per second, removed by healing. */
function bleed(ab) {
  const dmg = T(ab, 'Bleeding.attack@bleeding_damage') ?? 0, dur = T(ab, 'Bleeding.attack@duration') ?? 0;
  return {
    dealt(c, b, e) {
      if (!(dmg > 0 && dur > 0)) return;
      b.addBuff(c.target, {
        key: 'ab:bleed', duration: dur, refresh: 'replace', interval: 1, visible: true,
        onTick: ({ battle, unit }) => battle.dealDamage(e, unit, { amount: dmg, type: 'arts', canDodge: false, tags: ['enemyAbility', 'bleed'] }),
      });
    },
  };
}

/**
 * 【污染秽蚀】 zone (PRTS 萨卡兹枯朽战士 / 萨卡兹枯朽战车: "范围内位于低地/高地的我方干员和召唤物每秒受到50/25点真实普通伤害
 * （可对空，无视无法选择、迷彩；同名效果不叠加）"): `low` true damage per second on low ground, `high` on high ground, to every
 * ally inside (flyers, stealthed and untargetable ones included); a unit inside several zones takes one tick per second
 * (`mem.pollutedAt`: the last tick it took).
 */
function pollution(b, src, x, y, r, life, low, high) {
  zone(b, { x, y, r, life, iv: POLLUTION_INTERVAL, kind: 'pollution', tick(units) {
    for (const u of units) {
      const v = u.ground ? low : high;
      if (!(v > 0) || b.time - (u.mem.pollutedAt ?? -Infinity) < POLLUTION_INTERVAL - 1e-6) continue;
      u.mem.pollutedAt = b.time;
      hurt(b, src, u, v, 'true', { tags: ['pollution'] });
    }
  } });
}

/** Damage zone (arts per tick). */
function dmgZone(b, src, x, y, r, life, iv, amount, type = 'arts', kind = 'zone', el = null, elAmount = 0) {
  zone(b, { x, y, r, life, iv, kind, tick(units) {
    for (const u of units) { hurt(b, src, u, amount, type); if (el && elAmount > 0) elem(b, src, u, el, elAmount); }
  } });
}

/** A cooldown skill ability (`id` labels it for tests / other abilities). */
const skill = (s, fire, { cond = null, sil = false, cd = null, icd = null, id = null } = {}) => (s || cd != null) && fire ? ({
  id: id ?? null, sil, cd: cd ?? s.cd, icd: icd ?? s.icd, cond, fire,
}) : null;

/** Blink past the blocker along the path (弑君者 / 卢西恩). Returns the start position. */
export function blinkForward(b, e, dist) {
  const from = { x: e.x, y: e.y };
  const R = e.route;
  let left = dist;
  if (R && R.pts && R.ptIdx < R.pts.length) {
    let i = R.ptIdx;
    while (left > 1e-9 && i < R.pts.length) {
      const p = R.pts[i];
      const d = Math.hypot(p.x - e.x, p.y - e.y);
      if (d <= left) { e.x = p.x; e.y = p.y; left -= d; i++; } else { stepToward(e, p.x, p.y, left); left = 0; }
    }
  } else if (R && R.legs && R.legs[R.legIdx] && R.legs[R.legIdx].r != null) {
    const L = R.legs[R.legIdx];
    stepToward(e, L.c, L.r, dist);
  }
  // never end inside a wall
  if (!b.grid.groundPassable(Math.round(e.y), Math.round(e.x)) && e.motion !== 'FLY') { e.x = from.x; e.y = from.y; return null; }
  b.addBuff(e, { key: 'ab:blink', duration: 1, flags: { invulnerable: true, unblockable: true } });
  if (R) R.pts = null;
  b.fx('blink', { x: e.x, y: e.y, id: e.id, fx: from.x, fy: from.y });
  return from;
}

// ---------------------------------------------------------------------------------------------------------------
// kits by archetype (functions reused by several keys)

const kitEp = (el, ...keys) => (ab) => [ep(el, T(ab, ...keys) ?? 0)];
const kitStealth = () => [stealth()];
const kitTimes = (artsOnly = false) => () => [times(artsOnly), unblockable()];
const kitRefraction = (ab) => [refraction(T(ab, 'refracting.magic_resistance', 'Refracting.magic_resistance') ?? 0)];
const kitPrisoner = (freeAll = false) => (ab) => [prisoner(ab, { freeAll })];
const kitDeathSpawn = (extra = []) => (ab) => [deathSpawn(ab.tS['DeadSpawn.enemy_key'], T(ab, 'DeadSpawn.cnt') ?? 0), ...extra];
const kitStun3 = (ab) => [nthAttackStatus(nthOf(ab.sk.stuncombat), 'stun', (ab.sk.stuncombat && ab.sk.stuncombat.bb.stun) || 0, true)];
const kitSelfFear = (ab) => [selfFear(ab)];
/** 深池逐火战士 / 精锐战士 / 护卫: knock-out ⇒ 1 s 重生 ⇒ a walking, 隐匿, disarmed 余烬 / 火灰 of prop_max_hp hits for `interval` s
 *  (PRTS 深池逐火战士 天赋: "基础最大生命值临时变为5…具有特殊生命值机制，不进行攻击，获得隐匿、缴械，10s后若未被击倒则变回战士形态并恢复所有
 *  生命"); blocking it lifts the 隐匿, so its blocker (and every operator in range) can beat it. */
const kitEmber = (ab) => [husk({ hits: T(ab, 'Revive[Trigger].prop_max_hp'), delay: T(ab, 'Revive[Trigger].interval') })];
const kitPolluted = (ab) => [{
  death(c, b, e) {
    if (c.reason !== 'killed') return;
    pollution(b, e, e.x, e.y, T(ab, 'PollutedDie.projectile_range') ?? 1, T(ab, 'PollutedDie.projectile_life_time') ?? 0,
      T(ab, 'PollutedDie.polluted_damage_low') ?? 0, T(ab, 'PollutedDie.polluted_damage_high') ?? 0);
  },
}];

function kitPhalanx(ab, e) {
  const def = T(ab, 'auraDefup.def') ?? 0;
  const r = (e.def.raw && e.def.raw.stats && e.def.raw.stats.rawRangeRadius) || 1.5;
  return [...kitRefraction(ab), {
    iv: 0.5,
    tick(b, e2) {
      let n = 0;
      for (const o of b.enemiesInRadius(e2.x, e2.y, r)) if (o !== e2 && o.defId === e2.defId) n++;
      if (n > 0) auraBuff(b, e2, 'ab:phalanx', 0.5, { defFlat: def * n });
    },
  }];
}

function kitBlades(ab) {
  const cnt = T(ab, 'DeadSpawn.cnt') ?? 0, add = T(ab, 'DeadSpawn.cnt_add') ?? 0, atk = T(ab, 'Atkup.atk', 'AtkUp.atk') ?? 0;
  const key = ab.tS['DeadSpawn.enemy_key'];
  return [{
    spawn(b, e, a) { a.used = 0; },
    attack(c, b, e, a) {
      if (a.used >= cnt) return;
      a.used++;
      b.addBuff(e, { key: 'ab:blade', refresh: 'stack', stacks: 1, maxStacks: Math.max(1, cnt), mods: { atkPct: atk }, persist: true, visible: true });
    },
    death(c, b, e, a) { if (c.reason === 'killed' && key) spawnChildren(b, e, key, Math.max(1, cnt + add * a.used)); },
  }];
}

function kitDeepsea(ab, { swim = false, drown = false }) {
  return [{
    iv: 0.25,
    spawn(b, e) { if (swim) e.mem.immuneDrown = true; },
    tick(b, e, a, dt) {
      const wet = onTerrain(b, e, 'deepsea');
      if (swim) {
        if (wet && !a.wet) b.addBuff(e, { key: 'ab:swim', mods: { atkPct: T(ab, 'Swim.atk') ?? 0 }, flags: { stealth: true }, visible: true });
        if (!wet && a.wet) b.removeBuff(e, 'ab:swim');
        if (wet) b.removeBuff(e, 'terrain:deepsea');   // 免疫水蚀: drop devices.js' deep-water debuff
      }
      // PRTS 码头水手 "水蚀状态下或处于清澈水域时，每秒受到1000点无来源真实伤害" (伤害分类: 深水区/涨潮水蚀 is BUFF damage):
      // damage, not a 流失 — 脆弱 scales it (player report D1 audit)
      if (drown && wet) { const v = T(ab, 'Drown.damage') ?? 0; if (v > 0) b.dealDamage(null, e, { ...periodicDamage(v * dt), tags: ['dot', 'periodic', 'drown'] }); }
      a.wet = wet;
    },
    hitIn(c, b, e, a) { if (swim && a.wet && c.dmg.tags && c.dmg.tags.some((t) => t === 'terrain' || t === 'deepsea' || t === 'drown')) c.dmg.cancel = true; },
  }];
}

/** 源石污染区 (act1 m04 infection tiles). */
function infectionArts() {
  return { hitOut(c, b, e) { if (c.dmg.isAttack && onTerrain(b, e, 'infection')) c.dmg.type = 'arts'; } };
}

function kitChimera(ab) {
  const dmg = T(ab, 'OrigAura.damage') ?? 0, spr = T(ab, 'OrigAura.sp_recover_ratio') ?? 0;
  const activate = (b, e, a) => {
    if (a.on || !onTerrain(b, e, 'infection')) return;
    a.on = true;
    e.mem.ab.atkType = 'arts';
    b.fx('telegraph', { x: e.x, y: e.y, r: CHIMERA_AURA_RADIUS, kind: 'chimera', id: e.id });
  };
  return [{
    hitOut(c, b, e, a) { if (c.dmg.isAttack && !a.on) { activate(b, e, a); if (a.on) c.dmg.type = 'arts'; } },
    iv: 0.25,
    tick(b, e, a) {
      activate(b, e, a);
      if (!a.on) return;
      a.acc = (a.acc ?? 0) + 0.25;
      const pulse = a.acc >= CHIMERA_AURA_EVERY - 1e-9;
      if (pulse) a.acc -= CHIMERA_AURA_EVERY;
      for (const u of b.alliesInRadius(e.x, e.y, CHIMERA_AURA_RADIUS)) {
        auraBuff(b, u, 'ab:originium', 0.25, { spRecoveryMul: Math.max(0, 1 + spr) }, null, true);
        // PRTS "持续视为受到源石污染区影响…每0.5秒受到50真实持续伤害": a damage instance (受击回复, the 重装 trigger), not a
        // 流失 — 无来源 like the 源石污染区 terrain it stands for [ASSUMED], the chimera keeps the credit; "同类效果取最高": one
        // tick per unit per period however many chimeras reach it (`mem.chimeraAt`; every chimera's is 50)
        if (!pulse || !(dmg > 0) || b.time - (u.mem.chimeraAt ?? -Infinity) < CHIMERA_AURA_EVERY - 1e-6) continue;
        u.mem.chimeraAt = b.time;
        b.dealDamage(e, u, { ...periodicDamage(dmg), tags: ['dot', 'pollution'] });
      }
    },
  }];
}

function kitNazg(ab, e) {
  const r = (e.def.raw && e.def.raw.stats && e.def.raw.stats.rawRangeRadius) || e.base.rangeRadius || 1.3;
  return [{
    before(c, b, e2) {
      const l = targetsNear(b, e2, r);
      if (onTerrain(b, e2, 'infection')) for (const u of b.allies()) if (!l.includes(u) && onTerrain(b, u, 'infection') && canTargetAlly(e2, u, true)) l.push(u);
      if (l.length) c.targets = byPriority(e2, l);
    },
  }];
}

function kitTidmag(ab) {
  return [ep('erosion', T(ab, 'EpDamage.attack@ep_damage_ratio') ?? 0), {
    before(c, b, e) {
      const t0 = c.targets[0];
      if (!t0) return;
      const l = c.targets.slice();
      for (const u of alliesInTiles(b, t0.tileR, t0.tileC, 'plus', 1)) if (!l.includes(u)) l.push(u);
      c.targets = l;
    },
  }];
}

function kitDsubrl(ab, e) {
  return [hitAllInRadius(e.base.rangeRadius || 1.6), ep('neural', T(ab, 'EpDamage.ep_damage_ratio') ?? 0), resist(['sluggish'])];
}

/** 掠海漂移体 爬行模式: the stun it takes on dropping (PRTS "进入爬行模式并晕眩0.5秒"; not in its blackboard). */
const SYUFO_CRAWL_STUN = 0.5;
/** 吉兆飞鳞 【失温坠落】: the stun when a freeze ends (PRTS "冻结结束时，获得0.05秒晕眩"). */
const PARROT_CHILL_STUN = 0.05;

/**
 * 掠海漂移体 (PRTS): 初始模式 近地悬浮 + 失衡免疫, 不会攻击飞行单位; 受晕眩/无法行动/沉睡/冻结/缚地影响后进入爬行模式 for
 * good and is stunned 0.5 s — a ground unit (blockable, melee operators hit it) that "仅进行阻挡攻击" (only its blocker).
 * The engine has 晕眩 / 冻结 / 沉睡 (no operator here applies 无法行动 or 缚地). Erosion on every attack.
 */
function kitSyufo(ab) {
  return [float(), ep('erosion', T(ab, 'EpDamage.attack@ep_damage_ratio') ?? 0), {
    spawn(b, e) { e.profile.canTarget = (u) => !u.isFlying; },
    status(c, b, e, a) {
      if (a.crawl || !(c.status === 'stun' || c.status === 'freeze' || c.status === 'sleep')) return;
      a.crawl = true;
      setFloat(b, e, false);
      e.profile.melee = true;
      b.applyStatus(e, 'stun', { duration: SYUFO_CRAWL_STUN, source: null });
      setForm(b, e, 'crawl');
    },
  }];
}

/**
 * 吉兆飞鳞 (PRTS): 近地悬浮 (失衡免疫), no normal attack; 受晕眩/无法行动/沉睡/缚地影响后进入晕眩模式 — the float is off, it
 * cannot be blocked and is stunned `Stun.duration` (8) s — and floats again once none of those effects holds it
 * (初始模式); 冻结 grounds it only when the freeze ends (【失温坠落】: 0.05 s stun). 首次受到伤害后 its speed is ×
 * `M0SpeedUp.move_speed` for `M0SpeedUp.duration` s ("最终提升至300%"; never in 晕眩模式, dropped when its mode
 * changes). 搬运模式 (carrying a 寻险水手) needs a level checkpoint (`ThrowEnemy.checkpoint` 0 = never) — not in this mode.
 */
function kitParrot(ab) {
  const down = T(ab, 'Stun.duration') ?? 0;
  return [float(), {
    taken(c, b, e, a) {
      if (a.ran || a.down) return;
      a.ran = true;
      b.addBuff(e, { key: 'ab:parrotRun', duration: T(ab, 'M0SpeedUp.duration') ?? 0, mods: { moveMul: T(ab, 'M0SpeedUp.move_speed') ?? 1 } });
    },
    status(c, b, e, a) {
      if (c.status === 'freeze') { a.chill = true; return; }
      if (a.down || !(c.status === 'stun' || c.status === 'sleep')) return;
      a.down = true;
      setFloat(b, e, false);
      b.removeBuff(e, 'ab:parrotRun');
      b.addBuff(e, { key: 'ab:parrotDown', flags: { unblockable: true }, persist: true });
      if (down > 0) b.applyStatus(e, 'stun', { duration: down, source: null });
      b.fx('phase', { x: e.x, y: e.y, id: e.id, kind: 'grounded' });
    },
    tick(b, e, a) {
      if (a.chill && !e.s.flags.freeze) { a.chill = false; b.applyStatus(e, 'stun', { duration: PARROT_CHILL_STUN, source: null }); }
      // "离开上述异常效果影响后进入初始模式": s.flags.stun also holds while asleep / frozen (units.js), so a sleep that
      // outlasts the mode stun keeps it down
      if (a.down && !e.s.flags.stun) {
        a.down = false;
        b.removeBuff(e, 'ab:parrotDown');
        b.removeBuff(e, 'ab:parrotRun');
        setFloat(b, e, true);
        b.fx('phase', { x: e.x, y: e.y, id: e.id, kind: 'float' });
      }
    },
  }];
}

/**
 * 萨卡兹枯朽战车 / 尖端 (PRTS; enemy_database spData "初始技力 2 / 技力上限 2 / 攻击回复"): an attack made with full SP is the
 * skill 秽蚀轰击 — "对目标造成100%物理普通伤害，同时在目标位置生成半径1.7，持续10s的【污染秽蚀】" — and empties the SP; every
 * other attack gains 1. Initial SP = max, so the FIRST attack is the skill, then every 3rd (attacks 1, 4, 7 …). Talent:
 * "普通攻击只攻击位于低地的我方单位，且不会攻击飞行单位" (a candidate filter, ai.js enemyAttack: a FLY ally such as the 炎佑 dragon on a
 * low tile is no target either); "被阻挡时进行近战攻击，造成攻击力200%的伤害" — normal attacks on its blocker ×chuang_atk_scale.
 * [ASSUMED] the skill also fires on its blocker and deals the skill's own 100 % there (PRTS names no blocked exception:
 * enemy SP skills fire as soon as they are ready and its condition — a low-ground non-flying ally within 2.2 — holds for
 * the blocker), so a blocked tank hits 100 / 200 / 200 % … (v2.4.1: 200 % on every attack, the skill included).
 * Reach: the 2.2 range circle takes an ally whose 0.25 collider touches it (ai.js enemyAttack, constants.js
 * ALLY_COLLIDER_RADIUS; PRTS 作战机制 §碰撞体积) — 2.45 from the ally's centre, 21 tiles around it instead of 13 (user
 * playtest #6 follow-up: the user remembers a long-reaching, hard-hitting ranged attack; the data scale stays 100 %).
 */
function kitTank(ab, e) {
  const melee = T(ab, 'Empty.attack@chuang_atk_scale') ?? 1;
  const sk = ab.sk.PollutedRangedAtk || null;
  const s = sk ? sk.bb : {};
  const spd = (e.def.raw && e.def.raw.sp) || null;
  const max = Math.max(1, num(spd && spd.maxSp, 0) || (sk && sk.sp) || (T(ab, 'Empty.sp') ?? 2));
  const init = Math.min(max, Math.max(0, num(spd && spd.initSp, 0)));
  return [{
    spawn(b, e2, a) { a.sp = init; a.skill = false; e2.profile.canTarget = (u) => !!u.ground && !u.isFlying; },
    // SP full: this attack is 秽蚀轰击 (a blocked hit lands at once, inside this attack, while `a.skill` is set)
    before(c, b, e2, a) { a.skill = a.sp >= max; },
    hitOut(c, b, e2, a) { if (c.dmg.isAttack && !a.skill && c.target === e2.blockedBy) c.dmg.amount *= melee; },
    attack(c, b, e2, a) {
      if (!a.skill) { a.sp = Math.min(max, a.sp + 1); return; }
      a.skill = false;
      a.sp = 0;
      const t = c.targets[0];
      if (t) pollution(b, e2, t.x, t.y, TANK_ZONE_RADIUS, s.projectile_life_time ?? 0, s.polluted_damage_low ?? 0, s.polluted_damage_high ?? 0);
    },
  }];
}

function kitDeathEye(ab, e) {
  const s = ab.sk.DeathEye;
  const r = e.base.rangeRadius || 2.5;
  return [ep('apoptosis', T(ab, 'empty.attack@ep_damage_ratio') ?? 0), skill(s, (b, e2, a) => {
    const t = byPriority(e2, targetsNear(b, e2, r))[0];
    if (!t) return;
    const dur = s.bb.hit_duration ?? 0;
    b.addBuff(e2, { key: 'ab:channel', duration: dur, flags: { disarm: true } });
    b.fx('beam', { x: e2.x, y: e2.y, from: e2.id, to: t.id, kind: 'deathEye', dur });
    let n = 0;
    const h = b.every(1, () => {
      if (!e2.alive) { h.cancel(); return; }
      // a stun / silence (SILENCE-flagged ability) or the locked target's fall interrupts the channel: no burst
      if (e2.s.flags.stun || e2.s.flags.silence || !t.alive) { h.cancel(); b.removeBuff(e2, 'ab:channel'); b.fx('beam', { x: e2.x, y: e2.y, from: e2.id, to: t.id, kind: 'deathEyeEnd' }); return; }
      hurt(b, e2, t, e2.s.atk * (s.bb.atk_scale ?? 0), 'arts');
      if (++n >= dur) {
        h.cancel();
        b.fx('explode', { x: t.x, y: t.y, r: 1, kind: 'apoptosis' });
        for (const u of b.alliesInRadius(t.x, t.y, 1)) elem(b, e2, u, 'apoptosis', e2.s.atk * (s.bb.ep_damage_ratio ?? 0));
      }
    }, { owner: e2 });
  }, { sil: true, cond: (b, e2) => targetsNear(b, e2, r).length > 0 })];
}

function kitInvisShield(ab, e) {
  const s = ab.sk.InvisibleShield;
  const r = (e.def.raw && e.def.raw.stats && e.def.raw.stats.rawRangeRadius) || 2;
  return [...kitDeathSpawn()(ab), skill(s, (b, e2) => {
    const dur = s.bb.duration ?? T(ab, 'InvisibleShield.duration') ?? 0;
    b.fx('telegraph', { x: e2.x, y: e2.y, r, kind: 'invisShield', id: e2.id });
    for (const o of b.enemiesInRadius(e2.x, e2.y, r)) if (o !== e2 && dur > 0) b.addBuff(o, { key: 'ab:veiled', duration: dur, flags: { stealth: true }, visible: true });
  })];
}

function kitCrossbow(ab) {
  const s = ab.sk.CrossAttack;
  const aligned = (b, e) => b.allies().filter((u) => canTargetAlly(e, u, true) && (Math.abs(u.y - e.y) < 0.5 || Math.abs(u.x - e.x) < 0.5) && Math.hypot(u.x - e.x, u.y - e.y) <= CROSS_REACH);
  return [stealth(), skill(s, (b, e) => {
    const t = aligned(b, e).sort((p, q) => Math.hypot(p.x - e.x, p.y - e.y) - Math.hypot(q.x - e.x, q.y - e.y))[0];
    if (!t) return;
    const bb = s.bb;
    if (bb.duration > 0) b.addBuff(e, { key: 'ab:revealed', duration: bb.duration, flags: { reveal: true } });
    b.addProjectile({ from: e, target: t, speed: 12, visual: 'enemy', source: e, onHit: (c) => {
      if (!c.target || !c.target.alive) return;
      hurt(b, e, c.target, e.s.atk * (bb.atk_scale ?? 1), 'arts');
      if (bb.stun > 0 && c.target.alive) b.applyStatus(c.target, 'stun', { duration: bb.stun, source: e });
    } });
  }, { sil: true, cond: (b, e) => aligned(b, e).length > 0 })];
}

function kitShadowKiller(ab) {
  const scale = (ab.sk.InvisibleCombat && ab.sk.InvisibleCombat.bb.atk_scale) || 1;
  return [stealth(), {
    blocked(c, b, e, a) { a.power = true; },                      // 隐匿效果失效 (blocked) → next attack ×scale
    hitOut(c, b, e, a) { if (a.power && c.dmg.isAttack) c.dmg.amount *= scale; },
    attack(c, b, e, a) { a.power = false; },
  }];
}

function kitJazz(ab, e) {
  const s = ab.sk.fire;
  const r = (e.def.raw && e.def.raw.stats && e.def.raw.stats.rawRangeRadius) || 2.5;
  const revealed = (u) => !!(u.blockedBy || u.s.flags.reveal);
  return [stealth(), {
    spawn(b, e2) { e2.profile.noAttack = true; },
    tick(b, e2) { e2.profile.noAttack = !revealed(e2); },      // 平时不攻击，失去隐匿时反击
  }, s ? {
    // 狂欢式演奏 (PRTS 节日爵士乐手, 反击模式): "仅攻击范围内存在我方单位时可触发：锁定目标持续施法，最多持续10.6s，每0.5s对目标
    // 造成攻击力20%的法术伤害和攻击力10%的灼燃损伤 ※施法期间受到沉默影响后，立即结束技能" — ONE locked target (its own
    // priority: the blocker first), floor(10.6 / 0.5) = 21 ticks at 0.5 … 10.5 s. The channel also ends when that target
    // is gone, makes no normal attacks meanwhile and is never re-cast over itself — the 10 s cooldown (enemy_database
    // skill 'fire') runs out mid-channel, the next cast waits for its end [ASSUMED "持续施法", as 死亡之眼].
    sil: true, cd: s.cd, icd: s.icd, cond: (b, e2) => revealed(e2) && !(e2.mem.jazzChannel && !e2.mem.jazzChannel.cancelled) && targetsNear(b, e2, r).length > 0,
    fire(b, e2) {
      const dur = s.bb['enemy_cnvsax[cd].duration'] ?? 0, iv = s.bb.hit_interval ?? 0.5;
      const t = byPriority(e2, targetsNear(b, e2, r))[0];
      if (!t || !(dur > 0) || !(iv > 0)) return;
      const n = Math.max(1, Math.floor(dur / iv + 1e-9));
      const buff = b.addBuff(e2, { key: 'ab:channel', duration: dur, flags: { disarm: true } });
      let k = 0;
      const end = () => { h.cancel(); e2.mem.jazzChannel = null; if (buff) b.removeBuff(e2, buff); };
      const h = b.every(iv, () => {
        if (!e2.alive || e2.s.flags.silence || !t.alive || !t.deployed) { end(); return; }
        b.fx('beam', { x: e2.x, y: e2.y, from: e2.id, to: t.id, kind: 'jazzFire' });
        hurt(b, e2, t, e2.s.atk * (s.bb.atk_scale ?? 0), 'arts');
        elem(b, e2, t, 'burn', e2.s.atk * (s.bb.ep_damage_ratio ?? 0));
        if (++k >= n) end();
      }, { owner: e2 });
      e2.mem.jazzChannel = h;
    },
  } : null];
}

function kitShadowBlade(ab) {
  const bat = ab.t['traitAbility.base_attack_time'] ?? 0;
  return [stealth(), {
    iv: 0.5,
    tick(b, e) {
      const partner = b.enemiesInRadius(e.x, e.y, 3).find((o) => /enemy_1174_duholy/.test(o.defId));
      const r = partner && partner.mem.ab ? (T(partner.mem.ab, 'traitAbility.range_radius') ?? 1.1) : 1.1;
      if (partner && Math.hypot(partner.x - e.x, partner.y - e.y) <= r + 1e-9 && e.base.bat > 0) auraBuff(b, e, 'ab:shadowSync', 0.5, { batPct: bat / e.base.bat });
    },
  }];
}

function kitHolyGuard(ab) {
  const r = T(ab, 'traitAbility.range_radius') ?? 1.1, aspd = T(ab, 'traitAbility.attack_speed') ?? 0;
  return [...kitRefraction(ab), {
    iv: 0.5,
    tick(b, e) {
      const on = b.enemiesInRadius(e.x, e.y, r).some((o) => /enemy_1175_dushdo/.test(o.defId));
      if (!on) return;
      for (const u of b.alliesInRadius(e.x, e.y, r)) auraBuff(b, u, 'ab:forceField', 0.5, { aspd }, null, true);
    },
  }];
}

function kitRush(ab) {
  const ms = T(ab, 'rush.dlancer_t[trigger].move_speed') ?? 0, iv = T(ab, 'rush.dlancer_t[trigger].interval') ?? 0.5;
  const max = T(ab, 'rush.dlancer_t[trigger].trig_cnt') ?? 0, first = T(ab, 'firstattack.atk_scale') ?? 0;
  return [{
    iv,
    spawn(b, e, a) { a.n = 0; },
    tick(b, e, a) {
      if (!e.moving || e.blockedBy || a.n >= max) return;
      a.n++;
      b.addBuff(e, { key: 'ab:rush', mods: { moveMul: 1 + ms * a.n }, persist: true });
    },
    blocked(c, b, e, a) { a.charge = a.n; },
    hitOut(c, b, e, a) {
      if (!c.dmg.isAttack || !(a.charge > 0) || !(max > 0)) return;
      c.dmg.amount *= 1 + (first / 100) * (a.charge / max); // 被阻挡后的首次攻击: extra damage from the built-up speed
    },
    attack(c, b, e, a) { if (a.charge > 0) { a.charge = 0; a.n = 0; b.removeBuff(e, 'ab:rush'); } },
  }];
}

function kitFirstAoe(ab) {
  const scale = T(ab, 'AOEAttack.atk_scale') ?? 0;
  return [blockWeight(3), {
    dealt(c, b, e, a) {
      if (a.done) return;
      a.done = true;
      b.fx('explode', { x: c.target.x, y: c.target.y, r: 1, kind: 'aoeAttack' });
      for (const u of b.alliesInRadius(c.target.x, c.target.y, 1)) if (u !== c.target) hurt(b, e, u, e.s.atk * scale, 'phys');
    },
  }];
}

function kitDefDecay(ab) {
  const max = T(ab, 'def_reduce.max_stack_cnt') ?? 0, def = T(ab, 'def_reduce.def') ?? 0, res = T(ab, 'def_reduce.magic_resistance') ?? 0;
  return [{
    taken(c, b, e) {
      if (!(max > 0)) return;
      b.addBuff(e, { key: 'ab:defDecay', refresh: 'stack', stacks: 1, maxStacks: max, persist: true, mods: { defFlat: def / max, resFlat: res / max } });
    },
  }];
}

function kitExposeOnHit(ab) {
  const dur = T(ab, 'Expose.weak[limit]') ?? 0, scale = T(ab, 'Expose.damage_scale') ?? 1;
  return [{ sil: true, taken(c, b) { const s = c.source; if (s && s.side === 'ally' && s.alive && s.kind !== 'device') expose(b, s, dur, scale); } }];
}

function kitExposeOnDeath(ab) {
  const dur = T(ab, 'Expose.weak[limit]') ?? 0, scale = T(ab, 'Expose.damage_scale') ?? 1, r = T(ab, 'Expose.range_radius') ?? 1;
  return [{ sil: true, death(c, b, e) { if (c.reason !== 'killed') return; b.fx('explode', { x: e.x, y: e.y, r, kind: 'expose' }); for (const u of b.alliesInRadius(e.x, e.y, r)) expose(b, u, dur, scale); } }];
}

/**
 * 淤困's "受到的元素损伤提高至130%" on its host: an `elementHit` multiplier (SIM.md §7.2 — every "受到的元素损伤±N%"; on an
 * operator at priority 20, before a 损伤屏障), never 元素伤害. One battle-wide handler, installed with the first host.
 */
function ensureParasiteHook(b) {
  const st = stOf(b);
  if (st.parasiteHook) return;
  st.parasiteHook = true;
  b.on('elementHit', (c) => {
    const bf = c.target && c.dmg && c.dmg.type === 'element' ? c.target.findBuff('ab:parasite') : null;
    const m = bf && bf.data ? bf.data.epMul : 1;
    if (m > 0 && m !== 1) c.dmg.mul *= m;
  }, { priority: 20 });
}

function kitParasite(ab) {
  const scale = T(ab, '1.atk_scale') ?? 0, elMul = T(ab, '1.ep_damage_scale') ?? 1;
  return [taunt(-1), {
    iv: 0.2,
    tick(b, e, a) {
      const host = e.blockedBy && e.blockedBy.alive ? e.blockedBy : null;
      if (a.host && a.host !== host) { b.removeBuff(a.host, 'ab:parasite'); a.host = null; }
      if (!host || a.host === host) return;
      a.host = host;
      ensureParasiteHook(b);
      b.fx('beam', { x: e.x, y: e.y, from: e.id, to: host.id, kind: 'parasite' });
      b.addBuff(host, {
        // "受到的元素损伤提高至130%": a 元素损伤 multiplier on the element hit (ensureParasiteHook), not 元素伤害
        key: 'ab:parasite', visible: true, interval: 1, data: { src: e, spread: PARASITE_SPREAD, epMul: elMul },
        onTick: ({ battle, unit }) => { if (e.alive) battle.dealDamage(e, unit, { amount: e.s.atk * scale, type: 'arts', canDodge: false, tags: ['enemyAbility', 'parasite'] }); },
      });
    },
    death(c, b, e, a) { if (a.host) b.removeBuff(a.host, 'ab:parasite'); },
  }];
}

function kitBoneSpike() {
  return [stealth(), {
    before(c, b, e) {
      if (e.blockedBy || e.s.flags.reveal) return;                // 隐匿状态下同时攻击数个目标
      const l = byPriority(e, targetsNear(b, e, e.base.rangeRadius));
      if (l.length) c.targets = l.slice(0, ACBUNN_TARGETS);
    },
  }];
}

/**
 * 假想敌：黑云 (PRTS): 抓取 (KillOthers, cd 10 / icd 5) "仅半径3.75范围内存在未持有【延迟吞噬】的敌方飞行普通单位时可触发：
 * 选择至多3名满足上述条件的目标，短暂延迟后对其施加4秒【延迟吞噬】：束缚，效果结束时令给予方+1SP，随后强制击杀受予方 ※技能
 * 持续4秒，期间持有束缚" (the nearest prey first [ASSUMED]); 全弹发射 (FireWeapon, cd 10 / icd 5, SP cost 1) "仅全场范围内存在
 * 我方单位时可触发：清空自身SP，进行一次多连击，每击选择全场范围内的1名随机我方单位，对其造成攻击力130%的物理伤害 ※多连击的
 * 连击次数等于本技能消耗的SP数量" — SP (技力上限 spData.maxSp 3) only comes from the grabs.
 */
function kitBlackCloud(ab, e) {
  const k = ab.sk.KillOthers, f = ab.sk.FireWeapon;
  const maxAmmo = Math.max(1, num(e.def.raw && e.def.raw.sp && e.def.raw.sp.maxSp, 3));
  const grabR = (k ? num(k.bb.range_radius, 1.5) : 1.5) * GRAB_RADIUS_SCALE;
  const dur = k ? num(k.bb.duration, 4) : 4;
  const isPrey = (b, e2, o) => o !== e2 && o.alive && !o.hidden && o.isFlying && o.def.rank === 'NORMAL' && !o.isBoss && !o.findBuff('ab:devoured');
  const prey = (b, e2) => b.enemiesInRadius(e2.x, e2.y, grabR).filter((o) => isPrey(b, e2, o));
  return [
    skill(k, (b, e2) => {
      const list = prey(b, e2).sort((p, q) => Math.hypot(p.x - e2.x, p.y - e2.y) - Math.hypot(q.x - e2.x, q.y - e2.y)).slice(0, GRAB_MAX_PREY);
      if (!list.length) return;
      b.addBuff(e2, { key: 'ab:grabbing', duration: dur, flags: { bind: true, noMove: true } });   // 技能持续4秒，期间持有束缚
      b.fx('beam', { x: e2.x, y: e2.y, from: e2.id, to: list[0].id, kind: 'devour' });
      b.after(GRAB_DELAY, () => {
        if (!e2.alive) return;
        for (const o of list) {
          if (!o.alive) continue;
          b.addBuff(o, { key: 'ab:devoured', duration: dur, visible: true, flags: { bind: true, noMove: true, disarm: true } });
          b.after(dur, () => {
            if (!o.alive || !e2.alive) return;
            e2.mem.ab.ammo = Math.min(maxAmmo, (e2.mem.ab.ammo ?? 0) + num(k.bb.sp, 1));
            b.kill(o, null);
          }, { owner: e2 });
        }
      }, { owner: e2 });
    }, { sil: true, cond: (b, e2) => prey(b, e2).length > 0 }),
    skill(f, (b, e2) => {
      const hits = Math.floor(e2.mem.ab.ammo ?? 0);
      if (!(hits > 0)) return;
      e2.mem.ab.ammo = 0;
      for (let i = 0; i < hits; i++) {
        const t = b.rng.pick(allTargets(b, e2));
        if (!t) break;
        b.fx('beam', { x: e2.x, y: e2.y, from: e2.id, to: t.id, kind: 'fireWeapon' });
        hurt(b, e2, t, e2.s.atk * num(f.bb.atk_scale, 1), 'phys');
      }
    }, { sil: true, cond: (b, e2) => (e2.mem.ab.ammo ?? 0) >= Math.max(1, num(f.sp, 1)) && allTargets(b, e2).length > 0 }),
  ];
}

/** 假想敌：再生 (PRTS 假想敌：再生 天赋) · knock-out ⇒ 1 s 重生 ⇒ 再生状态: a 傀儡 of prop_max_hp (15) hits that is 不可阻挡 for
 *  `interval` (15) s and walks on ("1s内不移动": only the 重生 stands; its model has a 傀儡 walk cycle, B_Move), back with full
 *  HP if still standing; entering it gives the other enemies within 1.8 (targetable or not) max_damage_block_cnt (5)
 *  hit shields. */
function kitRegen(ab) {
  const hits = T(ab, 'Revive[Trigger].prop_max_hp'), delay = T(ab, 'Revive[Trigger].interval'), block = T(ab, 'Aura.max_damage_block_cnt') ?? 0;
  return [husk({
    hits, delay, stealthy: false, unblock: true, key: 'ab:regen',
    onHusk(b, e) {
      // "进入此形态时，使半径1.8范围内的其他敌方单位（无视其可选性）获得5层吸收物理/法术伤害的护盾"
      b.fx('telegraph', { x: e.x, y: e.y, r: ACPUPP_AURA_RADIUS, kind: 'regenShield', id: e.id });
      for (const o of b.enemiesInRadius(e.x, e.y, ACPUPP_AURA_RADIUS)) if (o !== e && block > 0) { const oab = abOf(b, o); oab.hitShield = Math.max(oab.hitShield, block); }
    },
  })];
}

function kitSteal(ab) {
  const n = T(ab, 'DamageOrBullet.attack@minus_bullet') ?? 1;
  return [selfFear(ab), {
    // PRTS “萨科塔之眼” 天赋: "不会攻击飞行单位" (the 炎佑 dragon is one) — a candidate filter (ai.js enemyAttack): its next
    // ground target in range instead
    spawn(b, e) { e.profile.canTarget = (u) => !u.isFlying; },
    hitOut(c, b, e) {
      if (!c.dmg.isAttack) return;
      const t = c.target;
      // 攻击时尝试夺走目标1发弹药，若无法夺走弹药则造成高额物理伤害
      if (t.skill && t.skill.active && t.skill.kind === 'ammo' && t.skill.ammoLeft > 0) {
        t.skill.ammoLeft = Math.max(0, t.skill.ammoLeft - n);
        if (t.skill.ammoLeft <= 0) t.skill.end('ammo');
      } else if ((t.trait && t.trait.ammo) > 0) {
        t.trait.ammo = Math.max(0, t.trait.ammo - n);
      } else return;
      c.dmg.cancel = true;
      b.fx('steal', { x: t.x, y: t.y, id: t.id, from: e.id });
    },
  }];
}

function kitRoar(ab) {
  const s = ab.sk.Roar;
  return [selfFear(ab), skill(s, (b, e) => {
    b.fx('telegraph', { x: e.x, y: e.y, r: 99, kind: 'roar', id: e.id });
    for (const u of b.allies()) b.addBuff(u, { key: 'ab:roar', duration: s.bb.duration ?? 0, refresh: 'extend', mods: { aspd: s.bb.attack_speed ?? 0 }, visible: true });
  }, { sil: true })];
}

/**
 * 暴鸰 (PRTS): "不进行普通攻击"; 投弹 (boomb, cooldown / initCooldown 1) "仅攻击范围内存在我方单位时可触发：对目标及其周围八格
 * 的我方单位造成100%物理伤害（对主目标造成物理普通伤害，对溅射目标造成物理溅射伤害，伤害无视迷彩）技能结束后移速最终提升至200%
 * ※此技能仅能触发一次，不可沉默". The official battle prefab (enemy_1040_bombd, read from the client) drops the bomb as a
 * projectile: the cast plays the Attack clip, the bomb leaves on its OnAttack event (BOMBD_RELEASE) and flies to the
 * target (projectile_bombd), and the drone switches to its bomb-less mode (S1, buff bomb_s: the *_2 clips, no bottle).
 * User feedback after 0.1.0 (D4 "炸弹无法正常投放"): the damage used to land in the tick of the trigger while the drone
 * kept its bomb on screen. Now: the drone hovers through its cast; at the release an 'atk' event of kind 'droneBomb'
 * (the client winds the Attack clip up to it and flies the bomb) and setForm 'bombed' (fx 'phase' {kind, form: 'bombed'}
 * — render FORMS: the *_2 clips, which the view starts once the Attack clip is over — the official end clip Idle_2;
 * `e.form` → UnitInfo.form; the client keeps the fx through catch-ups, shared/protocol.js fxForm); on arrival the target (the ranged target by engine priority) takes 100 % ATK and every other ally of
 * the 8 tiles around where it lands 100 % ATK splash (camouflage ignored); a target gone mid-flight: the bomb lands
 * where it was. The cast ends once the bomb has landed, at least BOMBD_POST_DELAY after the release: move speed
 * ×boomb.move_speed, and it flies on. A stun / freeze / sleep before the release interrupts the cast (Boomb
 * `_immuneStunWhenAffecting` 0, like the other enemy channels here): nothing leaves the drone, it keeps its bomb and casts
 * again after the skill's cooldown (1 s, counted from the interrupt) once it is free and an operator is in range.
 * [ASSUMED] no drop when the drone is dead at the release; the ATK at the release; the hover through the cast (the
 * engine pauses an enemy for its attack clip, ATTACK_PAUSE; the drop is the drone's only attack-like cast); the
 * bomb-less look from the release (the bomb leaves the drone on that frame of the Attack clip; at the cast end — 1 tick
 * before the clip ends — the client would draw the bomb back for a frame); an interrupted cast does not use up the one
 * trigger (`_maxTriggerTime` 1 — the bomb is still on the drone); a stun after the release does not stop the cast end.
 */
function kitBombd(ab) {
  const s = ab.sk.boomb;
  const ms = (s && s.bb.move_speed) || 0;
  const reach = (e) => e.base.rangeRadius || 2;
  const land = (b, e, atk, t, x, y) => {
    const r = t ? t.tileR : Math.round(y), c = t ? t.tileC : Math.round(x);
    b.fx('explode', { x, y, r: BOMB_REACH + 0.5, kind: 'bomb', tiles: 'box' });
    if (t) hurt(b, e, t, atk, 'phys');
    for (const u of alliesInTiles(b, r, c, 'box', BOMB_REACH)) if (u !== t) hurt(b, e, u, atk, 'phys', { tags: ['splash'] });
  };
  // the end of the cast (bomb_s): 移速最终提升至200%; it flies on
  const finish = (b, e) => {
    if (!e.alive) return;
    e.pauseUntil = b.time;
    if (ms > 0) b.addBuff(e, { key: 'ab:bombRun', mods: { moveMul: ms }, persist: true });
  };
  // the cast before its release: { a: the skill ability, rel: the scheduled release }
  let pending = null;
  // a stun / freeze / sleep before the release: the bomb stays on; the skill re-arms with its cooldown
  const interrupt = (b, e) => {
    const { a, rel } = pending;
    pending = null;
    rel.cancel();
    e.pauseUntil = b.time;
    a.left = Math.max(TICK, num(s.cd, 1));
  };
  return [
    { spawn(b, e) { e.profile.noAttack = true; },
      tick(b, e) { if (pending && e.s.flags.stun) interrupt(b, e); } },
    skill(s, (b, e, a) => {
      const t = byPriority(e, targetsNear(b, e, reach(e)))[0];
      if (!t) return;
      a.cd = Infinity; a.left = Infinity;                               // 仅能触发一次
      e.skillAnimUntil = -1;           // the cast is drawn through its 'atk' event: the client winds the Attack clip up to it
      // hovers through the cast, until `finish` (bounded: the bomb lands within its projectile's maxAge, 10 s)
      e.pauseUntil = Math.max(e.pauseUntil, b.time + BOMBD_RELEASE + 10 + BOMBD_POST_DELAY);
      let landed = false, waited = false;
      const done = () => { if (landed && waited) finish(b, e); };
      pending = { a, rel: null };
      pending.rel = b.after(BOMBD_RELEASE, () => {
        if (pending && e.alive && e.s.flags.stun) { interrupt(b, e); return; }  // stunned after this tick's ability pass
        pending = null;
        if (!e.alive) return;
        const atk = e.s.atk;
        b._ev(['atk', e.id, t.id, 'droneBomb']);
        setForm(b, e, 'bombed');                           // UnitInfo.form: a view built later draws it bomb-less
        b.addProjectile({ from: e, target: t, speed: PROJECTILE_SPEEDS.droneBomb, visual: 'droneBomb', source: e, hitDead: true,
          onHit: (c) => { land(b, e, atk, c.target, c.x, c.y); landed = true; done(); } });
        b.after(BOMBD_POST_DELAY, () => { waited = true; done(); }, { owner: e });
      }, { owner: e });
    }, { cond: (b, e) => targetsNear(b, e, reach(e)).length > 0 }),
  ];
}

/**
 * 帝国炮火先兆者 / 中枢先兆者 (PRTS): every normal attack fires a shell at the target's position that lands SHELL_FLIGHT s
 * later and deals 100 % of the ATK at launch as physical damage without a source to every ally within SHELL_RADIUS
 * (it may miss the target that moved away; camouflage does not matter). The attack itself is the engine's (cooldown,
 * pause, 'atk' event of kind 'mortar'); the damage is the shell's (ai.js `profile.deferHit`).
 */
function kitShell() {
  return [{
    spawn(b, e) { e.profile.deferHit = true; e.profile.shot = 'mortar'; },
    attack(c, b, e) {
      const atk = e.s.atk * (e.profile.atkScale ?? 1);
      for (const t of c.targets) {
        const x = t.x, y = t.y;
        b.fx('bombardShell', { x, y, id: e.id, r: SHELL_RADIUS, t: SHELL_FLIGHT });
        b.after(SHELL_FLIGHT, () => {
          b.fx('bombard', { x, y, r: SHELL_RADIUS, kind: 'emppnt' });
          for (const u of b.alliesInRadius(x, y, SHELL_RADIUS)) hurt(b, null, u, atk, 'phys', { isSkill: false, tags: ['shell'] });
        });
      }
    },
  }];
}

function kitIgnitable(ab) {
  return [deathBoom({ scale: T(ab, 'boom.atk_scale') ?? 0, type: 'arts', cond: (e) => !!e.mem.ab.ignited, sil: true })];
}

function kitFlameVine(ab) {
  const add = T(ab, 'pow.add_max_atk') ?? 0, time = T(ab, 'pow.time') ?? 0;
  const first = T(ab, 'pow.attack@ep_damage_ratio') ?? 0, normal = T(ab, 'pow.attack@ep_damage_ratio_normal') ?? 0;
  return [{
    iv: 0.5,
    spawn(b, e, a) { a.t0 = b.time; a.first = true; },
    tick(b, e, a) {
      if (!a.first || !(time > 0)) return;
      const k = Math.min(1, (b.time - a.t0) / time);
      b.addBuff(e, { key: 'ab:pow', mods: { atkPct: add * k }, persist: true });
    },
    dealt(c, b, e, a) {
      const t = c.target;
      if (a.first) {
        // 首次攻击 (PRTS 灼藤): every other ally of the target's 3×3 (range x-4, tile test) takes 100 % ATK arts splash and
        // everyone there 25 % ATK burn; then the ATK ramp ends and later attacks add 20 %
        a.first = false;
        b.fx('explode', { x: t.x, y: t.y, r: 1.5, kind: 'flameVine' });
        for (const u of alliesInTiles(b, t.tileR, t.tileC, 'box', 1)) { if (u !== t) hurt(b, e, u, e.s.atk, 'arts'); elem(b, e, u, 'burn', e.s.atk * first); }
        b.removeBuff(e, 'ab:pow');
      } else elem(b, e, t, 'burn', e.s.atk * normal);
    },
    attack(c, b, e) {
      // ignites nearby 卷心籽
      for (const o of b.enemiesInRadius(e.x, e.y, 1.5)) if (o.defId === 'enemy_10065_ftzlc' && o.mem.ab && !o.mem.ab.ignited) { o.mem.ab.ignited = true; b.fx('ignite', { x: o.x, y: o.y, id: o.id }); }
    },
  }];
}

function kitDekght(ab) {
  const rage = { atkPct: T(ab, 'triggerrage.atk') ?? 0, aspd: T(ab, 'triggerrage.attack_speed') ?? 0, moveMul: 1 + (T(ab, 'triggerrage.move_speed') ?? 0) };
  const partnerRage = {
    otherDeath(c, b, e, a) {
      const u = c.unit;
      if (a.raged || !u || u === e || !/enemy_1513_dekght/.test(u.defId || '')) return;
      a.raged = true;
      b.addBuff(e, { key: 'ab:rage', mods: rage, persist: true, visible: true });
    },
    spawn(b, e) { watchDeaths(b, e); },
  };
  return partnerRage;
}

function kitTeapot(ab) {
  return kitDeathSpawn([{
    sil: true,
    death(c, b, e) {
      if (c.reason !== 'killed') return;
      const aspd = T(ab, 'DeadBoom.attack_speed') ?? 0, dur = T(ab, 'DeadBoom.duration') ?? 0, iv = T(ab, 'DeadBoom.interval') ?? 1;
      const r = e.base.rangeRadius || 2, atk = e.s.atk, x = e.x, y = e.y;
      // 被击倒后爆炸造成范围法术伤害 (one blast of ATK ×1 [ASSUMED scale]) …
      b.fx('explode', { x, y, r, kind: 'teaBoom', id: e.id });
      for (const u of b.alliesInRadius(x, y, r)) hurt(b, null, u, atk, 'arts');
      // … 使我方攻击速度大幅降低（可被抵抗）: the steam lingers `duration` s; allies inside keep the ASPD cut (re-applied
      // every `interval` s)
      const slow = (units) => { for (const u of units) b.addBuff(u, { key: 'ab:teaBoom', duration: iv + 0.1, refresh: 'extend', mods: { aspd }, visible: true }); };
      slow(b.alliesInRadius(x, y, r));
      if (dur > 0) zone(b, { x, y, r, life: dur, iv, kind: 'teaSteam', tick: slow });
    },
  }])(ab);
}

function kitNucleus(ab) {
  return [{
    taken(c, b, e, a) { if (a.on) return; a.on = true; b.addBuff(e, { key: 'ab:combat', persist: true, visible: true, mods: { moveMul: T(ab, '0.move_speed') ?? 1 } }); },
    iv: T(ab, '1.interval') ?? 1,
    tick(b, e, a) { if (!a.on) return; for (const u of b.alliesInRadius(e.x, e.y, T(ab, '1.range_radius') ?? 0)) elem(b, e, u, 'neural', e.s.atk * (T(ab, '1.ep_damage_ratio') ?? 0)); },
  }];
}

function kitLeaderMisc(key, ab, e) {
  switch (key) {
    case 'enemy_1050_lslime': {
      const dot = { dmg: T(ab, 'dot.damage') ?? 0, iv: T(ab, 'dot.interval') ?? 1, dur: T(ab, 'dot.duration') ?? 0 };
      return [maxTargets(4), lowHpBuff(T(ab, 'selfbuff.hp_ratio') ?? 0.5, { aspd: T(ab, 'selfbuff.attack_speed') ?? 0 }), {
        dealt(c, b, e2) {
          if (!(dot.dur > 0)) return;
          b.addBuff(c.target, { key: 'ab:burnDot', duration: dot.dur, refresh: 'replace', interval: dot.iv, visible: true,
            onTick: ({ battle, unit }) => battle.dealDamage(e2, unit, { amount: dot.dmg, type: 'arts', canDodge: false, tags: ['enemyAbility'] }) });
        },
      }, {
        iv: T(ab, 'rangedamage.interval') ?? 10,
        tick(b, e2) {
          if (!e2.blockedBy) return; // 被阻挡时会进行自爆造成高额伤害
          b.fx('explode', { x: e2.x, y: e2.y, r: 1, kind: 'selfBlast' });
          for (const u of b.alliesInRadius(e2.x, e2.y, 1)) hurt(b, e2, u, T(ab, 'rangedamage.attack@damage') ?? 0, 'arts');
        },
      }];
    }
    case 'enemy_1500_skulsr':
      return [lowHpBuff(T(ab, 'atkup.hp_ratio') ?? 0.5, { atkPct: T(ab, 'atkup.atk') ?? 0 }), {
        dealt(c, b, e2) {
          if (e2.blockedBy) return; // 未被阻挡时会发射榴弹
          for (const u of b.alliesInRadius(c.target.x, c.target.y, 1)) {
            if (u !== c.target) hurt(b, e2, u, e2.s.atk, 'phys');
            b.applyStatus(u, 'defDown', { duration: SKULSR_DEFDOWN_DUR, source: e2, value: -(T(ab, 'defdown.def') ?? 0) });
          }
        },
      }];
    case 'enemy_1502_crowns': {
      const s = ab.sk.blink;
      return [skill(s, (b, e2) => blinkForward(b, e2, s.bb.dist ?? 1.5), { sil: true, cond: (b, e2) => !!e2.blockedBy })];
    }
    case 'enemy_1504_cqbw': {
      const s = ab.sk.C4;
      return [skill(s, (b, e2) => {
        const l = byPriority(e2, targetsNear(b, e2, s.bb.range_radius ?? e2.base.rangeRadius));
        const n = e2.hpRatio < 0.5 ? 2 : 1; // 生命值降至一半以下时炸药包的使用数量增加
        for (const t of l.slice(0, n)) {
          const x = t.x, y = t.y;
          b.fx('telegraph', { x, y, r: C4_RADIUS, dur: C4_FUSE, kind: 'c4' });
          b.after(C4_FUSE, () => { b.fx('explode', { x, y, r: C4_RADIUS, kind: 'c4' }); for (const u of b.alliesInRadius(x, y, C4_RADIUS)) hurt(b, e2, u, e2.s.atk * (s.bb.atk_scale ?? 1), 'phys'); });
        }
      }, { cond: (b, e2) => targetsNear(b, e2, s.bb.range_radius ?? e2.base.rangeRadius).length > 0 })];
    }
    case 'enemy_1509_mousek': {
      // 出场时拥有能够吸收大量法术伤害的屏障，屏障存在时防御力大幅增加 (arts-only barrier + DEF while it holds)
      const bar = artsBarrier(T(ab, 'shield.dynamic') ?? 0, { key: 'ab:sandDef', whileUp: { defFlat: T(ab, 'defup.def') ?? 0 } });
      const ds = ab.sk.DriftSand, ss = ab.sk.SandStorm;
      return [bar, lowHpBuff(T(ab, 'enrage.hp_ratio') ?? 0.5, { dmgDealtMul: T(ab, 'enrage.damage_scale') ?? 1 }),
        // 【唱沙】 the highest-max-HP unit on the field and everything in its cross: physical `damage`
        skill(ds, (b, e2) => {
          const t = allTargets(b, e2).sort((p, q) => q.s.maxHp - p.s.maxHp || aggroCmp(p, q))[0];
          if (!t) return;
          b.fx('telegraph', { x: t.tileC, y: t.tileR, r: DRIFT_REACH, kind: 'driftSand', tiles: 'plus', id: e2.id });
          for (const u of alliesInTiles(b, t.tileR, t.tileC, 'plus', DRIFT_REACH)) hurt(b, e2, u, ds.bb.damage ?? 0, 'phys');
        }, { cond: (b, e2) => allTargets(b, e2).length > 0 }),
        // 【沙狱】 the lowest-max-HP unit and those around it: ATK −`atk` and `damage` arts per second for `duration` s
        skill(ss, (b, e2) => {
          const t = allTargets(b, e2).sort((p, q) => p.s.maxHp - q.s.maxHp || aggroCmp(p, q))[0];
          if (!t) return;
          const dur = ss.bb.duration ?? 0, x = t.x, y = t.y;
          b.fx('zone', { x, y, r: SANDSTORM_RADIUS, dur, kind: 'sandStorm', id: e2.id });
          for (const u of b.alliesInRadius(x, y, SANDSTORM_RADIUS)) {
            b.addBuff(u, { key: 'ab:sandStorm', duration: dur, refresh: 'replace', interval: 1, visible: true, mods: { atkPct: ss.bb.atk ?? 0 },
              onTick: ({ battle, unit }) => battle.dealDamage(e2, unit, { amount: ss.bb.damage ?? 0, type: 'arts', canDodge: false, tags: ['enemyAbility', 'sandStorm'] }) });
          }
        }, { cond: (b, e2) => allTargets(b, e2).length > 0 }),
      ];
    }
    case 'enemy_1511_mdrock': {
      // 拥有屏障吸收法术伤害，屏障存在时大幅提升生命上限与攻击速度; 周期性刷新屏障
      const s = ab.sk.RefreshShield;
      const bar = artsBarrier(s ? s.bb.dynamic ?? 0 : T(ab, 'shield.dynamic') ?? 0, { key: 'ab:rockPower',
        whileUp: { hpPct: (s ? s.bb.max_hp : null) ?? T(ab, 'shield.max_hp') ?? 0, aspd: (s ? s.bb.attack_speed : null) ?? T(ab, 'shield.attack_speed') ?? 0 } });
      return [bar, {
        // 攻击时攻击力永久提升，最多六层 (the blackboard ATK is the 6-stack total [ASSUMED split])
        attack(c, b, e2) { b.addBuff(e2, { key: 'ab:rockCharge', refresh: 'stack', stacks: 1, maxStacks: 6, persist: true, mods: { atkPct: (T(ab, 'charge.attack@enemy_mdrock_s_1[charge].atk') ?? 0) / 6 } }); },
      }, skill(s, (b, e2) => bar.refresh(b, e2, bar))];
    }
    case 'enemy_1513_dekght': {
      // 攻击时使目标与周围四格的单位受到物理伤害; 【蓄力攻击】 charge `duration` s, then ATK×atk_scale on the target's cross
      const s = ab.sk.ChargeAttack;
      return [kitDekght(ab), { before(c, b, e2) { const t = c.targets[0]; if (t) for (const u of alliesInTiles(b, t.tileR, t.tileC, 'plus', 1)) if (!c.targets.includes(u)) c.targets.push(u); } },
        skill(s, (b, e2) => {
          const t = e2.blockedBy;
          const dur = s.bb.duration ?? 0, r = t.tileR, cc = t.tileC;
          b.addBuff(e2, { key: 'ab:charging', duration: dur, visible: true, flags: { disarm: true } });
          b.fx('telegraph', { x: cc, y: r, r: 1, dur, kind: 'chargeAttack', tiles: 'plus', id: e2.id });
          b.after(dur, () => {
            if (!e2.alive || e2.s.flags.stun) return;
            b.fx('explode', { x: cc, y: r, r: 1, kind: 'chargeAttack', tiles: 'plus' });
            for (const u of alliesInTiles(b, r, cc, 'plus', 1)) hurt(b, e2, u, e2.s.atk * (s.bb['dekght[aoe].atk_scale'] ?? s.bb.atk_scale ?? 1), 'phys');
          }, { owner: e2 });
        }, { cond: (b, e2) => !!(e2.blockedBy && e2.blockedBy.alive) })];
    }
    case 'enemy_1513_dekght_2': {
      // 同时攻击两名目标; 爆炸箭: three targets, after `interval` s ATK×atk_scale arts on each target's cross
      const s = ab.sk.TripleAttack;
      const cands = (b, e2) => byPriority(e2, targetsNear(b, e2, e2.base.rangeRadius || 2.5));
      return [kitDekght(ab), maxTargets(2), skill(s, (b, e2) => {
        const delay = s.bb['dekght_2[aoe].interval'] ?? 0, scale = s.bb['dekght_2[aoe].atk_scale'] ?? 1;
        for (const t of cands(b, e2).slice(0, 3)) {
          const r = t.tileR, cc = t.tileC;
          b.fx('telegraph', { x: cc, y: r, r: 1, dur: delay, kind: 'blastArrow', tiles: 'plus', id: e2.id });
          b.after(delay, () => {
            if (!e2.alive) return;
            b.fx('explode', { x: cc, y: r, r: 1, kind: 'blastArrow', tiles: 'plus' });
            for (const u of alliesInTiles(b, r, cc, 'plus', 1)) hurt(b, e2, u, e2.s.atk * scale, 'arts');
          }, { owner: e2 });
        }
      }, { cond: (b, e2) => cands(b, e2).length > 0 })];
    }
    case 'enemy_1539_reid': {
      // 生命值降至一半以下时攻击力大幅度提升; 首次被击倒后重生 (Reborn.duration s), 恢复一半生命值;
      // 【冲锋】 a unit within range_radius ahead ⇒ move speed ×(1+move_speed) for `duration` s
      const rush = ab.sk.Rush;
      const prey = (b, e2) => targetsNear(b, e2, rush.bb.range_radius ?? 1.5, { ranged: false }).filter((u) => u.ground);
      return [lowHpBuff(T(ab, 'atkup.hp_ratio') ?? 0.5, { atkPct: T(ab, 'AtkUp.atk', 'atkup.atk') ?? 0 }),
        reborn({ dur: T(ab, 'Reborn.duration') ?? 0, hpRatio: T(ab, 'Reborn.hp_ratio') ?? 0.5, invincible: T(ab, 'Reborn.invincible') ?? 0 }),
        skill(rush, (b, e2) => {
          b.addBuff(e2, { key: 'ab:rush', duration: rush.bb.duration ?? 0, refresh: 'replace', visible: true, mods: { moveMul: 1 + (rush.bb.move_speed ?? 0) } });
          b.fx('charge', { x: e2.x, y: e2.y, id: e2.id, kind: 'avengerRush' });
        }, { cond: (b, e2) => !e2.blockedBy && prey(b, e2).length > 0 })];
    }
    case 'enemy_2003_rockman': {
      const s = ab.sk.StunAttack;
      const cands = (b, e2) => targetsNear(b, e2, (e2.def.raw.stats && e2.def.raw.stats.rawRangeRadius) || 2.5).filter((u) => !u.s.flags.stun);
      return [skill(s, (b, e2) => {
        const t = byPriority(e2, cands(b, e2))[0];
        if (!t) return;
        b.addProjectile({ from: e2, target: t, speed: 8, visual: 'lob', source: e2, onHit: (c) => {
          if (!c.target || !c.target.alive) return;
          hurt(b, e2, c.target, e2.s.atk * (s.bb.atk_scale ?? 1), 'phys');
          if (c.target.alive) b.applyStatus(c.target, 'stun', { duration: s.bb.stun ?? 0, source: e2 });
        } });
      }, { cond: (b, e2) => cands(b, e2).length > 0 })];
    }
    case 'enemy_2004_balloon': {
      // 喷气人 · 升空 when blocked → 飞行模式 for `duration` s: PRTS 喷气人 "近地悬浮，不可阻挡，失衡免疫，移动速度+50%，不进行
      // 攻击" — an air unit meanwhile (flag `float`: melee cannot hit it; it keeps the ground path, as setFloat), never
      // displaced; "切换为飞行模式后，1.5秒内移动速度最终降低90% … 结束后，1.333秒内不可阻挡，移动速度最终降低90%" (PRTS numbers:
      // the blackboard has only the duration and the +50 %).
      const s = ab.sk.TakeOff;
      const BRAKE = { moveMul: 0.1 }, BRAKE_UP = 1.5, LANDING = 1.333;
      return [skill(s, (b, e2) => {
        b.addBuff(e2, {
          key: 'ab:takeoff', duration: s.bb.duration ?? 0, flags: { unblockable: true, float: true, noDisplace: true }, mods: { moveMul: 1 + (s.bb['balloon_s[fly].move_speed'] ?? 0) }, visible: true,
          onExpire: ({ battle }) => { if (e2.alive) battle.addBuff(e2, { key: 'ab:landing', duration: LANDING, flags: { unblockable: true }, mods: BRAKE }); },
        });
        b.addBuff(e2, { key: 'ab:takeoffBrake', duration: BRAKE_UP, mods: BRAKE });
        b.fx('telegraph', { x: e2.x, y: e2.y, r: 0.5, kind: 'takeoff', id: e2.id });
      }, { cond: (b, e2) => !!e2.blockedBy })];
    }
    case 'enemy_2005_axetro':
      return [{
        attack(c, b, e2, a) {
          a.last = b.time;
          b.addBuff(e2, { key: 'ab:axeStack', refresh: 'stack', stacks: 1, maxStacks: T(ab, 'atkup.max_stack_cnt') ?? 1, persist: true, mods: { atkPct: T(ab, 'atkup.atk') ?? 0, aspd: T(ab, 'atkup.attack_speed') ?? 0 } });
        },
        iv: 0.5,
        tick(b, e2, a) { if (a.last != null && b.time - a.last >= (T(ab, 'checker.delay') ?? 4)) { a.last = null; b.removeBuff(e2, 'ab:axeStack'); } },
      }];
    case 'enemy_2008_flking': {
      // 使全战场我方所有单位攻击力、防御力减半 (text; the blackboard's atkdown.atk_scale is not the halving),
      // 部署费用回复速度减半，再部署时间加倍; 周期性地添加正比于自身最大生命值的伤害防护屏障
      const s = ab.sk.refreshshield;
      return [{
        iv: 0.5,
        tick(b) {
          for (const u of b.allies()) {
            auraBuff(b, u, 'ab:tombstone', 0.5, { atkMul: 0.5, defMul: 0.5 }, null, true);
            // persistent so it still counts when the unit falls (the redeploy timer is set at death)
            b.addBuff(u, { key: 'ab:tombRedeploy', duration: 0.6, refresh: 'replace', persist: true, mods: { redeployMul: 2 } });
          }
        },
      }, {
        tick(b, e2, a, dt) { for (const p of b.players) b.addDp(p.playerId, -0.5 * b.flags.dpPerSec * dt); },
      }, skill(s, (b, e2) => b.addBuff(e2, { key: 'ab:tombShield', shield: e2.s.maxHp * (s.bb.hp_ratio ?? 0), persist: true }))];
    }
    case 'enemy_2048_smgrd':
      // 持续在自身周围8格生成【国度】 (the 3×3 around its tile), 大幅降低其中我方单位的攻击速度; 对【国度】中的我方单位造成高额物理伤害
      return [{
        iv: 0.5,
        tick(b, e2) { for (const u of alliesInTiles(b, Math.round(e2.y), Math.round(e2.x), 'box', 1)) auraBuff(b, u, 'ab:blackFog', 0.5, { aspd: T(ab, 'BlackFog.attack_speed') ?? 0 }, null, true); },
        hitOut(c, b, e2) {
          const t = c.target;
          if (c.dmg.isAttack && t.side === 'ally' && Math.max(Math.abs(t.tileR - Math.round(e2.y)), Math.abs(t.tileC - Math.round(e2.x))) <= 1) c.dmg.amount *= T(ab, 'DamageUp.atk_scale') ?? 1;
        },
      }];
    case 'enemy_2050_smsha': {
      const cold = T(ab, 'Attack.attack@freeze') ?? 0, n = T(ab, 'Attack.attack@chain.max_target') ?? 1, fall = T(ab, 'Attack.attack@chain.atk_scale') ?? 1;
      const jr = T(ab, 'Attack.attack@projectile_range') ?? 1.6;
      const cb = ab.sk.ChainBuff;
      return [onHitStatus('cold', cold), {
        dealt(c, b, e2) {
          let prev = c.target;
          const hit = new Set([prev]);
          for (let k = 1; k < n; k++) {
            const nx = b.alliesInRadius(prev.x, prev.y, jr).find((u) => !hit.has(u));
            if (!nx) break;
            hit.add(nx);
            hurt(b, e2, nx, e2.s.atk * Math.pow(fall, k), 'arts');
            if (nx.alive && cold > 0) b.applyStatus(nx, 'cold', { duration: cold, source: e2 });
            prev = nx;
          }
        },
      },
      // 【反自然馈赠】 (SILENCE): "attacks" another enemy in range and jumps between up to chain.max_target enemies
      // (projectile_range per jump), raising their move speed and ASPD for `duration` s
      skill(cb, (b, e2) => {
        const bb = cb.bb, jump = bb.projectile_range ?? jr, max = bb['chain.max_target'] ?? 3;
        const near = (x, y, r, seen) => b.enemiesInRadius(x, y, r).filter((o) => o !== e2 && !seen.has(o))
          .sort((p, q) => Math.hypot(p.x - x, p.y - y) - Math.hypot(q.x - x, q.y - y) || p.spawnSeq - q.spawnSeq)[0];
        const seen = new Set();
        let prev = e2, cur = near(e2.x, e2.y, e2.base.rangeRadius || 3.5, seen);
        while (cur && seen.size < max) {
          seen.add(cur);
          b.fx('beam', { x: prev.x, y: prev.y, from: prev.id, to: cur.id, kind: 'chainBuff' });
          b.addBuff(cur, { key: 'ab:chainBuff', duration: bb.duration ?? 0, refresh: 'replace', visible: true, mods: { moveMul: 1 + (bb.move_speed ?? 0), aspd: bb.attack_speed ?? 0 } });
          prev = cur;
          cur = near(cur.x, cur.y, jump, seen);
        }
      }, { sil: true, cond: (b, e2) => b.enemiesInRadius(e2.x, e2.y, e2.base.rangeRadius || 3.5).some((o) => o !== e2) })];
    }
    case 'enemy_2052_smgia': {
      // 数次攻击后晕眩; 受到来自自然环境的伤害时 (terrain damage), 自身在短时间内获得高额脆弱 (damage taken ×damage_scale)
      const lim = T(ab, 'Weak.weak[limit]') ?? 0, scale = T(ab, 'Weak.damage_scale') ?? 1;
      return [nthAttackStatus(nthOf(ab.sk.StunAttack), 'stun', (ab.sk.StunAttack && ab.sk.StunAttack.bb.stun) || 0, false), {
        taken(c, b, e2) {
          if (!(lim > 0) || !(c.amount > 0) || !(c.dmg.tags && c.dmg.tags.includes('terrain'))) return;
          b.addBuff(e2, { key: 'ab:natureWeak', duration: lim, refresh: 'replace', visible: true, mods: { dmgTakenMul: scale } });
        },
      }];
    }
    default:
      return [];
  }
}

// ---------------------------------------------------------------------------------------------------------------
// multi-form leaders (悬赏 bounty targets): the first knock-out switches them to their second form (reborn helper)

/** Distance from point p to segment a–b. */
function segDist(px, py, ax, ay, bx, by) {
  const dx = bx - ax, dy = by - ay, L = dx * dx + dy * dy;
  const t = L > 0 ? Math.max(0, Math.min(1, ((px - ax) * dx + (py - ay) * dy) / L)) : 0;
  return Math.hypot(px - (ax + t * dx), py - (ay + t * dy));
}

/** A second normal hit on the same target ("二连击"): same damage type, no further on-hit procs. */
const doubleHit = (on = () => true, extra = null) => ({
  dealt(c, b, e, a) {
    if (!on(b, e, a) || !c.target.alive) return;
    b.dealDamage(e, c.target, { amount: e.s.atk, type: c.dmg.type, canDodge: true, tags: ['enemyAbility', 'secondHit'], ...(extra ? extra(c, b, e) : {}) });
  },
});

/** 巨大的丑东西 · melee ×rage; KO ⇒ self-destruct (big stun) and the 大祭司 pilot ejects: no attack, unblockable, own DEF/RES,
 *  faster, loses bird_run.damage true HP per second. (巨蕈/木桩 tiles and its ranged splash attack have no counterpart here:
 *  its data radius is 0.) */
function kitUglyThing(ab) {
  const rage = T(ab, 'combat.attack@mcmstr_rage_attack.atk_scale') ?? 1;
  const bomb = ab.sk['bomb[reborning]'] ? ab.sk['bomb[reborning]'].bb : {};
  const run = { spd: T(ab, 'bird_run.move_speed') ?? 0, def: T(ab, 'bird_run.def'), res: T(ab, 'bird_run.magic_resistance'), dmg: T(ab, 'bird_run.damage') ?? 0 };
  const P = { pilot: false };
  return [
    { hitOut(c, b, e) { if (!P.pilot && c.dmg.isAttack && c.target === e.blockedBy) c.dmg.amount *= rage; } },   // 近战攻击造成更高伤害
    reborn({
      dur: T(ab, 'reborn.duration') ?? 0,
      onKo(b, e) {                                  // 生命值降至0后自爆，造成大范围晕眩
        b.fx('explode', { x: e.x, y: e.y, r: MCM_BOMB_RADIUS, kind: 'mechBomb', id: e.id });
        for (const u of b.alliesInRadius(e.x, e.y, MCM_BOMB_RADIUS)) {
          hurt(b, e, u, e.s.atk * (bomb.atk_scale ?? 0), 'phys');
          if (u.alive && bomb.stun > 0) b.applyStatus(u, 'stun', { duration: bomb.stun, source: e });
        }
      },
      onReborn(b, e) {                              // 大祭司形态: 不进行攻击，无法被阻挡，每秒受到真实伤害
        P.pilot = true;
        e.profile.noAttack = true;
        b.addBuff(e, {
          key: 'ab:pilot', persist: true, visible: true, flags: { unblockable: true }, interval: 1,
          mods: { moveMul: 1 + run.spd, defFlat: run.def != null ? run.def - e.base.def : 0, resFlat: run.res != null ? run.res - e.base.res : 0 },
          onTick: ({ battle, unit }) => { if (run.dmg > 0) battle.dealDamage(null, unit, { amount: run.dmg, type: 'true', canDodge: false, tags: ['enemyAbility', 'pilotBurn'] }); },
        });
      },
    }),
  ];
}

/** 杰斯顿·威廉姆斯 · 狱警: RES +enhance, ranged arts, every (sp+1)th attack stuns max_target units; KO ⇒ (reborn.duration s)
 *  杀手: frees every prisoner, DEF/ATK/ASPD/speed up, melee physical, every (sp+1)th attack hits `times` × ignoring def_penetrate. */
function kitWarden(ab) {
  const en = (k) => T(ab, `enhance.${k}`) ?? 0;
  const iron = ab.sk.ironsandstorm, pierce = ab.sk.armorpiercing;
  const P = { killer: false, n: 0, power: false };
  const pen = () => (pierce && pierce.bb.def_penetrate) || 0;
  return [{
    spawn(b, e, a, ab2) {
      ab2.atkType = 'arts';                                    // 攻击造成远程法术伤害
      e.profile.melee = false;
      b.addBuff(e, { key: 'ab:warden', persist: true, visible: true, mods: { resFlat: en('magic_resistance') } });  // 法术抗性大幅提升
    },
    before(c, b) { const s = P.killer ? pierce : iron; P.power = !!s && (P.n + 1) % nthOf(s) === 0; },
    hitOut(c) { if (P.killer && P.power && c.dmg.isAttack) c.dmg.defIgnorePct = Math.min(1, (c.dmg.defIgnorePct || 0) + pen()); },
    dealt(c, b, e) {
      if (!P.killer || !P.power || !pierce) return;
      for (let i = 1; i < (pierce.bb.times ?? 1) && c.target.alive; i++) b.dealDamage(e, c.target, { amount: e.s.atk, type: 'phys', defIgnorePct: pen(), canDodge: true, isSkill: true, tags: ['enemyAbility', 'armorPiercing'] });
    },
    attack(c, b, e) {
      P.n++;
      if (!P.power || P.killer || !iron) return;
      // 能使多名单位晕眩: the skill attack stuns up to max_target units in its range (its target first)
      const l = byPriority(e, targetsNear(b, e, e.base.rangeRadius || 2));
      for (const t of c.targets) if (!l.includes(t)) l.unshift(t);
      for (const u of l.slice(0, iron.bb.max_target ?? 1)) if (u.alive) b.applyStatus(u, 'stun', { duration: iron.bb.stun ?? 0, source: e });
    },
  }, reborn({
    dur: T(ab, 'reborn.duration') ?? 0,
    onKo(b) { freeAllPrisoners(b); },                         // 进入杀手形态时解放全场敌人
    onReborn(b, e) {
      P.killer = true; P.n = 0;
      e.mem.ab.atkType = null;                                 // 攻击造成近战物理伤害
      e.profile.melee = true;
      b.removeBuff(e, 'ab:warden');
      b.addBuff(e, { key: 'ab:killer', persist: true, visible: true,
        mods: { defFlat: en('def'), atkFlat: en('atk'), batPct: en('base_attack_time') / (e.base.bat || 1), moveFlat: en('move_speed') } });
    },
  })];
}

/** “自在” · 【纬地经天】 arts cross on the nearest unit (form 2: + the farthest); 【破桎而出】 barrier — unbroken after its
 *  duration ⇒ ATK×atk_scale arts around; KO ⇒ second form (ATK up, double hits, stronger 破桎而出). 晦明 attributes n/a. */
function kitXi(ab) {
  const cross = ab.sk.CrossAttack, sb = ab.sk.ShieldBurst, sb2 = ab.sk.ShieldBurstReborn;
  const P = { form2: false };
  const byDist = (b, e) => allTargets(b, e).sort((p, q) => Math.hypot(p.x - e.x, p.y - e.y) - Math.hypot(q.x - e.x, q.y - e.y) || aggroCmp(p, q));
  const crossAt = (b, e, t) => {
    const r0 = t.tileR, c0 = t.tileC;
    b.fx('telegraph', { x: c0, y: r0, r: XI_CROSS_REACH, kind: 'xiCross', tiles: 'plus', id: e.id });
    for (const u of alliesInTiles(b, r0, c0, 'plus', XI_CROSS_REACH)) if (u.tileR === r0 || u.tileC === c0) hurt(b, e, u, e.s.atk * ((cross && cross.bb.atk_scale) ?? 1), 'arts');
  };
  const burst = (s) => (b, e) => {
    const dur = s.bb.duration ?? 0, r = s.bb.range_radius ?? 0;
    b.fx('telegraph', { x: e.x, y: e.y, r, dur, kind: 'breakFree', id: e.id });
    b.addBuff(e, { key: 'ab:xiShield', duration: dur, shield: s.bb.dynamic ?? 0, visible: true,
      // expiry (not breaking: a broken barrier is removed without onExpire) = the barrier held
      onExpire: ({ battle }) => {
        if (!e.alive) return;
        battle.fx('explode', { x: e.x, y: e.y, r, kind: 'breakFree', id: e.id });
        for (const u of battle.alliesInRadius(e.x, e.y, r)) hurt(battle, e, u, e.s.atk * (s.bb.atk_scale ?? 0), 'arts');
      } });
  };
  const re = reborn({
    dur: T(ab, 'reborn.duration') ?? 0, invincible: T(ab, 'reborn.invincible') ?? 0,
    onKo(b, e) { b.removeBuff(e, 'ab:xiShield'); },
    onReborn(b, e) {
      P.form2 = true;
      b.addBuff(e, { key: 'ab:xiReborn', persist: true, visible: true, mods: { atkPct: T(ab, 'reborn.atk') ?? 0 } });   // 攻击力提升
      if (s2) s2.left = s2.icd;
    },
  });
  const s1 = skill(sb, burst(sb), { cond: () => !P.form2 });
  const s2 = skill(sb2, sb2 ? burst(sb2) : null, { cond: () => P.form2 });
  return [re, s1, s2, doubleHit(() => P.form2),                   // 普通攻击进行两次
    skill(cross, (b, e) => {
      const l = byDist(b, e);
      if (!l.length) return;
      crossAt(b, e, l[0]);
      if (P.form2 && l.length > 1) crossAt(b, e, l[l.length - 1]);   // 额外对最远目标释放
    }, { cond: (b, e) => allTargets(b, e).length > 0 })];
}

/** 锏 · 抵抗; DEF penetration against its blocker; 【速杀】 passes through its blocker hitting those on the way; 【肆虐风雪】
 *  AoE; KO ⇒ second form: stealth, more penetration, double hits, 【瞬息杀机】 at every 25 % HP lost (SP cleared + no attacks
 *  / heals around it). <降雪> absent. */
function kitMace(ab) {
  const pen1 = T(ab, 'DefPenetrate.enemy_blkswb_t_2.def_penetrate') ?? 0, pen2 = T(ab, 'DefPenetrate.enemy_blkswb_t_2[reborn].def_penetrate') ?? pen1;
  const cs = { ratio: T(ab, 'ClearSp.hp_ratio') ?? 0, dur: T(ab, 'ClearSp.duration') ?? 0, r: T(ab, 'ClearSp.range_radius') ?? 0 };
  const P = { form2: false, next: 1 };
  const penOn = (c, e) => (c.target === e.blockedBy ? (P.form2 ? pen2 : pen1) : 0);
  const blink = (s) => (b, e) => {
    const bl = e.blockedBy;
    const from = blinkForward(b, e, s.bb.dist ?? 1.5);
    if (!from) return;
    for (const u of b.allies()) {
      if (u !== bl && segDist(u.x, u.y, from.x, from.y, e.x, e.y) > 0.5) continue;
      hurt(b, e, u, e.s.atk * (s.bb.atk_scale ?? 1), 'phys');
    }
  };
  const circle = (s) => (b, e) => {
    const r = s.bb.range_radius ?? 0;
    b.fx('explode', { x: e.x, y: e.y, r, kind: 'blizzard', id: e.id });
    for (const u of b.alliesInRadius(e.x, e.y, r)) hurt(b, e, u, e.s.atk * (s.bb.atk_scale ?? 1), 'phys');
  };
  const inR = (b, e, s) => b.alliesInRadius(e.x, e.y, (s && s.bb.range_radius) || 0).length > 0;
  return [resist(), {
    hitOut(c, b, e) { const p = penOn(c, e); if (c.dmg.isAttack && p > 0) c.dmg.defIgnorePct = Math.min(1, (c.dmg.defIgnorePct || 0) + p); },
    taken(c, b, e) {                                             // 【瞬息杀机】 every hp_ratio of max HP lost (second form)
      if (!P.form2 || !(cs.ratio > 0)) return;
      while (e.alive && e.hpRatio <= P.next - cs.ratio + 1e-9 && P.next - cs.ratio > 1e-9) {
        P.next -= cs.ratio;
        b.fx('explode', { x: e.x, y: e.y, r: cs.r, kind: 'clearSp', id: e.id });
        for (const u of b.alliesInRadius(e.x, e.y, cs.r)) {
          const sk = u.skill;
          if (sk && !sk.noSkill && sk.kind !== 'passive' && !sk.active && sk.spCost > 0) { sk.sp = 0; sk.charges = 0; }   // 清空技力 (stored charges too)
          if (cs.dur > 0) b.applyStatus(u, 'disarm', { duration: cs.dur, source: e });
        }
      }
    },
  }, doubleHit(() => P.form2, (c, b, e) => ({ defIgnorePct: penOn(c, e) })),
  skill(ab.sk.Blink, blink(ab.sk.Blink || { bb: {} }), { id: 'blink', cond: (b, e) => !P.form2 && !!e.blockedBy }),
  skill(ab.sk.Blink2, blink(ab.sk.Blink2 || { bb: {} }), { id: 'blink2', cond: (b, e) => P.form2 && !!e.blockedBy }),
  skill(ab.sk.CircleAttack, circle(ab.sk.CircleAttack || { bb: {} }), { id: 'circle', cond: (b, e) => !P.form2 && inR(b, e, ab.sk.CircleAttack) }),
  skill(ab.sk.CircleAttack2, circle(ab.sk.CircleAttack2 || { bb: {} }), { id: 'circle2', cond: (b, e) => P.form2 && inR(b, e, ab.sk.CircleAttack2) }),
  reborn({
    dur: T(ab, 'Reborn.duration') ?? 0, invincible: T(ab, 'Reborn.invincible') ?? 0,
    onReborn(b, e) { P.form2 = true; P.next = 1; b.addBuff(e, { key: 'ab:stealth', flags: { stealth: true }, persist: true }); },
  })];
}

/** 扎罗，“狼之主” · first form: damage taken −30 %, not stunnable, 【溶血骇惧】 (3 units: ASPD −70, accelerating HP loss,
 *  cured once 扎罗 loses hp_ratio of its HP); KO ⇒ 【远古威慑】 rebirth (Reborn.duration s: ASPD down around it while its HP
 *  refills) ⇒ second form: ranged double hits, ATK/ASPD up, invincible at first. 血债账款 / 【狂暴怒嗥】 absent. */
function kitWolfLord(ab) {
  const fc = ab.sk.FearCage;
  const P = { form2: false };
  const cure = (b) => { for (const u of b.allies()) { const d = u.findBuff('ab:fearCage'); if (d) b.removeBuff(u, d); } };
  return [{
    spawn(b, e, a, ab2) {
      ab2.immune = new Set([...(ab2.immune || []), 'stun']);   // 第一形态: 不可被晕眩
      b.addBuff(e, { key: 'ab:wolfGuard', persist: true, visible: true, mods: { dmgTakenMul: 1 - (T(ab, 'Passive.damage_resistance') ?? 0) } });
    },
    iv: 0.25,
    tick(b, e) {                                                // afflicted units recover once 扎罗 lost hp_ratio since the cast
      if (!fc) return;
      for (const u of b.allies()) {
        const d = u.findBuff('ab:fearCage');
        if (d && d.data.src === e && e.hpRatio <= d.data.hp0 - (fc.bb.hp_ratio ?? 0) + 1e-9) b.removeBuff(u, d);
      }
    },
  },
  // 【溶血骇惧】 every spCost s (enemy SP +1/s [ASSUMED]), first form only
  skill(fc, (b, e) => {
    const l = b.rng.shuffle(allTargets(b, e).filter((u) => u.kind === 'op' && !u.findBuff('ab:fearCage'))).slice(0, fc.bb.max_target ?? 3);
    const dur = fc.bb.duration_bleed ?? 0;
    for (const u of l) {
      b.fx('beam', { x: e.x, y: e.y, from: e.id, to: u.id, kind: 'fearCage' });
      b.addBuff(u, { key: 'ab:fearCage', duration: dur, refresh: 'replace', visible: true, interval: 1, data: { src: e, hp0: e.hpRatio, t0: b.time },
        mods: { aspd: fc.bb.attack_speed ?? 0 },
        onTick: ({ battle, unit, buff }) => { const k = Math.min(1, (battle.time - buff.data.t0) / Math.max(1, dur)); battle.loseHp(unit, unit.s.maxHp * WOLF_BLEED_PEAK * k, { source: e }); } });
    }
  }, { cd: fc ? fc.sp || fc.cd : null, icd: fc ? fc.sp || fc.icd : null, cond: (b, e) => !P.form2 && allTargets(b, e).some((u) => u.kind === 'op') }),
  doubleHit(() => P.form2),                                     // 攻击变为远程二连击
  reborn({
    dur: T(ab, 'Reborn.duration') ?? 0, invincible: T(ab, 'Passive2.invincible_time') ?? 0,
    onKo(b, e) {
      cure(b);
      b.removeBuff(e, 'ab:wolfGuard');
      if (e.mem.ab.immune) e.mem.ab.immune.delete('stun');
    },
    during(b, e, a, t) {                                         // 【远古威慑】: nearby operators slowed; its HP refills slowly
      const dur = T(ab, 'Reborn.duration') ?? 1;
      e.hp = Math.max(1, e.s.maxHp * Math.min(1, t / Math.max(TICK, dur)));
      for (const u of b.alliesInRadius(e.x, e.y, WOLF_AWE_RADIUS)) auraBuff(b, u, 'ab:ancientAwe', 0.2, { aspd: WOLF_AWE_ASPD }, null, true);
    },
    onReborn(b, e) {
      P.form2 = true;
      e.profile.melee = false;
      e.base.rangeRadius = Math.max(e.base.rangeRadius || 0, WOLF_RANGE);
      b.addBuff(e, { key: 'ab:wolfRage', persist: true, visible: true, mods: { atkPct: T(ab, 'Passive2.atk') ?? 0, batPct: (T(ab, 'Passive2.base_attack_time') ?? 0) / (e.base.bat || 1) } });
    },
  })];
}

/**
 * 转译基底·α (PRTS 转译基底·α 天赋; enemy_database talents Passive / Mode_*_Passive / Mode_Fuchou_Anger; skills ChangeToB/C/D):
 * 原始形态 — no attack, every damage instance is cancelled ("受到伤害时取消此伤害"), 失衡免疫, immune to 晕眩/沉睡/寒冷/冻结/浮空/
 * 恐惧. The 4th physical damage instance taken ⇒ 寻仇者, the 4th arts one ⇒ 特战术师, being blocked ⇒ 幽灵 — once ("仅可变化一次");
 * the change takes TRANSLATOR_CHANGE (2) s, standing still and still in the original form [ASSUMED: immobile, damage
 * still cancelled]; then the form's flat stat changes apply (move speed relative to the data's 1.0, attack interval
 * +N s, 重量等级 +N):
 *   寻仇者 (form B): melee only, physical; ATK +100 % while HP < 50 % (Mode_Fuchou_Anger.atk);
 *   特战术师 (form D): ranged only (the data's 2.4 radius), arts, 2 targets at once — flyers included [ASSUMED: the
 *     translator's text "仅进行远程攻击，同时攻击2个目标，造成法术伤害" names no exception; the standalone PRTS 特战术师's talent
 *     "不会攻击飞行单位" may carry over — then `canTarget: (u) => !u.isFlying` in finish()];
 *   幽灵 (form C): no stat change, unblockable, no attack (PRTS 转译基底·α "幽灵形态 无属性变化；无法被阻挡" — no attack line,
 *     unlike the armed forms — and the linked PRTS 幽灵 天赋 "不进行普通攻击，无法被阻挡", 攻击方式 不攻击).
 * The armed forms attack through the engine's enemy attack (ai.js enemyAttack, `profile.dmgType`), so attack clips,
 * projectiles and the attack hooks are the normal ones. Before its change ends it cannot be killed at all (damage is
 * cancelled; an HP loss stops at 1 HP) — user report after 0.1.0 (#5): its model never changed (no FORMS clip set), so
 * it died on the manifest's die clip, the 寻仇者's B_Die, from its first-form look; and the v2.5 kit let damage through,
 * so some lineups killed it before either counter reached 4. fx 'phase' {id, kind: translator_fuchou | _shushi | _youling} starts the model's 2 s
 * change clip (render/units.js FORMS). Form letters: B / C / D follow the talents' order Fuchou / Youling / Shushi — C,
 * the only clip set without an attack, is the non-attacking 幽灵 (skills ChangeToB / C / D).
 */
function kitTranslator(ab, e) {
  const t = (k) => T(ab, k) ?? 0;
  const P = { phys: 0, arts: 0, form: null, done: false, anger: false };
  const PRE = { fuchou: 'Mode_Fuchou_Passive', shushi: 'Mode_Shushi_Passive', youling: 'Mode_Youling_Passive' };
  const mods = (pre) => ({
    hpFlat: t(`${pre}.max_hp`), atkFlat: t(`${pre}.atk`), defFlat: t(`${pre}.def`), resFlat: t(`${pre}.magic_resistance`),
    moveMul: Math.max(0, 1 + t(`${pre}.move_speed`) / (e.def.moveSpeed || 1)), batPct: t(`${pre}.base_attack_time`) / (e.base.bat || 1),
    massFlat: t(`${pre}.mass_level`),
  });
  const finish = (b, e2) => {
    if (!e2.alive || P.done) return;
    P.done = true;
    b.removeBuff(e2, 'ab:origin');
    ab.immune = null;
    b.addBuff(e2, { key: 'ab:form', persist: true, visible: true, mods: mods(PRE[P.form]), flags: P.form === 'youling' ? { unblockable: true } : null });
    if (P.form !== 'youling') {
      const melee = P.form === 'fuchou';
      Object.assign(e2.profile, { noAttack: false, melee, dmgType: melee ? 'phys' : 'arts', maxTargets: melee ? 1 : 2 });
      e2.atkCd = 0;
    }
    if (e2.route) e2.route.pts = null;
  };
  const change = (b, e2, form) => {
    if (P.form || !e2.alive) return;
    P.form = form;
    b.addBuff(e2, { key: 'ab:change', duration: TRANSLATOR_CHANGE, persist: true, flags: { noMove: true }, onExpire: ({ battle }) => finish(battle, e2) });
    setForm(b, e2, `translator_${form}`, 'phase', { dur: TRANSLATOR_CHANGE });
  };
  return [{
    spawn(b, e2) {
      b.addBuff(e2, { key: 'ab:origin', persist: true, flags: { noDisplace: true } });
      ab.immune = new Set(TRANSLATOR_IMMUNE);
    },
    hitIn(c, b, e2) {
      if (P.done) return;
      const s = c.source || c.credit, ty = c.dmg.type;
      if (!P.form && s && s.side === 'ally') {
        if (ty === 'phys' && ++P.phys >= (t('Passive.phy_max_count') || 4)) change(b, e2, 'fuchou');
        else if (ty === 'arts' && ++P.arts >= (t('Passive.magic_max_count') || 4)) change(b, e2, 'shushi');
      }
      c.dmg.cancel = true;
    },
    // an HP loss (流失 — no 伤害 instance, so not cancelled: 隐德来希's 心烛 hand-over …) cannot knock it out before its
    // change ends: its original form has no death clip of its own (A_Die_B / _C / _D are the changes) [ASSUMED floor 1 HP]
    killed(c, b, e2) {
      if (P.done) return false;
      e2.hp = Math.max(1, e2.hp);
      return true;
    },
    blocked(c, b, e2) { change(b, e2, 'youling'); },
    tick(b, e2) {
      // 寻仇者: "生命值低于50%时，攻击力+100%"
      if (P.form !== 'fuchou' || !P.done) return;
      const on = e2.hpRatio < 0.5;
      if (on === P.anger) return;
      P.anger = on;
      if (on) b.addBuff(e2, { key: 'ab:anger', persist: true, visible: true, mods: { atkPct: t('Mode_Fuchou_Anger.atk') } });
      else b.removeBuff(e2, 'ab:anger');
    },
  }];
}

/** 乌顶巨角卢鲁 · 【角力对决】 when blocked: charges `duration` s (no normal attacks; a stun or 失衡 interrupts), then hits its
 *  blocker; operators hold fixed tiles, so the push always fails ⇒ extra damage and a fail_duration stun. */
function kitElk(ab) {
  const s = ab.sk.skill;
  const P = { ch: null };
  const stop = (b, e) => { P.ch = null; b.removeBuff(e, 'ab:elkCharge'); };
  return [{
    tick(b, e) {
      const ch = P.ch;
      if (!ch) return;
      if (e.s.flags.stun || !ch.t.alive || e.blockedBy !== ch.t) { stop(b, e); b.fx('phase', { x: e.x, y: e.y, id: e.id, kind: 'chargeBroken' }); return; }
      if (b.time + 1e-9 < ch.until) return;
      stop(b, e);
      b.fx('explode', { x: ch.t.x, y: ch.t.y, r: 0.5, kind: 'elkClash' });
      hurt(b, e, ch.t, e.s.atk * ((s && s.bb.atk_scale_s) ?? 1) * ELK_FAIL_SCALE, 'phys');
      const st = T(ab, 'data.attack@fail_duration') ?? 0;
      if (ch.t.alive && st > 0) b.applyStatus(ch.t, 'stun', { duration: st, source: e });
    },
  }, unbalanced((b, e) => { if (P.ch) stop(b, e); }),
  skill(s, (b, e) => {
    const dur = s.bb.duration ?? 0;
    P.ch = { t: e.blockedBy, until: b.time + dur };
    b.addBuff(e, { key: 'ab:elkCharge', duration: dur + 0.1, visible: true, flags: { disarm: true } });
    b.fx('telegraph', { x: e.blockedBy.x, y: e.blockedBy.y, r: 0.5, dur, kind: 'elkCharge', id: e.id });
  }, { cond: (b, e) => !P.ch && !!(e.blockedBy && e.blockedBy.alive) })];
}

// ---------------------------------------------------------------------------------------------------------------
// KITS: enemyKey → (ab, e, battle) => ability list. One line per key (name · what).

export const KITS = Object.freeze({
  // --- INVISIBLE 隐匿
  enemy_1009_lurker: kitStealth,                                     // 潜伏者 · stealth
  enemy_1019_jshoot: kitStealth,                                     // 隐形弩手 · stealth
  enemy_1019_jshoot_2: kitStealth,                                   // 隐形弩手组长 · stealth
  enemy_1023_jmage: kitStealth,                                      // 隐形术师 · stealth
  enemy_1283_sgkill: kitStealth,                                     // 家族灭迹人 · stealth (清算时刻 n/a)
  enemy_1283_sgkill_2: kitStealth,                                   // 家族暗影灭迹人 · stealth
  enemy_1299_ymkilr: kitShadowKiller,                                // 山海众头目 · stealth, 1st attack after being blocked ×InvisibleCombat.atk_scale
  enemy_1299_ymkilr_2: kitShadowKiller,                              // 山海众秘使 · same
  enemy_1389_winbab_2: kitStealth,                                   // 访问团强攻冠军 · stealth (供暖器 priority n/a)
  enemy_1404_msnip: kitCrossbow,                                     // 重弩突袭者 · stealth + 直击 (row/column bolt: arts + stun, reveals itself)
  enemy_10031_cnvsld: kitStealth,                                    // 业余竞演者 · stealth
  enemy_10034_cnvsax: kitJazz,                                       // 节日爵士乐手 · stealth, attacks only when revealed; channel on one target (arts + burn)
  enemy_10042_prtrop: kitStealth,                                    // 架桥船工 · stealth (bridges n/a)
  enemy_10042_prtrop_2: kitStealth,                                  // 扶桥老手 · stealth
  enemy_9008_acbunn: kitBoneSpike,                                   // 假想敌：骨刺 · stealth; hits 3 targets while stealthed
  enemy_1175_dushdo_2: kitShadowBlade,                               // 深池伙友影刃精英 · stealth; BAT −1.3 s next to 卫队精英
  enemy_2034_sythef: (ab) => [stealth(), onHitStatus('stun', T(ab, 'Combat.attack@stun'))],   // 流泪小子 · stealth, attacks stun
  enemy_2034_sythef_2: (ab) => [stealth(), onHitStatus('stun', T(ab, 'Combat.attack@stun'))], // 流泪小子 · same

  // --- TIMES 频次 (hit-count units + their creators)
  enemy_1196_msfyin: kitTimes(),                                     // 木制瑞印 · 2 hits, unblockable
  enemy_1196_msfyin_2: kitTimes(),                                   // 红木瑞印 · 3 hits
  enemy_1198_msfshu: kitTimes(),                                     // 小说卷轴 · 3 hits
  enemy_1198_msfshu_2: kitTimes(),                                   // 诗画卷轴 · 4 hits
  enemy_1200_msfjin: kitTimes(),                                     // 青铜镜 · 30 hits
  enemy_1200_msfjin_2: kitTimes(),                                   // 黄铜镜 · 35 hits
  enemy_1202_msfzhi: kitTimes(),                                     // 木制镇纸 · 3 hits
  enemy_1202_msfzhi_2: kitTimes(),                                   // 红木镇纸 · 4 hits
  enemy_1204_msfhu: kitTimes(true),                                  // 青瓷茶器 · 4 arts/true hits
  enemy_1204_msfhu_2: kitTimes(true),                                // 彩瓷茶器 · 6 arts/true hits
  enemy_1208_msfji: kitTimes(),                                      // 铜矛头 · 25 hits
  enemy_1208_msfji_2: kitTimes(),                                    // 铁矛头 · 30 hits
  enemy_1210_msfden: kitTimes(),                                     // 铜灯盘 · 35 hits
  enemy_1210_msfden_2: kitTimes(),                                   // 铁灯盘 · 45 hits
  enemy_1195_sfyin: kitDeathSpawn(),                                 // 磨砻 · death: 2 木制瑞印
  enemy_1195_sfyin_2: kitDeathSpawn(),                               // 明鉴 · death: 2 红木瑞印
  enemy_1197_sfshu: kitDeathSpawn(),                                 // 俗心 · death: 3 小说卷轴
  enemy_1197_sfshu_2: kitDeathSpawn(),                               // 雅气 · death: 3 诗画卷轴
  enemy_1199_sfjin: kitDeathSpawn(),                                 // 身观 · death: 1 青铜镜 (taunt from data)
  enemy_1207_sfji: kitBlades,                                        // 沉沙 · each attack spends a blade (+ATK); death: unspent blades → 铜矛头 (≥1)
  enemy_1207_sfji_2: kitBlades,                                      // 新硎 · same (铁矛头)
  enemy_1209_sfden: kitInvisShield,                                  // 清明 · veils nearby enemies (stealth) every 15 s; death: 铜灯盘
  enemy_1209_sfden_2: kitInvisShield,                                // 堂皇 · same (铁灯盘)
  enemy_1203_sfhu: kitTeapot,                                        // 烹泉 · death: 4 青瓷茶器 + ASPD-down arts blast zone
  enemy_1203_sfhu_2: kitTeapot,                                      // 沏虹 · death: 4 彩瓷茶器 + blast zone
  enemy_1288_duskls: kitEmber,                                       // 深池逐火战士 · every KO: 1 s 重生 ⇒ walking 隐匿 5-hit ember (block it to hit it), back after 10 s
  enemy_1288_duskls_2: kitEmber,                                     // 深池逐火精锐战士 · same
  enemy_1292_duskld: kitEmber,                                       // 深池逐火护卫 · 10-hit 火灰
  enemy_9010_acpupp: kitRegen,                                       // 假想敌：再生 · every KO: 1 s 重生 ⇒ walking unblockable 15-hit puppet (15 s) + 5-hit shields within 1.8

  // --- ELEMENT 元素
  enemy_1148_dssbr: kitEp('neural', 'epdamage.attack@ep_damage_ratio'),       // 底海滑动者 · neural on hit
  enemy_1148_dssbr_2: kitEp('neural', 'epdamage.attack@ep_damage_ratio'),     // 富营养的滑动者 · neural on hit
  enemy_1158_divman: (ab) => kitDeepsea(ab, { swim: true }),          // 潜水员 · in deep water: ATK up + stealth; immune to 水蚀
  enemy_1160_hvyslr: (ab) => [...kitStun3(ab), ...kitDeepsea(ab, { drown: true })],   // 码头水手 · every (spCost+1)th attack stuns; drowns in deep water
  enemy_1160_hvyslr_2: (ab) => [...kitStun3(ab), ...kitDeepsea(ab, { drown: true })], // 码头水手长 · same
  enemy_1161_tidmag: kitTidmag,                                      // 控潮术师 · attack hits target + 4 neighbours, erosion
  enemy_1161_tidmag_2: kitTidmag,                                    // 领潮员 · same
  enemy_1162_magmot: (ab) => [...kitTidmag(ab), deathSpawn(ab.tS['DeathRattle.enemy_key'], 1)], // 术师快艇 · same + 控潮术师 on death
  enemy_1305_mhslim: kitEp('burn', 'EpDamage.attack@ep_damage_ratio'),        // 灼热源石虫 · burn on hit
  enemy_1305_mhslim_2: kitEp('burn', 'EpDamage.attack@ep_damage_ratio'),      // 炽焰源石虫 · burn on hit
  enemy_2021_syfish: kitEp('erosion', 'EpDamage.attack@ep_damage_ratio'),     // 骨海漂流体 · erosion on hit
  enemy_2025_syufo: kitSyufo,                                        // 掠海漂移体 · 近地悬浮 (drops to 爬行模式 when stunned) + erosion
  enemy_1229_darmy: kitEp('apoptosis', 'epdamage.attack@ep_damage_ratio'),    // 萨卡兹王庭军战士 · apoptosis on hit
  enemy_1229_darmy_2: kitEp('apoptosis', 'epdamage.attack@ep_damage_ratio'),  // 萨卡兹王庭军精锐战士 · apoptosis on hit
  enemy_1275_dwlock_2: kitDeathEye,                                  // 萨卡兹王庭军精锐术师 · apoptosis on hit + DeathEye channel → group apoptosis
  enemy_1439_dslntf: kitNucleus,                                     // 元核孽生者 · first damage: combat state (speed ×, neural pulse around)
  enemy_1439_dslntf_2: kitNucleus,                                   // 异光体孽生者 · same
  enemy_9007_acelem: kitParasite,                                    // 假想敌：淤困 · taunt −1; parasitises its blocker (arts/s, element taken ×, its burst spreads 1000)
  enemy_10065_ftzlc: kitIgnitable,                                   // 卷心籽 · ignited by 灼藤 → arts death blast
  enemy_10067_ftsjc: kitFlameVine,                                   // 灼藤 · ATK ramps until the 1st attack (3×3 arts + burn), burn on hit, ignites 卷心籽

  // --- DOT 持续
  enemy_1234_dsubrl: kitDsubrl,                                      // 深溟巢涌者 · pulse hits every ally in range + neural; 抵抗, immune 停顿
  enemy_1234_dsubrl_2: kitDsubrl,                                    // 富营养的巢涌者 · same
  enemy_1267_nhpbr: kitPolluted,                                     // 萨卡兹枯朽战士 · death: 污染秽蚀 zone (50 / 25 true per second)
  enemy_1267_nhpbr_2: kitPolluted,                                   // 萨卡兹枯朽战士组长 · same
  enemy_1270_nhstlk: (ab) => [bleed(ab)],                            // 逐腐兽 · bleeding (arts/s, cleared by healing)
  enemy_1270_nhstlk_2: (ab) => [bleed(ab)],                          // 疯狂的逐腐兽 · same
  enemy_1272_nhtank: kitTank,                                        // 萨卡兹枯朽战车 · ground targets only, melee ×2, 秽蚀轰击 on attacks 1, 4, 7 …
  enemy_1272_nhtank_2: kitTank,                                      // 尖端萨卡兹枯朽战车 · same
  enemy_9006_actoxi: (ab) => [{                                      // 假想敌：蚀裂 · death: poison cloud on its killer
    sil: true,
    death(c, b, e) {
      if (c.reason !== 'killed') return;
      const k = c.killer && c.killer.side === 'ally' && c.killer.alive ? c.killer : null;
      const atk = e.s.atk;
      const cloud = (x, y) => dmgZone(b, null, x, y, T(ab, '1.projectile_range') ?? 0.8, T(ab, '1.projectile_life_time') ?? 0, T(ab, '1.interval') ?? 1, atk * (T(ab, '1.damage_atk_scale') ?? 0), 'arts', 'poison');
      if (k) b.addProjectile({ from: e, target: k, speed: 8, visual: 'lob', source: null, hitDead: true, onHit: (h) => cloud(h.x ?? k.x, h.y ?? k.y) });
      else cloud(e.x, e.y);
    },
  }],
  enemy_10122_uacann_2: (ab) => [{                                   // 集团军重型火炮 · each hit leaves a burning zone
    dealt(c, b, e) {
      dmgZone(b, e, c.target.x, c.target.y, T(ab, 'ProjectileBoomRange.attack@projectile_range') ?? 1, T(ab, 'ProjectileBoomRange.attack@projectile_life_time') ?? 0, 1, T(ab, 'ProjectileBoomRange.attack@value') ?? 0, 'arts', 'burning');
    },
  }],
  enemy_10054_cjhot: (ab, e) => [immuneTo('sluggish'), {             // 鼎沸 · pulses arts + burn around itself; immune 停顿
    iv: e.base.bat || 1,
    tick(b, e2) {
      const r = (e2.def.raw.stats && e2.def.raw.stats.rawRangeRadius) || 1.6;
      b.fx('explode', { x: e2.x, y: e2.y, r, kind: 'boil' });
      for (const u of b.alliesInRadius(e2.x, e2.y, r)) { hurt(b, e2, u, e2.s.atk * (T(ab, 'aoe.atk_scale') ?? 1), 'arts'); elem(b, e2, u, 'burn', e2.s.atk * (T(ab, 'aoe.ep_damage_ratio') ?? 0)); }
    },
  }],

  // --- REFLECTION 折射
  enemy_1165_duhond: kitRefraction,                                  // 深池侦察犬 · refraction
  enemy_1165_duhond_2: kitRefraction,                                // 深池侦察犬pro · refraction
  enemy_1166_dusbr: kitRefraction,                                   // 深池侦察兵 · refraction
  enemy_1166_dusbr_2: kitRefraction,                                 // 深池侦察队长 · refraction
  enemy_1168_dumage: kitRefraction,                                  // 深池暗影术师 · refraction
  enemy_1168_dumage_2: kitRefraction,                                // 深池暗影术师队长 · refraction
  enemy_1170_dushld: kitRefraction,                                  // 深池重甲卫士 · refraction
  enemy_1170_dushld_2: kitRefraction,                                // 深池重甲卫士队长 · refraction
  enemy_1169_duphlx: kitPhalanx,                                     // 深池方阵步兵 · refraction + DEF +200 per nearby same unit
  enemy_1169_duphlx_2: kitPhalanx,                                   // 深池方阵指挥官 · same
  enemy_1172_dugago: (ab) => [...kitRefraction(ab), statue(ab)],     // 守墓石像 · refraction; melee when blocked; 1st KO → unblockable statue 10 s → arts flyer
  enemy_1172_dugago_2: (ab) => [...kitRefraction(ab), statue(ab)],   // 愤怒的守墓石像 · same
  enemy_1174_duholy: kitHolyGuard,                                   // 深池伙友卫队 · refraction; ASPD-down field next to 影刃 (taunt from data)
  enemy_1174_duholy_2: kitHolyGuard,                                 // 深池伙友卫队精英 · same
  enemy_9011_acrefr: (ab) => [refraction(T(ab, 'Refracting.magic_resistance') ?? 0, T(ab, 'Refracting.max_hp') ?? 0)], // 假想敌：镜膜 · refraction + max HP while active

  // --- FLY 飞行 (motion is engine; abilities)
  enemy_1017_defdrn: (ab) => [enemyAura(T(ab, 'defup.range_radius') ?? 2.5, 'ab:defdrn', { defFlat: T(ab, 'defup.def') ?? 0 })],        // 御4 · DEF aura
  enemy_1355_mrfly: (ab, e) => [enemyAura(e.base.rangeRadius || 2.5, 'ab:mrfly', { resFlat: T(ab, 'magdef_add.magic_resistance') ?? 0 })], // 护障 · RES aura
  enemy_1355_mrfly_2: (ab, e) => [enemyAura(e.base.rangeRadius || 2.5, 'ab:mrfly', { resFlat: T(ab, 'magdef_add.magic_resistance') ?? 0 })], // 护障·P · RES aura
  enemy_1042_frostd: (ab) => [allyAura(T(ab, 'defup.range_radius') ?? 2.5, 'ab:frost', { aspd: (T(ab, 'atkSpeedDown.attack_speed') ?? 0) * 100 })], // 寒霜 · ASPD −50 aura on operators
  enemy_1040_bombd: kitBombd,                                        // 暴鸰 · no normal attack: ONE bomb (target + 8 tiles), then ×2 speed
  enemy_10083_hlbird: kitSelfFear,                                   // “萨科塔之翼” · below half HP: 5 s self-fear, flutters in its tile ×1.5
  enemy_10084_hlegle: kitSteal,                                      // “萨科塔之眼” · fear below half; steals 1 ammo instead of hitting
  enemy_10085_hllevi_2: kitRoar,                                     // “萨科塔昂首” · fear below half; 祈祷邀约 global ASPD −30
  enemy_1407_hummbd: kitExposeOnDeath,                               // 远眺 · death: exposes operators around (damage taken ×1.2)
  enemy_9009_acfort: kitBlackCloud,                                  // 假想敌：黑云 · devours ≤ 3 normal flyers for ammo, fires it all at random allies
  enemy_1112_emppnt: kitShell,                                       // 帝国炮火先兆者 · attacks are shells landing 3 s later (r 1.2)
  enemy_1112_emppnt_2: kitShell,                                     // 帝国炮火中枢先兆者 · same
  enemy_1321_wdarft: (ab) => [skill(ab.sk.BornBugs, (b, e) => spawnChildren(b, e, 'enemy_1269_nhfly', BUGS_PER_CAST))], // 枯朽萃聚使徒 · spawns 枯朽之种
  enemy_1269_nhfly: () => [{                                         // 枯朽之种 · no normal attack: dives onto a nearby operator and self-destructs
    spawn(b, e) { e.profile.noAttack = true; },
    tick(b, e, a, dt) {
      if (a.t && !a.t.alive) { a.t = null; b.removeBuff(e, 'ab:dive'); }
      if (!a.t) {
        const l = targetsNear(b, e, e.base.rangeRadius || 1).sort((p, q) => Math.hypot(p.x - e.x, p.y - e.y) - Math.hypot(q.x - e.x, q.y - e.y));
        if (!l.length) return;
        a.t = l[0];
        b.addBuff(e, { key: 'ab:dive', flags: { noMove: true } });
      }
      if (!stepToward(e, a.t.x, a.t.y, Math.max(e.s.moveSpeed, 0.5) * MOVE_SCALE * dt) && Math.hypot(a.t.x - e.x, a.t.y - e.y) > 0.3) return;
      hurt(b, e, a.t, e.s.atk, 'phys');
      b.fx('explode', { x: e.x, y: e.y, r: 0.5, kind: 'seed' });
      b.kill(e, null);
    },
  }],

  // --- SPECIAL 特异 / others
  enemy_1045_hammer: kitStun3,                                       // 粉碎攻坚手 · every 3rd attack stuns
  enemy_1045_hammer_2: kitStun3,                                     // 粉碎攻坚组长 · same
  enemy_1116_liprr: kitPrisoner(),                                   // 普通囚犯 · confined (ASPD −50) → freed after 4 attacks (ATK +50 %)
  enemy_1116_liprr_2: kitPrisoner(),                                 // 老练囚犯 · same
  enemy_1118_lidbox_2: kitPrisoner(),                                // 拳师囚犯 · + DEF penetration when freed
  enemy_1119_vofsd: kitPrisoner(),                                   // 强壮囚犯 · + RES and regen when freed
  enemy_1121_lifbos: kitPrisoner(true),                              // 重犯 · confined DEF up; first liberation frees every prisoner
  enemy_1121_lifbos_2: kitPrisoner(true),                            // 传奇重犯 · same
  enemy_1072_dlancer: kitRush,                                       // 萨卡兹穿刺手 · accelerates while walking; first hit after block ×speed
  enemy_1320_wdrrl_2: kitFirstAoe,                                   // 萨卡兹悖谬暴虐兵长 · block ≥3 only; first attack splashes
  enemy_1302_ymtro_2: () => [blockWeight(4)],                        // “越长尘” · block ≥4 only (passengers n/a)
  enemy_1329_cbshld: kitDefDecay,                                    // 弧光镜卫 · DEF/RES drop with every damage instance
  enemy_1329_cbshld_2: kitDefDecay,                                  // 弧光镜卫长 · same
  enemy_1249_lysdb_2: (ab) => [{ spawn(b, e, a, ab2) { ab2.hitShield = T(ab, 'Shield.max_block_damage_cnt') ?? 0; } }], // 莱茵生命防卫科高级成员 · blocks one phys/arts hit
  enemy_1402_tgshd_2: kitExposeOnHit,                                // 重装侦察兵 · exposes its attackers 5 s
  enemy_1081_sotisd: (ab) => [taunt(T(ab, 'taunt.taunt_level') ?? 0)], // 游击队盾卫 · taunt +1
  enemy_1427_lrnazg: kitNazg,                                        // “灵幛” · attack hits everyone around it (+ on infection tiles)
  enemy_1422_lrsldr: () => [infectionArts()],                        // 萨卡兹枯朽前锋 · arts attacks on 源石污染区 (infection tiles)
  enemy_1422_lrsldr_2: () => [infectionArts()],                      // 萨卡兹枯朽辟路前锋 · same
  enemy_1425_lrcmra: kitChimera,                                     // 孽罪奇美拉 · activated on infection: arts attacks + pollution aura
  enemy_1425_lrcmra_2: kitChimera,                                   // 渎罪奇美拉 · same
  enemy_1430_lrrook: (ab) => [{                                      // 愧悔魂灵圣杯 · shares damage taken by nearby ground enemies
    spawn(b, e, a) { a.r = T(ab, 'takeDmg.range_radius') ?? 1.7; a.share = T(ab, 'takeDmg.damage_scale') ?? 0; stOf(b).chalices = (stOf(b).chalices ?? 0) + 1; },
    death(c, b) { stOf(b).chalices = Math.max(0, (stOf(b).chalices ?? 1) - 1); },
  }],
  enemy_1025_reveng: (ab) => [lowHpBuff(0.5, { atkPct: T(ab, 'atkup.atk') ?? 0 })],     // 寻仇者 · ATK up below half HP
  enemy_1021_bslime: (ab) => [deathBoom({ scale: T(ab, 'boom.atk_scale') ?? 0 })],       // 高能源石虫 · death: phys blast
  enemy_1067_snslime: (ab, e) => [deathBoom({ scale: T(ab, 'boom.atk_scale') ?? 0, r: (e.def.raw.stats && e.def.raw.stats.rawRangeRadius) || BOOM_RADIUS, status: { key: 'cold', dur: T(ab, 'boom.freeze') ?? 0 } })], // 冰爆源石虫 · death: phys blast + cold
  enemy_1069_icebrk_2: (ab) => [{ hitOut(c, b, e) { if (c.dmg.isAttack && c.target.s.flags.freeze) c.dmg.amount *= T(ab, 'atkup.atk_scale') ?? 1; } }], // 雪怪小队破冰者 · ×3 vs frozen
  enemy_1026_aghost: () => [unblockable()],                          // 幽灵组长 · unblockable
  enemy_1062_rager_2: (ab) => [{ iv: 1, tick(b, e) { const v = T(ab, 'periodic_damage.damage') ?? 0; if (v > 0) b.dealDamage(null, e, periodicDamage(v)); } }], // 狂暴宿主组长 · "自身每秒受到500无来源真实伤害" (damage, not 流失)
  enemy_1183_mlasrt: (ab) => [ep('erosion', T(ab, 'EpDamage.attack@ep_damage_ratio') ?? 0), nthAttackPower(nthOf(ab.sk.PowerAttack), (ab.sk.PowerAttack && ab.sk.PowerAttack.bb.atk_scale) || 1)], // 无胄盟清扫小队 · erosion; every 4th attack ×1.5
  enemy_1273_stmgun_2: (ab) => {                                     // 高准度伦蒂尼姆城防自行炮 · locks the highest max-HP unit in range, bombards the highest HP% on its 9 tiles
    // the allies in its range (the engine's ranged reach: radius + the ally collider)
    const inRange = (b, e) => allTargets(b, e).filter((a) => Math.hypot(a.x - e.x, a.y - e.y) <= (e.base.rangeRadius || 0) + ALLY_COLLIDER_RADIUS + 1e-9);
    return [skill(ab.sk.Cannon, (b, e) => {
      const lock = inRange(b, e).sort((p, q) => q.s.maxHp - p.s.maxHp)[0];
      if (!lock) return;
      const r0 = Math.round(lock.y), c0 = Math.round(lock.x);
      const dur = CANNON_SHOTS * CANNON_EVERY;
      b.fx('telegraph', { x: c0, y: r0, r: 1.5, dur, kind: 'cannon' });
      b.addBuff(e, { key: 'ab:cannon', duration: dur, flags: { noDisplace: true } });
      const ab2 = e.mem.ab;
      const had = new Set(ab2.immune || []);
      ab2.immune = new Set([...had, ...CANNON_IMMUNE]);
      for (let i = 1; i <= CANNON_SHOTS; i++) b.after(i * CANNON_EVERY, () => {
        if (!e.alive) return;
        if (i === CANNON_SHOTS) ab2.immune = had;
        const t = b.allies().filter((a) => canTargetAlly(e, a, true) && Math.abs(Math.round(a.y) - r0) <= 1 && Math.abs(Math.round(a.x) - c0) <= 1)
          .sort((p, q) => q.hpRatio - p.hpRatio)[0];
        if (t) { b.fx('explode', { x: t.x, y: t.y, r: 0.5, kind: 'cannon' }); hurt(b, e, t, e.s.atk * (ab.sk.Cannon.bb.atk_scale ?? 0), 'arts'); }
      }, { owner: e });
    }, { cond: (b, e) => inRange(b, e).length > 0 })];
  },
  // 萨卡兹骸骨拷打者 · heals + ATK stack when a unit within Attack.range_radius is knocked out; leaves 2 血珀 on death — they
  // stay where it fell and wait for a 唤血祭坛 that this mode has none of (inert, not counted)
  enemy_1364_spnaxe_2: (ab) => [{
    death(c, b, e) {
      const key = ab.tS['Summon.enemy_key'], n = T(ab, 'Summon.cnt') ?? 0;
      if (c.reason !== 'killed' || !key || !(n > 0)) return;
      spawnChildren(b, e, key, n, { route: stayRoute(e), countInTotal: false, mods: null });
    },
  }, {
    spawn(b, e) { watchDeaths(b, e); },
    otherDeath(c, b, e) {
      const u = c.unit;
      if (!u || u === e || c.reason !== 'killed' || Math.hypot(u.x - e.x, u.y - e.y) > (T(ab, 'Attack.range_radius') ?? TORTURER_RADIUS) + 1e-9) return;
      b.heal(e, e, e.s.maxHp * (T(ab, 'Attack.hp_ratio') ?? 0), { self: true });
      b.addBuff(e, { key: 'ab:torture', refresh: 'stack', stacks: 1, maxStacks: T(ab, 'Attack.max_stack_cnt') ?? 1, persist: true, mods: { atkPct: T(ab, 'Attack.atk') ?? 0 } });
    },
    hitOut(c, b, e) { if (c.dmg.isAttack && c.target !== e.blockedBy) c.dmg.amount *= T(ab, 'Attack.attack@ranged_atk_scale') ?? 1; },
  }],
  enemy_1501_demonk: () => [maxTargets(2)],                          // 萨卡兹百夫长 · attacks 2 targets
  enemy_10018_sgrobh: () => [maxTargets(2)],                         // “独轮车玩具” · attacks 2 targets
  enemy_2001_duckmi: (ab) => [unblockable(), runWhenHit(T(ab, 'run.attack@move_speed') ?? 0)],   // 鸭爵 · unblockable, no attack; runs +400 % once hurt
  enemy_2001_duckmi_2: (ab) => [unblockable(), runWhenHit(T(ab, 'run.attack@move_speed') ?? 0)], // 鸭爵 (鸭爵 strategy) · same, +300 %
  enemy_10159_mntrjn: () => [unblockable()],                         // 伊利昂的木驮兽 · unblockable (passengers n/a)
  enemy_2009_csaudc: kitEp('neural', 'combat.attack@ep_damage_ratio'), // 骇笑看客 · neural on hit
  enemy_2010_csdcr: (ab) => [ep('neural', T(ab, 'attack.attack@ep_damage_ratio') ?? 0), { // 绯红歌伶 · neural on hit; every 20 hits taken: global enemy ASPD up
    taken(c, b, e, a) {
      a.n = (a.n ?? 0) + 1;
      if (a.n < (T(ab, 'AttackSpeedUp.stack_cnt') ?? Infinity)) return;
      a.n = 0;
      b.fx('telegraph', { x: e.x, y: e.y, r: 99, kind: 'songOfWar', id: e.id });
      for (const o of b.aliveEnemies()) b.addBuff(o, { key: 'ab:songOfWar', duration: T(ab, 'AttackSpeedUp.duration') ?? 0, refresh: 'extend', mods: { aspd: T(ab, 'AttackSpeedUp.attack_speed') ?? 0 }, visible: true });
    },
  }],
  enemy_10001_trslim: (ab) => [skill(ab.sk.StartRun, (b, e) => {    // 简饲源石虫 · below half: runs (faster, unblockable 3 s)
    const s = ab.sk.StartRun.bb;
    b.addBuff(e, { key: 'ab:run', duration: s.block_free_time ?? 0, mods: { moveMul: 1 + (s.move_speed ?? 0) }, flags: { unblockable: true }, visible: true });
  }, { sil: true, cond: (b, e) => e.hpRatio < 0.5 })],
  enemy_10027_vtsk: (ab) => {                                        // “帝国的甲胄” · entrance barrage on the highest-HP unit; ranged ×0.8; 3-hit charge attack
    const ap = ab.sk.Appear, mc = ab.sk.MultiCombat;
    return [{
      spawn(b, e) {
        const n = ap ? ap.bb.times ?? 0 : 0;
        b.after(0.5, () => {
          if (!e.alive || !n) return;
          const lock = allTargets(b, e).sort((p, q) => q.hp - p.hp)[0];
          if (!lock) return;
          b.fx('telegraph', { x: lock.x, y: lock.y, r: 1, kind: 'barrage', id: e.id });
          for (let i = 0; i < n; i++) {
            const t = alliesInTiles(b, lock.tileR, lock.tileC, 'box', 1).sort((p, q) => q.hp - p.hp)[0];
            if (t) hurt(b, e, t, e.s.atk, 'phys');
          }
        }, { owner: e });
      },
      hitOut(c, b, e) { if (c.dmg.isAttack && c.target !== e.blockedBy) c.dmg.amount *= T(ab, 'range.attack@atk_scale_range') ?? 1; },
    }, mc ? {
      cd: mc.cd, icd: mc.icd, fire(b, e) { e.mem.ab.multi = mc.bb.times ?? 1; },
      dealt(c, b, e) {
        const m = e.mem.ab.multi;
        if (!(m > 1)) return;
        e.mem.ab.multi = 0;
        for (let i = 1; i < m; i++) hurt(b, e, c.target, e.s.atk, 'phys');
      },
    } : null];
  },
  enemy_10044_wintun: (ab) => {                                      // 咸鳞汁推荐者 · fast with the barrel; first attack (SILENCE): big hit + buff zone for enemies
    const s = ab.sk.BlockedBoom ? ab.sk.BlockedBoom.bb : {};
    return [{
      sil: true,                                                     // silenced: the barrel is kept (and its speed) until an unsilenced attack
      spawn(b, e) { b.addBuff(e, { key: 'ab:barrel', persist: true, mods: { moveMul: T(ab, '1.move_speed') ?? 1 } }); },
      hitOut(c, b, e, a) { if (!a.done && c.dmg.isAttack) c.dmg.amount *= s.blockee_atk_scale ?? 1; },
      attack(c, b, e, a) {
        if (a.done) return;
        a.done = true;
        b.removeBuff(e, 'ab:barrel');
        const x = e.x, y = e.y, life = s.fixed_duration ?? 0;
        b.fx('zone', { x, y, r: BARREL_RADIUS, dur: life, kind: 'barrel' });
        let left = life;
        const h = b.every(0.5, () => {
          for (const o of b.enemiesInRadius(x, y, BARREL_RADIUS)) auraBuff(b, o, 'ab:barrelZone', 0.5, { aspd: s.attack_speed ?? 0, dodgePhys: s.prob ?? 0 });
          left -= 0.5;
          if (left <= 0) h.cancel();
        });
      },
    }];
  },
  enemy_10045_parrot: kitParrot,                                     // 吉兆飞鳞 · 近地悬浮 (grounded 8 s when stunned); sprints when first hit
  enemy_10087_hlchgr: (ab) => [{                                     // 圣堂剑士 · spends ammo (every 6 s, max 5) for permanent speed/ATK
    iv: T(ab, 'SkillTrigger.interval') ?? 6,
    tick(b, e, a) {
      a.n = (a.n ?? 0) + 1;
      if (a.n > 5) return;
      const s = ab.sk.ForeverEnhance ? ab.sk.ForeverEnhance.bb : {};
      b.addBuff(e, { key: 'ab:enhance', refresh: 'stack', stacks: 1, maxStacks: 5, persist: true, mods: { moveFlat: (s.move_speed_add ?? 0) * e.base.moveSpeed, atkPct: s.atk_add ?? 0 } });
    },
  }],
  enemy_10094_crstf: kitEp('neural', 'ep.ep_damage_ratio'),          // 临时收音师 · neural on hit (filming zones n/a → always)
  enemy_10097_crshd: (ab) => [                                       // 心虚设计师 · neural to its blocker every s; front damage −80 % (faces its walk)
    { iv: 1, tick(b, e) { if (e.blockedBy) elem(b, e, e.blockedBy, 'neural', e.s.atk * (T(ab, 'block.ep_damage_ratio') ?? 0)); } },
    frontGuard(T(ab, 'weakness.damage_resistance') ?? 0, faceMove),  // 减少来自正面的物理/法术伤害 (cameras absent: it never turns)
  ],
  enemy_10098_crhro: (ab) => [ep('neural', T(ab, 'inside.attack@ep_damage_ratio') ?? 0), // 主角阵营角色 · neural on hit; 重生 once (reborn.duration s, full HP)
    reborn({ dur: T(ab, 'reborn.duration') ?? 0, invincible: T(ab, 'reborn.invincible') ?? 0 })],
  enemy_10099_crvln: kitEp('neural', 'inside.attack@ep_damage_ratio'), // 反派阵营角色 · neural on hit
  enemy_10116_ymgtop: (ab) => {                                     // 水遁忍者 · spinning phase (SILENCE): phys AoE every s; 失衡 stops it
    const spin = {
      sil: true, cd: ab.sk.SwitchModeTrigger ? ab.sk.SwitchModeTrigger.cd : 60, icd: ab.sk.SwitchModeTrigger ? ab.sk.SwitchModeTrigger.icd : 10,
      fire(b, e, a) { a.until = b.time + (T(ab, 'EndRotate.rotate_duration') ?? 0); b.fx('telegraph', { x: e.x, y: e.y, r: 1, kind: 'spin', id: e.id }); },
      iv: T(ab, 'RotateDamage.interval') ?? 1,
      tick(b, e, a) { if (!(a.until > b.time)) return; for (const u of b.alliesInRadius(e.x, e.y, T(ab, 'RotateDamage.attack@range_radius') ?? 1)) hurt(b, e, u, e.s.atk * (T(ab, 'RotateDamage.attack@atk_scale') ?? 1), 'phys'); },
    };
    return [spin, unbalanced((b, e) => { if (spin.until > b.time) { spin.until = 0; b.fx('phase', { x: e.x, y: e.y, id: e.id, kind: 'spinStop' }); } })];
  },
  enemy_10118_ymgprc: (ab) => {                                      // 澪 · double hits; 寒晖: every 4th attack (spCost 3) is a ×1.5 double hit
    const scale = (ab.sk.PowerAttack && ab.sk.PowerAttack.bb.atk_scale) || 1;
    const pw = nthAttackPower(nthOf(ab.sk.PowerAttack), scale);
    return [pw, { dealt(c, b, e) { hurt(b, e, c.target, e.s.atk * (pw.power ? scale : 1), 'phys', { isSkill: false }); } }];
  },
  enemy_10127_rkmbst_2: (ab) => [taunt(1), { spawn(b, e) {           // 异质裂兽·α · M0 shield (damage ×0.5, ASPD +100, barrier)
    b.addBuff(e, { key: 'ab:m0', persist: true, visible: true, mods: { dmgTakenMul: 1 - (T(ab, 'M0Shield.damage_resistance') ?? 0), aspd: T(ab, 'M0Shield.attack_speed') ?? 0 } });
    const sh = e.s.maxHp * (T(ab, 'M0Shield.init_shield_hp_ratio') ?? 0);
    if (sh > 0) b.addBuff(e, { key: 'ab:m0barrier', shield: sh, persist: true });
  } }],
  enemy_10156_mncrer: (ab) => [{ sil: true, death(c, b, e) {         // 新手祭司学徒 · death: heals nearby enemies
    if (c.reason !== 'killed') return;
    const r = T(ab, 'Boom.projectile_range') ?? 1, amt = e.s.atk * (T(ab, 'Boom.heal_scale') ?? 0);
    b.fx('explode', { x: e.x, y: e.y, r, kind: 'heal' });
    for (const o of b.enemiesInRadius(e.x, e.y, r)) if (o !== e) b.heal(e, o, amt);
  } }],
  enemy_10162_mnctpt: (ab) => [{                                     // 自制投石机 · 3-hit attacks with small splash
    dealt(c, b, e) {
      const n = T(ab, 'Attack.attack@times') ?? 1, r = T(ab, 'Attack.attack@projectile_range') ?? 0;
      const t = c.target;
      for (let i = 1; i < n; i++) hurt(b, e, t, e.s.atk, 'phys');
      if (r > 0) for (const u of b.alliesInRadius(t.x, t.y, r)) if (u !== t) for (let i = 0; i < n; i++) hurt(b, e, u, e.s.atk, 'phys');
    },
  }],
  enemy_1050_lslime: (ab, e) => kitLeaderMisc('enemy_1050_lslime', ab, e),   // “庞贝” · 4 targets, burning DoT, self-blast when blocked, ASPD up below half
  enemy_1500_skulsr: (ab, e) => kitLeaderMisc('enemy_1500_skulsr', ab, e),   // 碎骨 · unblocked grenades (splash + DEF down); ATK up below half
  enemy_1502_crowns: (ab, e) => kitLeaderMisc('enemy_1502_crowns', ab, e),   // 弑君者 · blinks past its blocker
  enemy_1504_cqbw: (ab, e) => kitLeaderMisc('enemy_1504_cqbw', ab, e),       // W · C4 (2 below half)
  enemy_1509_mousek: (ab, e) => kitLeaderMisc('enemy_1509_mousek', ab, e),   // 鼠王 · opening barrier with DEF up; enrage below half
  enemy_1511_mdrock: (ab, e) => kitLeaderMisc('enemy_1511_mdrock', ab, e),   // 泥岩 · stacking ATK, refreshed barrier (+HP/ASPD while up)
  enemy_1513_dekght: (ab, e) => kitLeaderMisc('enemy_1513_dekght', ab, e),   // 腐败骑士 · plus-shaped hits; rage when 凋零骑士 dies
  enemy_1513_dekght_2: (ab, e) => kitLeaderMisc('enemy_1513_dekght_2', ab, e), // 凋零骑士 · 2 targets; rage when 腐败骑士 dies
  enemy_1539_reid: (ab, e) => kitLeaderMisc('enemy_1539_reid', ab, e),       // “复仇者” · ATK up below half; revives once at 50 %
  enemy_2003_rockman: (ab, e) => kitLeaderMisc('enemy_2003_rockman', ab, e), // 迷路的巨像 · long-stun boulder on a non-stunned unit
  enemy_2004_balloon: (ab, e) => kitLeaderMisc('enemy_2004_balloon', ab, e), // 喷气人 · takes off when blocked: 7 s hovering, unblockable, 失衡免疫
  enemy_2005_axetro: (ab, e) => kitLeaderMisc('enemy_2005_axetro', ab, e),   // “遗弃者” · attack stacks, reset after 4 s idle
  enemy_2008_flking: (ab, e) => kitLeaderMisc('enemy_2008_flking', ab, e),   // “墓碑” · operators' ATK/DEF halved; periodic barrier
  enemy_2048_smgrd: (ab, e) => kitLeaderMisc('enemy_2048_smgrd', ab, e),     // “邪魔的利刃” · 国度 ASPD-down around it, ×2.5 inside
  enemy_2050_smsha: (ab, e) => kitLeaderMisc('enemy_2050_smsha', ab, e),     // 陷落雪祀 · cold + 3-target chain
  enemy_2052_smgia: (ab, e) => kitLeaderMisc('enemy_2052_smgia', ab, e),     // 纠缠藤蔓 · every 3rd attack stuns 15 s; fragile after terrain damage

  // --- multi-form leaders and other bounty (悬赏) targets
  enemy_1512_mcmstr: kitUglyThing,                                   // “巨大的丑东西” · melee ×3; KO ⇒ stun blast, fleeing 大祭司 (true HP loss/s)
  enemy_1516_jakill: kitWarden,                                      // 杰斯顿·威廉姆斯 · ranged arts + multi-stun ⇒ killer form (frees prisoners, armour piercing)
  enemy_1517_xi: kitXi,                                              // “自在” · cross arts, 破桎而出 barrier blast ⇒ form 2 (double hits, 2 crosses)
  enemy_1525_blkswb: kitMace,                                        // 锏 · 抵抗, DEF pen, 速杀 blink, AoE ⇒ form 2 (stealth, double hits, SP clear)
  enemy_1535_wlfmster: kitWolfLord,                                  // 扎罗 · −30 % damage, 溶血骇惧 ⇒ 远古威慑 rebirth ⇒ ranged double hits
  enemy_10081_mpplai: kitTranslator,                                 // 转译基底·α · damage cancelled; 4th phys / 4th arts hit or blocked ⇒ 2 s change ⇒ 寻仇者 / 特战术师 / 幽灵
  enemy_10144_xdelk_2: kitElk,                                       // 乌顶巨角卢鲁 · 角力对决 charge on its blocker (push fails ⇒ damage + stun)
  // 圆仔 · PRTS 天赋 "无法攻击/被阻挡；受到来源于正面的物理和法术伤害-80%；自身始终朝向我方干员数量最多的方向" (no attack: applyWay
  // NONE; its 倒走 / 【炫耀】 is "仅用于演出，无额外效果"): unblockable, faces the bigger crowd, front damage −80 %
  enemy_2085_skzjxd: (ab) => [unblockable(), frontGuard(T(ab, 'Weakness.damage_resistance') ?? 0, faceCrowd)],
  enemy_2085_skzjxd_2: (ab) => [unblockable(), frontGuard(T(ab, 'Weakness.damage_resistance') ?? 0, faceCrowd)], // (鸭爵 strategy) same
  // 失衡 (pushed / pulled by operators)
  enemy_1328_cbjedi: (ab) => [unbalanced((b, e, a, d) => {           // 弧光锋卫 · takes damage in proportion to the distance moved while unbalanced
    // PRTS 修正 "失衡移动时持续受到真实伤害", "处于失衡状态时，每0.066s受到400点无来源真实持续伤害" (伤害分类: 弧光锋卫失衡状态下的自残
    // 伤害 is BUFF damage): damage, not a 流失 (player report D1 audit)
    const v = T(ab, 'unbalanced_bleed.damage') ?? 0, iv = T(ab, 'unbalanced_bleed.interval') ?? 1;
    if (v > 0 && iv > 0) b.dealDamage(null, e, { ...periodicDamage((v * d) / (iv * UNBALANCE_SPEED)), tags: ['dot', 'periodic', 'unbalanced'] });
  })],
  enemy_10112_ymgds: (ab) => [unbalanced((b, e) => {                 // 冒失的小弟 · stunned after being unbalanced
    const st = T(ab, 'StunAfterUnbalance.stun') ?? 0;
    if (st > 0) b.applyStatus(e, 'stun', { duration: st, source: null });
  })],
  enemy_10138_xdsnow: (ab) => [unbalanced((b, e, a) => {             // 雪孩子 · pushed / pulled into high ground ⇒ hitWall.value damage
    const dx = e.x - a.lx, dy = e.y - a.ly, d = Math.hypot(dx, dy);
    if (!(d > 0)) return;
    const r = Math.round(e.y + (dy / d) * 0.6), c = Math.round(e.x + (dx / d) * 0.6);
    if (b.grid.isLow(r, c) && b.grid.groundPassable(r, c)) return;   // stopped by nothing: no collision
    b.fx('explode', { x: e.x, y: e.y, r: 0.4, kind: 'wallHit', id: e.id });
    hurt(b, null, e, T(ab, 'hitWall.value') ?? 0, 'true', { tags: ['wallHit'] });
  })],
  enemy_10141_xdpeng_2: (ab) => [unbalanced((b, e, a) => {           // 拥霜羽兽 · unbalanced once ⇒ drops its egg: faster, unblockable
    if (a.done) return;
    a.done = true;
    b.addBuff(e, { key: 'ab:noEgg', persist: true, visible: true, flags: { unblockable: true }, mods: { moveMul: 1 + (T(ab, 'speed.move_speed') ?? 0) } });
  })],
});

/** Keys deliberately left to their data stats (reason). */
export const STATS_ONLY = Object.freeze({
  enemy_1000_gopro_2: 'plain melee', enemy_1001_bigbo: 'plain leader (bounty)', enemy_1005_yokai: 'FLY, no attack (engine)',
  enemy_1005_yokai_2: 'FLY ranged (engine)', enemy_1005_yokai_3: 'FLY ranged (engine)', enemy_1006_shield: 'heavy defender',
  enemy_1006_shield_2: 'heavy defender', enemy_1006_shield_3: 'heavy defender', enemy_1007_slime: 'plain',
  enemy_1010_demon: 'plain', enemy_1010_demon_2: 'plain', enemy_1041_lazerd: 'FLY arts (engine)', enemy_1041_lazerd_2: 'FLY arts (engine)',
  enemy_1043_zomsbr: 'regen is data (hpRecoveryPerSec 80)', enemy_1061_zomshd: 'regen is data (hpRecoveryPerSec 200)',
  enemy_1046_agent: 'plain', enemy_1071_dftman: 'plain', enemy_1092_mdgint: 'plain (bounty)',
  enemy_1251_lysyta: 'R-series armour interaction absent', enemy_1251_lysyta_2: 'same',
  enemy_1252_lysytb_2: 'same', enemy_1254_lypa_2: 'no listed ability', enemy_1325_cbgpro: 'plain', enemy_1325_cbgpro_2: 'plain',
  enemy_1367_dseed: 'altar pulse absent (骸骨拷打者 leaves them inert, uncounted, in place)',
  enemy_1381_winman: 'plain', enemy_1381_winman_2: 'plain', enemy_1387_winshd: '封冻/供暖器 zones absent', enemy_1415_mmkabi_2: 'chains absent',
  enemy_1433_dsbasi: 'plain', enemy_1433_dsbasi_2: 'plain', enemy_1438_dspred: '赘生甲壳 absent',
  enemy_2002_bearmi: 'plain', enemy_2002_bearmi_2: 'plain',
  enemy_9012_acloon: '炎佑 is a bond summon (bonds.js)', enemy_10040_cnvbln: '狂欢时刻 absent', enemy_10043_sailor: 'bridges/cannons absent',
  enemy_10073_mpcar: 'plain', enemy_10124_uashld_2: 'taunt is data; 矿工游击队 absent',
});

// 圣杯 damage sharing: ground enemies near a living chalice pass `share` of the damage they take to it.
function chaliceShare(b, c) {
  const st = stOf(b);
  if (!(st.chalices > 0)) return;
  const t = c.target;
  if (!t || t.side !== 'enemy' || t.isFlying || c.dmg.cancel || c.dmg.type === 'element' || (c.dmg.tags && c.dmg.tags.includes('chalice'))) return;
  for (const o of b.enemies) {
    if (!o.alive || o === t || o.defId !== 'enemy_1430_lrrook' || !o.mem.ab) continue;
    const a = o.mem.ab.list[0];
    if (!a || !(a.share > 0) || Math.hypot(o.x - t.x, o.y - t.y) > a.r) continue;
    const part = c.dmg.amount * a.share;
    c.dmg.amount -= part;
    // a 无来源 burst's share stays 无来源, credited like the burst (damage.js)
    b.dealDamage(c.dmg.sourceless ? c.credit : c.source, o, { amount: part, type: c.dmg.type, canDodge: false, sourceless: c.dmg.sourceless, tags: [...(c.dmg.tags || []), 'chalice'] });
    break;
  }
}