feedback5 R4: one file per operator kit — kits/tier1..6.js split into kits/ops/<chessId>-<codename>.js (129 kits), kits/shared/tier1..6.js (the helpers two or more kits of a tier use, and each tier's header notes) and kits/index.js (the registry, same keys in the same order); the tier files become re-export shims

Pure move: every line of a kit, of a helper and of the tier headers is copied verbatim (only the headers' first
line names the new file); a helper used by one kit moved into that kit's file. Glue only: the generated imports,
`export default { … }` around each registry entry, `export { … }` lists in shared/tier2..6.js, and tier4's
`(bb, chess, def)` default-argument wrapper as shared/tier4.js `withDefaults` (applied in each tier-4 kit file).
kits/index.js loads every kit file with a guarded dynamic import (browser-safe, no directory listing); tierN.js
re-export the tier registry (TIER_KITS) and their old named exports (tier1 helpers + tinmanKit, tier6
PITHST_ELEMENTS). The merged registry, every tier default and named export have the same keys, order, frozenness
and function sources as before. test/docs-consistency.test.js reads the moved code at its new paths.
Golden: GOLDEN_FULL=1 node --test test/golden.test.js unchanged.

server/sim/content/kits/ops/chess_char_1_15-pithst.js

@@ -0,0 +1,54 @@
+// server/sim/content/kits/ops/chess_char_1_15-pithst.js — 盟约·辅助干员 (char_616_pithst) kit, tier 1 (hidden).
+// Registered with the tier-6 kits, whose conventions are in ../shared/tier6.js; kit contract and rules: ../README.md.
+
+import { hasHp } from '../../../damage.js';
+import { num, tbb, isElite, elementDmg } from '../shared/tier6.js';
+
+// ------------------------------------------------------------------------------------------------------------------
+// 盟约·辅助干员 chess_char_1_15 (巫役) — S1 战术咏唱·双型; 迭代元素
+
+/** 迭代元素's elements in the order they are applied: 神经损伤 "（优先）", then 灼燃损伤, then 凋亡损伤. */
+export const PITHST_ELEMENTS = Object.freeze(['neural', 'burn', 'apoptosis']);
+
+/**
+ * 迭代元素 "攻击同时附带18%攻击力的神经损伤（优先）、灼燃损伤、凋亡损伤；优先攻击未处于损伤爆发的目标":
+ *   * timing = every damage she deals (PRTS 盟约·辅助干员 corrects "攻击同时" to "造成伤害时"): HP damage > 0 — a dodged
+ *     or fully absorbed hit deals none; her own element fills and the bursts they cause never re-trigger it; a killing
+ *     blow attaches nothing (the target is dead — no burst on the corpse);
+ *   * each such damage attaches ep_damage_ratio × ATK of ALL THREE elements, 神经 first, then 灼燃, then 凋亡 (user
+ *     playtest #5 #3: the kit used to pick one element "not bursting" — but a burst's 爆发冷却 locks every gauge of the
+ *     unit, so it only ever filled 神经). PRTS 元素: when one unit applies several elements that would each fill their
+ *     gauge, the element applied first bursts — from her alone 神经 bursts (the "（优先）"), while her 灼燃 / 凋亡 add to
+ *     the gauges the team builds (余, 塑心 …). [ASSUMED: simultaneous application — the reading of the official text]
+ *   * elite module RIT-X "对精英和领袖敌人造成的元素损伤提升18%" = ep_damage_ratio_boss (0.2124) vs ELITE / BOSS enemies:
+ *     a talent ratio, not an "元素损伤提升" (PRTS 备注), so it changes nothing else she deals (e.g. a 灼燃维式重锤).
+ * The target pick prefers enemies not in a burst (`priority: 'notBurst'`).
+ */
+function pithst(bb, chess, def) {
+  const t0 = tbb(def, 0);
+  const ratio = num(t0.ep_damage_ratio);
+  const ratioBoss = num(t0.ep_damage_ratio_boss, ratio);
+  return {
+    skill: {
+      kind: 'duration',
+      mods: { aspd: num(bb.attack_speed) },
+      targeting: { maxTargets: Math.max(1, Math.floor(num(bb['attack@max_target'], 1))) },
+    },
+    trait: { priority: 'notBurst' },
+    install(battle, unit) {
+      if (!(ratio > 0)) return;
+      battle.on('damaged', (ctx) => {
+        const t = ctx.target, d = ctx.dmg;
+        // hasHp: a killing blow attaches nothing (the hook runs before battle.kill, see hasHp)
+        if (ctx.source !== unit || !t || t.side !== 'enemy' || !hasHp(t) || !(ctx.amount > 0)) return;
+        if (ctx.type === 'element' || ctx.type === 'elemental' || (d && d.tags && d.tags.includes('burst'))) return;
+        const amount = unit.s.atk * (isElite(t) ? ratioBoss : ratio);
+        for (const el of PITHST_ELEMENTS) elementDmg(battle, unit, t, el, amount, ['talent', 'pithst']);
+      }, { owner: unit });
+    },
+  };
+}
+
+export default {
+  chess_char_1_15_a: pithst,
+};