feedback5: merge R4 — operator kits one file per chess (kits/ops/*, kits/shared/*, kits/index.js in the old registry order) + kits/README.md with the fidelity checklist; golden unchanged

# Conflicts: # .git-blame-ignore-revs # test/docs-consistency.test.js
2026-10-05 16:30:29 +08:00
commit 6a7a23765a
@@ -9,3 +9,5 @@ b48a67caec5ba0699097e21f3db4d4dbb35a2aed
 13224f9483d94f65089e289ff2be63f50a69b1cb
 # feedback5 R3: server/sim/content/enemies.js → server/sim/content/enemies/*.js (helpers, archetypes, kit families)
 560328cacc863c26d07780096527e255ebf62bc4
+# feedback5 R4: kits/tier1..6.js → kits/ops/ (one file per kit), kits/shared/, kits/index.js
+1169102d46742474bf0f0189d467c791984d9e05
@@ -87,7 +87,9 @@ server/
    snapshot.js            compact serialization for clients
    content/
      index.js             installs all content into a Battle (kits, bonds, garrisons, items, bands, enemies, devices)
-      kits/tier1.js … tier6.js     operator kits (skill + talents) keyed by base chessId
+      kits/index.js        operator kit registry keyed by base chessId (guide: kits/README.md)
+      kits/ops/*.js        one operator kit (skills + talents) per file, <chessId>-<codename>.js
+      kits/shared/*.js     helpers the kits share (shared/tier1.js: the general ones)
      tokens.js            summon/token definitions
      bonds.js             battle side of the 23 bonds
      garrisons.js         battle side (IN_BATTLE) garrison effect keys
@@ -406,7 +408,7 @@ Deterministic-ish heuristic player used for (a) AI teammates, (b) auto-play for

 ## 7. Content modules (server/sim/content + match/effectsMeta handlers)

-Each domain file `server/sim/content/{tokens,bonds,garrisons,items,bands,enemies,bosses,devices,choices}.js` exports `install(battle)` (battle side; called once per Battle by `content/index.js → installContent`) and `registerMeta(registry)` (prep side; called once at server boot by `match/effectsMeta.js`, API documented in `docs/META.md`). Kits live in `content/kits/tier1..6.js` (`export default { [baseChessId]: (bb, chess) => Kit }`). Content must be **data-driven from blackboards** (numbers never hard-coded when a blackboard key exists). Every effect gets at least one unit test in `test/content/*.test.js` using the `test/helpers/battleHarness.js` harness (provided by sim-core).
+Each domain file `server/sim/content/{tokens,bonds,garrisons,items,bands,enemies,bosses,devices,choices}.js` exports `install(battle)` (battle side; called once per Battle by `content/index.js → installContent`) and `registerMeta(registry)` (prep side; called once at server boot by `match/effectsMeta.js`, API documented in `docs/META.md`). Kits live one per file in `content/kits/ops/` (`export default { [baseChessId]: (bb, chess, def) => Kit }`), listed in `content/kits/index.js` (guide: `content/kits/README.md`). Content must be **data-driven from blackboards** (numbers never hard-coded when a blackboard key exists). Every effect gets at least one unit test in `test/content/*.test.js` using the `test/helpers/battleHarness.js` harness (provided by sim-core).

 - kits: all 112 visible chess + hidden ones used by effects (盟约·辅助干员), default skill + talents + trait specifics; tokens.
 - bonds: 23 (battle + meta), exact per-layer formulas from research 02.
@@ -30,7 +30,8 @@ server/sim/
  content/index.js installContent / setupUnitKit / registerAllMeta
  content/enemies/ helpers.js, archetypes.js, one kit file per special type + leaders.js (content/enemies.js builds KITS)
  content/generic.js  generic kit from skill blackboards
-  content/kits/tier1..6.js, content/{tokens,bonds,garrisons,items,bands,enemies,bosses,devices,choices}.js  (content phase)
+  content/kits/index.js + kits/ops/*.js (one operator kit per file) + kits/shared/*.js,
+  content/{tokens,bonds,garrisons,items,bands,enemies,bosses,devices,choices}.js  (content phase)
 ```

 ---
@@ -127,7 +128,7 @@ device or 海嗣 that was not placed never appears (the hidden 待部署区 depl
 流形 still come as their 援军 on a tactical point without a piece (content/tokens.js `tacticalPoint`). Their piece stands
 inside the tactician's attack range — the prep enforces "只能部署在召唤者攻击范围内" (tokens.json `ownerRange`, player
 report #9 after 0.1.0) — and the kits re-use the piece's tile for a re-summoned pack only while it is a free, standable
-tile of her initial range (tier3 `tacticalPoint`, tokens.js `ensureReinforcement`). The start deploy
+tile of her initial range (kits/shared/tier3.js `tacticalPoint`, tokens.js `ensureReinforcement`). The start deploy
 is the user's call after playtest #6 (DESIGN §20); `shared/constants.js SKILL_SUMMON_START_DEPLOY = false` would bring
 back the playtest #4 reading (only with the skill) in the sim and the summon card's hint (docs/PLAYING.md §4 and this
 passage must follow; test/ui/playtest6_summons.test.js checks).
@@ -772,7 +773,7 @@ or guard with a per-unit flag while dealing it. When the guard trips, the logged
 | `getPlayer(playerId)` | `{ playerId, seat, side, colOffset, mirror, dir (default unit direction: RIGHT, mirrored side LEFT), facing (its sign), bonds (live copy, layers updated by addLayers), bandId, playerEffects, lpForBoss, dp, units }` |
 | `mapTile(ps, row, col, abs?)` / `mapDir(ps, dir, abs?)` | board → field tile / direction of a player (the FA right-side mirror) |
 | `addDp(playerId, n)`, `retreat(unit, {reason, permanent})`, `relocate(unit, r, c)` | `relocate` only changes the tile (state kept, no event) |
-| `moveRedeploy(unit, r, c, { clearSp })` | a 【移动】 (PRTS 术语释义: "不退场，以当前血量在目标位置部署", a special retreat + redeploy): `relocate`'s checks (false = refused, nothing changed), then a new deployment (`deploySeq` / `aggroSeq` / `deployedAt`) and `deploy {initial:false, move:true}` (deploy effects fire again); no `die` / `death`, timer or cost (不屈 / 阿戈尔's revive never see it); HP, buffs and a running skill are kept (owner's deviation, DESIGN §22.3); `clearSp` empties the SP before the deploy handlers run — 乌尔比安 S3's move (kits/tier5.js) and 【返回】 (`clearSp`; also the 从不混淆的方向 fallback, content/tokens.js) |
+| `moveRedeploy(unit, r, c, { clearSp })` | a 【移动】 (PRTS 术语释义: "不退场，以当前血量在目标位置部署", a special retreat + redeploy): `relocate`'s checks (false = refused, nothing changed), then a new deployment (`deploySeq` / `aggroSeq` / `deployedAt`) and `deploy {initial:false, move:true}` (deploy effects fire again); no `die` / `death`, timer or cost (不屈 / 阿戈尔's revive never see it); HP, buffs and a running skill are kept (owner's deviation, DESIGN §22.3); `clearSp` empties the SP before the deploy handlers run — 乌尔比安 S3's move (kits/ops/chess_char_5_05-ulpia.js) and 【返回】 (`clearSp`; also the 从不混淆的方向 fallback, content/tokens.js) |
 | `redeploy(unit, { free=true, tile, keepSp })` | immediate (re)deployment of a dead/retreated ally (full HP, `deploy {initial:false}`); `free: false` pays `base.cost` DP (refused without it); without `tile` it lands on the unit's rest tile (`restTile`: where a knocked-out operator lies, else home); `tile: [r, c]` lands on that tile once (home unchanged; refused when off-rect, occupied or a knocked-out operator's tile, no fallback); `keepSp` keeps SP/charges (保留技力), restored before `deploy` fires — 突袭 raids, 阿戈尔 / 不屈 revives where the unit lies |
 | `refreshRange(unit)`, `setExtraRange(unit, keys)`, `rangeChanged(unit)` | rebuild the ranges after changing `unit.rangeGrid` (流形 copies); extra targetable tiles (absolute keys; merged into every later rebuild until set again; `null` clears; never in `baseRangeKeys`): 蕾缪安 wanted, 维娜 S3 |
 | `push(enemy, force, {from, dir, fixed, fixedAngle, inward, effect})`, `pull(enemy, force, {to, center, stop})`, `pullToFront(enemy, unit, force)`, `forceLevel(enemy, force)`, `pushDistance(enemy, force, {effect})` | the official 位移 (PRTS 游戏数据基础 §重量公式 / 推与拉; user playtest #6 item 14): 受力等级 = 力度 (微小力 −1, 小力 0, 中力 1, 较大力 2, 大力 3 …) − current 重量等级 (massLevel, 失重 counts). Push distance per level (`constants.js PUSH_TILES`, PRTS 推与拉's 弹道 column): ≤ −3 → 0, −2 → 0.12, −1 → 0.44, 0 → 1.7, 1 → 2.14, 2 → 2.96, ≥ 3 → 3.53 tiles; `effect` = a 特效 push (`PUSH_TILES_EFFECT`: −2 → 0.085, −1 → 0.374, 0 → 1.562, 1 → 1.987, 2 → 2.773, ≥ 3 → 3.331 — 见行者 S1 / S2, `PUSH_EFFECT_SKILLS`; every other pusher uses the 弹道 column [ASSUMED]); radial (away from `from`; the client's buff template `knockback[relative]`: 莫斯提马 S3, 山 S3, 琳琅诗怀雅 S3 — also PRTS 备注 "推开效果为径向推动") unless `dir` (directional; template `knockback[dir]` = Knockback {`_useSourceDirection` true, `_decreaseForceLevelWhenNotInDirection` 2}: 推击手, 野鬃 S2 "往攻击方向" (charpack char_496_wildmn: buff `wildmn_s_2[force]`) — > 45° off or < 0.25 tile ⇒ radial and level −2; `fixed` waives both (圣聆初雪 S1 朝部署方向, `KnockBackWithCharacterDirection`), `fixedAngle` only the angle (见行者 S2)); `inward` = a push towards `from` (薄绿 S2), stopping at the 急停 radius. Pull: level ≥ 0 → to `to` / the 急停 radius around `center`, −1 → 35 % of the way, −2 → 0.03, ≤ −3 → 0; `pullToFront` aims at the 拉力起点 0.5 tile ahead of the unit with the 急停 radius 0.6708 around it (never moves an enemy the unit itself blocks — nor does a pull towards an ally's centre, e.g. the 流形 S3 pulse) A 静态刚体 (data `staticBody`: every air unit of the mode except “炎佑”, plus 昆图斯 — PRTS 特殊机制 "可以进入失衡状态…但物理层面上无法产生任何速度或移动", "与单位的行动方式无关") moves 0 from every source while the skills that reach it still hit it (薄绿 S2, 锏 S3, the 钩索师 …; player report after 0.1.0) |
@@ -846,7 +847,7 @@ or guard with a per-unit flag while dealing it. When the guard trips, the logged
 ### 7.2 Kits

 ```js
-// server/sim/content/kits/tierN.js
+// server/sim/content/kits/ops/<chessId>-<codename>.js — one kit per file, listed in kits/index.js (kits/README.md)
 export default {
  [baseChessId]: (bb, chess, def) => Kit,   // bb = flattened blackboard of the SELECTED skill (normal Lv4 / elite Lv7)
 };                                           // chess = the record as the unit's loadout makes it (simdata loadoutRecord),
@@ -888,11 +889,11 @@ Element conventions of the kits (user playtest #5 #3; official term dictionary:
  constraint (priority 0 — enemies carry no 损伤屏障).
 - **Element attached to a damage** (a `damaged` hook: 迭代元素, 灼燃维式重锤, 炎佑, 妮芙 S2, 余 S3 火墙): the hook runs before
  `battle.kill`, so a killing blow still sees the target `alive` at 0 HP — these riders check HP left (damage.js `hasHp`,
-  boss: pool HP; tier6 `elementDmg`) and applyElement itself refuses such a target, so nothing bursts on the corpse.
+  boss: pool HP; kits/shared/tier6.js `elementDmg`) and applyElement itself refuses such a target, so nothing bursts on the corpse.
  塑心 S2 (安魂的弥撒) is the exception: PRTS "…凋亡损伤生效于当次触发的伤害之前，该造成的凋亡损伤的来源始终为塑心" — a late
  `hit` handler (priority −1000, after any cancel), so its 凋亡 lands (and may burst) before the damage; a hit dodged or
  absorbed after that still carried it [ASSUMED].
- **盟约·辅助干员 迭代元素** (tier6.js `pithst`): every damage she deals (HP damage > 0; "造成伤害时") attaches `ep_damage_ratio
+- **盟约·辅助干员 迭代元素** (kits/ops/chess_char_1_15-pithst.js `pithst`): every damage she deals (HP damage > 0; "造成伤害时") attaches `ep_damage_ratio
  × ATK` of 神经, then 灼燃, then 凋亡 (`PITHST_ELEMENTS`); the element applied first bursts, so alone she bursts 神经.

 ### 7.3 SkillSpec schema
@@ -1086,7 +1087,7 @@ const bombard = (battle, unit, locks) => {
 };
 ```
 (`blast` emits fx `'bombard'` at (x, y) and deals `proj_atk_scale_1` / `_2` × the cached ATK to every enemy within
-`dist_2`, once each; the full kit is `content/kits/tier6.js lemuen`.)
+`dist_2`, once each; the full kit is `content/kits/ops/chess_char_6_01-lemuen.js`.)

 ---

@@ -332,7 +332,7 @@ The public mirror (ArknightsAssets2 `cn`, `ui/emoticon/theme/[uc]<themeId>/icon/
     - `professions.js` front checks (the `(x − unit.x)·facing` tests)
     - `skills.js` trigger grids
     - `tokens.js` placement grids and Mech/device helpers
-     - kits tier3 (`displace` direction, 薄绿 pull tile) and tier4 device placement
+     - the tier-3 kits (`displace` direction, 薄绿 pull tile) and tier-4 device placement (server/sim/content/kits/ops/)
     - `content/devices.js` blower relation: `equal` if the operator dir == blower dir, `opposite` if reversed, otherwise none. Today only fx is compared, so the DOWN blowers never buff anyone.
     - Items 叙拉古正装 (perpendicular pair), 歌利亚头盔 (front tile), 画卷 `1-1`.
 4. **`server/match/finalAssault.js`.** The right-side mirror becomes col `c→20−c` with dir RIGHT↔LEFT; UP and DOWN are kept (not a flat `facing=−1`). FA prep on the right half shows the mirrored layout, and moves there go through the wheel in mirrored coordinates.
@@ -463,7 +463,7 @@ function fxScene(view, stageId) {
  };
  // `pt` kinds name the shooter in `id` and happen at an enemy's spot; a 'flame' happens at its target
  const posFor = (k, ex) => unitAt(FX_KINDS[k].pt ? [21, 23, 20][i % 3] : FX_KINDS[k].a === 'flame' ? ex.target : ex.id);
-  // 蕾缪安 S3 as the sim plays it (sim/content/kits/tier6.js): a lock every 0.5 s, then after the skill one shell every
+  // 蕾缪安 S3 as the sim plays it (sim/content/kits/ops/chess_char_6_01-lemuen.js): a lock every 0.5 s, then after the skill one shell every
  // 0.3 s on the locks in order, each landing 0.3 s later with its bombard — queued [game time, event]
  const queue = [];
  const lemuenS3 = () => {
@@ -292,7 +292,7 @@ export function tilesAround(x, y, r, tiles) {

 /**
 * Tiles of a straight wall through tile (round(y), round(x)): `axis` 'col' = that column, 'row' = that row (余 S3
- * fire wall: perpendicular to his facing, sim/content/kits/tier6.js). Clipped to the field `rect` (inclusive
+ * fire wall: perpendicular to his facing, sim/content/kits/ops/chess_char_6_03-yu.js). Clipped to the field `rect` (inclusive
 * { r0, r1, c0, c1 }); without one ±4 tiles.
 */
 export function wallTiles(x, y, axis, rect) {
@@ -35,7 +35,7 @@
 //   推与拉 方向力) / 朝部署方向 / 向前 / 身前方向 or for 推击手 (directional), otherwise away from the unit (radial); a skill of
 //   constants.js PUSH_EFFECT_SKILLS (见行者 S1) pushes by PRTS 推与拉's 特效 column. These keywords are only a fallback:
 //   the hand-written kits follow the client's buff templates (knockback[dir] = directional, knockback[relative] = radial),
-//   and the text can mislead — 琳琅诗怀雅 S3's "向前推开" is knockback[relative] (kits/tier3.js). No pool skill pushes
+//   and the text can mislead — 琳琅诗怀雅 S3's "向前推开" is knockback[relative] (kits/ops/chess_char_3_04-swire2.js). No pool skill pushes
 //   through this path with 向前 / 往攻击方向; the only generic push is 见行者 S1, a 推击手.

 import { normalizeSkill } from '../simdata.js';
@@ -1,7 +1,7 @@
 // server/sim/content/index.js — installs all content into a Battle (DESIGN §7).
 //
 // installContent(battle, { mode }) — applies the per-battle loadout data view (simdata withUnitLoadouts; DESIGN §16),
-//   then mode 'full' (default): hand-authored kits (kits/tier1..6) with generic
+//   then mode 'full' (default): hand-authored kits (kits/index.js: one file per kit in kits/ops/) with generic
 //   fallback + every domain module's install(battle); 'generic': generic kits only, no domain modules;
 //   'none': no kits (units never cast skills) and no modules. Every module install runs inside try/catch:
 //   a faulty content module is logged and skipped, never crashing the battle.
@@ -33,13 +33,13 @@ async function safeImport(path) {
  }
 }

-const TIERS = await Promise.all([1, 2, 3, 4, 5, 6].map((t) => safeImport(`./kits/tier${t}.js`)));
+const KIT_REGISTRY = await safeImport('./kits/index.js');
 const DOMAIN_NAMES = ['tokens', 'devices', 'enemies', 'bosses', 'bonds', 'garrisons', 'items', 'bands', 'choices'];
 const DOMAINS = await Promise.all(DOMAIN_NAMES.map((n) => safeImport(`./${n}.js`)));
 const tokens = DOMAINS[0];

-/** Merged kit registry: baseChessId → (bb, chess, def) => Kit */
-export const KITS = Object.freeze(Object.assign({}, ...TIERS.map((m) => (m && m.default && typeof m.default === 'object' ? m.default : {}))));
+/** Merged kit registry: baseChessId → (bb, chess, def) => Kit (kits/index.js; each kit file is loaded guarded too) */
+export const KITS = KIT_REGISTRY.KITS ?? Object.freeze({});

 /** Domain modules in install order: tokens, devices, enemies, bosses, bonds, garrisons, items, bands, choices. */
 export const MODULES = Object.freeze(DOMAIN_NAMES.map((n, i) => [n, DOMAINS[i]]));
@@ -253,7 +253,7 @@ export function revivedInPlace(u) { if (u && u.mem) u.mem.revives = (u.mem.reviv
 * Does `u` hold 坚固维式重锤's 不死 right now — a window started in this deployment that has not run out? The window lives
 * on the unit (`mem.undyingUntil`, `mem.undyingAt`) and a battle-level hook holds it (hammerAcquire), so it outlives the
 * grant that started it — a lend running out mid-window leaves the 不死 for its 8 s [ASSUMED: the 异常效果 outlasts its
- * source] — and ends with the deployment. 信仰搅拌机 S2 steps aside while it holds (kits/tier4.js).
+ * source] — and ends with the deployment. 信仰搅拌机 S2 steps aside while it holds (kits/ops/chess_char_4_01-rmixer.js).
 */
 export function holdsUndying(battle, u) {
  return !!u && u.mem.undyingAt != null && battle.time < u.mem.undyingUntil && u.mem.undyingAt === deploymentOf(u);
@@ -0,0 +1,185 @@
+# Operator kits
+
+A kit is the battle behaviour of one chess (棋子): its skills, talents, trait specifics and module effects, on top of
+the profession defaults of `server/sim/professions.js`. Kits run inside the deterministic battle simulation that the
+server and every browser share, so the same seed and inputs give the same battle everywhere. New kits — the stand-in
+operators, the self-select 6★ operators, contributions from GitHub issue #136 — go here, one file each.
+
+## Layout
+
+| path | what |
+|---|---|
+| `index.js` | the registry: `KIT_FILES` lists every kit file, grouped by tier; `KITS` (base chess id → kit builder) and `TIER_KITS` (one registry per tier group) are built from it |
+| `ops/<chessId>-<codename>.js` | one kit per file, with the helpers and constants only that kit uses |
+| `shared/tier1.js` | the general kit helpers (blackboard readers, unit predicates, hit hooks, area queries, buffs, zones, free tiles, skill records) and the notes of the tier-1 kits |
+| `shared/tier2.js` … `tier6.js` | helpers two or more kits of that tier use, and that tier's notes (conventions, simplifications, fx kinds) |
+| `tier1.js` … `tier6.js` | re-export shims for the old import paths; removed after the 0.2.0 refactor |
+
+`content/index.js` takes `KITS` from `index.js`: a unit's kit is `KITS[def.baseId]` (also the exact or the suffix-less
+id), else the generic kit built from the skill blackboard (`content/generic.js`, docs/SIM.md §7.4).
+
+## Naming
+
+`ops/<base chess id without _a>-<codename>.js`, where the code name is the operator's official `charId` without its
+`char_<n>_` prefix (`data/chess.json` `charId`): `chess_char_3_04_a` (琳琅诗怀雅, `char_1033_swire2`) →
+`ops/chess_char_3_04-swire2.js`.
+
+- The chess id is the registry key and the one unique name: one operator can be two chess (锡人 `chess_char_1_16` and
+  `chess_char_2_19`, 耶拉 3_20 / 4_03, 华法琳 4_26 / 5_04 …), so a code name alone collides. One file ⇔ one registry
+  entry, and a directory listing sorts like the data: by tier, then shop order.
+- The code name finds the operator by name; the docs and the code already call kits by it (`lemuen`, `whitw2`,
+  `sbell2`, `pithst`). It is ASCII and stable across languages — no Unicode file names (the macOS NFD / Windows / URL
+  encoding differences of `/sim/` in the browser) — and the Chinese name is in the file's first line, so
+  `grep -l 玛恩纳 ops/` works too.
+- `-` separates the two parts, which both contain `_`.
+
+## A kit file
+
+```js
+// server/sim/content/kits/ops/chess_char_6_21-codename.js — 名字 (char_xxxx_codename) kit, tier 6.
+// Conventions of the tier-6 kits: ../shared/tier6.js; kit contract and rules: ../README.md.
+
+import { num, talentBb, statBuff } from '../shared/tier1.js';     // shared helpers, engine modules (relative paths)
+
+/** 名字 S2 "…": the radius exists only in the PRTS 备注 (no blackboard key). */
+const SOME_RADIUS = 1.5;                                          // helpers / constants of this kit only
+
+export default {
+  // 6_21 名字 — S3 …: what each skill / talent / module does, which blackboard key gives each number, [ASSUMED] where
+  // no source says.
+  chess_char_6_21_a: (bb, chess, def) => ({ skill: { … }, skills: { … }, talents: [ … ], trait: { … }, install() {} }),
+};
+```
+
+- **The default export** is `{ [baseChessId]: (bb, chess, def) => Kit }` with exactly one key, the `_a` id; the same kit
+  serves the elite `_b` record. `bb` = the SELECTED skill's blackboard at the chess's level (normal Lv4, elite Lv7),
+  `chess` = the record as the unit's loadout makes it (talents, `trait.bb`, `module`), `def` = the normalised def. The
+  Kit fields (`skill`, `skills: { [skillId]: SkillSpec }`, `talents`, `trait`, `install`) and how the loader picks the
+  selected skill's spec: docs/SIM.md §7.2; the SkillSpec schema: §7.3; worked examples with real operators: §7.5.
+- Small real files to start from: `ops/chess_char_1_11-skgoat.js`, `ops/chess_char_1_02-yak.js`; one with every
+  selectable skill: `ops/chess_char_3_04-swire2.js`; a large one with its own helpers: `ops/chess_char_6_18-whitw2.js`.
+- The tier-4 files wrap their entry in `withDefaults(…)` (`shared/tier4.js`: it rebuilds `def` for callers that pass
+  `(bb, chess)` only); `content/index.js` always passes all three, so a new kit needs no wrapper.
+
+## What a kit may use
+
+- **Helpers**: `../shared/tier1.js` first — `num` / `talentBb` / `talentGrid` / `moduleBb` / `traitBb` / `moduleOn`,
+  `skillRec` / `skillBbOf` (another selectable skill's record and blackboard), `instantKind`, `batMod`, `up` / `cheb`,
+  `onHitBy` / `onHitOn` / `onDamagedOn`, `enemiesInGrid` / `alliesInGridOf` / `enemyInRange`, `statBuff` / `toggleBuff`
+  / `installAura` / `spTimeBonus` / `installReveal`, `makeZone`, `freeTileAround`, `giveSp`, `once`. The other
+  `../shared/tierN.js` are usable too, but same-named helpers are not interchangeable: `num` of tier 1 / 4 also reads
+  numeric strings, those of tiers 3 / 5 / 6 do not; `toggleBuff`, `talentBb`, `moduleBb`, `instantKind` take different
+  arguments per tier. Read the helper before using it.
+- **The battle API** documented in docs/SIM.md: units (§2), buffs / mods / statuses (§3), the damage & heal pipeline
+  (§4), the hook bus and its re-entrancy rule (§5), the engine helpers content must use (§6), the skill runtime (§7.1);
+  engine modules by relative path (`../../../constants.js`, `targeting.js`, `body.js` for huge enemies, `dir.js` for
+  facing, `damage.js` `hasHp` / `isHpLoss` / `mitigate`, `buffs.js`, `simdata.js` `normalizeChess`); content modules
+  (`../../tokens.js` summons, `../../items/battle.js`).
+- **Never**: Node-only modules (`node:*`, `server/sim/nodeData.js`) or anything of `server/match`, `server/net`,
+  `public/` — the sim is served to browsers as-is (`/sim/`, no bundler); `Math.random`, `Date.now`, timers — use
+  `battle.rng()` (`rng.int / range / chance / pick / shuffle / weighted`), `battle.after` / `battle.every`; state kept
+  across battles in module variables — key it by battle (`WeakMap`) or keep it in `unit.mem`; mutating `bb`, `def`,
+  `chess` or range grids (deep-frozen, shared by every battle: copy them). Register hooks with `{ owner: unit }` and
+  check `unit.alive` in handlers. `test/content/kits_layout.test.js` enforces the import / clock rules.
+- Order matters: hooks run by priority, then registration order, and every random draw comes from one stream — the
+  golden corpus (`test/golden/`) notices any change in either.
+
+## Registering a kit
+
+1. The chess needs its data record first: `data/chess.json` is generated from the official tables by
+   `tools/build-data.mjs` (docs/DATA.md) — skills, talents, trait, modules, ranges, tokens and the resolved auto-cast
+   trigger of every skill.
+2. Add the kit file to `ops/`, named as above.
+3. Append its file name to its tier's group in `index.js` `KIT_FILES` (never reorder the existing entries). Each file
+   is loaded with a guarded dynamic import: a file that fails to load is logged and its chess falls back to the
+   generic kit, so check the server log when a kit seems to do nothing.
+4. `node --test test/content/kits_layout.test.js` checks the name, the registry entry and the imports;
+   `node tools/kit-coverage.mjs --missing` lists selectable skills that still fall back to the generic spec.
+
+## Testing a kit
+
+- The harness is `test/helpers/battleHarness.js` (`makeBattle`, `runUntil`, `hooksOf`, `eventsOf`, `checkInvariants`;
+  docs/SIM.md §10 has an example and every option). Seed everything, use synthetic `enemyRec` targets for exact
+  numbers, assert on ids, end with `checkInvariants(h.b)`.
+- Patterns: `test/content/kits_t1t2.test.js` … `kits_t6.test.js` (the default skill and the talents of every chess),
+  `test/content/kits_alt_t1.test.js` … `kits_alt_t6.test.js` (every selectable non-default skill and every module;
+  `kits_alt_t4.test.js` also runs every chess × skill × module against a mixed wave),
+  `test/content/feedback1b_kits.test.js` (real-match checks).
+  A new kit gets its own test file (for example `test/content/kits_<codename>.test.js`).
+- Golden results: a new or changed kit moves the digests of the scenarios that field its chess. Run
+  `npm run golden:update` and commit `test/golden/*.json` in the same change, saying which scenarios moved and why
+  (`test/golden/README.md`). A refactor never changes them.
+- Run `node --test test/content/kits_layout.test.js test/golden.test.js <your test file>`, then
+  `GOLDEN_FULL=1 node --test test/golden.test.js` before the pull request.
+
+## The fidelity rule
+
+Every official skill, talent and module is implemented exactly as the game has it — no approximation.
+
+- Sources: the official tables (`.cache/gamedata/excel/*.json`, which `tools/build-data.mjs` downloads: character_table,
+  skill_table, battle_equip_table / uniequip_table, activity_table → act2autochess) as built into `data/chess.json`;
+  PRTS (prts.wiki: the operator page, its 备注, 卫戍协议 pages) for mechanics the data does not carry — cite it.
+- Numbers come from the blackboards whenever a key exists; a number that only exists in the text is parsed from it
+  (with a fallback) or a named constant with its source in the comment.
+- When the text and the blackboard seem to disagree, find out what the game does and say so in the comment (DESIGN
+  §19.9: 至简's text says 购买价格为1 while `bb.price` is 2 — the blackboard is the discount off the tier price 3).
+- If the engine cannot express a mechanic, extend the engine in a reviewed change of its own instead of faking it.
+- Anything no source backs is marked `[ASSUMED]` in the comment and in the pull request; a decision of the owner is
+  cited as "owner's decision YYYY-MM-DD".
+
+## Fidelity checklist (one per operator)
+
+Each item is a mistake this project already made once. Tick every one for every operator in the pull request.
+
+- [ ] **1. Skills** — every effect of each skill at the level the chess uses (normal Lv4, elite Lv7: the skill_table
+  blackboard and the text, reconciled), durations, charges, ammo, SP type (time / attack / hit) and initial SP (the
+  data's `spType`, `initSp`; SkillSpec overrides need a reason). Examples: ammo — 隐现 `ops/chess_char_1_01-inside.js`,
+  `kits_t1t2.test.js` "1_01 隐现: ammo skill"; charges — 松果 S1, `kits_alt_t3.test.js` "3_10 松果 S1 RMA长钉 (charges)";
+  hit SP — `feedback1d-solvent.test.js` (the drain feeds 受击回复 SP).
+- [ ] **2. Talents** — every talent at the chess's level / potential (the talent blackboards), conditional ones too.
+  Example: `kits_t1t2.test.js` "1_01 隐现 elite: +self_ammo after `duration` s on field; a random other 【拉特兰】 ammo
+  operator +ally_ammo".
+- [ ] **3. Modules** — for every module the chess offers (loadout, DESIGN §16): the trait override
+  (battle_equip_table `overrideTraitDataBundle`, the trait text), the talent changes (`addOrOverrideTalentDataBundle`)
+  and the stat bonuses (`attributeBlackboard`); `chess` is already the loadout-resolved record. Examples:
+  `kits_alt_t4.test.js` "信仰搅拌机 modules: SPT-Y 老朋友 = range +1 …" and "莫斯提马 SPC-X: the range becomes the module
+  grid …", and its "every chess × selectable skill × module" run.
+- [ ] **4. Attack range** — the base range, the range while a skill that changes it is on, and back when it ends; a
+  skill's own 技能范围. Examples: 烛煌 S3, `test/sim/feedback1e-skillrange.test.js`; DESIGN §21.16 (the live range on the
+  card); 见行者 / 松果, `kits_t3.test.js` ("fires on an enemy inside the skill range only").
+- [ ] **5. Auto-cast trigger** — the data resolves it (`tools/build-data.mjs resolveTrigger`, `data/chess.json`
+  `skills[].trigger`); check it, and change the data rule rather than hand-coding a trigger in the kit. The owner's
+  rules (0.2.0): a skill whose attack range is larger than the normal one casts as soon as an enemy is inside the
+  SKILL range (a deliberate deviation from the official 技能策略, like the 重装 exception; existing kits that predate
+  the rule, such as 烛煌 S3 in `feedback1e-skillrange.test.js`, are not examples of it); an AUTO skill that acts on
+  allies or itself fires at full SP (引星棘刺 S1, `kits_alt_t5.test.js` "… fires as soon as its SP is full, no enemy
+  needed (GitHub #124)"); the 重装 exception list (`TRIGGER_DEVIATIONS`: 深巡 S2, 雷蛇 S2, 号角 S2 / S3, 灰毫 S1 / S2,
+  余 S2; the 预备干员-重装 / Mechanist stand-ins join it), DESIGN §21.29 / §22.10,
+  `test/sim/feedback1-tank-triggers.test.js`.
+- [ ] **6. Targeting** — can it hit air units (`canHitFly`), ground-only attacks, block count, target priority; can
+  ground enemies hit it (起飞 / 对地规避, stealth, camouflage flags). Examples: `test/sim/professions.test.js` "fortress
+  (号角 / 灰毫) is ground-only and never fires at FLY enemies" (DESIGN §22.13); `feedback1b_kits.test.js` "B4 玛恩纳 S3 …
+  hits the air units" vs "S1 / S2 … stay ground-only"; 蒂比 `ops/chess_char_2_13-tippi.js` (`LIFTOFF_FLAGS`, DESIGN
+  §21.22); `kits_t3.test.js` "忍冬 迷彩: … ranged enemies stop targeting her".
+- [ ] **7. Damage typing** — physical / arts / true / element (元素损伤 vs 元素伤害: docs/SIM.md §7.2), splash vs
+  normal (普通伤害), dodgeable or not, `isSkill`, and what triggers on-hit effects (a trait that heals on any damage
+  dealt, e.g. 咒愈师). Examples: `enemies_bosses.test.js` "its attack splash (法术普通伤害) can be dodged; its death blast
+  (法术溅射伤害) cannot"; DESIGN §23.29 (叙拉古 rolls on every 普通伤害 hit); `test/sim/professions.test.js` "incantation
+  medics heal an ally for 50 % of damage dealt"; the re-entrancy rule of docs/SIM.md §5.
+- [ ] **8. Summons / tokens** — placement rules (the owner's range, deployable tiles), redeploy, what they inherit from
+  the owner's skill / module (`data/tokens.json` variants, `battle.tokenDef`). Examples:
+  `test/match/feedback1-placement.test.js` "#9 data: 狼群 and 流形 are owner-range summons" (DESIGN §20.1, §21.3);
+  `test/content/playtest6_summons.test.js`, `tokens_summons.test.js`; `feedback1b_kits.test.js` "B3 维娜·维多利亚 S3".
+- [ ] **9. Status effects** — every status applied, with its official duration and stacking (寒冷 on 寒冷 ⇒ 冻结 for the
+  longer cold, 沉默 removes abilities, 恐惧, 睡眠, 浮空 …; "同名效果取最高" = `applyStrongest`). Examples:
+  `test/sim/combat.test.js` "cold on cold ⇒ freeze for the longer cold …", "sleep: target is untargetable and
+  inactive; fear stops enemy attacks", "statuses: sleep = invulnerable except `hitSleep` attackers; levitate …";
+  `enemies_bosses.test.js` "沉默: exactly the abilities whose handbook line is SILENCE-flagged can be silenced".
+- [ ] **10. Tests** — at least one per skill and per talent, plus the trigger rule, the range toggle, anti-air and
+  every module; the golden files updated in the same pull request (an intended change).
+
+## Old references
+
+DESIGN, the changelog and issues cite kits as `kits/tierN.js <name>` (before 0.2.0). That kit is now
+`ops/<chess id>-<codename>.js` — search `ops/` for the chess id, the code name or the Chinese name — and the helpers of
+that file are in `shared/tierN.js`.
@@ -0,0 +1,72 @@
+// server/sim/content/kits/index.js — the operator kit registry (DESIGN §7, docs/SIM.md §7.2): baseChessId →
+// (bb, chess, def) => Kit. One file per kit in ops/ (README.md: what a kit file holds, naming, registration, tests).
+//
+// KIT_FILES lists every kit file, grouped by tier — the former kits/tier1.js … tier6.js, each group in that file's
+// order — so the merged registry keeps the key order it always had (content/index.js resolves kits by id; the tier
+// shims, tools/kit-coverage.mjs and the golden corpus see the same registry as before). A new kit file is appended to
+// its tier's group.
+// Each file is loaded with a guarded dynamic import, so this runs unchanged in the browser (/sim/, no Node-only
+// module, no directory listing): a file that fails to load (syntax error, throwing top-level code, missing file) is
+// logged and skipped — its chess falls back to the generic kit — instead of breaking the server or the page.
+
+export const KIT_FILES = Object.freeze([
+  // tier 1
+  ['chess_char_1_01-inside.js', 'chess_char_1_02-yak.js', 'chess_char_1_03-leizi.js', 'chess_char_1_04-udflow.js',
+    'chess_char_1_05-vigna.js', 'chess_char_1_06-vendla.js', 'chess_char_1_07-prove.js', 'chess_char_1_08-texas.js',
+    'chess_char_1_09-caper.js', 'chess_char_1_10-sunbr.js', 'chess_char_1_11-skgoat.js', 'chess_char_1_12-estell.js',
+    'chess_char_1_13-podego.js', 'chess_char_1_14-greyy.js', 'chess_char_1_16-tinman.js', 'chess_char_1_17-indigo.js',
+    'chess_char_1_18-utage.js', 'chess_char_1_19-wildmn.js', 'chess_char_1_20-liskam.js'],
+  // tier 2
+  ['chess_char_2_01-excu.js', 'chess_char_2_02-silent.js', 'chess_char_2_03-slchan.js', 'chess_char_2_04-grabds.js',
+    'chess_char_2_05-harold.js', 'chess_char_2_06-papyrs.js', 'chess_char_2_07-ghost.js', 'chess_char_2_08-bubble.js',
+    'chess_char_2_09-humus.js', 'chess_char_2_10-rockr.js', 'chess_char_2_11-kazema.js', 'chess_char_2_12-gravel.js',
+    'chess_char_2_13-tippi.js', 'chess_char_2_14-flower.js', 'chess_char_2_15-akkord.js', 'chess_char_2_16-whitew.js',
+    'chess_char_2_17-branch.js', 'chess_char_2_18-ashlok.js', 'chess_char_2_19-tinman.js'],
+  // tier 3
+  ['chess_char_3_01-angel.js', 'chess_char_3_02-ayer.js', 'chess_char_3_03-swire.js', 'chess_char_3_04-swire2.js',
+    'chess_char_3_05-skadi.js', 'chess_char_3_06-philae.js', 'chess_char_3_07-forcer.js', 'chess_char_3_08-mint.js',
+    'chess_char_3_09-haini.js', 'chess_char_3_10-pinecn.js', 'chess_char_3_11-snhunt.js', 'chess_char_3_12-blemsh.js',
+    'chess_char_3_13-malist.js', 'chess_char_3_14-slbell.js', 'chess_char_3_15-vodfox.js', 'chess_char_3_16-snakek.js',
+    'chess_char_3_17-shotst.js', 'chess_char_3_18-vulpis.js', 'chess_char_3_19-vigil.js', 'chess_char_3_20-kjera.js',
+    'chess_char_3_21-archet.js'],
+  // tier 4
+  ['chess_char_4_01-rmixer.js', 'chess_char_4_02-mostma.js', 'chess_char_4_03-kjera.js', 'chess_char_4_04-ines.js',
+    'chess_char_4_05-beewax.js', 'chess_char_4_06-kroos2.js', 'chess_char_4_07-bpipe.js', 'chess_char_4_08-rosesa.js',
+    'chess_char_4_09-mizuki.js', 'chess_char_4_10-aroma.js', 'chess_char_4_11-cathy.js', 'chess_char_4_12-glady.js',
+    'chess_char_4_13-gnosis.js', 'chess_char_4_14-lionhd.js', 'chess_char_4_15-reckpr.js', 'chess_char_4_16-texas2.js',
+    'chess_char_4_17-hsguma.js', 'chess_char_4_18-mudrok.js', 'chess_char_4_19-flamtl.js', 'chess_char_4_20-fartth.js',
+    'chess_char_4_21-plosis.js', 'chess_char_4_22-svrash.js', 'chess_char_4_23-gvial2.js', 'chess_char_4_24-billro.js',
+    'chess_char_4_25-cetsyr.js', 'chess_char_4_26-bldsk.js'],
+  // tier 5
+  ['chess_char_5_01-excu2.js', 'chess_char_5_02-titi.js', 'chess_char_5_03-blaze2.js', 'chess_char_5_04-bldsk.js',
+    'chess_char_5_05-ulpia.js', 'chess_char_5_06-etlchi.js', 'chess_char_5_07-surtr.js', 'chess_char_5_08-horn.js',
+    'chess_char_5_09-cetsyr.js', 'chess_char_5_10-lisa.js', 'chess_char_5_11-demkni.js', 'chess_char_5_12-dusk.js',
+    'chess_char_5_13-ghost2.js', 'chess_char_5_14-svash2.js', 'chess_char_5_15-thorn2.js', 'chess_char_5_16-plosis.js',
+    'chess_char_5_17-f12yin.js', 'chess_char_5_18-gvial2.js', 'chess_char_5_19-mlynar.js', 'chess_char_5_20-aglina.js',
+    'chess_char_5_21-sntlla.js', 'chess_char_5_22-nymph.js', 'chess_char_5_23-reckpr.js'],
+  // tier 6 (and 盟约·辅助干员 chess_char_1_15, a hidden tier-1 chess always registered with the tier-6 kits)
+  ['chess_char_1_15-pithst.js', 'chess_char_6_01-lemuen.js', 'chess_char_6_02-sbell2.js', 'chess_char_6_03-yu.js',
+    'chess_char_6_04-skadi2.js', 'chess_char_6_05-pasngr.js', 'chess_char_6_06-pepe.js', 'chess_char_6_07-siege2.js',
+    'chess_char_6_08-reed2.js', 'chess_char_6_09-cello.js', 'chess_char_6_10-nymph.js', 'chess_char_6_11-mlyss.js',
+    'chess_char_6_12-rosmon.js', 'chess_char_6_13-angel2.js', 'chess_char_6_14-lumen.js', 'chess_char_6_15-qiubai.js',
+    'chess_char_6_16-halo2.js', 'chess_char_6_17-nearl2.js', 'chess_char_6_18-whitw2.js', 'chess_char_6_19-blkkgt.js',
+    'chess_char_6_20-agoat2.js'],
+].map((group) => Object.freeze(group)));
+
+async function loadKitFile(file) {
+  try {
+    return await import(`./ops/${file}`);
+  } catch (e) {
+    console.error(`[content] failed to load kits/ops/${file}: ${e && e.stack ? e.stack.split('\n').slice(0, 3).join(' | ') : e}`);
+    return {};
+  }
+}
+
+const MODULES = await Promise.all(KIT_FILES.map((group) => Promise.all(group.map(loadKitFile))));
+const registryOf = (m) => (m && m.default && typeof m.default === 'object' ? m.default : {});
+
+/** The registry of each tier group (index 0 = tier 1): baseChessId → kit builder, in KIT_FILES order. */
+export const TIER_KITS = Object.freeze(MODULES.map((group) => Object.assign({}, ...group.map(registryOf))));
+
+/** The merged kit registry: baseChessId → (bb, chess, def) => Kit, tier 1 … tier 6. */
+export const KITS = Object.freeze(Object.assign({}, ...TIER_KITS));
@@ -0,0 +1,61 @@
+// server/sim/content/kits/ops/chess_char_1_01-inside.js — 隐现 (char_498_inside) kit, tier 1.
+// Conventions of the tier-1 kits: ../shared/tier1.js; kit contract and rules: ../README.md.
+
+import { num, talentBb, up, once, skillBbOf, batMod } from '../shared/tier1.js';
+
+export default {
+  // ---------------------------------------------------------------------------------------------------------------
+  // 1_01 隐现 “解决麻烦”: ammo (attack@trigger_time) ATK+atk, base attack time +base_attack_time s, prefers ranged
+  // enemies, taunt −1. 火力支援: after `duration` s on the field own ammo +self_ammo (from the next cast); elite: another
+  // random 【拉特兰】 op's ammo +ally_ammo while that deployment lasts (one grant per source).
+  // Alternate S1 “不惹麻烦” (AUTO, attack SP): attack@trigger_time rounds of attack@atk_scale × ATK physical (an ammo
+  // skill, so 火力支援's larger magazine applies to it too).
+  chess_char_1_01_a: (bb, chess, def) => {
+    const t = talentBb(chess, 0);
+    const dur = num(t.duration), selfAmmo = num(t.self_ammo), allyAmmo = num(t.ally_ammo);
+    const s1 = skillBbOf(chess, 'skchr_inside_1');
+    return {
+      skill: {
+        kind: 'ammo', ammo: num(bb['attack@trigger_time'], 1),
+        mods: { atkPct: num(bb.atk), batPct: batMod(bb.base_attack_time, chess, def?.skill?.description ?? chess?.skill?.desc), taunt: -1 },
+        targeting: { priority: 'ranged' },
+      },
+      skills: {
+        skchr_inside_1: { kind: 'ammo', ammo: Math.max(1, Math.floor(num(s1['attack@trigger_time'], 4))), attack: { atkScale: num(s1['attack@atk_scale'], 1) } },
+      },
+      talents: [{ install(battle, unit) {
+        const onField = () => up(unit) && battle.time - unit.deployedAt + 1e-9 >= dur;
+        battle.on('skillStart', ({ unit: u, skill }) => {
+          if (u === unit && skill.kind === 'ammo' && onField() && selfAmmo > 0) skill.addAmmo(selfAmmo);
+        }, { owner: unit });
+        if (!(allyAmmo > 0)) return;
+        // elite: once per deployment, `duration` s after it, one random other 【拉特兰】 operator with an ammo skill gets
+        // +ally_ammo for as long as this deployment lasts (one grant per source — redeploying never stacks it)
+        battle.on('deploy', ({ unit: u }) => {
+          if (u !== unit) return;
+          const seq = unit.deploySeq;
+          battle.after(dur, () => {
+            // (the larger magazine applies from the next activation: a running skill keeps its rounds)
+            if (!up(unit) || unit.deploySeq !== seq) return;
+            const pool = battle.allyUnits.filter((a) => a !== unit && a.kind === 'op' && a.ownerId === unit.ownerId && a.alive
+              && (a.def.bonds || []).includes('lateranoShip') && a.skill && a.skill.kind === 'ammo');
+            const pick = battle.rng.pick(pool);
+            if (!pick) return;
+            (pick.mem.insiderAmmo ??= new Map()).set(unit.id, { src: unit, seq, n: allyAmmo });
+            battle.fx('buff', { x: pick.x, y: pick.y, id: pick.id, kind: 'ammo' });
+          }, { owner: unit });
+        }, { owner: unit });
+        once(battle, 'insider:bonusAmmo', () => battle.on('skillStart', ({ unit: u, skill }) => {
+          const m = u.mem.insiderAmmo;
+          if (!m || skill.kind !== 'ammo') return;
+          let n = 0;
+          for (const [k, g] of m) {
+            if (up(g.src) && g.src.deploySeq === g.seq) n += g.n;
+            else m.delete(k);
+          }
+          if (n > 0) skill.addAmmo(n);
+        }));
+      } }],
+    };
+  },
+};
@@ -0,0 +1,19 @@
+// server/sim/content/kits/ops/chess_char_1_02-yak.js — 角峰 (char_199_yak) kit, tier 1.
+// Conventions of the tier-1 kits: ../shared/tier1.js; kit contract and rules: ../README.md.
+
+import { num, talentBb, statBuff, skillBbOf } from '../shared/tier1.js';
+
+export default {
+  // ---------------------------------------------------------------------------------------------------------------
+  // 1_02 角峰 抗寒体质: HP +max_hp, DEF +def, RES ×(1+magic_resistance). 雪原卫士: RES +magic_resistance (flat).
+  // Alternate S1 体能强化 (重装 ⇒ TAKE_DAMAGE trigger from data): HP +max_hp, +hp_recovery_per_sec HP per second
+  // (the 生命回复速度 attribute). Elite module PRO-Y (block 4) is a stat of the module (attr blockCnt).
+  chess_char_1_02_a: (bb, chess) => {
+    const s1 = skillBbOf(chess, 'skchr_yak_1');
+    return {
+      skill: { kind: 'duration', mods: { hpPct: num(bb.max_hp), defPct: num(bb.def), resMul: 1 + num(bb.magic_resistance) } },
+      skills: { skchr_yak_1: { kind: 'duration', mods: { hpPct: num(s1.max_hp), hpRegen: num(s1.hp_recovery_per_sec) } } },
+      talents: [{ install(battle, unit) { statBuff(battle, unit, 'talent:yak', { resFlat: num(talentBb(chess, 0).magic_resistance) }); } }],
+    };
+  },
+};
@@ -0,0 +1,27 @@
+// server/sim/content/kits/ops/chess_char_1_03-leizi.js — 惊蛰 (char_306_leizi) kit, tier 1.
+// Conventions of the tier-1 kits: ../shared/tier1.js; kit contract and rules: ../README.md.
+
+import { CHAIN_RADIUS } from '../../../constants.js';
+import { num, talentBb, traitBb, onHitBy, skillBbOf } from '../shared/tier1.js';
+
+export default {
+  // ---------------------------------------------------------------------------------------------------------------
+  // 1_03 惊蛰 初雷: ATK +atk, chain jumps lose no damage. 通流无阻: vs unblocked enemies ATK ×atk_scale (every jump).
+  // Alternate S1 攻击力强化·γ型: ATK +atk (the chain keeps its falloff). Elite module CHA-X (4 jumps, −10 %, 0.8 s 停顿)
+  // is the chain profile of the module trait (professions.js TUNE.chain).
+  chess_char_1_03_a: (bb, chess) => {
+    const scale = num(talentBb(chess, 0).atk_scale, 1);
+    return {
+      skill: { kind: 'duration', mods: { atkPct: num(bb.atk) }, attack: {} },
+      skills: { 'skcom_atk_up[3]': { kind: 'duration', mods: { atkPct: num(skillBbOf(chess, 'skcom_atk_up[3]').atk) } } },
+      talents: [{ install(battle, unit) {
+        if (scale !== 1) onHitBy(battle, unit, ({ target, dmg }) => { if (dmg.isAttack && !target.blockedBy) dmg.amount *= scale; });
+      } }],
+      install(battle, unit) {
+        // the chain shape (count / sluggish, elite module included) comes from the resolved chain profile
+        const ch = unit.profile.chain || { count: num(traitBb(chess)['attack@max_target'], 3), radius: CHAIN_RADIUS, sluggish: num(traitBb(chess)['attack@sluggish'], 0.5) };
+        if (unit.skill && unit.skill.spec.attack) unit.skill.spec.attack.chain = { ...ch, falloff: 0 };
+      },
+    };
+  },
+};
@@ -0,0 +1,45 @@
+// server/sim/content/kits/ops/chess_char_1_04-udflow.js — 深巡 (char_4137_udflow) kit, tier 1.
+// Conventions of the tier-1 kits: ../shared/tier1.js; kit contract and rules: ../README.md.
+
+import { num, talentBb, moduleOn, installReveal, skillBbOf } from '../shared/tier1.js';
+
+export default {
+  // ---------------------------------------------------------------------------------------------------------------
+  // 1_04 深巡 行动能力剥夺: longer line range (skill grid), ATK +atk, ASPD +attack_speed, fin darts pierce
+  // attack@max_target enemies on the line and cause attack@sluggish s of 停顿.
+  // 技能策略 → DEFAULT (PR #12; DESIGN §21.29): the official 下半 class row hands every MANUAL 重装 skill TAKE_DAMAGE,
+  // which makes a 2-2 ranged 哨戒铁卫 wait until something hits her — in practice until she blocks (GitHub issue #4). By
+  // the owner's deliberate deviation from that row (2026-10-03, community feedback) this offensive ranged skill takes
+  // the basic strategy (SP ready + about to attack + an enemy inside the initial range); her data says DEFAULT too
+  // (rawRule keeps the official TAKE_DAMAGE). Only the rule changes: spCost / initSp / spType still come from data.
+  // 细胞活性抑制剂: attacks inflict `damage` arts per `interval` s for `duration` s (damage_seamonster vs 【海怪】).
+  // Elite module (SPT-X): stealth of enemies inside the range is cancelled.
+  // Alternate S1 侵袭破坏应对 (重装 ⇒ TAKE_DAMAGE trigger from data): ATK +atk, DEF +def.
+  chess_char_1_04_a: (bb, chess, def) => {
+    const t = talentBb(chess, 0);
+    const s1 = skillBbOf(chess, 'skchr_udflow_1');
+    return {
+      skill: {
+        trigger: 'DEFAULT',
+        kind: 'duration', mods: { atkPct: num(bb.atk), aspd: num(bb.attack_speed) },
+        targeting: { rangeGrid: def?.skill?.rangeGrid ?? null, maxTargets: num(bb['attack@max_target'], 1) },
+        attack: { onHitStatus: { key: 'sluggish', duration: num(bb['attack@sluggish'], 1) } },
+      },
+      skills: { skchr_udflow_1: { kind: 'duration', mods: { atkPct: num(s1.atk), defPct: num(s1.def) } } },
+      talents: [{ install(battle, unit) {
+        const dur = num(t.duration), iv = num(t.interval, 1);
+        if (!(dur > 0) || !(num(t.damage) > 0)) return;
+        battle.on('damaged', (ctx) => {
+          if (ctx.source !== unit || !ctx.dmg?.isAttack || ctx.target.side !== 'enemy' || !ctx.target.alive) return;
+          const sea = (ctx.target.def?.tags || []).includes('seamonster');
+          const amount = sea ? num(t.damage_seamonster, num(t.damage) * 2) : num(t.damage);
+          battle.addBuff(ctx.target, {
+            key: `udflow:dot:${unit.id}`, duration: dur, interval: iv, refresh: 'extend', source: unit, visible: false,
+            onTick: ({ battle: b, unit: e }) => b.dealDamage(unit, e, { amount, type: 'arts', canDodge: false, tags: ['dot'] }),
+          });
+        }, { owner: unit });
+      } }],
+      install(battle, unit) { if (moduleOn(chess) && chess.isGolden) installReveal(battle, unit); },
+    };
+  },
+};
@@ -0,0 +1,33 @@
+// server/sim/content/kits/ops/chess_char_1_05-vigna.js — 红豆 (char_290_vigna) kit, tier 1 (hidden).
+// Conventions of the tier-1 kits: ../shared/tier1.js; kit contract and rules: ../README.md.
+
+import { num, talentBb, traitBb, onHitBy, batMod } from '../shared/tier1.js';
+
+export default {
+  // ---------------------------------------------------------------------------------------------------------------
+  // 1_05 红豆 (hidden) 槌音: base attack time +base_attack_time s, ATK +atk. 蛮力穿刺: each attack prob1 (prob2 while the skill
+  // runs) for ATK +atk on that attack. Elite module (CHG-Y): vs enemies below hp_ratio HP, ATK ×atk_scale.
+  chess_char_1_05_a: (bb, chess) => {
+    const t = talentBb(chess, 0);
+    const tb = traitBb(chess);
+    return {
+      skill: { kind: 'duration', mods: { atkPct: num(bb.atk), batPct: batMod(bb.base_attack_time, chess) } },
+      talents: [{ install(battle, unit) {
+        const key = 'vigna:proc';
+        battle.on('beforeAttack', (ctx) => {
+          if (ctx.attacker !== unit) return;
+          const p = unit.skill?.active ? num(t.prob2) : num(t.prob1);
+          if (p > 0 && battle.rng.chance(p)) {
+            battle.addBuff(unit, { key, duration: 0.1, mods: { atkPct: num(t.atk) } });
+            battle.fx('crit', { x: unit.x, y: unit.y, id: unit.id });
+          }
+        }, { owner: unit });
+        // melee hits resolve synchronously inside the attack: the one-attack buff is dropped right after it
+        battle.on('attack', (ctx) => { if (ctx.attacker === unit && unit.findBuff(key)) battle.removeBuff(unit, key); }, { owner: unit });
+        if (tb.hp_ratio != null && num(tb.atk_scale, 1) !== 1) {
+          onHitBy(battle, unit, ({ target, dmg }) => { if (dmg.isAttack && target.hpRatio < num(tb.hp_ratio)) dmg.amount *= num(tb.atk_scale, 1); });
+        }
+      } }],
+    };
+  },
+};
@@ -0,0 +1,73 @@
+// server/sim/content/kits/ops/chess_char_1_06-vendla.js — 刺玫 (char_494_vendla) kit, tier 1.
+// Conventions of the tier-1 kits: ../shared/tier1.js; kit contract and rules: ../README.md.
+
+import { num, talentBb, up, byEnemyAttack, alliesInGridOf, skillBbOf } from '../shared/tier1.js';
+
+export default {
+  // ---------------------------------------------------------------------------------------------------------------
+  // 1_06 刺玫 荆藤庇荫: ATK +atk; the ally with the highest max HP in range gets taunt +taunt_level; whenever that ally is
+  // attacked, 刺玫 deals atk_scale × ATK arts to the attacker, and her trait heal (scale × damage) only goes to that ally.
+  // 土壤基肥改良: the highest-max-HP ally in range receives heal_scale × healing ("受到的治疗效果提升") — never its natural /
+  // skill HP regeneration (the 生命回复速度 attribute is "不受治疗加成影响": 宴 分神, 角峰 体能强化; PRTS).
+  // Alternate S1 战术咏唱·γ型: ASPD +attack_speed (the trait heal keeps going to the most injured ally in range).
+  // Elite module INC-X (heal 60 % of the damage) is the incantation profile of the module trait (TUNE.incantationmedic).
+  chess_char_1_06_a: (bb, chess) => {
+    const hs = num(talentBb(chess, 0).heal_scale, 1);
+    const tauntKey = 'vendla:taunt';
+    // the protégé only exists while 荆藤庇荫 runs (mem.protege is set by its onStart only)
+    const protege = (u) => (u.skill?.active && up(u.mem.protege) ? u.mem.protege : null);
+    return {
+      skills: { 'skcom_magic_rage[3]': { kind: 'duration', mods: { aspd: num(skillBbOf(chess, 'skcom_magic_rage[3]').attack_speed) } } },
+      trait: {
+        // 咒愈师 trait: EVERY damage she deals heals an ally for 50 % of it (professions.js `installIncantation`,
+        // buff_template_data `vendla_tr` = ON_AFTER_OUTPUT_DAMAGE) — while 荆藤庇荫 runs her S2 says "仅对该角色触发刺玫
+        // 特性", so her protégé is the target then; otherwise it is the lowest-HP ally in range.
+        install(battle, u) {
+          battle.on('damaged', (c) => {
+            const t = c.target;
+            if (c.source !== u || !u.alive || !t || t.side !== 'enemy' || !(c.amount > 0)) return;
+            if (c.type === 'element' || c.type === 'elemental') return;
+            const ally = (c.dmg && c.dmg.traitAlly) || protege(u) || battle.lowestHpAllyInRange(u);
+            if (ally) battle.heal(u, ally, c.amount * (u.profile.healRatio ?? 0.5), { tags: ['incantation'] });
+          }, { owner: u });
+        },
+      },
+      skill: {
+        kind: 'duration', mods: { atkPct: num(bb.atk) },
+        onStart({ battle, unit, skill }) {
+          const cands = alliesInGridOf(battle, unit).sort((a, b) => b.s.maxHp - a.s.maxHp || a.deploySeq - b.deploySeq);
+          const p = cands[0] ?? null;
+          unit.mem.protege = p;
+          if (!p) return;
+          battle.addBuff(p, { key: tauntKey, duration: skill.duration + 0.1, mods: { taunt: num(bb.taunt_level, 1) }, visible: true, source: unit });
+          battle.fx('taunt', { x: p.x, y: p.y, id: p.id });
+        },
+        onEnd({ battle, unit }) {
+          if (unit.mem.protege) battle.removeBuff(unit.mem.protege, tauntKey);
+          unit.mem.protege = null;
+        },
+      },
+      talents: [{ install(battle, unit) {
+        battle.on('damaged', (ctx) => {
+          const p = protege(unit);
+          if (!p || ctx.target !== p || !byEnemyAttack(ctx) || !ctx.source.alive || !unit.canAct) return;
+          // "并仅对该角色触发刺玫特性": this counter damage is healed by the trait (install above) for the protégé — the
+          // damage instance names her, so no separate heal here (it would double)
+          battle.dealDamage(unit, ctx.source, { amount: unit.s.atk * num(bb.atk_scale), type: 'arts', isSkill: true, canDodge: false, tags: ['counter'], traitAlly: p });
+          battle.fx('counter', { x: ctx.source.x, y: ctx.source.y, id: unit.id });
+        }, { owner: unit });
+        if (hs !== 1) {
+          let cacheT = -1, top = null;
+          battle.on('heal', (ctx) => {
+            if (!up(unit) || ctx.opts?.regen) return;
+            if (cacheT !== battle.time) {
+              cacheT = battle.time;
+              top = alliesInGridOf(battle, unit).sort((a, b) => b.s.maxHp - a.s.maxHp || a.deploySeq - b.deploySeq)[0] ?? null;
+            }
+            if (ctx.target === top) ctx.amount *= hs;
+          }, { owner: unit });
+        }
+      } }],
+    };
+  },
+};
@@ -0,0 +1,64 @@
+// server/sim/content/kits/ops/chess_char_1_07-prove.js — 普罗旺斯 (char_145_prove) kit, tier 1.
+// Conventions of the tier-1 kits: ../shared/tier1.js; kit contract and rules: ../README.md.
+
+import { sortEnemyTargets } from '../../../targeting.js';
+import { frontOf } from '../../../dir.js';
+import { bodyOnTile } from '../../../body.js';
+import { num, talentBb, isMainHit, onHitBy, skillBbOf } from '../shared/tier1.js';
+
+/** 普罗旺斯 杀戮嗅觉 "普通攻击不再以生命值高于80%的敌人作为目标" — the 80 % exists only in the skill text. */
+const PROVE_S2_MAX_HP = 0.8;
+
+export default {
+  // ---------------------------------------------------------------------------------------------------------------
+  // 1_07 普罗旺斯 狼眼 (passive): per hp_ratio_drop of HP the target has lost, ATK +atk_scale_up against it — CONTINUOUS,
+  // not in 20 % steps (PRTS note: "并非以每20%为固定节点 … 攻击力倍率提升至[100%+(100%-目标生命比例)×加成量×5]", i.e.
+  // ×(1 + lost / hp_ratio_drop × atk_scale_up)).
+  // 狩猎箭头: each attack prob (prob2 when the enemy is on the tile right in front) for ATK ×atk_scale.
+  // 狼眼 is an ATK increase ⇒ it scales her (ATK-based) attacks only, never fixed-value damage she sources
+  // (叙拉古 5000+50·L true proc, fixed item/DoT ticks…).
+  // Alternate S2 杀戮嗅觉: ATK +atk, but normal attacks never target an enemy above 80 % HP (with only such enemies in
+  // range she holds her fire). Her attacks stay normal attacks. (狼眼 is S1 only: absent when S2 is carried.)
+  // Elite module ARC-X only changes stats (ATK/DEF, faster redeploy).
+  chess_char_1_07_a: (bb, chess) => {
+    const t = talentBb(chess, 0);
+    const drop = num(bb.hp_ratio_drop), upPer = num(bb.atk_scale_up);
+    const S2 = 'skchr_prove_2';
+    const huntable = (e) => e.hpRatio <= PROVE_S2_MAX_HP + 1e-9;
+    const s2On = (u) => !!(u.skill && u.skill.active && u.skill.id === S2);
+    return {
+      skill: { kind: 'passive' },
+      skills: { [S2]: { kind: 'duration', mods: { atkPct: num(skillBbOf(chess, S2).atk) } } },
+      trait: {
+        canAttack: (battle, u) => !s2On(u) || battle.enemiesInKeys(u.rangeKeys, u, u.profile).some(huntable),
+      },
+      install(battle, unit) {
+        if (unit.skill?.id !== S2) return;
+        battle.on('beforeAttack', (ctx) => {
+          if (ctx.attacker !== unit || !s2On(unit) || ctx.targets.every(huntable)) return;
+          const prof = ctx.profile || unit.profile;
+          const cands = battle.enemiesInKeys(unit.rangeKeys, unit, prof).filter(huntable);
+          sortEnemyTargets(battle, unit, cands, prof.priority);
+          ctx.targets = cands.slice(0, Math.max(1, ctx.targets.length));
+        }, { owner: unit });
+      },
+      talents: [{ install(battle, unit) {
+        onHitBy(battle, unit, ({ target, dmg }) => {
+          if (!dmg.isAttack) return;
+          if (drop > 0 && upPer > 0) {
+            const lost = Math.max(0, Math.min(1, 1 - target.hpRatio));
+            if (lost > 0) dmg.amount *= 1 + (lost / drop) * upPer;
+          }
+          if (!isMainHit(dmg)) return;
+          const [fr, fc] = frontOf(unit.tileR, unit.tileC, unit.dir);
+          const front = bodyOnTile(target, fr, fc);
+          const p = front ? num(t.prob2) : num(t.prob);
+          if (p > 0 && battle.rng.chance(p)) {
+            dmg.amount *= num(t.atk_scale, 1);
+            battle.fx('crit', { x: target.x, y: target.y, id: unit.id });
+          }
+        });
+      } }],
+    };
+  },
+};
@@ -0,0 +1,43 @@
+// server/sim/content/kits/ops/chess_char_1_08-texas.js — 德克萨斯 (char_102_texas) kit, tier 1.
+// Conventions of the tier-1 kits: ../shared/tier1.js; kit contract and rules: ../README.md.
+
+import { num, talentBb, enemiesInGrid, skillBbOf, RING1 } from '../shared/tier1.js';
+
+export default {
+  // ---------------------------------------------------------------------------------------------------------------
+  // 1_08 德克萨斯 剑雨: +cost DP; every enemy around (skill grid) takes two hits of atk_scale × ATK arts and is
+  // stunned `stun` s — air units too (PRTS 备注 "※可对空"). 战术快递: +cost initial DP. (Elite hidden runtime_cost −4
+  // "首次部署时部署费用-4": the initial deployment is free in battle ⇒ no effect.)
+  // Alternate S1 冲锋号令·γ型 (AUTO, no target): +cost DP at once. An AUTO skill keeps its normal rule in this mode
+  // (research 03 §1.4: only MANUAL skills are converted by the trigger table) ⇒ it fires as soon as SP is full.
+  chess_char_1_08_a: (bb, chess, def) => ({
+    skills: {
+      'skcom_charge_cost[3]': {
+        kind: 'instant', trigger: 'SP_FULL',
+        onStart({ battle, unit }) {
+          const n = num(skillBbOf(chess, 'skcom_charge_cost[3]').cost);
+          battle.addDp(unit.ownerId, n);
+          battle.fx('dp', { x: unit.x, y: unit.y, n, id: unit.id });
+        },
+      },
+    },
+    skill: {
+      kind: 'instant',
+      onStart({ battle, unit }) {
+        battle.addDp(unit.ownerId, num(bb.cost));
+        battle.fx('dp', { x: unit.x, y: unit.y, n: num(bb.cost), id: unit.id });
+        const grid = def?.skill?.rangeGrid;
+        const foes = grid ? enemiesInGrid(battle, unit, grid) : battle.foesInRadius(unit.x, unit.y, RING1).filter((e) => !e.s.flags.untargetable);
+        battle.fx('aoe', { x: unit.x, y: unit.y, radius: 2, id: unit.id, skill: 'swordRain' });
+        for (const e of foes) {
+          for (let i = 0; i < 2 && e.alive; i++) battle.dealDamage(unit, e, { amount: unit.s.atk * num(bb.atk_scale), type: 'arts', isSkill: true, tags: ['skill'] });
+          if (e.alive) battle.applyStatus(e, 'stun', { duration: num(bb.stun), source: unit });
+        }
+      },
+    },
+    talents: [{ install(battle, unit) {
+      const n = num(talentBb(chess, 0).cost);
+      if (n > 0) battle.on('battleStart', () => battle.addDp(unit.ownerId, n), { owner: unit });
+    } }],
+  }),
+};
@@ -0,0 +1,32 @@
+// server/sim/content/kits/ops/chess_char_1_09-caper.js — 跃跃 (char_4100_caper) kit, tier 1.
+// Conventions of the tier-1 kits: ../shared/tier1.js; kit contract and rules: ../README.md.
+
+import { num, talentBb, traitBb, cheb, onHitBy, skillBbOf } from '../shared/tier1.js';
+
+export default {
+  // ---------------------------------------------------------------------------------------------------------------
+  // 1_09 跃跃 (回环射手: every attack is a boomerang out to the target and back — she attacks again only once it is
+  // caught, professions.js loopshooter / ai.js throwBoomerang). 乐趣加倍: ATK +atk, each attack throws `cnt`
+  // boomerangs at the target (cnt hits); they fly the same path, so the flight carries cnt hits and all of them are
+  // back together ("必须回收全部回旋投掷物才可以进行下一次攻击"). 戏耍随心: prob per hit (each boomerang on its own) for
+  // ATK ×atk_scale. Elite module (LPS-X, trait atk_scale): vs enemies on the 8 surrounding tiles ATK ×atk_scale.
+  // Alternate S1 强力击·β型 (AUTO, attack SP): the next attack at atk_scale × ATK.
+  chess_char_1_09_a: (bb, chess) => {
+    const t = talentBb(chess, 0);
+    const near = num(traitBb(chess).atk_scale, 1);
+    return {
+      skill: { kind: 'duration', mods: { atkPct: num(bb.atk) }, attack: { hits: Math.max(1, Math.floor(num(bb.cnt, 1))) } },
+      skills: { skchr_caper_1: { kind: 'instant', attack: { atkScale: num(skillBbOf(chess, 'skchr_caper_1').atk_scale, 1) } } },
+      talents: [{ install(battle, unit) {
+        onHitBy(battle, unit, ({ target, dmg }) => {
+          if (!dmg.isAttack) return;
+          if (near !== 1 && cheb(unit, target) <= 1) dmg.amount *= near;
+          if (!dmg.isSplash && num(t.prob) > 0 && battle.rng.chance(num(t.prob))) {
+            dmg.amount *= num(t.atk_scale, 1);
+            battle.fx('crit', { x: target.x, y: target.y, id: unit.id });
+          }
+        });
+      } }],
+    };
+  },
+};
@@ -0,0 +1,85 @@
+// server/sim/content/kits/ops/chess_char_1_10-sunbr.js — 古米 (char_196_sunbr) kit, tier 1.
+// Conventions of the tier-1 kits: ../shared/tier1.js; kit contract and rules: ../README.md.
+
+import { num, talentBb, traitBb, isMainHit, onHitBy, instantKind, skillRec } from '../shared/tier1.js';
+
+export default {
+  // ---------------------------------------------------------------------------------------------------------------
+  // 1_10 古米 备用军粮 (自动触发, ct charges — an AUTO skill: no 技能策略 applies, it keeps its own rule; PRTS 备注 "此技能
+  // 在存在生命值不满的可治疗角色时可触发；技能触发后古米将切换至治疗模式（普通攻击改为治疗技能范围内的一名友方单位），直至古米
+  // 完成一次普通攻击的治疗"): cast as soon as a healable ally of the skill range (x-4, herself included) is injured —
+  // no enemy needed (user playtest #6: it waited until she engaged) — then her next normal attack heals the most
+  // injured ally of the skill range for heal_scale × ATK instead of hitting an enemy; she makes no normal attack until
+  // that heal is done. Elite module (GUA-X): targets below hp_ratio HP get ×heal_scale more.
+  // 平底锅专精: each attack prob for ATK ×atk_scale and a `stun` s stun (only when that hit lands).
+  // Alternate S2 食粮烹制 (PRTS notes: 10 s 缴械 at the start, the real duration is disarm + 30 s, attacks become heals
+  // with the attack interval +130 %): cooking for `disarm` s — no attacks, DEF +def; then for the skill's `duration` s
+  // she heals the most injured ally inside the skill grid (x-4) for ATK per attack, ATK +atk, base attack time
+  // ×(1 + base_attack_time). The GUA-X heal bonus (below hp_ratio: ×heal_scale) applies to these heals too.
+  // Trigger: TAKE_DAMAGE (data: the 重装 strategy "不受技能范围影响，受到伤害时释放技能").
+  chess_char_1_10_a: (bb, chess, def) => {
+    const t = talentBb(chess, 0);
+    const tb = traitBb(chess);
+    const S2 = 'skchr_sunbr_2';
+    const r2 = skillRec(chess, S2);
+    const b2 = r2?.bb ?? {};
+    const cook = Math.max(0, num(b2.disarm, 10));
+    const cookKey = 'sunbr:cook', serveKey = 'sunbr:serve';
+    const healGrid = def?.skill?.rangeGrid ?? null;
+    return {
+      skills: {
+        [S2]: {
+          kind: 'duration', duration: cook + Math.max(0, num(r2?.duration, 30)),
+          mods: { batPct: Math.max(0, num(b2.base_attack_time)) },
+          targeting: { rangeGrid: r2?.rangeGrid ?? def?.skill?.rangeGrid ?? null },
+          attack: { dmgType: 'heal', heal: { mode: 'single' } },
+          onStart({ battle, unit }) {
+            battle.addBuff(unit, { key: cookKey, duration: cook, mods: { defPct: num(b2.def) }, flags: { disarm: true }, tags: ['skill'], visible: true });
+          },
+          onTick({ battle, unit }) {
+            if (!unit.findBuff(cookKey) && !unit.findBuff(serveKey)) {
+              battle.addBuff(unit, { key: serveKey, mods: { atkPct: num(b2.atk) }, tags: ['skill'] });
+              battle.fx('buff', { x: unit.x, y: unit.y, id: unit.id, kind: 'heal' });
+            }
+          },
+          onEnd({ battle, unit }) {
+            battle.removeBuff(unit, cookKey);
+            battle.removeBuff(unit, serveKey);
+          },
+        },
+      },
+      install(battle, unit) {
+        if (tb.hp_ratio == null || num(tb.heal_scale, 1) === 1) return;
+        // GUA-X on her skill heals (S1's heal-mode attack, S2's attack heals while it runs — herself included, she stands
+        // in the grid), never her natural / self regeneration
+        battle.on('heal', (ctx) => {
+          if (ctx.source !== unit || !unit.skill?.active || ctx.opts?.regen || ctx.opts?.self) return;
+          if (ctx.target.hpRatio < num(tb.hp_ratio)) ctx.amount *= num(tb.heal_scale, 1);
+        }, { owner: unit });
+      },
+      skill: {
+        kind: instantKind(def),
+        heal: true,
+        ...(healGrid ? { trigger: { rule: 'SKILL_RANGE', grid: healGrid, allies: true }, targeting: { rangeGrid: healGrid } } : {}),
+        // the heal-mode attack: the most injured ally of the skill range (acquireTargets, heal profile)
+        attack: { dmgType: 'heal', heal: { mode: 'single' }, healScale: num(bb.heal_scale, 1), projectile: 'none' },
+        onHit({ battle, target }) { if (target) battle.fx('heal', { x: target.x, y: target.y, id: target.id }); },
+      },
+      talents: [{ install(battle, unit) {
+        // the proc is rolled per attack hit; the stun only follows a hit that landed (not dodged / cancelled)
+        const procs = new WeakSet();
+        onHitBy(battle, unit, ({ target, dmg }) => {
+          if (!isMainHit(dmg) || !(num(t.prob) > 0) || !battle.rng.chance(num(t.prob))) return;
+          dmg.amount *= num(t.atk_scale, 1);
+          procs.add(dmg);
+          battle.fx('crit', { x: target.x, y: target.y, id: unit.id });
+        });
+        battle.on('damaged', (ctx) => {
+          if (ctx.source !== unit || !ctx.dmg || !procs.has(ctx.dmg) || !ctx.target.alive) return;
+          procs.delete(ctx.dmg);
+          battle.applyStatus(ctx.target, 'stun', { duration: num(t.stun), source: unit });
+        }, { owner: unit });
+      } }],
+    };
+  },
+};
@@ -0,0 +1,15 @@
+// server/sim/content/kits/ops/chess_char_1_11-skgoat.js — 地灵 (char_183_skgoat) kit, tier 1 (hidden).
+// Conventions of the tier-1 kits: ../shared/tier1.js; kit contract and rules: ../README.md.
+
+import { num, talentBb, traitBb } from '../shared/tier1.js';
+
+export default {
+  // ---------------------------------------------------------------------------------------------------------------
+  // 1_11 地灵 (hidden) 攻击力强化·β型: ATK +atk. Elite 地质勘探: trait 停顿 +sluggish s (module trait 1.2 s included).
+  chess_char_1_11_a: (bb, chess) => {
+    const add = num(talentBb(chess, 0).sluggish);
+    const kit = { skill: { kind: 'duration', mods: { atkPct: num(bb.atk) } } };
+    if (add > 0) kit.trait = { onHitStatus: { key: 'sluggish', duration: num(traitBb(chess).sluggish, 0.8) + add } };
+    return kit;
+  },
+};
@@ -0,0 +1,34 @@
+// server/sim/content/kits/ops/chess_char_1_12-estell.js — 艾丝黛尔 (char_127_estell) kit, tier 1.
+// Conventions of the tier-1 kits: ../shared/tier1.js; kit contract and rules: ../README.md.
+
+import { absoluteRangeKeys } from '../../../targeting.js';
+import { bodyInKeys } from '../../../body.js';
+import { num, talentBb, talentGrid, traitBb, up, cheb, onHitOn, skillBbOf } from '../shared/tier1.js';
+
+export default {
+  // ---------------------------------------------------------------------------------------------------------------
+  // 1_12 艾丝黛尔 舍身突击 (hurt SP): ATK +atk, cannot be healed by others. 自愈能力: an enemy dying within the talent
+  // grid (8 surrounding tiles) heals her hp_ratio × max HP. Elite module (CEN-Y): above hp_ratio HP, physical damage
+  // taken −damage_resistance.
+  // Alternate S1 攻击力强化·β型: ATK +atk (she stays a heal target).
+  chess_char_1_12_a: (bb, chess) => {
+    const t = talentBb(chess, 0);
+    const grid = talentGrid(chess, 0);
+    const tb = traitBb(chess);
+    return {
+      skill: { kind: 'duration', mods: { atkPct: num(bb.atk) }, flags: { noHeal: true } },
+      skills: { 'skcom_atk_up[2]': { kind: 'duration', mods: { atkPct: num(skillBbOf(chess, 'skcom_atk_up[2]').atk) } } },
+      talents: [{ install(battle, unit) {
+        battle.on('death', (ctx) => {
+          const e = ctx.unit;
+          if (e.side !== 'enemy' || ctx.reason !== 'killed' || !up(unit)) return;
+          const near = grid ? bodyInKeys(e, absoluteRangeKeys(grid, unit.tileR, unit.tileC, unit.dir, 0)) : cheb(unit, e) <= 1;
+          if (near) battle.heal(unit, unit, unit.s.maxHp * num(t.hp_ratio), { self: true, tags: ['talent'] });
+        }, { owner: unit });
+        if (tb.damage_resistance != null) {
+          onHitOn(battle, unit, ({ dmg }) => { if (dmg.type === 'phys' && unit.hpRatio > num(tb.hp_ratio)) dmg.mul *= 1 - num(tb.damage_resistance); });
+        }
+      } }],
+    };
+  },
+};
@@ -0,0 +1,64 @@
+// server/sim/content/kits/ops/chess_char_1_13-podego.js — 波登可 (char_258_podego) kit, tier 1.
+// Conventions of the tier-1 kits: ../shared/tier1.js; kit contract and rules: ../README.md.
+
+import {
+  num, talentBb, moduleBb, up, enemiesInGrid, enemyInRange, installAura, spTimeBonus, makeZone, skillBbOf,
+} from '../shared/tier1.js';
+
+// =================================================================================================================
+// tier-local constants that exist nowhere in data
+
+/** Radius (tiles) of 波登可's spore cloud. No blackboard key; PRTS 波登可 备注 "孢子群范围半径为0.9，可对空". */
+const SPORE_RADIUS = 0.9;
+
+export default {
+  // ---------------------------------------------------------------------------------------------------------------
+  // 1_13 波登可 孢子扩散: a vial bursts on the current target into a projectile_delay_time s spore cloud (radius 0.9,
+  // PRTS 备注, 可对空): enemies inside are 停顿 and lose their abilities (silence) and take atk_scale × ATK arts per second.
+  // 园丁: every 【辅助】 operator on the field ATK +atk. Elite module (DEC-X): +sp_recovery_per_sec SP/s with an enemy in range.
+  // Alternate S1 花香疗法: ATK +atk, normal attacks heal the most injured ally in range instead (ATK per attack). A heal
+  // skill: DEFAULT fires it with an injured ally inside her initial range (research 03 §1.4) — also checked every tick,
+  // since she is only "about to attack" with an enemy in range.
+  chess_char_1_13_a: (bb, chess) => {
+    const t = talentBb(chess, 0);
+    const spBonus = num(moduleBb(chess).sp_recovery_per_sec);
+    const dur = num(bb.projectile_delay_time, 5);
+    const S1 = 'skchr_podego_1';
+    return {
+      skills: {
+        [S1]: { kind: 'duration', heal: true, mods: { atkPct: num(skillBbOf(chess, S1).atk) }, attack: { dmgType: 'heal', heal: { mode: 'single' } } },
+      },
+      install(battle, unit) {
+        if (unit.skill?.id !== S1) return;
+        battle.on('tick', () => {
+          const sk = unit.skill;
+          if (!up(unit) || !unit.canAct || !sk.ready || sk.active || sk.opCooling || unit.s.flags.silence) return;
+          if (battle.injuredAlliesInKeys(unit.baseRangeKeys || unit.rangeKeys, unit).length) sk.activate('DEFAULT');
+        }, { owner: unit });
+      },
+      skill: {
+        kind: 'instant',
+        onStart({ battle, unit }) {
+          const tgt = enemiesInGrid(battle, unit, null, { n: 1 })[0];
+          const x = tgt ? tgt.x : unit.x + unit.fwd[1], y = tgt ? tgt.y : unit.y + unit.fwd[0];
+          const atk = unit.s.atk;
+          makeZone(battle, unit, {
+            x, y, radius: SPORE_RADIUS, duration: dur, skill: 'spores', onPulse(b) {
+              for (const e of b.foesInRadius(x, y, SPORE_RADIUS)) {
+                if (e.s.flags.untargetable) continue;
+                b.applyStatus(e, 'sluggish', { duration: 1.05, source: unit });
+                b.applyStatus(e, 'silence', { duration: 1.05, source: unit });
+                b.dealDamage(unit, e, { amount: atk * num(bb.atk_scale), type: 'arts', isSkill: true, canDodge: false, tags: ['dot', 'zone'] });
+              }
+            },
+          });
+        },
+      },
+      talents: [{ install(battle, unit) {
+        const v = num(t.atk);
+        if (v) installAura(battle, unit, { key: 'talent:podego', value: v, select: (a) => a.kind === 'op' && a.def.profession === 'SUPPORT', mods: { atkPct: v } });
+        spTimeBonus(battle, unit, spBonus, () => enemyInRange(battle, unit));
+      } }],
+    };
+  },
+};
@@ -0,0 +1,22 @@
+// server/sim/content/kits/ops/chess_char_1_14-greyy.js — 格雷伊 (char_253_greyy) kit, tier 1.
+// Conventions of the tier-1 kits: ../shared/tier1.js; kit contract and rules: ../README.md.
+
+import { num, talentBb, skillBbOf } from '../shared/tier1.js';
+
+export default {
+  // ---------------------------------------------------------------------------------------------------------------
+  // 1_14 格雷伊 静电释放: ASPD +attack_speed, the talent 停顿 lasts talent_scale × longer.
+  // 静电场: attacks cause `sluggish` s of 停顿 to the attacked target.
+  // Alternate S1 战术咏唱·β型: ASPD +attack_speed (the talent 停顿 keeps its length). Elite module SPC-Y: cost only.
+  chess_char_1_14_a: (bb, chess) => {
+    const sl = num(talentBb(chess, 0).sluggish);
+    return {
+      skills: { 'skcom_magic_rage[2]': { kind: 'duration', mods: { aspd: num(skillBbOf(chess, 'skcom_magic_rage[2]').attack_speed) } } },
+      trait: sl > 0 ? { onHitStatus: { key: 'sluggish', duration: sl } } : undefined,
+      skill: {
+        kind: 'duration', mods: { aspd: num(bb.attack_speed) },
+        attack: sl > 0 ? { onHitStatus: { key: 'sluggish', duration: sl * num(bb.talent_scale, 1) } } : {},
+      },
+    };
+  },
+};
@@ -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,
+};
@@ -0,0 +1,65 @@
+// server/sim/content/kits/ops/chess_char_1_16-tinman.js — 锡人 (char_4151_tinman) kit, tier 1 (hidden).
+// Conventions of the tier-1 kits: ../shared/tier1.js; kit contract and rules: ../README.md.
+
+import { num, talentBb, moduleBb, enemiesInGrid, once, spTimeBonus, makeZone, instantKind } from '../shared/tier1.js';
+
+// =================================================================================================================
+// kit builders shared by two chess ids
+
+/**
+ * 锡人 “大拉里” (chess_char_1_16 hidden and chess_char_2_19): throw an alchemy unit at the current target —
+ * for projectile_delay_time s, ground enemies within projectile_range tiles take atk_scale × ATK arts per second,
+ * allies there recover hp_recovery_per_sec_ratio × ATK per second. Elite: 凋敝魂灵 (skill@damage_scale: damage-over-
+ * time taken by ground enemies inside a unit ×1.2) and the module's +sp_recovery_per_sec SP while a unit exists.
+ */
+export function tinmanKit(bb, chess, def) {
+  const dur = num(bb.projectile_delay_time, 10);
+  const radius = num(bb.projectile_range, 1.5);
+  const dmgScale = num(bb.atk_scale);
+  const healRatio = num(bb.hp_recovery_per_sec_ratio);
+  const wither = num(talentBb(chess, 1)['skill@damage_scale'], 1);
+  const spBonus = num(moduleBb(chess).sp_recovery_per_sec);
+  const witherKey = 'tinman:wither';
+  return {
+    skill: {
+      kind: instantKind(def),
+      onStart({ battle, unit }) {
+        const tgt = enemiesInGrid(battle, unit, null, { n: 1, groundOnly: true })[0] ?? enemiesInGrid(battle, unit, null, { n: 1 })[0];
+        const x = tgt ? tgt.x : unit.x + unit.fwd[1], y = tgt ? tgt.y : unit.y + unit.fwd[0];
+        const atk = unit.s.atk;
+        unit.mem.tinZones = (unit.mem.tinZones ?? 0) + 1;
+        makeZone(battle, unit, {
+          x, y, radius, duration: dur, skill: 'tinman', onPulse(b) {
+            for (const e of b.foesInRadius(x, y, radius)) {
+              if (e.isFlying || e.s.flags.untargetable) continue;
+              if (wither > 1) b.addBuff(e, { key: witherKey, duration: 1.05, data: { mul: wither }, source: unit });
+              b.dealDamage(unit, e, { amount: atk * dmgScale, type: 'arts', isSkill: true, canDodge: false, tags: ['dot', 'zone'] });
+            }
+            if (healRatio > 0) for (const a of b.alliesInRadius(x, y, radius, null)) if (a.hp < a.s.maxHp) b.heal(unit, a, atk * healRatio, { tags: ['zone'] });
+          },
+          onEnd() { unit.mem.tinZones = Math.max(0, (unit.mem.tinZones ?? 1) - 1); },
+        });
+      },
+    },
+    talents: [{ install(battle, unit) {
+      if (wither > 1) {
+        // "持续伤害" = damage over time only: 'dot'-tagged ticks and the per-second ticks of a necrosis / apoptosis
+        // burst — never instantaneous bursts (burn/neural bursts, skill/summon bursts are also tagged 'burst')
+        once(battle, witherKey, () => battle.on('hit', (ctx) => {
+          if (!ctx.target || ctx.target.side !== 'enemy') return;
+          const tags = ctx.dmg.tags || [];
+          if (!(tags.includes('dot') || tags.includes('necrosis') || tags.includes('apoptosis'))) return;
+          const w = ctx.target.findBuff(witherKey);
+          if (w) ctx.dmg.amount *= w.data?.mul ?? 1;
+        }));
+      }
+      spTimeBonus(battle, unit, spBonus, () => (unit.mem.tinZones ?? 0) > 0);
+    } }],
+  };
+}
+
+export default {
+  // ---------------------------------------------------------------------------------------------------------------
+  // 1_16 锡人 (hidden tier-1 entry of chess_char_2_19): see tinmanKit.
+  chess_char_1_16_a: tinmanKit,
+};
@@ -0,0 +1,71 @@
+// server/sim/content/kits/ops/chess_char_1_17-indigo.js — 深靛 (char_469_indigo) kit, tier 1.
+// Conventions of the tier-1 kits: ../shared/tier1.js; kit contract and rules: ../README.md.
+
+import { sortEnemyTargets } from '../../../targeting.js';
+import { num, talentBb, skillRec, batMod } from '../shared/tier1.js';
+
+export default {
+  // ---------------------------------------------------------------------------------------------------------------
+  // 1_17 深靛 光影迷宫: attack interval ×base_attack_time, talent chance ×talent_scale, bound enemies in range take
+  // indigo_s_2[damage].atk_scale × ATK arts every indigo_s_2[damage].interval s.
+  // 柔光缚目: attacks bind the target `duration` s with `prob`; bound enemies are never chosen as targets.
+  // Alternate S1 灯塔守卫者: for `duration` s the skill range (4-1), attack interval ×(1 + base_attack_time) (PRTS:
+  // "大幅度缩短(-80%)" ⇒ ×0.2 — a flat −0.8 s on 3 s would be less than S2's "略微缩短 ×0.7"), every attack hits for
+  // attack@atk_scale × ATK arts. Elite module MSC-X (store 4) is the mystic profile of the module trait (TUNE.mystic).
+  chess_char_1_17_a: (bb, chess, def) => {
+    const t = talentBb(chess, 0);
+    const dScale = num(bb['indigo_s_2[damage].atk_scale']);
+    const dIv = num(bb['indigo_s_2[damage].interval'], 0.5);
+    const bound = (e) => !!e.s.flags.bind;
+    const r1 = skillRec(chess, 'skchr_indigo_1');
+    const b1 = r1?.bb ?? {};
+    return {
+      skills: {
+        skchr_indigo_1: {
+          kind: 'duration', mods: { batPct: Math.max(-0.95, Math.min(0, num(b1.base_attack_time))) },
+          targeting: { rangeGrid: r1?.rangeGrid ?? null },
+          attack: { atkScale: num(b1['attack@atk_scale'], 1) },
+        },
+      },
+      trait: {
+        // with only bound enemies in range (or blocked by her — always her targets, Battle.blockedTargets) she holds her
+        // fire (the mystic trait stores the energy meanwhile)
+        canAttack(battle, u) {
+          const ok = battle.enemiesInKeys(u.rangeKeys, u, u.profile).some((e) => !bound(e)) || battle.blockedTargets(u, u.profile).some((e) => !bound(e));
+          if (!ok) u.trait.hadTarget = false;
+          return ok;
+        },
+        afterHit(battle, u, target) {
+          if (!target || !target.alive || target.side !== 'enemy') return;
+          const p = num(t.prob) * (u.skill?.active ? num(bb.talent_scale, 1) : 1);
+          if (p > 0 && battle.rng.chance(Math.min(1, p))) battle.applyStatus(target, 'bind', { duration: num(t.duration), source: u });
+        },
+      },
+      skill: {
+        kind: 'duration', mods: { batPct: batMod(bb.base_attack_time, chess, def?.skill?.description ?? chess?.skill?.desc) },
+        onStart({ unit }) { unit.mem.indigoAcc = 0; },
+        onTick({ battle, unit, dt }) {
+          if (!(dScale > 0) || !(dIv > 0)) return;
+          unit.mem.indigoAcc = (unit.mem.indigoAcc ?? 0) + dt;
+          while (unit.mem.indigoAcc >= dIv - 1e-9) {
+            unit.mem.indigoAcc -= dIv;
+            for (const e of battle.enemiesInKeys(unit.rangeKeys, unit, { canHitFly: true })) {
+              if (bound(e)) battle.dealDamage(unit, e, { amount: unit.s.atk * dScale, type: 'arts', isSkill: true, canDodge: false, tags: ['dot'] });
+            }
+          }
+        },
+      },
+      talents: [{ install(battle, unit) {
+        battle.on('beforeAttack', (ctx) => {
+          if (ctx.attacker !== unit || !ctx.targets.some(bound)) return;
+          const prof = ctx.profile || unit.profile;
+          const cands = battle.enemiesInKeys(unit.rangeKeys, unit, prof);
+          for (const e of battle.blockedTargets(unit, prof)) if (!cands.includes(e)) cands.push(e);
+          for (let i = cands.length - 1; i >= 0; i--) if (bound(cands[i])) cands.splice(i, 1);
+          sortEnemyTargets(battle, unit, cands, prof.priority);
+          ctx.targets = cands.slice(0, Math.max(1, ctx.targets.length));
+        }, { owner: unit });
+      } }],
+    };
+  },
+};
@@ -0,0 +1,57 @@
+// server/sim/content/kits/ops/chess_char_1_18-utage.js — 宴 (char_337_utage) kit, tier 1.
+// Conventions of the tier-1 kits: ../shared/tier1.js; kit contract and rules: ../README.md.
+
+import { num, talentBb, up, onHitBy, onHitOn, skillBbOf } from '../shared/tier1.js';
+
+export default {
+  // ---------------------------------------------------------------------------------------------------------------
+  // 1_18 宴 落地斩·破门 (passive): at each deployment lose hp_ratio of current HP, then for `duration` s ATK +atk and
+  // attacks deal arts damage. 认真模式: 坚忍 ASPD up to +min_attack_speed, reached at min_hp_ratio HP (linear).
+  // Elite (module talent): below hp_ratio HP, 庇护 −damage_resistance physical/arts damage taken.
+  // Alternate S1 分神: stops attacking, block count 0 (her blocked enemies walk on), DEF +def, recovers
+  // hp_recovery_per_sec_by_max_hp_ratio × max HP per second (the 生命回复速度 attribute: works under her 武者 no-heal).
+  chess_char_1_18_a: (bb, chess) => {
+    const t = talentBb(chess, 0);
+    const buffKey = 'utage:s2';
+    const s1 = skillBbOf(chess, 'skchr_utage_1');
+    return {
+      skills: {
+        skchr_utage_1: {
+          kind: 'duration',
+          mods: { defPct: num(s1.def), hpRegenRatio: num(s1.hp_recovery_per_sec_by_max_hp_ratio), blockCnt: -99 },
+          attack: { noAttack: true },
+          onStart({ battle, unit }) { battle.releaseBlocked(unit); },
+        },
+      },
+      skill: {
+        kind: 'passive',
+        onStart({ battle, unit }) {
+          const loss = unit.hp * num(bb.hp_ratio);
+          if (loss > 0 && unit.hp - loss >= 1) battle.loseHp(unit, loss, { source: unit });
+          battle.addBuff(unit, { key: buffKey, duration: num(bb.duration), mods: { atkPct: num(bb.atk) }, tags: ['skill'], visible: true });
+          battle.fx('aoe', { x: unit.x, y: unit.y, radius: 1, id: unit.id, skill: 'breach' });
+        },
+      },
+      talents: [{ install(battle, unit) {
+        onHitBy(battle, unit, ({ dmg }) => { if (dmg.isAttack && dmg.type === 'phys' && unit.findBuff(buffKey)) dmg.type = 'arts'; });
+        const maxAs = num(t.min_attack_speed), minHp = num(t.min_hp_ratio);
+        if (maxAs > 0 && minHp < 1) {
+          battle.on('tick', () => {
+            if (!up(unit)) return;
+            const v = maxAs * Math.max(0, Math.min(1, (1 - unit.hpRatio) / (1 - minHp)));
+            const cur = unit.findBuff('utage:serious');
+            if (cur && Math.abs((cur.data?.v ?? 0) - v) < 0.5) return;
+            if (v < 0.5) { if (cur) battle.removeBuff(unit, 'utage:serious'); return; }
+            battle.addBuff(unit, { key: 'utage:serious', mods: { aspd: v }, data: { v }, tags: ['talent'] });
+          }, { owner: unit });
+        }
+        // 庇护 (ba.protect): "受到的物理和法术伤害降低相应比例" — physical and arts damage only
+        if (t.damage_resistance != null && t.hp_ratio != null) {
+          onHitOn(battle, unit, ({ dmg }) => {
+            if ((dmg.type === 'phys' || dmg.type === 'arts') && unit.hpRatio < num(t.hp_ratio)) dmg.mul *= 1 - num(t.damage_resistance);
+          });
+        }
+      } }],
+    };
+  },
+};
@@ -0,0 +1,67 @@
+// server/sim/content/kits/ops/chess_char_1_19-wildmn.js — 野鬃 (char_496_wildmn) kit, tier 1.
+// Conventions of the tier-1 kits: ../shared/tier1.js; kit contract and rules: ../README.md.
+
+import { num, talentBb, skillRec } from '../shared/tier1.js';
+
+export default {
+  // ---------------------------------------------------------------------------------------------------------------
+  // 1_19 野鬃 夹枪冲锋: wider range (skill grid), ATK +atk, "攻击会把目标往攻击方向中等力度地推开" (attack@force 1 = 中力) by
+  // the official 力度 − 重量 distance (Battle.push: weight 0 → 2.14 tiles, 1 → 1.7, 2 → 0.44, 3 → 0.12, ≥ 4 → none; user
+  // playtest #6 item 14). A directional push (方向力, PRTS 推与拉): the client's S2 attack ability (charpack
+  // char_496_wildmn, anim Skill_2) carries buff wildmn_s_2[force] of template knockback[dir] — buff_template_data:
+  // Knockback {_useSourceDirection: true, _decreaseForceLevelWhenNotInDirection: 2} — i.e. along her deploy direction,
+  // radial at 受力等级 −2 for a target > 45° off it or < 0.25 tile away (特殊修正); the radial pushes are
+  // knockback[relative] (琳琅诗怀雅 S3, 山 S3, 莫斯提马 S3). Her text uses the 推击手 wording "往攻击方向". So an enemy she
+  // grabs behind her centre (the hand-over after a push freed her block) is not thrown 1.7 tiles towards the objective
+  // (player feedback D2, "往攻击方向相反方向推"; it was a radial push before).
+  // 一致向前: after deploying (normal flag 0: first deployment only; elite flag 1: every deployment) every undeployed
+  // 【近卫】 operator of the player costs `value` less DP to deploy (≤ max_stack_cnt per operator until it deploys).
+  // Alternate S1 骑枪刺击 (PASSIVE, ON_DEPLOY): for `duration` s after every deployment ASPD +attack_speed.
+  // Elite module CHG-X (+2 DP per kill) is the charger profile of the module trait (TUNE.charger).
+  chess_char_1_19_a: (bb, chess, def) => {
+    const t = talentBb(chess, 0);
+    const force = num(bb['attack@force'], 1);
+    const r1 = skillRec(chess, 'skchr_wildmn_1');
+    return {
+      skills: {
+        skchr_wildmn_1: {
+          kind: 'passive',
+          onStart({ battle, unit }) {
+            const d = num(r1?.duration);
+            if (d > 0) battle.addBuff(unit, { key: 'wildmn:s1', duration: d, mods: { aspd: num(r1?.bb?.attack_speed) }, tags: ['skill'], visible: true });
+          },
+        },
+      },
+      skill: {
+        kind: 'duration', mods: { atkPct: num(bb.atk) },
+        targeting: { rangeGrid: def?.skill?.rangeGrid ?? null },
+        attack: {
+          onHit({ battle, unit, target }) {
+            if (!target || !target.alive || target.side !== 'enemy') return;
+            battle.push(target, force, { from: unit, dir: { x: unit.fwd[1], y: unit.fwd[0] } });
+          },
+        },
+      },
+      talents: [{ install(battle, unit) {
+        const cut = Math.abs(num(t.value, -1)), cap = num(t.max_stack_cnt, 1), every = num(t.flag) === 1;
+        let deploys = 0;
+        battle.on('deploy', ({ unit: u }) => {
+          if (u === unit) {
+            deploys++;
+            if (!every && deploys > 1) return;
+            for (const a of battle.allyUnits) {
+              if (a === unit || a.kind !== 'op' || a.ownerId !== unit.ownerId || a.alive || a.removed || a.def.profession !== 'WARRIOR') continue;
+              const done = a.mem.wildmnCut ?? 0;
+              const d = Math.min(cut, cap - done, a.base.cost);
+              if (d > 0) { a.base.cost -= d; a.mem.wildmnCut = done + d; }
+            }
+          } else if (u.mem.wildmnCut > 0) {
+            // the discount is consumed by this deployment
+            u.base.cost += u.mem.wildmnCut;
+            u.mem.wildmnCut = 0;
+          }
+        }, { owner: unit });
+      } }],
+    };
+  },
+};
@@ -0,0 +1,81 @@
+// server/sim/content/kits/ops/chess_char_1_20-liskam.js — 雷蛇 (char_107_liskam) kit, tier 1.
+// Conventions of the tier-1 kits: ../shared/tier1.js; kit contract and rules: ../README.md.
+
+import {
+  num, talentBb, talentGrid, moduleOn, up, hurtSpDamage, giveSp, onDamagedOn, alliesInGridOf, statBuff, installReveal,
+  skillBbOf,
+} from '../shared/tier1.js';
+
+export default {
+  // ---------------------------------------------------------------------------------------------------------------
+  // 1_20 雷蛇 反击电弧 (hurt SP): attack interval ×(1 + base_attack_time) (PRTS "攻击间隔增大(+70%)": a RATIO for this skill,
+  // 1.2 → 2.04 s — not +0.7 s), ATK +atk, arts attacks on up to attack@max_target enemies,
+  // attack@buff_prob to stun attack@stun s; afterwards 雷蛇 is stunned `stun` s.
+  // 技能策略 → DEFAULT (PR #12; DESIGN §21.29): 反击电弧 is an offensive skill (ATK +125 %, arts hits on up to 3 enemies,
+  // stun); the official 下半 TANK row (TAKE_DAMAGE for every MANUAL 重装 skill) made it — and 深巡's S2 — wait for a hit
+  // (GitHub issue #4). The owner's deliberate deviation from that row (2026-10-03, community feedback) gives both
+  // 哨戒铁卫 S2s the basic strategy; the data says DEFAULT too (rawRule keeps the official TAKE_DAMAGE).
+  // 战术防御: when attacked, +sp SP to herself and to one random ally in the talent grid. Elite 雷抗: RES +magic_resistance.
+  // Elite module (SPT-X): stealth of enemies inside the range is cancelled.
+  // Alternate S1 充能防御 (AUTO, hurt SP, "技能自动开启" — an AUTO skill takes no 技能策略: SP_FULL, so the hit that fills SP
+  // sets it off): PRTS "技能拥有8s的持续时间": for bb.duration s DEF +def, and the next damage instance taken is blocked
+  // (cancelled — a blocked hit "导致第一天赋无法触发": no 战术防御 SP, no hurt SP).
+  chess_char_1_20_a: (bb, chess) => {
+    const t = talentBb(chess, 0);
+    const grid = talentGrid(chess, 0);
+    const S1 = 'skchr_liskam_1';
+    const b1 = skillBbOf(chess, S1);
+    const blockKey = 'liskam:block';
+    return {
+      skills: {
+        [S1]: {
+          kind: 'duration', duration: num(b1.duration, 8), mods: { defPct: num(b1.def) }, trigger: 'SP_FULL',
+          onStart({ battle, unit, skill }) {
+            battle.addBuff(unit, { key: blockKey, duration: skill.duration + 0.05, tags: ['skill'], visible: true });
+            battle.fx('shield', { x: unit.x, y: unit.y, id: unit.id });
+          },
+          onEnd({ battle, unit }) { battle.removeBuff(unit, blockKey); },
+        },
+      },
+      install(battle, unit) {
+        if (moduleOn(chess) && chess.isGolden) installReveal(battle, unit);
+        if (unit.skill?.id !== S1) return;
+        battle.on('hit', (ctx) => {
+          if (ctx.target !== unit || ctx.dmg.cancel || !(ctx.dmg.amount > 0) || !unit.findBuff(blockKey)) return;
+          ctx.dmg.cancel = true;
+          battle.removeBuff(unit, blockKey);
+          battle.fx('shield', { x: unit.x, y: unit.y, id: unit.id });
+        }, { owner: unit, priority: 50 });
+      },
+      skill: {
+        trigger: 'DEFAULT',
+        kind: 'duration', mods: { atkPct: num(bb.atk), batPct: Math.max(0, num(bb.base_attack_time)) },
+        targeting: { maxTargets: Math.max(1, Math.floor(num(bb['attack@max_target'], 1))) },
+        attack: {
+          dmgType: 'arts',
+          onHit({ battle, unit, target }) {
+            if (target && target.alive && battle.rng.chance(num(bb['attack@buff_prob']))) battle.applyStatus(target, 'stun', { duration: num(bb['attack@stun']), source: unit });
+          },
+        },
+        onEnd({ battle, unit, reason }) {
+          if (reason !== 'death' && unit.alive && num(bb.stun) > 0) battle.applyStatus(unit, 'stun', { duration: num(bb.stun), source: unit });
+        },
+      },
+      talents: [{ install(battle, unit) {
+        const sp = num(t.sp);
+        if (sp > 0) {
+          // PRTS 备注 "仅伤害量不为0且能够触发受击回复的伤害才能触发此天赋": any such damage, not only an enemy attack
+          // (a zone tick, the 源石溶剂 drain — player report D1 audit)
+          onDamagedOn(battle, unit, (ctx) => {
+            if (!hurtSpDamage(ctx) || !up(unit)) return;
+            giveSp(unit, sp);
+            const mates = alliesInGridOf(battle, unit, grid ?? [[1, 0], [0, -1], [0, 1], [-1, 0]]).filter((a) => a !== unit && a.skill && !a.skill.noSkill);
+            const m = battle.rng.pick(mates);
+            if (m) giveSp(m, sp);
+          });
+        }
+        statBuff(battle, unit, 'talent:liskam', { resFlat: num(talentBb(chess, 1).magic_resistance) });
+      } }],
+    };
+  },
+};
@@ -0,0 +1,21 @@
+// server/sim/content/kits/ops/chess_char_2_01-excu.js — 送葬人 (char_279_excu) kit, tier 2.
+// Conventions of the tier-2 kits: ../shared/tier2.js; kit contract and rules: ../README.md.
+
+import { num, talentBb, statBuff, batMod } from '../shared/tier1.js';
+
+export default {
+  // ---------------------------------------------------------------------------------------------------------------
+  // 2_01 送葬人 最终旅程: normal attacks become double hits, base attack time +base_attack_time s (−0.5 on 2.3 s
+  // "少量缩短"). 终结改装: ignore def_penetrate_fixed DEF. (Trait: every enemy in range, ×atk_scale on its front row —
+  // reaperrange profile.)
+  //
+  // S1 铳口收束 (alt): ATK +atk; "攻击时对攻击范围内的所有敌人应用特性加成" — every enemy in range takes the trait's
+  // front-row multiplier (profile frontScale: trait atk_scale 1.5, elite module 1.6, elite without module 1.5).
+  chess_char_2_01_a: (bb, chess) => ({
+    skill: { kind: 'duration', mods: { batPct: batMod(bb.base_attack_time, chess) }, attack: { hits: 2 } },
+    skills: {
+      skchr_excu_1: { kind: 'duration', mods: { atkPct: num(bb.atk) }, attack: { dmgMul: (battle, u) => num(u.profile?.frontScale, 1.5) } },
+    },
+    talents: [{ install(battle, unit) { statBuff(battle, unit, 'talent:excu', { defIgnoreFlat: num(talentBb(chess, 0).def_penetrate_fixed) }); } }],
+  }),
+};
@@ -0,0 +1,36 @@
+// server/sim/content/kits/ops/chess_char_2_02-silent.js — 赫默 (char_108_silent) kit, tier 2.
+// Conventions of the tier-2 kits: ../shared/tier2.js; kit contract and rules: ../README.md.
+
+import { releaseSkillSummon } from '../../tokens.js';
+import { num, talentBb, traitBb, installAura } from '../shared/tier1.js';
+
+export default {
+  // ---------------------------------------------------------------------------------------------------------------
+  // 2_02 赫默 医疗无人机 (AUTO, heal trigger): "获得一个医疗无人机 / 最多可库存1个无人机；无人机投入战场后治疗周围友军，
+  // 10秒后自动销毁" — the 医疗探机 is a hand piece the player places (user playtest #6; PRTS 卫戍协议/帮助): each cast gives
+  // one (stock ≤ cnt) and the placed piece takes the field on its own tile (tokens.js releaseSkillSummon: not at the
+  // battle start — user playtest #4; not placed ⇒ no drone); it heals around itself and self-destructs after 10 s (token
+  // kit). 强化注射: every 【医疗】 operator on the field ASPD +attack_speed. Elite module (PHY-Y): heals on ground units
+  // ×heal_scale (module 'none': no bonus).
+  // S1 治疗强化·γ型 (alt): ATK +atk for its duration (no drone).
+  chess_char_2_02_a: (bb, chess) => {
+    const tokId = chess?.skill?.overrideTokenKey ?? (chess?.tokens ?? [])[0] ?? 'token_10000_silent_healrb';
+    const cnt = Math.max(1, Math.floor(num(bb.cnt, 1)));
+    const t = talentBb(chess, 0);
+    const tb = traitBb(chess);
+    return {
+      skill: {
+        kind: 'instant', heal: true,
+        onStart({ battle, unit }) { releaseSkillSummon(battle, unit, tokId, { cap: cnt }); },
+      },
+      skills: { 'skcom_heal_up[3]': { kind: 'duration', heal: true, mods: { atkPct: num(bb.atk) } } },
+      talents: [{ install(battle, unit) {
+        const v = num(t.attack_speed);
+        if (v) installAura(battle, unit, { key: 'talent:silent', value: v, select: (a) => a.kind === 'op' && a.def.profession === 'MEDIC', mods: { aspd: v } });
+        if (num(tb.heal_scale, 1) !== 1) {
+          battle.on('heal', (ctx) => { if (ctx.source === unit && ctx.target.ground) ctx.amount *= num(tb.heal_scale, 1); }, { owner: unit });
+        }
+      } }],
+    };
+  },
+};
@@ -0,0 +1,39 @@
+// server/sim/content/kits/ops/chess_char_2_03-slchan.js — 崖心 (char_173_slchan) kit, tier 2 (hidden).
+// Conventions of the tier-2 kits: ../shared/tier2.js; kit contract and rules: ../README.md.
+
+import { num, talentBb, traitBb, enemiesInGrid, toggleBuff } from '../shared/tier1.js';
+
+export default {
+  // ---------------------------------------------------------------------------------------------------------------
+  // 2_03 崖心 (hidden) 束缚链: up to max_target enemies in the large front grid are dragged (force 1 = 中力; Battle.pullToFront:
+  // the official 力度 − 重量 pull — weight ≤ 1 all the way in front of her, 2 a third of the way, 3 barely, ≥ 4 not at all),
+  // take atk_scale × ATK true damage and are stunned `stun` s. 雪境猎手: ATK/DEF +atk/+def while not blocking.
+  // Elite module (HOK-X, trait value/dist): dragged enemies take `value` arts per `dist` tiles travelled.
+  chess_char_2_03_a: (bb, chess, def) => {
+    const t = talentBb(chess, 0);
+    const tb = traitBb(chess);
+    const force = num(bb.force, 1);
+    return {
+      skill: {
+        kind: 'instant',
+        onStart({ battle, unit }) {
+          const foes = enemiesInGrid(battle, unit, def?.skill?.rangeGrid ?? null, { n: Math.max(1, Math.floor(num(bb.max_target, 1))) });
+          for (const e of foes) {
+            const sx = e.x, sy = e.y;
+            const moved = battle.pullToFront(e, unit, force);
+            battle.fx('pull', { x: e.x, y: e.y, id: e.id, fromX: sx, fromY: sy });
+            if (moved > 0 && num(tb.value) > 0) {
+              battle.dealDamage(unit, e, { amount: num(tb.value) * moved / Math.max(0.01, num(tb.dist, 1)), type: 'arts', isSkill: true, canDodge: false, tags: ['drag'] });
+            }
+            if (!e.alive) continue;
+            battle.dealDamage(unit, e, { amount: unit.s.atk * num(bb.atk_scale), type: 'true', isSkill: true, tags: ['skill'] });
+            if (e.alive) battle.applyStatus(e, 'stun', { duration: num(bb.stun), source: unit });
+          }
+        },
+      },
+      talents: [{ install(battle, unit) {
+        if (num(t.atk) || num(t.def)) toggleBuff(battle, unit, 'slchan:hunter', () => unit.blocking.length === 0, { atkPct: num(t.atk), defPct: num(t.def) });
+      } }],
+    };
+  },
+};
@@ -0,0 +1,49 @@
+// server/sim/content/kits/ops/chess_char_2_04-grabds.js — 小满 (char_4122_grabds) kit, tier 2.
+// Conventions of the tier-2 kits: ../shared/tier2.js; kit contract and rules: ../README.md.
+
+import {
+  num, talentBb, moduleBb, traitBb, enemiesInGrid, enemyInRange, statBuff, spTimeBonus, instantKind,
+} from '../shared/tier1.js';
+
+export default {
+  // ---------------------------------------------------------------------------------------------------------------
+  // 2_04 小满 乡音沉沉: stops attacking and puts max_target enemies in range to sleep `sleep` s; afterwards ASPD
+  // +attack_speed and attacks max_target enemies. 好好听话: ASPD +attack_speed; vs 【野生动物】 (tag `infection`,
+  // "野生的被感染生物") the trait 停顿 lasts +sluggish_addition s. Elite module (DEC-X): +sp_recovery_per_sec SP/s with
+  // an enemy in range.
+  // S1 竹笛飞声 (alt, 2 charges): the next attack deals atk_scale × ATK arts and hits one more enemy (+1 target).
+  chess_char_2_04_a: (bb, chess, def) => {
+    const t = talentBb(chess, 0);
+    const tb = traitBb(chess);
+    const n = Math.max(1, Math.floor(num(bb.max_target, 1)));
+    const sleep = num(bb.sleep);
+    return {
+      trait: {
+        onHitStatus: null,
+        canAttack: (battle, u) => !(u.skill?.active && battle.time < (u.mem.grainQuietUntil ?? -1)),
+        afterHit(battle, u, target) {
+          if (!target || !target.alive || target.side !== 'enemy') return;
+          const beast = (target.def?.tags || []).includes('infection');
+          battle.applyStatus(target, 'sluggish', { duration: num(tb.sluggish, 0.8) + (beast ? num(t.sluggish_addition) : 0), source: u });
+        },
+      },
+      skill: {
+        kind: 'duration', mods: { aspd: num(bb.attack_speed) },
+        targeting: { maxTargets: n, rangeGrid: def?.skill?.rangeGrid ?? null },
+        onStart({ battle, unit }) {
+          unit.mem.grainQuietUntil = battle.time + sleep;
+          for (const e of enemiesInGrid(battle, unit, def?.skill?.rangeGrid ?? null, { n })) {
+            if (battle.applyStatus(e, 'sleep', { duration: sleep, source: unit })) battle.fx('sleep', { x: e.x, y: e.y, id: e.id });
+          }
+        },
+      },
+      skills: {
+        skchr_grabds_1: { kind: instantKind(def), attack: { atkScale: num(bb.atk_scale, 1), dmgType: 'arts' }, mods: { maxTargets: 1 } },
+      },
+      talents: [{ install(battle, unit) {
+        statBuff(battle, unit, 'talent:grabds', { aspd: num(t.attack_speed) });
+        spTimeBonus(battle, unit, num(moduleBb(chess).sp_recovery_per_sec), () => enemyInRange(battle, unit));
+      } }],
+    };
+  },
+};
@@ -0,0 +1,56 @@
+// server/sim/content/kits/ops/chess_char_2_05-harold.js — 哈洛德 (char_4114_harold) kit, tier 2.
+// Conventions of the tier-2 kits: ../shared/tier2.js; kit contract and rules: ../README.md.
+
+import { COLS, ELEMENT_GAUGE_MAX } from '../../../constants.js';
+import { num, talentBb, up } from '../shared/tier1.js';
+import { onDefaultSkill } from '../shared/tier2.js';
+
+/** Largest element gauge of a unit (every element — 侵蚀 included: the bosses' attacks fill it on operators). */
+const elemLoad = (a) => Math.max(a.elem.burn, a.elem.neural, a.elem.necrosis, a.elem.apoptosis, a.elem.erosion ?? 0);
+
+export default {
+  // ---------------------------------------------------------------------------------------------------------------
+  // 2_05 哈洛德 重症优先: ASPD +attack_speed, heals the ally with the heaviest element damage first; on targets whose
+  // gauge is over half, the element recovery is trait_scale × (the wandermedic trait: ep_heal_ratio × ATK).
+  // 我即军营: allies in range whose gauge is over half take −ep_damage_resistance 元素损伤 — checked on the element hit
+  // itself (`elementHit`, a 元素损伤 multiplier: PRTS 元素 "…后续可应用元素损伤倍率提升/降低等效果"; not `elemTakenMul`,
+  // which is 元素伤害 / 元素脆弱); several 哈洛德 do not stack — the strongest cut applies.
+  // S1 治疗强化·γ型 (alt): ATK +atk; the 重症优先 target order belongs to S2 only.
+  chess_char_2_05_a: (bb, chess) => {
+    const t = talentBb(chess, 0);
+    const s2 = onDefaultSkill(chess);
+    const half = ELEMENT_GAUGE_MAX / 2;
+    const ts = num(bb.trait_scale, 1);
+    return {
+      skill: {
+        kind: 'duration', heal: true, mods: { aspd: num(bb.attack_speed) },
+        onHit({ battle, unit, target }) {
+          if (!target || !unit.mem.haroldHalf?.has(target.id) || !(ts > 1)) return;
+          battle.reduceElement(target, unit.s.atk * (unit.profile.heal?.elementHealRatio ?? 0) * (ts - 1));
+        },
+      },
+      skills: { 'skcom_heal_up[3]': { kind: 'duration', heal: true, mods: { atkPct: num(bb.atk) } } },
+      talents: [{ install(battle, unit) {
+        if (s2) battle.on('beforeAttack', (ctx) => {
+          if (ctx.attacker !== unit || !unit.skill?.active) return;
+          const cands = battle.injuredAlliesInKeys(unit.rangeKeys, unit, true);
+          cands.sort((a, b) => elemLoad(b) - elemLoad(a) || a.hpRatio - b.hpRatio || a.deploySeq - b.deploySeq);
+          if (cands.length) ctx.targets = cands.slice(0, Math.max(1, ctx.targets.length));
+          unit.mem.haroldHalf = new Set(ctx.targets.filter((a) => elemLoad(a) > half).map((a) => a.id));
+        }, { owner: unit });
+        const r = Math.max(0, Math.min(1, num(t.ep_damage_resistance)));
+        if (r > 0) {
+          battle.on('elementHit', (ctx) => {
+            const a = ctx.target, d = ctx.dmg;
+            if (!up(unit) || !a || a.side !== 'ally' || !d || d.type !== 'element' || !(elemLoad(a) > half)) return;
+            if (!(unit.rangeKeySet || new Set(unit.rangeKeys || [])).has(a.tileR * COLS + a.tileC)) return;
+            const prev = d.haroldCut || 0;               // the strongest 我即军营 of the hit only
+            if (r <= prev) return;
+            d.mul *= (1 - r) / (1 - prev);
+            d.haroldCut = r;
+          }, { owner: unit, priority: 20 });
+        }
+      } }],
+    };
+  },
+};
@@ -0,0 +1,85 @@
+// server/sim/content/kits/ops/chess_char_2_06-papyrs.js — 莎草 (char_4139_papyrs) kit, tier 2.
+// Conventions of the tier-2 kits: ../shared/tier2.js; kit contract and rules: ../README.md.
+
+import { bodyInKeys } from '../../../body.js';
+import { num, talentBb, up, alliesInGridOf, instantKind, batMod } from '../shared/tier1.js';
+
+export default {
+  // ---------------------------------------------------------------------------------------------------------------
+  // 2_06 莎草 巧思乍现 (AUTO, 2 charges): the next heal is heal_scale × ATK (chain jumps included) and the talent
+  // barrier is shield_scale_skill × stronger. 博览古卷: every heal gives the target a barrier of attack@scale × ATK for
+  // attack@shield_duration s. (Chain falloff incl. the elite module comes from the chainhealer profile.)
+  // S2 临考发挥 (alt): on start lock the ally in range (not herself, no 禁疗; any profession, summons included) with the
+  // highest max HP; while it runs that ally is the only main heal target, base attack time +base_attack_time s (−1.1
+  // on 2.85), ATK +atk, chain jumps +attack@chain.extra_value. PRTS: "无法可选单位时无法开启技能" — with no lockable
+  // ally the skill never activates (the talent install guards the unit's skill.activate: no skillStart, no
+  // 萨尔贡 / 特质 "开启技能时" gains, SP kept); the skill stops at once when the locked ally leaves the field.
+  chess_char_2_06_a: (bb, chess, def) => {
+    const t = talentBb(chess, 0);
+    const sc = num(t['attack@scale']), sd = num(t['attack@shield_duration'], 8), boost = num(bb.shield_scale_skill, 1);
+    const extra = Math.max(0, Math.floor(num(bb['attack@chain.extra_value'])));
+    const lockOf = (battle, unit) => alliesInGridOf(battle, unit)
+      .filter((a) => a !== unit && !a.s.flags.noHeal && !a.profile?.noHeal)
+      .sort((a, b) => b.s.maxHp - a.s.maxHp || a.deploySeq - b.deploySeq)[0] ?? null;
+    const release = (battle, unit) => {
+      if (unit.mem.papyrsHeal) { unit.profile.heal = unit.mem.papyrsHeal; unit.mem.papyrsHeal = null; }
+      if (unit.mem.papyrsHook) battle.off(unit.mem.papyrsHook);
+      unit.mem.papyrsHook = null;
+      unit.mem.papyrsLock = null;
+      unit.mem.papyrsAbort = false;
+    };
+    return {
+      skill: { kind: instantKind(def), heal: true, attack: { healScale: num(bb.heal_scale, 1) } },
+      skills: {
+        skchr_papyrs_2: {
+          kind: 'duration', heal: true, mods: { atkPct: num(bb.atk), batPct: batMod(bb.base_attack_time, chess) },
+          onStart({ battle, unit, skill }) {
+            release(battle, unit);
+            const lock = lockOf(battle, unit);
+            // (only reachable when a runtime bypasses the activate guard below, e.g. a copied skill: undo on the next tick)
+            if (!lock) { unit.mem.papyrsAbort = true; return; }
+            unit.mem.papyrsLock = lock;
+            const h = unit.profile.heal;
+            if (h && extra > 0) { unit.mem.papyrsHeal = h; unit.profile.heal = { ...h, count: Math.max(1, h.count || 3) + extra }; }
+            unit.mem.papyrsHook = battle.on('beforeAttack', (ctx) => {
+              if (ctx.attacker !== unit || !skill.active) return;
+              const L = unit.mem.papyrsLock;
+              if (L && up(L) && bodyInKeys(L, unit.rangeKeySet)) ctx.targets = [L];
+            }, { owner: unit, priority: 10 });
+            battle.fx('buff', { x: lock.x, y: lock.y, id: lock.id, kind: 'lock' });
+          },
+          onTick({ unit, skill }) {
+            if (unit.mem.papyrsAbort) {
+              // "无法可选单位时无法开启技能": undo the cast, keep the SP
+              unit.mem.papyrsAbort = false;
+              skill.end('noTarget');
+              skill.addCharge(1);
+              return;
+            }
+            const L = unit.mem.papyrsLock;
+            if (!L || !up(L)) skill.end('target');
+          },
+          onEnd({ battle, unit }) { release(battle, unit); },
+        },
+      },
+      talents: [{ install(battle, unit) {
+        const sk = unit.skill;
+        if (sk && sk.id === 'skchr_papyrs_2' && !Object.prototype.hasOwnProperty.call(sk, 'activate')) {
+          // "无法可选单位时无法开启技能": every activation path (DEFAULT heal trigger, carried skill, content) is refused
+          // while no ally can be locked — the charge stays, nothing starts (non-enumerable: never serialised)
+          const activate = sk.activate;
+          Object.defineProperty(sk, 'activate', {
+            configurable: true, writable: true, enumerable: false,
+            value(reason, opts) { return lockOf(battle, unit) ? activate.call(this, reason, opts) : false; },
+          });
+        }
+        if (!(sc > 0)) return;
+        battle.on('heal', (ctx) => {
+          if (ctx.source !== unit || ctx.target === unit && ctx.opts?.regen || !(ctx.amount > 0)) return;
+          const bySkill = !!(unit.skill?.active && unit.skill.pending);
+          battle.addBuff(ctx.target, { key: 'papyrs:shield', shield: unit.s.atk * sc * (bySkill ? boost : 1), duration: sd, source: unit, visible: true, tags: ['talent'] });
+        }, { owner: unit, priority: -10 });
+      } }],
+    };
+  },
+};
@@ -0,0 +1,35 @@
+// server/sim/content/kits/ops/chess_char_2_07-ghost.js — 幽灵鲨 (char_143_ghost) kit, tier 2.
+// Conventions of the tier-2 kits: ../shared/tier2.js; kit contract and rules: ../README.md.
+
+import { num, talentBb, traitBb, onHitBy, statBuff } from '../shared/tier1.js';
+
+export default {
+  // ---------------------------------------------------------------------------------------------------------------
+  // 2_07 幽灵鲨 肉斩骨断: ATK +atk and HP never drops below 1 while active; stunned `stun` s afterwards.
+  // Talent: max HP +max_hp (elite: + hp_recovery_per_sec_by_max_hp_ratio × max HP per s).
+  // Elite module (CEN-X, trait atk_scale): vs enemies it blocks ATK ×atk_scale.
+  // S1 攻击力强化·γ型 (alt): ATK +atk for its duration.
+  chess_char_2_07_a: (bb, chess) => {
+    const t = talentBb(chess, 0);
+    const tb = traitBb(chess);
+    return {
+      skill: {
+        kind: 'duration', mods: { atkPct: num(bb.atk) },
+        onStart({ battle, unit }) {
+          if (unit.mem.undying) battle.off(unit.mem.undying);
+          unit.mem.undying = battle.on('fatal', (c) => { if (c.unit === unit && unit.skill?.active) c.prevented = true; }, { owner: unit, priority: 10 });
+        },
+        onEnd({ battle, unit, reason }) {
+          if (unit.mem.undying) battle.off(unit.mem.undying);
+          unit.mem.undying = null;
+          if (reason !== 'death' && unit.alive && num(bb.stun) > 0) battle.applyStatus(unit, 'stun', { duration: num(bb.stun), source: unit });
+        },
+      },
+      skills: { 'skcom_atk_up[3]': { kind: 'duration', mods: { atkPct: num(bb.atk) } } },
+      talents: [{ install(battle, unit) {
+        statBuff(battle, unit, 'talent:ghost', { hpPct: num(t.max_hp), hpRegenRatio: num(t.hp_recovery_per_sec_by_max_hp_ratio) });
+        if (num(tb.atk_scale, 1) !== 1) onHitBy(battle, unit, ({ target, dmg }) => { if (dmg.isAttack && target.blockedBy) dmg.amount *= num(tb.atk_scale, 1); });
+      } }],
+    };
+  },
+};
@@ -0,0 +1,33 @@
+// server/sim/content/kits/ops/chess_char_2_08-bubble.js — 泡泡 (char_381_bubble) kit, tier 2.
+// Conventions of the tier-2 kits: ../shared/tier2.js; kit contract and rules: ../README.md.
+
+import { num, talentBb, traitBb, byEnemyAttack, onDamagedOn, toggleBuff } from '../shared/tier1.js';
+import { onDefaultSkill } from '../shared/tier2.js';
+
+export default {
+  // ---------------------------------------------------------------------------------------------------------------
+  // 2_08 泡泡 “挨打”: stops attacking; DEF +def, taunt +taunt_level, each attack received returns atk_scale × DEF phys
+  // damage to the attacker. 尖刺盾: attackers get ATK −atk for `duration` s. Elite module (PRO-X): DEF +def while blocking.
+  // S1 防御力强化·β型 (alt, TAKE_DAMAGE from data): DEF +def for its duration; the counter belongs to “挨打” only.
+  chess_char_2_08_a: (bb, chess) => {
+    const t = talentBb(chess, 0);
+    const tb = traitBb(chess);
+    const s2 = onDefaultSkill(chess);
+    return {
+      skill: { kind: 'duration', mods: { defPct: num(bb.def), taunt: num(bb.taunt_level) }, attack: { noAttack: true } },
+      skills: { 'skcom_def_up[2]': { kind: 'duration', mods: { defPct: num(bb.def) } } },
+      talents: [{ install(battle, unit) {
+        onDamagedOn(battle, unit, (ctx) => {
+          if (!byEnemyAttack(ctx) || !unit.alive) return;
+          const src = ctx.source;
+          if (s2 && unit.skill?.active && src.alive) {
+            battle.dealDamage(unit, src, { amount: unit.s.def * num(bb.atk_scale), type: 'phys', isSkill: true, canDodge: false, tags: ['counter'] });
+            battle.fx('counter', { x: src.x, y: src.y, id: unit.id });
+          }
+          if (num(t.atk) < 0 && src.alive) battle.addBuff(src, { key: 'bubble:spike', duration: num(t.duration, 5), mods: { atkPct: num(t.atk) }, refresh: 'extend', source: unit });
+        });
+        if (num(tb.def)) toggleBuff(battle, unit, 'bubble:guard', () => unit.blocking.length > 0, { defPct: num(tb.def) });
+      } }],
+    };
+  },
+};
@@ -0,0 +1,60 @@
+// server/sim/content/kits/ops/chess_char_2_09-humus.js — 休谟斯 (char_491_humus) kit, tier 2.
+// Conventions of the tier-2 kits: ../shared/tier2.js; kit contract and rules: ../README.md.
+
+import { num, talentBb } from '../shared/tier1.js';
+
+export default {
+  // ---------------------------------------------------------------------------------------------------------------
+  // 2_09 休谟斯 高效处理: block +block_cnt; above peak_1.hp_ratio HP ATK +peak_1.atk (精力充沛), above peak_2.hp_ratio
+  // +peak_2.atk. 再回收: healing beyond max HP becomes a barrier, at most max_hp_ratio × max HP.
+  // S1 固废切割 (alt, attack SP): the next attack hits at atk_scale × ATK (every enemy it reaches) and heals her `value`
+  // HP once (a self heal: her trait bars only healing by others; overflow feeds 再回收).
+  chess_char_2_09_a: (bb, chess) => {
+    const t = talentBb(chess, 0);
+    const peaks = [];
+    for (const [k, v] of Object.entries(bb)) {
+      const m = k.match(/\[(peak_\d+)\]\.peak_performance\.(atk|hp_ratio)$/);
+      if (!m) continue;
+      let p = peaks.find((x) => x.id === m[1]);
+      if (!p) peaks.push((p = { id: m[1], atk: 0, hp: 1 }));
+      if (m[2] === 'atk') p.atk = num(v); else p.hp = num(v, 1);
+    }
+    peaks.sort((a, b) => b.hp - a.hp);
+    const key = 'humus:peak';
+    const peak = ({ battle, unit }) => {
+      const lvl = peaks.find((p) => unit.hpRatio > p.hp)?.atk ?? 0;
+      const cur = unit.findBuff(key);
+      if ((cur?.data?.v ?? 0) === lvl) return;
+      if (lvl > 0) battle.addBuff(unit, { key, mods: { atkPct: lvl }, data: { v: lvl }, visible: true, tags: ['skill'] });
+      else battle.removeBuff(unit, key);
+    };
+    return {
+      skill: {
+        kind: 'duration', mods: { blockCnt: num(bb.block_cnt) },
+        onStart: peak, onTick: peak,
+        onEnd({ battle, unit }) { battle.removeBuff(unit, key); },
+      },
+      skills: {
+        skchr_humus_1: {
+          kind: 'instant', attack: { atkScale: num(bb.atk_scale, 1) },
+          onAttack({ battle, unit }) {
+            if (num(bb.value) > 0 && unit.alive) battle.heal(unit, unit, num(bb.value), { self: true, tags: ['skill'] });
+          },
+        },
+      },
+      talents: [{ install(battle, unit) {
+        const ratio = num(t.max_hp_ratio);
+        if (!(ratio > 0)) return;
+        battle.on('heal', (ctx) => {
+          if (ctx.target !== unit || !(ctx.amount > 0)) return;
+          const over = ctx.amount - (unit.s.maxHp - unit.hp);
+          if (!(over > 0)) return;
+          const cur = unit.findBuff('humus:recycle');
+          const have = cur ? cur.shield : 0;
+          const val = Math.min(unit.s.maxHp * ratio, have + over);
+          if (val > have + 1e-6) battle.addBuff(unit, { key: 'humus:recycle', shield: val, source: unit, visible: true, tags: ['talent'] });
+        }, { owner: unit, priority: -50 });
+      } }],
+    };
+  },
+};
@@ -0,0 +1,68 @@
+// server/sim/content/kits/ops/chess_char_2_10-rockr.js — 洛洛 (char_4040_rockr) kit, tier 2.
+// Conventions of the tier-2 kits: ../shared/tier2.js; kit contract and rules: ../README.md.
+
+import { canTargetEnemy } from '../../../targeting.js';
+import { bodyInKeys } from '../../../body.js';
+import { num, talentBb, up } from '../shared/tier1.js';
+import { onDefaultSkill } from '../shared/tier2.js';
+
+export default {
+  // ---------------------------------------------------------------------------------------------------------------
+  // 2_10 洛洛 自负此轭: ASPD +attack_speed; the drones lock on their target until it dies or the skill ends.
+  // 过载 (term ba.overdrive "技能进行到一半时触发额外效果"): the second half of the duration — ATK +atk and the funnel cap
+  // ×scale; when the skill ends she is stunned as long as the overload lasted. 立于磐石: ATK +atk per `interval` s on the
+  // field, up to max_stack_cnt stacks.
+  // S1 战术咏唱·γ型 (alt): ASPD +attack_speed; the target lock belongs to 自负此轭 only.
+  chess_char_2_10_a: (bb, chess) => {
+    const t = talentBb(chess, 0);
+    const s2 = onDefaultSkill(chess);
+    const endOverload = (battle, unit) => {
+      if (unit.mem.rockFunnel) { unit.profile.funnel = unit.mem.rockFunnel; unit.mem.rockFunnel = null; }
+      battle.removeBuff(unit, 'rockr:overload');
+    };
+    return {
+      skill: {
+        kind: 'duration', mods: { aspd: num(bb.attack_speed) },
+        onStart({ battle, unit, skill }) {
+          unit.mem.rockOverAt = battle.time + skill.duration / 2;
+          unit.mem.rockOver = false;
+          unit.mem.rockLock = null;
+        },
+        onTick({ battle, unit }) {
+          if (unit.mem.rockOver || battle.time + 1e-9 < unit.mem.rockOverAt) return;
+          unit.mem.rockOver = true;
+          const f = unit.profile.funnel;
+          if (f) { unit.mem.rockFunnel = f; unit.profile.funnel = { ...f, max: f.max * num(bb.scale, 1) }; }
+          battle.addBuff(unit, { key: 'rockr:overload', mods: { atkPct: num(bb.atk) }, visible: true, tags: ['skill'] });
+          battle.fx('overload', { x: unit.x, y: unit.y, id: unit.id });
+        },
+        onEnd({ battle, unit, reason }) {
+          const over = unit.mem.rockOver ? battle.time - unit.mem.rockOverAt : 0;
+          endOverload(battle, unit);
+          unit.mem.rockOver = false;
+          unit.mem.rockLock = null;
+          if (over > 0 && reason !== 'death' && unit.alive) battle.applyStatus(unit, 'stun', { duration: over, source: unit });
+        },
+      },
+      skills: { 'skcom_magic_rage[3]': { kind: 'duration', mods: { aspd: num(bb.attack_speed) } } },
+      talents: [{ install(battle, unit) {
+        if (s2) battle.on('beforeAttack', (ctx) => {
+          if (ctx.attacker !== unit || !unit.skill?.active) return;
+          const L = unit.mem.rockLock;
+          if (L && L.alive && bodyInKeys(L, unit.rangeKeySet) && canTargetEnemy(unit, L, ctx.profile || unit.profile)) ctx.targets = [L];
+          else unit.mem.rockLock = ctx.targets[0] ?? null;
+        }, { owner: unit });
+        const iv = num(t.interval), max = Math.floor(num(t.max_stack_cnt)), v = num(t.atk);
+        if (!(iv > 0) || !(max > 0) || !v) return;
+        battle.on('tick', () => {
+          if (!up(unit)) return;
+          const n = Math.min(max, Math.floor((battle.time - unit.deployedAt + 1e-9) / iv));
+          const cur = unit.findBuff('rockr:rock');
+          if ((cur ? cur.stacks : 0) === n) return;
+          if (n > 0) battle.addBuff(unit, { key: 'rockr:rock', mods: { atkPct: v }, stacks: n, maxStacks: max, tags: ['talent'] });
+          else battle.removeBuff(unit, 'rockr:rock');
+        }, { owner: unit });
+      } }],
+    };
+  },
+};
@@ -0,0 +1,79 @@
+// server/sim/content/kits/ops/chess_char_2_11-kazema.js — 风丸 (char_4016_kazema) kit, tier 2.
+// Conventions of the tier-2 kits: ../shared/tier2.js; kit contract and rules: ../README.md.
+
+import { num, talentBb, traitBb, up, cheb, freeTileAround } from '../shared/tier1.js';
+
+export default {
+  // ---------------------------------------------------------------------------------------------------------------
+  // 2_11 风丸 纸艺·双影: lose hp_ratio of current HP, ATK +atk, summon the <替身> (overrideTokenKey) on a free melee tile
+  // around her for the skill's duration [ASSUMED lifetime]. 折纸生花: whenever a <替身> appears (the summon, and the
+  // dollkeeper substitution) enemies on the 8 surrounding tiles take damage_scale × its ATK arts — air units too [ASSUMED:
+  // no 对空 note on PRTS; the <替身> itself "可对空"].
+  // Trait substitution: she fights with the <替身>'s stats (the engine already swaps in its HP; the kit swaps ATK/DEF
+  // with flat deltas so %-buffs still apply). Elite module (PUM-X, trait atk): while substituted, ATK +atk.
+  // S1 纸艺·迅击 (alt, attack SP): the next attack hits at atk_scale × ATK and she loses hp_ratio of her MAX HP (PRTS:
+  // ten casts knock her out — the loss can be fatal and so sets off the <替身> substitution).
+  chess_char_2_11_a: (bb, chess) => {
+    const t = talentBb(chess, 0);
+    const tb = traitBb(chess);
+    const tokId = chess?.skill?.overrideTokenKey ?? (chess?.tokens ?? []).find((x) => /shadow|doll/.test(String(x))) ?? 'token_10022_kazema_shadow';
+    const ds = num(t.damage_scale);
+    const origami = (battle, src, atk) => {
+      battle.fx('aoe', { x: src.x, y: src.y, radius: 1.5, id: src.id, skill: 'origami' });
+      if (!(ds > 0)) return;
+      for (const e of battle.enemies) {
+        if (!e.alive || e.hidden || e.s.flags.untargetable || cheb(src, e) > 1) continue;
+        battle.dealDamage(src, e, { amount: atk * ds, type: 'arts', isSkill: true, canDodge: false, tags: ['talent'] });
+      }
+    };
+    return {
+      skill: {
+        kind: 'duration', mods: { atkPct: num(bb.atk) },
+        onStart({ battle, unit }) {
+          const loss = unit.hp * num(bb.hp_ratio);
+          if (loss > 0 && unit.hp - loss >= 1) battle.loseHp(unit, loss, { source: unit });
+          const tile = freeTileAround(battle, unit, (r, c) => battle.grid.canStand(r, c));
+          if (!tile) return;
+          const doll = battle.spawnToken(unit, tokId, tile[0], tile[1], {});
+          if (!doll) return;
+          unit.mem.doll = doll;
+          battle.fx('summon', { x: doll.x, y: doll.y, id: doll.id, token: tokId });
+          origami(battle, doll, doll.s.atk);
+        },
+        onEnd({ battle, unit }) {
+          const d = unit.mem.doll;
+          if (d && d.alive) battle.retreat(d, { reason: 'expired', permanent: true });
+          unit.mem.doll = null;
+        },
+      },
+      skills: {
+        skchr_kazema_1: {
+          kind: 'instant', attack: { atkScale: num(bb.atk_scale, 1) },
+          onAttack({ battle, unit }) {
+            const loss = unit.s.maxHp * num(bb.hp_ratio);
+            if (loss > 0 && unit.alive) battle.loseHp(unit, loss, { source: unit, tags: ['skill'] });
+          },
+        },
+      },
+      talents: [{ install(battle, unit) {
+        const bonus = num(tb.atk);
+        battle.on('tick', () => {
+          const sub = up(unit) && !!unit.findBuff('trait:substitute');
+          if (sub && !unit.mem.kzSub) {
+            unit.mem.kzSub = true;
+            const ts = battle.tokenDef(tokId, unit)?.stats ?? null; // the owner's module variant (DESIGN §16)
+            const mods = {};
+            if (num(ts?.atk) > 0) mods.atkFlat = num(ts.atk) - unit.base.atk;
+            if (ts && Number.isFinite(ts.def)) mods.defFlat = ts.def - unit.base.def;
+            if (bonus > 0) mods.atkPct = bonus;
+            battle.addBuff(unit, { key: 'kazema:doll', mods, tags: ['trait'] });
+            origami(battle, unit, unit.s.atk);
+          } else if (!sub && unit.mem.kzSub) {
+            unit.mem.kzSub = false;
+            battle.removeBuff(unit, 'kazema:doll');
+          }
+        }, { owner: unit });
+      } }],
+    };
+  },
+};
@@ -0,0 +1,65 @@
+// server/sim/content/kits/ops/chess_char_2_12-gravel.js — 砾 (char_237_gravel) kit, tier 2.
+// Conventions of the tier-2 kits: ../shared/tier2.js; kit contract and rules: ../README.md.
+
+import { num, talentBb, installAura } from '../shared/tier1.js';
+
+export default {
+  // ---------------------------------------------------------------------------------------------------------------
+  // 2_12 砾 鼠群 (passive): at each deployment a barrier of hp_ratio × max HP that decays to 0 over `duration` s
+  // (capacity stepped once per second; a damaged barrier shrinks in proportion — PRTS).
+  // 快速部署: own deployment cost +cost (−1). Elite 小个子支援: every unit whose initial deployment cost ≤ cond.cost
+  // DEF +def while 砾 is on the field. (Elite module withdraw refund: no manual retreat in battle ⇒ no effect.)
+  // S1 影袭 (alt, passive): at each deployment DEF +def, decaying linearly to 0 over `duration` s, updated once per
+  // second (PRTS: "防御力加成每秒更新一次").
+  chess_char_2_12_a: (bb, chess) => {
+    const t = talentBb(chess, 0);
+    return {
+      skill: {
+        kind: 'passive',
+        onStart({ battle, unit }) {
+          const total = unit.s.maxHp * num(bb.hp_ratio);
+          const dur = num(bb.duration, 10);
+          if (!(total > 0) || !(dur > 0)) return;
+          let k = 0;
+          battle.addBuff(unit, {
+            key: 'gravel:rats', shield: total, duration: dur, interval: 1, visible: true, tags: ['skill'],
+            // PRTS: "屏障最大容量每秒更新一次；受到伤害后，剩余容量根据屏障最大容量等比变化" — the capacity steps down
+            // once per second and what is left of the barrier scales with it (never a plain cap)
+            onTick: ({ unit: u, buff }) => {
+              const prev = Math.max(0, dur - k) / dur;
+              k++;
+              const next = Math.max(0, dur - k) / dur;
+              if (prev > 0 && buff.shield > 0) { buff.shield *= next / prev; u.markDirty(); }
+            },
+          });
+          battle.fx('shield', { x: unit.x, y: unit.y, id: unit.id });
+        },
+      },
+      skills: {
+        skchr_gravel_1: {
+          kind: 'passive',
+          onStart({ battle, unit }) {
+            const v = num(bb.def), dur = num(bb.duration);
+            if (!(v > 0) || !(dur > 0)) return;
+            let k = 0;
+            battle.addBuff(unit, {
+              key: 'gravel:shadow', duration: dur, mods: { defPct: v }, interval: 1, visible: true, tags: ['skill'],
+              onTick: ({ unit: u, buff }) => {
+                k++;
+                buff.mods = { defPct: v * Math.max(0, dur - k) / dur };
+                u.markDirty();
+              },
+            });
+            battle.fx('buff', { x: unit.x, y: unit.y, id: unit.id, kind: 'def' });
+          },
+        },
+      },
+      talents: [{ install(battle, unit) {
+        const c = num(t.cost);
+        if (c) unit.base.cost = Math.max(0, unit.base.cost + c);
+        const d = num(t.def), lim = t['cond.cost'];
+        if (d && lim != null) installAura(battle, unit, { key: 'talent:gravel', value: d, select: (a) => num(a.def?.stats?.cost, Infinity) <= num(lim), mods: { defPct: d } });
+      } }],
+    };
+  },
+};
@@ -0,0 +1,78 @@
+// server/sim/content/kits/ops/chess_char_2_13-tippi.js — 蒂比 (char_4191_tippi) kit, tier 2.
+// Conventions of the tier-2 kits: ../shared/tier2.js; kit contract and rules: ../README.md.
+
+import { num, talentBb, up, onHitOn } from '../shared/tier1.js';
+import { onDefaultSkill } from '../shared/tier2.js';
+
+/**
+ * 起飞 of 蒂比's skills (gamedata_const ba.liftoff "不阻挡地面敌人且不会被地面敌人攻击，可以阻挡飞行敌人"): the skill's flags
+ * `liftoff` (no ground enemy blocked — Battle._blockerFor; 对地规避 — targeting.js evadesGround: no ground enemy selects
+ * her, while what selects nobody still lands — 无视无法选择 abilities, direct picks, flying units' blasts, 无来源 damage, the
+ * ticks of a debuff already on her) and `blockFly` (blocks flyers at the air radius). She stays a ground unit on her tile (PRTS 行动方式 "起飞的
+ * 干员仍然是地面单位": `unit.ground` unchanged — 隐德来希's 血镰 still counts her; 地面干员 bonds / items read her position).
+ */
+const LIFTOFF_FLAGS = Object.freeze({ blockFly: true, liftoff: true });
+/** 蒂比 take-off: the ground enemies she blocked walk on. */
+function tippiTakeOff({ battle, unit }) {
+  battle.releaseBlocked(unit);
+  battle.fx('takeoff', { x: unit.x, y: unit.y, id: unit.id });
+}
+/** 蒂比 landing when the airborne skill ends: the flyers she held are released. */
+function tippiLand({ battle, unit }) {
+  battle.releaseBlocked(unit);
+}
+
+export default {
+  // ---------------------------------------------------------------------------------------------------------------
+  // 2_13 蒂比 紧急赶场通知 (AUTO): "受到攻击后触发" is officially "受到伤害前触发" (PRTS 修正 原因 6; 备注 "在受到伤害前自动
+  // 触发技能…若本次伤害为物理或法术，再将本次伤害闪避") — any incoming damage instance (an attack, a zone tick, the 源石溶剂
+  // drain; never a 流失, which has no `hit`) sets it off (the kit is the only trigger: the engine rule is disabled) and a
+  // physical/arts one is dodged; takes off for the duration: skill range, ATK +atk, attacks become 3 shots, blocks flying
+  // (not ground) enemies. Trait "起飞后能够阻挡2个飞行敌人": flying enemies are blocked only while airborne. 片场工作指南
+  // ("若最近N秒内未受伤害" — 修正 原文 攻击): if no damage for stack_time s, the next physical/arts damage is dodged (prob);
+  // every damage instance restarts that timer (dodged or not; a 流失 does not — PRTS 备注).
+  // S1 专业喷绘技巧 (alt, DEFAULT trigger from data): takes off at once for its duration — skill range, ATK +atk, blocks
+  // flyers only; no triple shot, and incoming attacks never set it off.
+  // Both take off as 起飞 (LIFTOFF_FLAGS): she blocks no ground enemy and none selects her (对地规避), so a ground enemy's
+  // selected damage refused on the way never reaches her `hit` and neither sets off S2 nor restarts 片场工作指南.
+  chess_char_2_13_a: (bb, chess, def) => {
+    const t = talentBb(chess, 0);
+    const s2 = onDefaultSkill(chess);
+    return {
+      trait: { blockFly: false },
+      skill: {
+        kind: 'duration', trigger: { rule: 'CUSTOM_RANGE', grid: [] }, // never by the engine: the hit handler below
+        mods: { atkPct: num(bb.atk) }, flags: LIFTOFF_FLAGS,
+        targeting: { rangeGrid: def?.skill?.rangeGrid ?? null },
+        attack: { hits: 3 },
+        onStart: tippiTakeOff,
+        onEnd: tippiLand,
+      },
+      skills: {
+        skchr_tippi_1: {
+          kind: 'duration', mods: { atkPct: num(bb.atk) }, flags: LIFTOFF_FLAGS,
+          targeting: { rangeGrid: def?.skill?.rangeGrid ?? null },
+          onStart: tippiTakeOff,
+          onEnd: tippiLand,
+        },
+      },
+      talents: [{ install(battle, unit) {
+        battle.removeBuff(unit, 'trait:skywalker'); // the profession grants blockFly permanently; here only airborne
+        const st = num(t.stack_time), p = num(t.prob, 1);
+        let last = -Infinity;
+        battle.on('deploy', ({ unit: u }) => { if (u === unit) last = battle.time - st; }, { owner: unit });
+        onHitOn(battle, unit, (ctx) => {
+          const { dmg } = ctx;
+          if (!dmg || dmg.cancel || !up(unit)) return;
+          const dodgeable = dmg.type === 'phys' || dmg.type === 'arts';
+          const sk = unit.skill;
+          let dodged = false;
+          if (s2 && sk && sk.ready && !sk.active && unit.canAct && !unit.s.flags.silence && sk.activate('TAKE_DAMAGE')) dodged = dodgeable;
+          else if (dodgeable && st > 0 && battle.time - last + 1e-9 >= st && battle.rng.chance(p)) dodged = true;
+          last = battle.time;
+          if (dodged) { dmg.cancel = true; battle.fx('dodge', { x: unit.x, y: unit.y, id: unit.id }); }
+        }, 5);
+      } }],
+    };
+  },
+};
@@ -0,0 +1,29 @@
+// server/sim/content/kits/ops/chess_char_2_14-flower.js — 调香师 (char_181_flower) kit, tier 2.
+// Conventions of the tier-2 kits: ../shared/tier2.js; kit contract and rules: ../README.md.
+
+import { num, talentBb, moduleBb, up } from '../shared/tier1.js';
+
+export default {
+  // ---------------------------------------------------------------------------------------------------------------
+  // 2_14 调香师 精调: ASPD +attack_speed (−50), ATK +atk. 熏衣草: every ally on the field recovers
+  // atk_to_hp_recovery_ratio × ATK HP per second. Elite module (RIN-Y, hidden attack@max_target): heals 4 allies.
+  // S1 治疗强化·β型 (alt): ATK +atk for its duration.
+  chess_char_2_14_a: (bb, chess) => {
+    const t = talentBb(chess, 0);
+    const cnt = Math.floor(num(moduleBb(chess)['attack@max_target']));
+    return {
+      trait: cnt > 0 ? { heal: { mode: 'multi', count: cnt } } : undefined,
+      skill: { kind: 'duration', heal: true, mods: { atkPct: num(bb.atk), aspd: num(bb.attack_speed) } },
+      skills: { 'skcom_heal_up[2]': { kind: 'duration', heal: true, mods: { atkPct: num(bb.atk) } } },
+      talents: [{ install(battle, unit) {
+        const r = num(t.atk_to_hp_recovery_ratio);
+        if (!(r > 0)) return;
+        battle.every(1, () => {
+          if (!up(unit)) return;
+          const amt = unit.s.atk * r;
+          for (const a of battle.alliesFor(unit)) if (a.hp < a.s.maxHp) battle.heal(unit, a, amt, { aura: true, tags: ['talent'] });
+        }, { owner: unit });
+      } }],
+    };
+  },
+};
@@ -0,0 +1,43 @@
+// server/sim/content/kits/ops/chess_char_2_15-akkord.js — 协律 (char_4051_akkord) kit, tier 2 (hidden).
+// Conventions of the tier-2 kits: ../shared/tier2.js; kit contract and rules: ../README.md.
+
+import { num, talentBb, traitBb, onHitBy, alliesInGridOf, toggleBuff } from '../shared/tier1.js';
+
+export default {
+  // ---------------------------------------------------------------------------------------------------------------
+  // 2_15 协律 (hidden) 震爆调谐: ATK +atk; each attack sets off a sonic boom at every other operator in range:
+  // attack@aoe_atk_scale × ATK arts within attack@range_radius. 律脉同构: ATK +atk with another operator in range.
+  // Elite module (BLA-X): damage grows with distance, up to +damage_scale at max_dist tiles.
+  chess_char_2_15_a: (bb, chess) => {
+    const t = talentBb(chess, 0);
+    const tb = traitBb(chess);
+    const rad = num(bb['attack@range_radius'], 0.9), sc = num(bb['attack@aoe_atk_scale']);
+    return {
+      skill: {
+        kind: 'duration', mods: { atkPct: num(bb.atk) },
+        onAttack({ battle, unit }) {
+          if (!(sc > 0)) return;
+          for (const a of alliesInGridOf(battle, unit)) {
+            if (a === unit || a.kind !== 'op') continue;
+            battle.fx('sonic', { x: a.x, y: a.y, radius: rad, id: unit.id });
+            for (const e of battle.foesInRadius(a.x, a.y, rad)) {
+              if (!e.s.flags.untargetable) battle.dealDamage(unit, e, { amount: unit.s.atk * sc, type: 'arts', isSkill: true, isSplash: true, tags: ['sonic'] });
+            }
+          }
+        },
+      },
+      talents: [{ install(battle, unit) {
+        const v = num(t.atk);
+        if (v) toggleBuff(battle, unit, 'akkord:sync', () => alliesInGridOf(battle, unit).some((a) => a !== unit && a.kind === 'op'), { atkPct: v });
+        if (tb.damage_scale != null) {
+          const mn = num(tb.min_dist), mx = num(tb.max_dist, 4), ds = num(tb.damage_scale);
+          onHitBy(battle, unit, ({ target, dmg }) => {
+            if (!dmg.isAttack) return;
+            const d = Math.hypot(target.x - unit.x, target.y - unit.y);
+            dmg.amount *= 1 + ds * (mx > mn ? Math.max(0, Math.min(1, (d - mn) / (mx - mn))) : 1);
+          });
+        }
+      } }],
+    };
+  },
+};
@@ -0,0 +1,47 @@
+// server/sim/content/kits/ops/chess_char_2_16-whitew.js — 拉普兰德 (char_140_whitew) kit, tier 2.
+// Conventions of the tier-2 kits: ../shared/tier2.js; kit contract and rules: ../README.md.
+
+import { num, talentBb, traitBb, onHitOn } from '../shared/tier1.js';
+
+export default {
+  // ---------------------------------------------------------------------------------------------------------------
+  // 2_16 拉普兰德 狼魂 (AUTO, attack SP): ATK +atk, arts damage, one extra target, ranged attacks no longer reduced.
+  // 精神摧毁: attacks disable the target's abilities (silence) for `duration` s. Elite module (LOR-X, trait
+  // atk_scale_m): attacks add atk_scale_m × ATK arts damage.
+  // S1 日晷 (alt, attack SP, 持续时间无限 ⇒ toggle until she falls): ATK +atk and a `prob` chance to block (抵挡: the
+  // damage instance is negated) each physical damage an enemy deals her.
+  chess_char_2_16_a: (bb, chess) => {
+    const t = talentBb(chess, 0);
+    const tb = traitBb(chess);
+    const trait = {};
+    if (num(t.duration) > 0) trait.onHitStatus = { key: 'silence', duration: num(t.duration) };
+    if (num(tb.atk_scale_m) > 0) {
+      trait.afterHit = (battle, u, target) => {
+        // PRTS 特性备注 "造成预计算的法术附加伤害": 附加伤害 (tag addition — no 叙拉古 6 roll)
+        if (target && target.alive && target.side === 'enemy') battle.dealDamage(u, target, { amount: u.s.atk * num(tb.atk_scale_m), type: 'arts', tags: ['module', 'addition'] });
+      };
+    }
+    return {
+      trait,
+      skill: { kind: 'duration', mods: { atkPct: num(bb.atk) }, targeting: { maxTargets: 2 }, attack: { dmgType: 'arts', dmgMul: () => 1 } },
+      skills: {
+        skchr_whitew_1: {
+          kind: 'toggle', mods: { atkPct: num(bb.atk) },
+          onStart({ battle, unit, skill }) {
+            if (unit.mem.sundial) battle.off(unit.mem.sundial);
+            const p = num(bb.prob);
+            unit.mem.sundial = p > 0 ? onHitOn(battle, unit, ({ source, credit, dmg }) => { // 抵挡 is target-side: a 无来源 burst counts via its credit
+              const src = source || credit;
+              if (!skill.active || dmg.cancel || dmg.type !== 'phys' || !src || src.side !== 'enemy') return;
+              if (battle.rng.chance(p)) { dmg.cancel = true; battle.fx('block', { x: unit.x, y: unit.y, id: unit.id }); }
+            }, 5) : null;
+          },
+          onEnd({ battle, unit }) {
+            if (unit.mem.sundial) battle.off(unit.mem.sundial);
+            unit.mem.sundial = null;
+          },
+        },
+      },
+    };
+  },
+};
@@ -0,0 +1,46 @@
+// server/sim/content/kits/ops/chess_char_2_17-branch.js — 折桠 (char_4207_branch) kit, tier 2.
+// Conventions of the tier-2 kits: ../shared/tier2.js; kit contract and rules: ../README.md.
+
+import { num, talentBb, traitBb, onHitOn, enemiesInGrid } from '../shared/tier1.js';
+
+export default {
+  // ---------------------------------------------------------------------------------------------------------------
+  // 2_17 折桠 生存决心: on start, ground enemies around her (skill grid) 战栗 (tremble: "被阻挡后无法进行普通攻击") for
+  // not_combat s; ATK +atk, DEF +def, hits every blocked enemy. 简易包扎: heals hp_ratio × max HP when the skill ends.
+  // Elite module (UNY-X, trait damage_scale): damage from enemies she blocks ×damage_scale.
+  // S1 绝境抵抗 (alt, TAKE_DAMAGE / hurt SP from data): DEF +def and 抵抗 (−one_minus_status_resistance: control
+  // statuses last half as long) for its duration; 简易包扎 heals at its end too.
+  chess_char_2_17_a: (bb, chess, def) => {
+    const t = talentBb(chess, 0);
+    const tb = traitBb(chess);
+    return {
+      skill: {
+        kind: 'duration', mods: { atkPct: num(bb.atk), defPct: num(bb.def) }, attack: { hitAllBlocked: true },
+        onStart({ battle, unit }) {
+          const grid = def?.skill?.rangeGrid;
+          const foes = grid ? enemiesInGrid(battle, unit, grid, { canHitFly: false, groundOnly: true }) : battle.foesInRadius(unit.x, unit.y, 1.5).filter((e) => !e.isFlying);
+          battle.fx('aoe', { x: unit.x, y: unit.y, radius: 1.5, id: unit.id, skill: 'resolve' });
+          for (const e of foes) battle.applyStatus(e, 'tremble', { duration: num(bb.not_combat), source: unit });
+        },
+      },
+      skills: {
+        skchr_branch_1: {
+          kind: 'duration', mods: { defPct: num(bb.def) },
+          onStart({ battle, unit, skill }) {
+            const v = Math.min(0.95, Math.max(0, -num(bb.one_minus_status_resistance)));
+            if (v > 0) battle.applyStatus(unit, 'resist', { duration: skill.timeLeft, value: v, source: unit });
+          },
+        },
+      },
+      talents: [{ install(battle, unit) {
+        const hr = num(t.hp_ratio);
+        if (hr > 0) {
+          battle.on('skillEnd', ({ unit: u, reason }) => {
+            if (u === unit && reason !== 'death' && unit.alive) battle.heal(unit, unit, unit.s.maxHp * hr, { self: true, tags: ['talent'] });
+          }, { owner: unit });
+        }
+        if (tb.damage_scale != null) onHitOn(battle, unit, ({ source, dmg }) => { if (source && source.blockedBy === unit) dmg.mul *= num(tb.damage_scale, 1); });
+      } }],
+    };
+  },
+};
@@ -0,0 +1,37 @@
+// server/sim/content/kits/ops/chess_char_2_18-ashlok.js — 灰毫 (char_431_ashlok) kit, tier 2.
+// Conventions of the tier-2 kits: ../shared/tier2.js; kit contract and rules: ../README.md.
+
+import { num, talentBb, traitBb, onHitBy, batMod } from '../shared/tier1.js';
+
+export default {
+  // ---------------------------------------------------------------------------------------------------------------
+  // 2_18 灰毫 攻击力强化·γ型 (DEFAULT, like S2: the owner's deliberate deviation from the 重装 TAKE_DAMAGE row, data
+  // TRIGGER_DEVIATIONS, DESIGN §21.29): ATK +atk. 炮术研习: ATK +atk, or +ashlok_t_1.atk when the `cnt` orthogonal
+  // tiles around her are all ground (LOW). Elite module (FOR-X, trait atk_scale): vs blocked enemies ATK ×atk_scale.
+  // S2 专注轰击 (alt): block count 0 (noBlock: releases what she holds), only ranged (splash) attacks, base attack time
+  // +base_attack_time s (−0.4 / −0.5 on 2.8), ATK +atk.
+  chess_char_2_18_a: (bb, chess) => {
+    const t = talentBb(chess, 0);
+    const tb = traitBb(chess);
+    return {
+      skill: { kind: 'duration', mods: { atkPct: num(bb.atk) } },
+      skills: {
+        skchr_ashlok_2: {
+          kind: 'duration', mods: { atkPct: num(bb.atk), batPct: batMod(bb.base_attack_time, chess) }, flags: { noBlock: true },
+          attack: { fortress: false, _fortressMelee: false },
+        },
+      },
+      talents: [{ install(battle, unit) {
+        battle.on('deploy', ({ unit: u }) => {
+          if (u !== unit) return;
+          const r = unit.tileR, c = unit.tileC;
+          const low = [[1, 0], [-1, 0], [0, 1], [0, -1]].filter(([dr, dc]) => battle.grid.isLow(r + dr, c + dc)).length;
+          const ground = low >= num(t.cnt, 4);
+          const v = ground ? num(t['ashlok_t_1.atk'], num(t.atk)) : num(t.atk);
+          if (v) battle.addBuff(unit, { key: 'talent:ashlok', mods: { atkPct: v }, data: { ground }, tags: ['talent'] });
+        }, { owner: unit });
+        if (num(tb.atk_scale, 1) !== 1) onHitBy(battle, unit, ({ target, dmg }) => { if (dmg.isAttack && target.blockedBy) dmg.amount *= num(tb.atk_scale, 1); });
+      } }],
+    };
+  },
+};
@@ -0,0 +1,49 @@
+// server/sim/content/kits/ops/chess_char_2_19-tinman.js — 锡人 (char_4151_tinman) kit, tier 2.
+// Conventions of the tier-2 kits: ../shared/tier2.js; kit contract and rules: ../README.md.
+
+import { num, talentBb, enemiesInGrid, instantKind } from '../shared/tier1.js';
+import { tinmanKit } from './chess_char_1_16-tinman.js';
+
+export default {
+  // ---------------------------------------------------------------------------------------------------------------
+  // 2_19 锡人 “大拉里”: see tinmanKit (chess_char_1_16-tinman.js).
+  // S1 “老科利” (alt, attack SP, needs a target): throws an alchemy unit at the target (ground first); for
+  // projectile_delay_time s ground enemies within projectile_range tiles are 虚弱 (weaken −atk) and take atk_scale ×
+  // ATK arts per second (ATK cached at the cast; damage over time, so the elite 凋敝魂灵 ×skill@damage_scale applies;
+  // the zone counts for the module's SP bonus and outlives her).
+  chess_char_2_19_a: (bb, chess, def) => {
+    const k = tinmanKit(bb, chess, def);
+    const dur = num(bb.projectile_delay_time, 8), radius = num(bb.projectile_range, 1), dmgScale = num(bb.atk_scale);
+    const weak = Math.min(1, Math.max(0, -num(bb.atk)));
+    const wither = num(talentBb(chess, 1)['skill@damage_scale'], 1);
+    const STEP = 0.25; // weaken refresh cadence (damage every 1 s)
+    return {
+      ...k,
+      skills: {
+        ...(k.skills || {}),
+        skchr_tinman_1: {
+          kind: instantKind(def),
+          onStart({ battle, unit }) {
+            const tgt = enemiesInGrid(battle, unit, null, { n: 1, groundOnly: true })[0] ?? enemiesInGrid(battle, unit, null, { n: 1 })[0];
+            const x = tgt ? tgt.x : unit.x + unit.fwd[1], y = tgt ? tgt.y : unit.y + unit.fwd[0];
+            const atk = unit.s.atk;
+            const n = Math.max(1, Math.round(dur / STEP)), per = Math.max(1, Math.round(1 / STEP));
+            let i = 0;
+            unit.mem.tinZones = (unit.mem.tinZones ?? 0) + 1;
+            battle.fx('zone', { x, y, radius, dur, id: unit.id, skill: 'tinman1' });
+            battle.every(STEP, (b, sc) => {
+              const pulse = i % per === 0;
+              for (const e of b.foesInRadius(x, y, radius)) {
+                if (e.isFlying || e.s.flags.untargetable) continue;
+                if (weak > 0) b.applyStatus(e, 'weaken', { duration: STEP + 0.05, value: weak, source: unit });
+                if (wither > 1) b.addBuff(e, { key: 'tinman:wither', duration: STEP + 0.05, data: { mul: wither }, source: unit });
+                if (pulse && dmgScale > 0) b.dealDamage(unit, e, { amount: atk * dmgScale, type: 'arts', isSkill: true, canDodge: false, tags: ['dot', 'zone'] });
+              }
+              if (++i >= n) { sc.cancel(); unit.mem.tinZones = Math.max(0, (unit.mem.tinZones ?? 1) - 1); }
+            }, { immediate: true });
+          },
+        },
+      },
+    };
+  },
+};
@@ -0,0 +1,49 @@
+// server/sim/content/kits/ops/chess_char_3_01-angel.js — 能天使 (char_103_angel) kit, tier 3.
+// Conventions of the tier-3 kits: ../shared/tier3.js; kit contract and rules: ../README.md.
+
+import { num, defOf, talentBb, traitBb, altSkills, instantKindOf, groundAspd, alive, fx } from '../shared/tier3.js';
+
+export default {
+  // ---- 3_01 能天使 · 速射手 — S3 过载模式: 5 连射 + 攻击间隔缩短; 快速弹匣 ASPD; 天使的祝福 (self + one random ally)
+  //      S1 冲锋模式: next attack = 3 shots × atk_scale; S2 扫射模式: 4 shots × attack@atk_scale per attack for 15 s;
+  //      精锐 module MAR-Y: ASPD + while a ground enemy is in range (MAR-X fly × = profession layer)
+  chess_char_3_01_a: (bb, chess, def) => {
+    const d = defOf(chess, def);
+    const t0 = talentBb(d, 0), t1 = talentBb(d, 1);
+    const tb = traitBb(d);
+    const bless = { atkPct: num(t1.atk), hpPct: num(t1.max_hp) };
+    const shots = (v) => Math.max(1, Math.floor(num(v, 1)));
+    const kit = {
+      skill: {
+        kind: 'duration',
+        mods: { batPct: num(bb.base_attack_time) },
+        attack: { atkScale: num(bb['attack@atk_scale'], 1), hits: Math.max(1, Math.floor(num(bb['attack@times'], 1))) },
+      },
+      skills: altSkills(chess, d, bb, {
+        skchr_angel_1: (s) => ({ kind: instantKindOf(s), attack: { atkScale: num(s.bb.atk_scale, 1), hits: shots(s.bb.times) } }),
+        skchr_angel_2: (s) => ({ kind: 'duration', attack: { atkScale: num(s.bb['attack@atk_scale'], 1), hits: shots(s.bb['attack@times']) } }),
+      }),
+      talents: [
+        { install(battle, unit) { battle.addBuff(unit, { key: 'talent:angel_mag', mods: { aspd: num(t0.attack_speed) }, persist: true, allowDead: true }); } },
+        { install(battle, unit) {
+          battle.addBuff(unit, { key: 'talent:angel_bless', mods: { ...bless }, persist: true, allowDead: true });
+          battle.on('deploy', (ctx) => {
+            if (ctx.unit !== unit) return;
+            // after the whole board is deployed (the initial deployment goes one unit after another)
+            battle.after(0, () => {
+              if (!alive(unit)) return;
+              const cands = battle.allies(unit.ownerId).filter((a) => a !== unit && a.kind === 'op' && !a.findBuff('talent:angel_bless_ally'));
+              const pick = battle.rng.pick(cands);
+              if (!pick) return;
+              battle.addBuff(pick, { key: 'talent:angel_bless_ally', mods: { ...bless }, persist: true, source: unit, visible: true });
+              fx(battle, 'buff', pick, { src: unit.id, talent: 'angel_bless' });
+            }, { owner: unit });
+          }, { owner: unit });
+        } },
+      ],
+    };
+    // MAR-Y trait "范围内存在地面敌人时攻击速度+8" (bb attack_speed, cnt = ground enemies needed)
+    if (num(tb.attack_speed) > 0) kit.install = groundAspd('trait:angel_ground', num(tb.attack_speed), Math.floor(num(tb.cnt, 1)));
+    return kit;
+  },
+};
@@ -0,0 +1,67 @@
+// server/sim/content/kits/ops/chess_char_3_02-ayer.js — 断崖 (char_294_ayer) kit, tier 3.
+// Conventions of the tier-3 kits: ../shared/tier3.js; kit contract and rules: ../README.md.
+
+import {
+  num, defOf, talentBb, traitBb, altSkills, instantKindOf, alive, gridKeys, fx, copyGrid, NINE, aura,
+} from '../shared/tier3.js';
+
+export default {
+  // ---- 3_02 断崖 · 领主 — S2 浮游刃启动: arts, wider range, each attack hits every enemy blocked by allies around her
+  chess_char_3_02_a: (bb, chess, def) => {
+    const d = defOf(chess, def);
+    const t0 = talentBb(d, 0);
+    const tb = traitBb(d);
+    const tGrid = copyGrid(d.talents?.[0]?.rangeGrid) ?? NINE;
+    const extra = num(bb.atk_scale, 1);
+    const moduleArts = num(tb.atk_scale_m, 0);
+    const skillGrid = copyGrid(d.skill?.rangeGrid);
+    const kit = {
+      skill: {
+        kind: 'duration',
+        attack: { dmgType: 'arts', atkScale: num(bb['attack@atk_scale'], 1) },
+        onAttack({ battle, unit }) {
+          // "周围8格友方单位阻挡的所有敌人": the 8 tiles around her (her own tile is not one of them — the talent
+          // says "自身与周围8格" when it means both)
+          const seen = new Set();
+          for (const a of battle.allyUnits) {
+            if (a === unit || !alive(a) || a.kind === 'device' || !a.blocking.length) continue;
+            if (Math.abs(a.tileR - unit.tileR) > 1 || Math.abs(a.tileC - unit.tileC) > 1) continue;
+            for (const e of a.blocking) {
+              if (!e.alive || seen.has(e)) continue;
+              seen.add(e);
+              battle.dealDamage(unit, e, { amount: unit.s.atk * extra, type: 'arts', isSkill: true, tags: ['skill', 'melee', 'ayerBlade'] });
+              fx(battle, 'strike', e, { src: unit.id, skill: 'ayer_2' });
+            }
+          }
+        },
+      },
+      // S1 多导向散射弹丸: next attack hits up to max_target enemies in range for atk_scale arts + 停顿
+      skills: altSkills(chess, d, bb, {
+        skchr_ayer_1: (s) => {
+          const slug = num(s.bb.sluggish, 0);
+          return {
+            kind: instantKindOf(s),
+            targeting: { maxTargets: Math.max(1, Math.floor(num(s.bb.max_target, 1))) },
+            attack: {
+              dmgType: 'arts', atkScale: num(s.bb.atk_scale, 1),
+              onEachHit({ battle, unit, target }) {
+                if (slug > 0 && target && target.alive && target.side === 'enemy') battle.applyStatus(target, 'sluggish', { duration: slug, source: unit });
+              },
+            },
+          };
+        },
+      }),
+      talents: [{ install(battle, unit) {
+        aura(battle, unit, { key: 'talent:ayer_aspd', side: 'ally', tiles: () => gridKeys(tGrid, unit), filter: (a) => a.kind === 'op', mods: { aspd: num(t0.attack_speed) } });
+      } }],
+    };
+    if (skillGrid) kit.skill.targeting = { rangeGrid: skillGrid };
+    // 精锐 module LOR-X: "攻击附带10%攻击力的法术伤害"
+    if (moduleArts > 0) {
+      kit.trait = { afterHit: (battle, unit, target) => {
+        if (target && target.alive) battle.dealDamage(unit, target, { amount: unit.s.atk * moduleArts, type: 'arts', tags: ['module'] });
+      } };
+    }
+    return kit;
+  },
+};
@@ -0,0 +1,36 @@
+// server/sim/content/kits/ops/chess_char_3_03-swire.js — 诗怀雅 (char_308_swire) kit, tier 3.
+// Conventions of the tier-3 kits: ../shared/tier3.js; kit contract and rules: ../README.md.
+
+import { num, defOf, talentBb, altSkills, gridKeys, copyGrid, NINE, aura } from '../shared/tier3.js';
+
+export default {
+  // ---- 3_03 诗怀雅 · 教官 — S2 协同作战: ATK +, first talent ×talent_scale; 近距离作战指导 melee ATK aura
+  //      S1 指挥调度: the talent covers the skill's range (x-1 normal / x-2 elite) at ×talent_scale while it runs
+  chess_char_3_03_a: (bb, chess, def) => {
+    const d = defOf(chess, def);
+    const t0 = talentBb(d, 0);
+    const tGrid = copyGrid(d.talents?.[0]?.rangeGrid) ?? NINE;
+    const scale = num(bb.talent_scale, 1);
+    // "第一天赋生效范围扩大" (talent_range_flag): the selected skill's range replaces the talent's while it is active
+    const skillTGrid = num(bb.talent_range_flag) > 0 ? copyGrid(d.skill?.rangeGrid) : null;
+    const refresh = ({ unit }) => unit.mem.swireAura?.();
+    return {
+      skill: {
+        kind: 'duration',
+        mods: { atkPct: num(bb.atk) },
+        onStart: refresh,
+        onEnd: refresh,
+      },
+      skills: altSkills(chess, d, bb, {
+        skchr_swire_1: () => ({ kind: 'duration', onStart: refresh, onEnd: refresh }),
+      }),
+      talents: [{ install(battle, unit) {
+        unit.mem.swireAura = aura(battle, unit, {
+          key: 'talent:swire_guide', side: 'ally', tiles: () => gridKeys(skillTGrid && unit.skill?.active ? skillTGrid : tGrid, unit),
+          filter: (a) => String(a.def?.position ?? 'MELEE').toUpperCase() === 'MELEE',
+          mods: () => ({ atkPct: num(t0.atk) * (unit.skill?.active ? scale : 1) }),
+        });
+      } }],
+    };
+  },
+};
@@ -0,0 +1,230 @@
+// server/sim/content/kits/ops/chess_char_3_04-swire2.js — 琳琅诗怀雅 (char_1033_swire2) kit, tier 3.
+// Conventions of the tier-3 kits: ../shared/tier3.js; kit contract and rules: ../README.md.
+
+import { COLS } from '../../../constants.js';
+import { bodyOnTile } from '../../../body.js';
+import {
+  num, defOf, talentBb, moduleTalentBb, selectedId, altSkills, alive, gridKeys, fx, copyGrid, textNum, freeTile,
+  groundTile, enemiesOn,
+} from '../shared/tier3.js';
+
+/** 琳琅诗怀雅 S3's coin range (PRTS 备注 "前方范围2-4"; range_table "2-4", facing right). */
+const SWIRE2_COIN_GRID = Object.freeze([[1, 1], [0, 0], [0, 1], [0, 2], [-1, 1]]);
+
+/** Merchant trait with a callback on every successful DP payment (琳琅诗怀雅 大买家). Same rules as professions.js. */
+function merchantInstall(onPay) {
+  return (battle, unit) => {
+    const iv = unit.profile.merchantInterval ?? 3;
+    const cost = unit.profile.merchantCost ?? 3;
+    battle.every(iv, () => {
+      if (!alive(unit)) return;
+      const pl = battle.getPlayer(unit.ownerId);
+      if (!pl) return;
+      if (pl.dp >= cost) {
+        battle.addDp(unit.ownerId, -cost);
+        onPay(battle, unit, cost);
+        battle.emit('merchantPay', { unit, cost });
+      } else battle.retreat(unit, { reason: 'merchant' });
+    }, { owner: unit });
+  };
+}
+
+export default {
+  // ---- 3_04 琳琅诗怀雅 · 行商 — S2 “见面礼” (passive): each attack spends a coin to drop a champagne bomb in range;
+  //      大买家: coin at skill start + coin & ATK stack per trait payment; 破财消灾: DP-paid revive (cost doubles)
+  //      S1 仗义疏财 (passive, 2 coins): a coin heals the most injured ally (< 70 % HP) of the 8 surrounding tiles for
+  //      attack@heal_scale × ATK — on her attack, or with no enemy to attack on her own attack timer (owner's decision
+  //      2026-10-04, against the official 「下一次攻击会为…」; installS1). S3 千金一掷 (持续时间无限): attacks hit twice, kills give a coin;
+  //      closing it spends every coin on random ground enemies of range 2-4 in front and those she blocks (atk_scale phys +
+  //      a small push, radial despite the text's 向前 — PRTS 备注 "推开效果为径向推动"; client charpack char_1033_swire2:
+  //      the RandomGold ability (Skill_3_End) carries swire2_s_3[knockback] of template knockback[relative]; 地面敌方单位,
+  //      弹道不可对空). It does not close itself when the purse is full (PRTS 卫戍协议/帮助 「通常不会自动关闭技能」; the skill
+  //      text is 「可随时主动关闭」). Owner 2026-10-04: at the cap (金币上限为10) she shoots once an enemy is in the skill's
+  //      attack range (the 1-tile range, not the coin-mark 2-4 grid). Below the cap, or with nobody there, it stays open.
+  //      精锐 module MER-Y: ATK +4 % per trait payment (≤ 5 stacks).
+  chess_char_3_04_a: (bb, chess, def) => {
+    const d = defOf(chess, def);
+    const t0 = talentBb(d, 0), t1 = talentBb(d, 1);
+    const sel = selectedId(chess, d);
+    const S1 = 'skchr_swire2_1', S2 = 'skchr_swire2_2', S3 = 'skchr_swire2_3';
+    // "携带此技能时金币上限为N": the SELECTED skill's cap
+    const coinMax = num(bb.sp, 3);
+    const coinCost = Math.abs(num(bb['attack@sp'], -1)) || 1;
+    const modTal = moduleTalentBb(chess);
+    const scale = num(bb.atk_scale, 1);
+    const slug = num(bb.sluggish, 2);
+    const tokenId = chess?.skill?.overrideTokenKey ?? (d.tokens || []).find((t) => /gdtrap/.test(String(t))) ?? 'token_10031_swire2_gdtrap';
+    const skillGrid = copyGrid(d.skill?.rangeGrid);
+    const addCoins = (battle, unit, n) => {
+      const before = unit.mem.coins ?? 0;
+      unit.mem.coins = Math.min(coinMax, before + n);
+      if (unit.mem.coins > before) fx(battle, 'coin', unit, { n: unit.mem.coins });
+    };
+    const bombKit = (owner, switchT) => ({
+      skill: null,
+      trait: { noAttack: true },
+      install(battle, bomb) {
+        battle.on('tick', () => {
+          if (!bomb.alive || !bomb.deployed) return;
+          for (const e of battle.enemies) {
+            if (!e.alive || e.hidden || e.isFlying || e.s.flags.untargetable) continue;
+            if (!bodyOnTile(e, bomb.tileR, bomb.tileC)) continue;
+            // first enemy touching it; after switchT s on the field the bomb deals its damage one extra time
+            const hits = battle.time - bomb.deployedAt >= switchT - 1e-9 ? 2 : 1;
+            for (let i = 0; i < hits && e.alive; i++) {
+              battle.dealDamage(owner, e, { amount: owner.s.atk * scale, type: 'phys', isSkill: true, canDodge: false, tags: ['skill', 'trap'] });
+            }
+            if (e.alive) battle.applyStatus(e, 'sluggish', { duration: slug, source: owner });
+            // `consumed`: the bomb is used up by its own blast — clients play its impact sound, not a death sound
+            fx(battle, 'explode', bomb, { src: owner.id, target: e.id, hits, consumed: true });
+            battle.retreat(bomb, { reason: 'expired', permanent: true });
+            break;
+          }
+        }, { owner: bomb });
+      },
+    });
+    const healRatio = textNum(d.skill?.description, /血量不足(\d+)%/, 70) / 100;
+    /**
+     * 仗义疏财 — official text 「消耗一枚金币，下一次攻击会为周围八格内血量不足70%的一名友方单位恢复相当于攻击力40%的生命」: the heal rides on an
+     * attack, so with no enemy around she never healed (community report #5 「琳琅诗怀雅1技能不会主动奶身边受伤的干员」). Owner's
+     * decision 2026-10-04 (a deliberate deviation, like §21.29's 重装 casts): she heals an injured ally beside her whether
+     * she attacks or not. Same target (the lowest HP ratio below 70 % of the 8 surrounding tiles, no 禁疗 / 孤立 unit, no
+     * device), coin and heal_scale × ATK. Cadence [ASSUMED]: at most one heal per attack cycle (her attack interval, ASPD
+     * included) — while she attacks, on the attack as before; when her last attack attempt found no target, on her own
+     * timer (the 'tick' hook runs after the attacks, so an attack due in the same tick takes it).
+     */
+    const installS1 = (battle, unit) => {
+      const hs = num(bb['attack@heal_scale'], num(bb.heal_scale, 0));
+      let nextAt = -Infinity;
+      const healTarget = () => {
+        let best = null;
+        for (const a of battle.allyUnits) {
+          if (a === unit || !alive(a) || a.hidden || a.kind === 'device' || a.hpRatio >= healRatio) continue;
+          if (a.s.flags.noHeal || a.profile?.noHeal) continue; // 禁疗 / 孤立: never a heal target
+          if (Math.max(Math.abs(a.tileR - unit.tileR), Math.abs(a.tileC - unit.tileC)) !== 1) continue; // 周围八格
+          if (!best || a.hpRatio < best.hpRatio || (a.hpRatio === best.hpRatio && a.deploySeq < best.deploySeq)) best = a;
+        }
+        return best;
+      };
+      const tryHeal = () => {
+        if (!alive(unit) || (unit.mem.coins ?? 0) < coinCost || !(hs > 0) || battle.time < nextAt - 1e-9) return;
+        const best = healTarget();
+        if (!best) return;
+        unit.mem.coins -= coinCost;
+        nextAt = battle.time + unit.s.interval;
+        battle.heal(unit, best, unit.s.atk * hs);
+        fx(battle, 'coin', unit, { n: unit.mem.coins, heal: best.id, skill: 'swire2_1' });
+      };
+      battle.on('attack', (ctx) => { if (ctx.attacker === unit) tryHeal(); }, { owner: unit, priority: -10 });
+      battle.on('tick', () => { if (unit.deployed && unit.canAct && !unit.trait?.hadTarget) tryHeal(); }, { owner: unit });
+    };
+    const installS3 = (battle, unit) => { // 千金一掷: "击倒敌人时获得一枚金币"
+      battle.on('kill', (ctx) => {
+        if (ctx.killer === unit && ctx.victim.side === 'enemy' && unit.skill?.active) addCoins(battle, unit, 1);
+      }, { owner: unit });
+    };
+    return {
+      skill: { kind: 'passive' },
+      skills: altSkills(chess, d, bb, {
+        [S1]: () => ({ kind: 'passive' }), // (coins → heals: installS1)
+        [S3]: (s) => {
+          const cash = num(s.bb.atk_scale, 1), force = num(s.bb.force, 0);
+          // the 【金币标记】 targets: ground enemies on range 2-4 in front of her (range_table "2-4") and every unit she blocks
+          const coinMarks = (battle, unit) => {
+            const list = enemiesOn(battle, unit, gridKeys(SWIRE2_COIN_GRID, unit), 0, { ...unit.profile, canHitFly: false });
+            for (const e of unit.blocking || []) if (e.alive && !e.isFlying && !list.includes(e)) list.push(e);
+            return list;
+          };
+          const purseCap = Math.max(1, Math.floor(num(s.bb.sp, 10)));
+          return {
+            kind: 'toggle',
+            attack: { hits: 2 },
+            // Owner 2026-10-04: at the cap, shoot once a ground enemy is in the skill attack range (data rangeGrid,
+            // the same 1-tile range as her attack). The coin marks (前方 2-4) are who the burst pays, not the trigger.
+            // Nobody in that range: stay open and keep the coins. Below the cap: stay open.
+            onTick({ battle, unit, skill }) {
+              if (!skill.active || (unit.mem.coins ?? 0) + 1e-9 < purseCap) return;
+              const keys = gridKeys(skillGrid ?? unit.rangeGrid, unit);
+              if (enemiesOn(battle, unit, keys, 0, { ...unit.profile, canHitFly: false }).length) skill.end('manual');
+            },
+            onEnd({ battle, unit, reason }) {
+              if (reason !== 'manual' || !unit.alive) return;
+              const n = unit.mem.coins ?? 0;
+              unit.mem.coins = 0;
+              let spent = 0;
+              // PRTS 备注: closing it "立即对前方范围2-4内的地面敌方单位与自身阻挡的所有单位施加【金币标记】", the coins going to
+              // marked units at random — 弹道（不可对空）: air units (FLY, 近地悬浮, 浮空) are never paid. Until 0.1.1 the
+              // coins went to her attack range (1-1) instead of range 2-4.
+              const marked = coinMarks(battle, unit);
+              for (let i = 0; i < n; i++) {
+                const e = battle.rng.pick(marked.filter((x) => x.alive && !x.isFlying));
+                if (!e) break;
+                spent++;
+                battle.dealDamage(unit, e, { amount: unit.s.atk * cash, type: 'phys', isSkill: true, tags: ['skill', 'swire2Cash'] });
+                // "将目标小力地向前推开" — PRTS 备注 "金币弹道…推开效果为径向推动", client knockback[relative]: a radial push
+                // away from her centre (not along her direction, so no 45° / 0.25-tile 特殊修正), official 力度 − 重量
+                // distance (Battle.push)
+                if (e.alive) battle.push(e, force, { from: unit });
+              }
+              fx(battle, 'coin', unit, { n: 0, spent, skill: 'swire2_3' });
+            },
+          };
+        },
+      }),
+      trait: { install: merchantInstall((battle, unit) => {
+        // MER-Y "每次特性消耗费用时攻击力+4%，最多可以叠加5次" (any time, not only during the skill)
+        if (modTal && num(modTal.atk) > 0) {
+          battle.addBuff(unit, { key: 'trait:swire2_module', refresh: 'stack', stacks: 1, maxStacks: Math.max(1, num(modTal.max_stack_cnt, 5)), mods: { atkPct: num(modTal.atk) } });
+        }
+        if (!unit.skill?.active) return; // "技能期间"
+        addCoins(battle, unit, num(t0.trait_sp, 1));
+        battle.addBuff(unit, { key: 'talent:swire2_buyer', refresh: 'stack', stacks: 1, maxStacks: Math.max(1, num(t0.max_stack_cnt, 8)), mods: { atkPct: num(t0.atk) } });
+      }) },
+      install(battle, unit) {
+        if (sel === S1) { installS1(battle, unit); return; }
+        if (sel === S3) { installS3(battle, unit); return; }
+        if (sel !== S2 && sel != null) return;
+        const switchT = num(battle.tokenDef(tokenId, unit)?.skill?.bb?.duration_switch, 3);
+        battle.on('attack', (ctx) => {
+          if (ctx.attacker !== unit || !alive(unit) || (unit.mem.coins ?? 0) < coinCost) return;
+          const tiles = [];
+          for (const k of gridKeys(skillGrid ?? unit.rangeGrid, unit)) {
+            const r = (k / COLS) | 0, c = k % COLS;
+            // (never on the home tile of a dead operator: it could not redeploy until an enemy triggers the bomb)
+            if (freeTile(battle, r, c) && groundTile(battle, r, c)) tiles.push([r, c]);
+          }
+          const tile = battle.rng.pick(tiles);
+          if (!tile) return;
+          const bomb = battle.spawnToken(unit, tokenId, tile[0], tile[1], { untargetable: true, kit: bombKit(unit, switchT) });
+          if (!bomb) return;
+          unit.mem.coins -= coinCost;
+          fx(battle, 'summon', bomb, { src: unit.id, token: tokenId, coins: unit.mem.coins });
+        }, { owner: unit, priority: -10 });
+      },
+      talents: [
+        { install(battle, unit) { // 大买家: "开启技能时获得1枚金币" (a passive starts at every deployment, S3 when cast)
+          battle.on('deploy', (ctx) => {
+            if (ctx.unit !== unit) return;
+            unit.mem.coins = 0;
+            if (unit.skill?.kind === 'passive') addCoins(battle, unit, num(t0.sp, 1));
+          }, { owner: unit });
+          battle.on('skillStart', (ctx) => { if (ctx.unit === unit && unit.skill?.kind !== 'passive') addCoins(battle, unit, num(t0.sp, 1)); }, { owner: unit });
+        } },
+        { install(battle, unit) { // 破财消灾
+          battle.on('fatal', (ctx) => {
+            if (ctx.unit !== unit || ctx.prevented) return;
+            const n = unit.mem.saveCount ?? 0;
+            const cost = Math.abs(num(t1.cost, -5)) * Math.pow(num(t1.cost_multi, 2), n);
+            const pl = battle.getPlayer(unit.ownerId);
+            if (!pl || pl.dp + 1e-9 < cost) return;
+            battle.addDp(unit.ownerId, -cost);
+            unit.mem.saveCount = n + 1;
+            ctx.prevented = true;
+            unit.hp = Math.max(1, unit.s.maxHp * num(t1.hp_ratio, 0.7));
+            fx(battle, 'revive', unit, { cost });
+          }, { owner: unit });
+        } },
+      ],
+    };
+  },
+};
@@ -0,0 +1,62 @@
+// server/sim/content/kits/ops/chess_char_3_05-skadi.js — 斯卡蒂 (char_263_skadi) kit, tier 3.
+// Conventions of the tier-3 kits: ../shared/tier3.js; kit contract and rules: ../README.md.
+
+import { num, defOf, talentBb, traitBb, altSkills, statSkill, fx } from '../shared/tier3.js';
+
+/** Abyssal Hunters (character_table groupId `abyssal`, not in data/chess.json): 深海掠食者 targets. */
+const ABYSSAL = new Set(['char_263_skadi', 'char_143_ghost', 'char_218_cuttle', 'char_474_glady', 'char_1023_ghost2', 'char_4145_ulpia']);
+
+export default {
+  // ---- 3_05 斯卡蒂 · 无畏者 — S3 涌潮悲歌: ATK/DEF/HP +; 深海掠食者 (Abyssal Hunters ATK); 迅捷出击 (redeploy −10 s)
+  //      精锐 module DRE-Y: once per deployment, a lethal hit instead restores full HP with max HP −60 % and ASPD +30
+  //      S1 迅捷打击·γ型: ATK/ASPD +; S2 跃浪击 (passive): ATK + for `duration` s after every deployment;
+  //      精锐 module DRE-X: ×atk_scale on blocked enemies
+  chess_char_3_05_a: (bb, chess, def) => {
+    const d = defOf(chess, def);
+    const t0 = talentBb(d, 0), t1 = talentBb(d, 1);
+    const tb = traitBb(d);
+    const kit = {
+      skill: { kind: 'duration', mods: { atkPct: num(bb.atk), defPct: num(bb.def), hpPct: num(bb.max_hp) } },
+      skills: altSkills(chess, d, bb, {
+        'skcom_quickattack[3]': statSkill,
+        skchr_skadi_2: (s) => ({
+          kind: 'passive',
+          onStart({ battle, unit }) { // "部署后N秒内攻击力+X" (a passive starts at every deployment)
+            battle.addBuff(unit, { key: 'skill:skadi_wave', duration: num(s.bb.duration, 20), mods: { atkPct: num(s.bb.atk) }, visible: true });
+          },
+        }),
+      }),
+      talents: [
+        { install(battle, unit) { // "编入队伍时": every Abyssal Hunter of this player, for the whole battle
+          for (const a of battle.allyUnits) {
+            if (a.kind === 'op' && a.ownerId === unit.ownerId && ABYSSAL.has(a.def?.charId)) {
+              battle.addBuff(a, { key: 'talent:skadi_predator', mods: { atkPct: num(t0.atk) }, persist: true, allowDead: true, source: unit });
+            }
+          }
+        } },
+        { install(battle, unit) {
+          if (unit.mem.skadiSwift) return; // base stats are per unit; never apply twice
+          unit.mem.skadiSwift = true;
+          unit.base.respawnTime = Math.max(0, unit.base.respawnTime + num(t1.respawn_time));
+        } },
+      ],
+    };
+    if (tb.value != null || tb.hp_ratio != null) {
+      kit.install = (battle, unit) => {
+        battle.on('deploy', (ctx) => { if (ctx.unit === unit) unit.mem.tideUsed = false; }, { owner: unit });
+        battle.on('fatal', (ctx) => {
+          if (ctx.unit !== unit || ctx.prevented || unit.mem.tideUsed) return;
+          unit.mem.tideUsed = true;
+          ctx.prevented = true;
+          const hpMul = tb.value != null ? 1 - num(tb.value) : num(tb.max_hp, 0.4);
+          battle.addBuff(unit, { key: 'trait:skadi_tide', mods: { hpMul: Math.max(0.05, hpMul), aspd: num(tb.attack_speed) }, visible: true });
+          unit.hp = Math.max(1, unit.s.maxHp * num(tb.hp_ratio, 1));
+          fx(battle, 'revive', unit, { module: true });
+        }, { owner: unit, priority: -50 });
+      };
+    }
+    // DRE-X "攻击被阻挡的敌人时攻击力提升至115%" (blocked by anyone)
+    if (num(tb.atk_scale) > 0) kit.trait = { dmgMul: (battle, unit, target) => (target && target.blockedBy ? num(tb.atk_scale, 1) : 1) };
+    return kit;
+  },
+};
@@ -0,0 +1,102 @@
+// server/sim/content/kits/ops/chess_char_3_06-philae.js — 菲莱 (char_4148_philae) kit, tier 3.
+// Conventions of the tier-3 kits: ../shared/tier3.js; kit contract and rules: ../README.md.
+
+import { num, defOf, talentBb, traitBb, selectedId, altSkills, fx, NINE, giveSp } from '../shared/tier3.js';
+
+export default {
+  // ---- 3_06 菲莱 · 本源铁卫 — S2 冥河诅咒: stops attacking, HP +; when attacked blasts the ground enemies of the 3×3
+  //      around her (PRTS 备注: range x-4; arts + ep_damage_ratio × ATK apoptosis, aoe_cd); ATK + once hit by element
+  //      damage; 神河谕使: 元素损伤 taken −damage_resistance, +SP on apoptosis
+  //      精锐 module PRP-X "阻挡敌人时，自身造成的元素损伤提升15%": EVERY element fill she deals (the S2 blast, a 灼燃维式重锤
+  //      she carries …) ×ep_damage_scale while she blocks — an `elementHit` multiplier, like 余's
+  //      S1 灵河护佑 (TAKE_DAMAGE): HP +, clears her element gauges and gives a shield_value 损伤屏障 (absorbs element
+  //      damage — gauge fills — until spent or the skill ends)
+  // 神河谕使 and the barrier act on the element hit before it lands (PRTS 备注: "减伤与技力回复效果于伤害计算前处理；即使
+  // 受到0点的凋亡损伤依然可以回复技力", "损伤屏障于伤害计算前、第一天赋后处理"): the talent's cut and SP first (priority 20),
+  // then the barrier absorbs what is left (`dmg.amount × dmg.mul`). The cut is a 元素损伤 multiplier (PRTS 元素 "受到的
+  // 元素损伤 = 损伤值 × (1 − 损伤抵抗 × 0.01)，后续可应用元素损伤倍率提升/降低等效果"), not `elemTakenMul` (元素伤害 / 元素脆弱).
+  chess_char_3_06_a: (bb, chess, def) => {
+    const d = defOf(chess, def);
+    const t0 = talentBb(d, 0);
+    const tb = traitBb(d);
+    const sel = selectedId(chess, d);
+    const S1 = 'skchr_philae_1', S2 = 'skchr_philae_2';
+    const isS2 = sel === S2 || sel == null;
+    const scale = num(bb.atk_scale, 1);
+    const ep = num(bb.ep_damage_ratio, 0);
+    const cd = num(bb.aoe_cd, 2);
+    const epScale = num(tb.ep_damage_scale, 1);
+    const cut = Math.max(0, Math.min(1, num(t0.damage_resistance)));
+    // 损伤屏障 of S1: absorbs the gauge gain an element hit would add (after 神河谕使)
+    const installBarrier = (battle, unit) => {
+      battle.on('elementHit', (ctx) => {
+        if (ctx.target !== unit || !(unit.mem.philaeBarrier > 0) || !unit.skill?.active) return;
+        const dmg = ctx.dmg;
+        const eff = num(dmg.amount) * num(dmg.mul, 1);
+        if (!(eff > 0)) return;
+        const take = Math.min(unit.mem.philaeBarrier, eff);
+        unit.mem.philaeBarrier -= take;
+        if (take >= eff - 1e-9) dmg.cancel = true;
+        else dmg.amount *= (eff - take) / eff;
+        if (!(unit.mem.philaeBarrier > 0)) fx(battle, 'shieldBreak', unit, { element: true });
+      }, { owner: unit });
+    };
+    return {
+      skill: {
+        kind: 'duration',
+        mods: { hpPct: num(bb.max_hp) },
+        attack: { noAttack: true },
+        onStart({ unit }) { unit.mem.philaeCd = -Infinity; },
+        onEnd({ battle, unit }) { battle.removeBuff(unit, 'skill:philae_rage'); },
+      },
+      skills: altSkills(chess, d, bb, {
+        [S1]: (s) => ({
+          kind: 'duration',
+          mods: { hpPct: num(s.bb.max_hp) },
+          onStart({ battle, unit }) {
+            battle.reduceElement(unit, 1e12); // "立刻清除自身的元素损伤" (a gauge locked by a running burst stays)
+            unit.mem.philaeBarrier = num(s.bb.shield_value, 0);
+            fx(battle, 'shield', unit, { element: true, n: unit.mem.philaeBarrier });
+          },
+          onEnd({ unit }) { unit.mem.philaeBarrier = 0; },
+        }),
+      }),
+      talents: [{ install(battle, unit) {
+        // 神河谕使 (every skill): 元素损伤 taken ×(1 − damage_resistance); "受到凋亡损伤时回复2点技力" — even for 0 damage
+        battle.on('elementHit', (ctx) => {
+          const dmg = ctx.dmg;
+          if (ctx.target !== unit || !dmg || dmg.type !== 'element') return;
+          if (dmg.element === 'apoptosis' && !unit.skill?.active) giveSp(unit, num(t0.sp), 'talent');
+          if (cut > 0) dmg.mul *= 1 - cut;
+        }, { owner: unit, priority: 20 });
+      } }],
+      install(battle, unit) {
+        if (sel === S1) installBarrier(battle, unit);
+        // module PRP-X: her element damage ×ep_damage_scale while she blocks
+        if (epScale > 1) {
+          battle.on('elementHit', (ctx) => {
+            if (ctx.source === unit && ctx.dmg?.type === 'element' && ctx.target?.side === 'enemy' && unit.blocking.length) ctx.dmg.mul *= epScale;
+          }, { owner: unit });
+        }
+        battle.on('damaged', (ctx) => {
+          if (ctx.target !== unit || !unit.alive) return;
+          const sk = unit.skill;
+          if (ctx.type === 'element') {
+            if (isS2 && sk && sk.active && !unit.findBuff('skill:philae_rage')) battle.addBuff(unit, { key: 'skill:philae_rage', mods: { atkPct: num(bb.atk) }, visible: true });
+            return;
+          }
+          if (!isS2 || !sk || !sk.active || !ctx.dmg?.isAttack || !ctx.source || ctx.source.side !== 'enemy') return;
+          if (battle.time < (unit.mem.philaeCd ?? -Infinity)) return;
+          unit.mem.philaeCd = battle.time + cd;
+          // "周围的地面敌人" = range x-4, the 3×3 tiles around her (PRTS 备注)
+          for (const e of battle.unitsInGrid(unit, NINE, { side: 'enemy' })) {
+            if (e.isFlying) continue;
+            battle.dealDamage(unit, e, { amount: unit.s.atk * scale, type: 'arts', canDodge: false, isSkill: true, tags: ['skill', 'counter'] });
+            if (ep > 0 && e.alive) battle.dealDamage(unit, e, { type: 'element', element: 'apoptosis', amount: unit.s.atk * ep, tags: ['skill'] });
+          }
+          fx(battle, 'aoe', unit, { radius: 1.5, tiles: 'box', dmgType: 'arts', skill: 'philae_2' }); // box: the 3×3 tiles
+        }, { owner: unit });
+      },
+    };
+  },
+};
@@ -0,0 +1,72 @@
+// server/sim/content/kits/ops/chess_char_3_07-forcer.js — 见行者 (char_4036_forcer) kit, tier 3 (hidden).
+// Conventions of the tier-3 kits: ../shared/tier3.js; kit contract and rules: ../README.md.
+
+import { PUSH_DIRECTIONAL_MIN_DIST } from '../../../constants.js';
+import { num, defOf, talentBb, traitBb, onTiles, gridKeys, fx, copyGrid } from '../shared/tier3.js';
+
+/** Two enemy bodies touch within this distance (tiles) — 见行者 collision stun. */
+const COLLIDE = 0.6;
+
+export default {
+  // ---- 3_07 见行者 · 推击手 (hidden) — S2 惊爆射击: push every enemy in the skill range forward + stun (longer when
+  //      slammed into a wall, collided enemies stunned too; air units too [ASSUMED: "范围内所有敌人", no 对空 note on
+  //      PRTS] — a 失衡免疫 enemy or a 静态刚体 (the drones) is not pushed but still stunned); 技巧射击: ignore DEF vs heavy enemies;
+  //      精锐 module PUS-X: redeployed on a ranged tile ⇒ half the deployment cost back
+  chess_char_3_07_a: (bb, chess, def) => {
+    const d = defOf(chess, def);
+    const t0 = talentBb(d, 0);
+    const tb = traitBb(d);
+    const skillGrid = copyGrid(d.skill?.rangeGrid);
+    const force = num(bb.force, 1);
+    const sDirect = num(bb['forcer_s_2[hit_directly].stun'], num(bb.stun, 1));
+    const sWall = num(bb.stun, sDirect);
+    const sBrush = num(bb['forcer_s_2[brush].stun'], sDirect);
+    const kit = {
+      skill: {
+        kind: 'instant',
+        onStart({ battle, unit }) {
+          const keys = new Set(gridKeys(skillGrid ?? unit.rangeGrid, unit));
+          const victims = battle.enemies.filter((e) => e.alive && !e.hidden && !e.s.flags.untargetable && onTiles(e, keys));
+          const pushed = new Set(victims);
+          for (const e of victims) {
+            // "往身前方向…推开": a directional push whose angle is fixed — PRTS 备注 "不会因为角度过大而改变推动的方向或削减力度"
+            // (only the angle: a target nearer than 0.25 tile still turns radial at 受力等级 −2) — by the official
+            // 力度 − 重量 distance of a 特效 push (PRTS 推与拉 names 见行者's skills 特效类; Battle.push / pushDistance);
+            // stopped short of it ⇒ it hit a wall
+            const near = Math.hypot(e.x - unit.x, e.y - unit.y) < PUSH_DIRECTIONAL_MIN_DIST;
+            const expect = battle.pushDistance(e, near ? force - 2 : force, { effect: true });
+            const moved = battle.push(e, force, { from: unit, dir: { x: unit.fwd[1], y: unit.fwd[0] }, fixedAngle: true, effect: true });
+            const wall = expect > 0 && moved + 0.05 < expect;
+            battle.applyStatus(e, 'stun', { duration: wall ? sWall : sDirect, source: unit });
+          }
+          for (const e of victims) {
+            for (const o of battle.enemiesInRadius(e.x, e.y, COLLIDE)) {
+              if (pushed.has(o)) continue;
+              pushed.add(o);
+              battle.applyStatus(o, 'stun', { duration: sBrush, source: unit });
+            }
+          }
+          fx(battle, 'push', unit, { skill: 'forcer_2', n: victims.length });
+        },
+        // "立即将范围内所有敌人…": the data rule SKILL_RANGE fires it once an enemy is inside the skill range (PRTS 技能
+        // 策略 "仅在技能范围内存在敌人（无视其不可选中）时释放技能"), not only when one stands on her 2-tile attack range
+      },
+      talents: [{ install(battle, unit) {
+        battle.on('hit', (ctx) => {
+          if (ctx.source === unit && ctx.target.side === 'enemy' && ctx.target.s.massLevel >= num(t0.value, 3)) ctx.dmg.defIgnoreFlat += num(t0.def_penetrate_fixed);
+        }, { owner: unit });
+      } }],
+    };
+    if (num(tb.value) > 0) {
+      kit.install = (battle, unit) => {
+        battle.on('deploy', (ctx) => {
+          // ranged position = not a ground tile (a high tile, or a platform that elevates it: unit.ground false)
+          if (ctx.unit !== unit || ctx.initial || unit.ground) return;
+          battle.addDp(unit.ownerId, unit.base.cost * num(tb.value));
+          fx(battle, 'dp', unit, { n: unit.base.cost * num(tb.value) });
+        }, { owner: unit });
+      };
+    }
+    return kit;
+  },
+};
@@ -0,0 +1,79 @@
+// server/sim/content/kits/ops/chess_char_3_08-mint.js — 薄绿 (char_388_mint) kit, tier 3.
+// Conventions of the tier-3 kits: ../shared/tier3.js; kit contract and rules: ../README.md.
+
+import { num, defOf, talentBb, traitBb, altSkills, gridKeys, fx, copyGrid, enemiesOn, aura } from '../shared/tier3.js';
+
+export default {
+  // ---- 3_08 薄绿 · 阵法术师 — S2 聚能涡旋: each attack strikes every enemy on her range (the trait's 群体法术伤害) and
+  //      pushes each one towards her, end-of-skill burst on
+  //      every enemy in range; 地质学者: DEF aura (skill off) / less likely targeted (skill on);
+  //      精锐 module PLX-X: keeps part of the guard (DEF/RES) while the skill runs
+  //      S1 风语: wider range (skill grid), attacks every enemy on it at attack@atk_scale. Auto-cast: the data
+  //      rule SEARCH is the 阵法术师 row (PRTS 卫戍协议/帮助 "不受基础策略影响，在初始攻击范围内存在敌人时释放技能"; it
+  //      covers every MANUAL skill of the class — user playtest #6) = an enemy inside her INITIAL range — the engine's
+  //      DEFAULT rule, checked every tick for a unit that does not attack while its skill is off — not any enemy on the
+  //      field: she would burn the skill on enemies that just spawned.
+  chess_char_3_08_a: (bb, chess, def) => {
+    const d = defOf(chess, def);
+    const t0 = talentBb(d, 0);
+    const tb = traitBb(d);
+    const tGrid = copyGrid(d.talents?.[0]?.rangeGrid) ?? [[1, 0], [0, -1], [0, 0], [0, 1], [-1, 0]];
+    const pullForce = num(bb['attack@force'], num(bb.force, 0));
+    const endScale = num(bb.atk_scale, 0);
+    const keepDef = num(tb['soil_e_002[buff].def'], 0), keepRes = num(tb['soil_e_002[buff].magic_resistance'], 0);
+    // every skill: PLX-X keeps part of the guard, 地质学者 taunt −1 while it runs, DEF aura only while it does not
+    const guardOn = ({ battle, unit }) => {
+      if (keepDef || keepRes) battle.addBuff(unit, { key: 'trait:mint_keep', mods: { defPct: keepDef, resFlat: keepRes } });
+      battle.addBuff(unit, { key: 'talent:mint_taunt', mods: { taunt: num(t0.taunt_level, -1) } });
+      unit.mem.mintAura?.();
+    };
+    const guardOff = ({ battle, unit }) => {
+      battle.removeBuff(unit, 'trait:mint_keep');
+      battle.removeBuff(unit, 'talent:mint_taunt');
+      unit.mem.mintAura?.();
+    };
+    return {
+      skills: altSkills(chess, d, bb, {
+        skchr_mint_1: (s) => {
+          const grid = copyGrid(s.rangeGrid);
+          return {
+            kind: 'duration',
+            trigger: { rule: 'DEFAULT' },
+            attack: { atkScale: num(s.bb['attack@atk_scale'], num(s.bb.atk_scale, 1)) },
+            ...(grid ? { targeting: { rangeGrid: grid } } : {}),
+            onStart: guardOn,
+            onEnd: guardOff,
+          };
+        },
+      }),
+      skill: {
+        kind: 'duration',
+        attack: {
+          atkScale: num(bb['attack@atk_scale'], 1),
+          onHit({ battle, unit, target }) {
+            if (!target || !target.alive || target.side !== 'enemy') return;
+            // PRTS 备注: "此技能的“拖拽”机制实际为反方向（指向薄绿方向）的推开" — a radial push towards her by the
+            // official 力度 − 重量 push distance (小力 vs weight 1: 0.44 tiles), never past her (Battle.push inward). Her
+            // attack reaches air units (阵法术师 "攻击时可对空"), but the drones of the mode are 静态刚体 (PRTS 特殊机制): hit,
+            // never dragged (player report after 0.1.0, "飞机可以被薄绿的技能拉走")
+            if (battle.push(target, pullForce, { from: unit, inward: true }) > 0) fx(battle, 'pull', target, { src: unit.id });
+          },
+        },
+        onStart: guardOn,
+        onEnd(ctx) {
+          const { battle, unit, reason } = ctx;
+          if (reason !== 'death' && unit.alive && endScale > 0) {
+            for (const e of enemiesOn(battle, unit, unit.rangeKeys)) battle.dealDamage(unit, e, { amount: unit.s.atk * endScale, type: 'arts', isSkill: true, tags: ['skill', 'burst'] });
+            fx(battle, 'aoe', unit, { radius: 2, dmgType: 'arts', skill: 'mint_2' });
+          }
+          guardOff(ctx);
+        },
+      },
+      talents: [{ install(battle, unit) {
+        unit.mem.mintAura = aura(battle, unit, {
+          key: 'talent:mint_geo', side: 'ally', tiles: () => gridKeys(tGrid, unit), active: () => !unit.skill?.active, mods: { defPct: num(t0.def) },
+        });
+      } }],
+    };
+  },
+};
@@ -0,0 +1,57 @@
+// server/sim/content/kits/ops/chess_char_3_09-haini.js — 海霓 (char_4079_haini) kit, tier 3.
+// Conventions of the tier-3 kits: ../shared/tier3.js; kit contract and rules: ../README.md.
+
+import { num, defOf, talentBb, altSkills, instantKindOf, alive, onTiles, aura } from '../shared/tier3.js';
+
+/** Non-elite, non-leader enemy (海霓 "非精英和领袖敌人"). */
+const isNormalEnemy = (e) => !e.isBoss && String(e.def?.rank ?? 'NORMAL').toUpperCase() === 'NORMAL';
+
+export default {
+  // ---- 3_09 海霓 · 削弱者 — S2 阻滞性显色剂: ATK +, 2 targets, slows non-elite enemies in range, their deaths raise the
+  //      talent up to max_talent_up; 测绘器材的奇用: non-elite enemies in range are fragile
+  chess_char_3_09_a: (bb, chess, def) => {
+    const d = defOf(chess, def);
+    const t0 = talentBb(d, 0);
+    const slow = num(bb['attack@move_speed'], 0);
+    const up = num(bb['attack@talent_up'], 0), upMax = num(bb['attack@max_talent_up'], 1);
+    const mt = Math.floor(num(bb['attack@max_target'], 1));
+    const kit = {
+      skill: {
+        kind: 'duration',
+        mods: { atkPct: num(bb.atk) },
+        onStart({ battle, unit }) {
+          unit.mem.hainiMul = 1;
+          if (!unit.mem.hainiSlow) {
+            unit.mem.hainiSlow = aura(battle, unit, { key: 'skill:haini_slow', side: 'enemy', interval: 0, tiles: () => unit.rangeKeySet, filter: isNormalEnemy, mods: { moveMul: Math.max(0, 1 + slow) } });
+          }
+          unit.mem.hainiSlow();
+        },
+        onTick({ unit }) { unit.mem.hainiSlow?.(); },
+        onEnd({ unit }) { unit.mem.hainiSlow?.clear(); unit.mem.hainiMul = 1; },
+      },
+      // S1 迷惑性洋流图: next attack ×atk_scale on max_target enemies at once
+      skills: altSkills(chess, d, bb, {
+        skchr_haini_1: (s) => ({
+          kind: instantKindOf(s),
+          targeting: { maxTargets: Math.max(1, Math.floor(num(s.bb.max_target, 1))) },
+          attack: { atkScale: num(s.bb.atk_scale, 1) },
+        }),
+      }),
+      talents: [{ install(battle, unit) {
+        unit.mem.hainiMul = 1;
+        aura(battle, unit, {
+          key: 'talent:haini_fragile', side: 'enemy', tiles: () => unit.rangeKeySet, filter: isNormalEnemy,
+          mods: () => ({ dmgTakenMul: 1 + (num(t0.damage_scale, 1) - 1) * (unit.mem.hainiMul ?? 1) }),
+        });
+        battle.on('kill', (ctx) => {
+          const v = ctx.victim;
+          if (!unit.skill?.active || !alive(unit) || v.side !== 'enemy' || !isNormalEnemy(v)) return;
+          if (!unit.rangeKeySet || !onTiles(v, unit.rangeKeySet)) return;
+          unit.mem.hainiMul = Math.min(upMax, (unit.mem.hainiMul ?? 1) + up);
+        }, { owner: unit });
+      } }],
+    };
+    if (mt > 1) kit.skill.targeting = { maxTargets: mt };
+    return kit;
+  },
+};
@@ -0,0 +1,54 @@
+// server/sim/content/kits/ops/chess_char_3_10-pinecn.js — 松果 (char_440_pinecn) kit, tier 3.
+// Conventions of the tier-3 kits: ../shared/tier3.js; kit contract and rules: ../README.md.
+
+import { num, defOf, talentBb, selectedId, altSkills, instantKindOf, copyGrid } from '../shared/tier3.js';
+
+export default {
+  // ---- 3_10 松果 · 散射手 — S2 电能过载: ATK + growing with each use (a→d), shorter range; 便携电源: SP regen for 60 s
+  chess_char_3_10_a: (bb, chess, def) => {
+    const d = defOf(chess, def);
+    const t0 = talentBb(d, 0);
+    const sel = selectedId(chess, d);
+    const steps = Object.keys(bb).filter((k) => /\[[a-z]\]\.atk$/.test(k)).sort().map((k) => num(bb[k]));
+    if (!steps.length) steps.push(num(bb.atk));
+    const skillGrid = copyGrid(d.skill?.rangeGrid);
+    const kit = {
+      skill: {
+        kind: 'duration',
+        onStart({ battle, unit, skill }) {
+          const atk = steps[Math.min(steps.length - 1, Math.max(0, skill.activations - 1))];
+          battle.addBuff(unit, { key: 'skill:pinecn_atk', mods: { atkPct: atk } });
+        },
+        onEnd({ battle, unit }) { battle.removeBuff(unit, 'skill:pinecn_atk'); },
+      },
+      // S1 RMA长钉 (charges): "立即以165%的攻击力进行一次攻击，无视敌人180的防御力" — an extra shot fired at once (all
+      // enemies in range, front-row × of the trait), on top of the normal attack it was cast before
+      skills: altSkills(chess, d, bb, {
+        skchr_pinecn_1: (s) => ({
+          kind: instantKindOf(s),
+          // (the DEF ignore rides on the shots' tag: they land after the instant skill has ended)
+          attack: { atkScale: num(s.bb.atk_scale, 1), tags: ['skill', 'pinecnSpike'] },
+          onStart({ battle, unit }) { battle.forceAttack(unit); },
+        }),
+      }),
+      talents: [{ install(battle, unit) {
+        battle.on('deploy', (ctx) => {
+          if (ctx.unit === unit) battle.addBuff(unit, { key: 'talent:pinecn_power', duration: num(t0.duration, 60), mods: { spRecoveryFlat: num(t0.sp_recovery_per_sec) } });
+        }, { owner: unit });
+      } }],
+    };
+    if (sel === 'skchr_pinecn_1') {
+      const pen = num(bb.def_penetrate_fixed, 0);
+      kit.install = (battle, unit) => battle.on('hit', (ctx) => {
+        if (ctx.source === unit && pen > 0 && ctx.dmg.tags?.includes('pinecnSpike')) ctx.dmg.defIgnoreFlat += pen;
+      }, { owner: unit });
+    }
+    if (skillGrid) {
+      kit.skill.targeting = { rangeGrid: skillGrid };
+      // "攻击范围缩短": offensive skills fire with an enemy inside the SKILL range (research 03 §1.4) — with the
+      // initial (wider) range she would open the skill on enemies the shortened range cannot reach
+      kit.skill.trigger = { rule: 'CUSTOM_RANGE', grid: skillGrid };
+    }
+    return kit;
+  },
+};
@@ -0,0 +1,74 @@
+// server/sim/content/kits/ops/chess_char_3_11-snhunt.js — 雪猎 (char_4211_snhunt) kit, tier 3.
+// Conventions of the tier-3 kits: ../shared/tier3.js; kit contract and rules: ../README.md.
+
+import {
+  num, defOf, talentBb, traitBb, selectedId, altSkills, instantKindOf, alive, fx, textNum, enemiesOn,
+} from '../shared/tier3.js';
+
+export default {
+  // ---- 3_11 雪猎 · 猎手 — S2 风雪连弩: instant special-bullet double shot (higher vs non-moving targets), charges;
+  //      裂云一击: the skill also sends 裂云兽 (ATK% phys + cold); 精锐 module HUN-X: reload from empty adds extra rounds
+  //      S1 强力击·β型: next attack ×atk_scale (a normal shot: needs a round); 裂云兽 hits the enemy it is cast on
+  chess_char_3_11_a: (bb, chess, def) => {
+    const d = defOf(chess, def);
+    const t0 = talentBb(d, 0);
+    const tb = traitBb(d);
+    const sel = selectedId(chess, d);
+    const S2 = 'skchr_snhunt_2';
+    const s1 = num(bb.atk_scale_1, 1), s2 = num(bb.atk_scale_2, s1);
+    const charges = Math.max(1, Math.floor(num(d.skill?.maxCharges, num(bb.ct, 1))));
+    const shots = textNum(d.skill?.description, /(\d+|[一二两三四五])连击/, 2);
+    const still = (e) => !!(e.blockedBy || e.s.flags.stun || e.s.flags.noMove || !e.moving);
+    const extra = num(tb.extra_add, 0);
+    return {
+      skill: {
+        kind: charges > 1 ? 'charges' : 'instant',
+        onStart({ battle, unit }) {
+          const t = enemiesOn(battle, unit, unit.rangeKeys, 1, unit.profile)[0] ?? null;
+          unit.mem.snTarget = t;
+          if (!t) return;
+          battle.addProjectile({
+            from: unit, target: t, speed: 16, visual: 'arrow', source: unit,
+            onHit: ({ target }) => {
+              if (!target || !target.alive) return;
+              const sc = still(target) ? s2 : s1;
+              for (let i = 0; i < shots && target.alive; i++) battle.dealDamage(unit, target, { amount: unit.s.atk * sc, type: 'phys', isSkill: true, tags: ['skill', 'snhunt'] });
+            },
+          });
+          fx(battle, 'volley', unit, { target: t.id, skill: 'snhunt_2' });
+        },
+      },
+      skills: altSkills(chess, d, bb, {
+        skchr_snhunt_1: (s) => ({ kind: instantKindOf(s), attack: { atkScale: num(s.bb.atk_scale, 1) } }),
+      }),
+      talents: [{ install(battle, unit) {
+        battle.on('skillStart', (ctx) => {
+          if (ctx.unit !== unit) return;
+          // S2 aims its special bullets itself (mem.snTarget); another skill is cast on the enemy about to be shot
+          const t = sel === S2 || sel == null ? unit.mem.snTarget : (enemiesOn(battle, unit, unit.rangeKeys, 1, unit.profile)[0] ?? null);
+          if (!t || !t.alive) return;
+          battle.dealDamage(unit, t, { amount: unit.s.atk * num(t0.atk_scale, 1), type: 'phys', isSkill: true, tags: ['talent', 'cloudbeast'] });
+          if (t.alive) battle.applyStatus(t, 'cold', { duration: num(t0.cold, 3), source: unit });
+          fx(battle, 'strike', t, { src: unit.id, talent: 'snhunt_beast' });
+        }, { owner: unit });
+      } }],
+      install(battle, unit) {
+        // special bullets (S2 only): the skill also fires while the magazine is empty (the attack loop cannot run then)
+        if (sel === S2 || sel == null) {
+          battle.on('tick', () => {
+            const sk = unit.skill;
+            if (!alive(unit) || !unit.canAct || !sk || !sk.ready || sk.opCooling || unit.s.flags.silence || (unit.trait.ammo ?? 1) > 0) return;
+            if (battle.enemiesInKeys(unit.baseRangeKeys || unit.rangeKeys, unit, unit.profile).length) sk.activate('DEFAULT');
+          }, { owner: unit });
+        }
+        if (extra > 0) {
+          battle.on('tick', () => {
+            const a = unit.trait.ammo ?? 0;
+            if (unit.mem.prevAmmo === 0 && a === 1) unit.trait.ammo = Math.min(Math.max(1, unit.profile.ammoMax ?? 8), a + extra);
+            unit.mem.prevAmmo = unit.trait.ammo;
+          }, { owner: unit });
+        }
+      },
+    };
+  },
+};
@@ -0,0 +1,127 @@
+// server/sim/content/kits/ops/chess_char_3_12-blemsh.js — 瑕光 (char_423_blemsh) kit, tier 3.
+// Conventions of the tier-3 kits: ../shared/tier3.js; kit contract and rules: ../README.md.
+
+import { bodyOnTile } from '../../../body.js';
+import {
+  num, defOf, talentBb, traitBb, altSkills, instantKindOf, alive, onTiles, gridKeys, fx, copyGrid, NINE, isLeader,
+  giveSp,
+} from '../shared/tier3.js';
+
+export default {
+  // ---- 3_12 瑕光 · 守护者 — S3 先贤化身: ATK/DEF +, bonus arts per hit, heals another nearby ally per attack;
+  //      剑盾骑士: hurt-SP skills of the team also gain SP on attack; 仁慈: attacks sleeping enemies (first, ×atk_scale);
+  //      精锐 module GUA-Y: damage taken −15 %
+  //      S1 光芒涌动 (自动触发 ⇒ DEFAULT, charges): next attack ×atk_scale phys + heals the most injured ally of the 3×3 (herself
+  //      included) for heal_scale × ATK; S2 慑敌辉光: ATK +, puts every ground enemy on her own tile and every enemy she
+  //      blocks to sleep (PRTS 备注; for the skill's duration: no own value in the data) and heals every ally of the
+  //      skill range by ATK × ratio each second;
+  //      精锐 module GUA-X: her heals on allies under hp_ratio HP × heal_scale
+  chess_char_3_12_a: (bb, chess, def) => {
+    const d = defOf(chess, def);
+    const t0 = talentBb(d, 0), t1 = talentBb(d, 1);
+    const tb = traitBb(d);
+    const bonus = num(bb['attack@blemsh_s_3_extra_dmg[magic].atk_scale'], 0);
+    const heal = num(bb.heal_scale, 0);
+    const healGrid = copyGrid(d.skill?.rangeGrid) ?? NINE;
+    const mercy = num(t1.atk_scale, 1);
+    const sleepersInRange = (battle, unit) => {
+      const set = unit.rangeKeySet;
+      return set ? battle.enemies.filter((e) => e.alive && !e.hidden && e.s.flags.sleep && !e.s.flags.untargetable && !e.isFlying && onTiles(e, set)) : [];
+    };
+    const kit = {
+      trait: { hitSleep: true }, // 仁慈: 自身可以攻击…沉睡的目标 (沉睡 = 无敌 for everyone else)
+      skill: {
+        kind: 'duration',
+        mods: { atkPct: num(bb.atk), defPct: num(bb.def) },
+        heal: false,
+        attack: { onHit({ battle, unit, target }) {
+          if (bonus > 0 && target && target.alive) battle.dealDamage(unit, target, { amount: unit.s.atk * bonus, type: 'arts', isSkill: true, tags: ['skill', 'blemshBonus'] });
+        } },
+        onAttack({ battle, unit }) {
+          if (!(heal > 0)) return;
+          const ally = battle.injuredAlliesInKeys(new Set(gridKeys(healGrid, unit)), unit).find((a) => a !== unit);
+          if (ally) battle.heal(unit, ally, unit.s.atk * heal);
+        },
+      },
+      skills: altSkills(chess, d, bb, {
+        skchr_blemsh_1: (s) => {
+          const grid = copyGrid(s.rangeGrid) ?? NINE;
+          const hs = num(s.bb.heal_scale, 0);
+          return {
+            kind: instantKindOf(s),
+            heal: false,
+            attack: {
+              atkScale: num(s.bb.atk_scale, 1),
+              onHit({ battle, unit }) { // "恢复周围一名友方单位"
+                const ally = hs > 0 ? battle.injuredAlliesInKeys(new Set(gridKeys(grid, unit)), unit)[0] : null;
+                if (ally) battle.heal(unit, ally, unit.s.atk * hs);
+              },
+            },
+          };
+        },
+        skchr_blemsh_2: (s) => {
+          const grid = copyGrid(s.rangeGrid) ?? NINE;
+          const ratio = num(s.bb['attack@atk_to_hp_recovery_ratio'], num(s.bb.atk_to_hp_recovery_ratio, 0));
+          return {
+            kind: 'duration',
+            heal: false,
+            mods: { atkPct: num(s.bb.atk) },
+            onStart({ battle, unit, skill }) {
+              const dur = skill.timeLeft > 0 ? skill.timeLeft : Math.max(0.1, num(s.duration, 10));
+              let n = 0;
+              // PRTS 备注: "技能生效对象实际为“自身这格内的所有地面敌人及自身阻挡的敌人”，即使阻挡的是飞行敌人" — a blocked
+              // enemy stands at the block radius, outside her tile (Battle._checkBlock)
+              for (const e of battle.enemies) {
+                if (!e.alive || e.hidden) continue;
+                if (e.blockedBy !== unit && (e.isFlying || !bodyOnTile(e, unit.tileR, unit.tileC))) continue;
+                if (battle.applyStatus(e, 'sleep', { duration: dur, source: unit })) n++;
+              }
+              fx(battle, 'aoe', unit, { radius: 0.5, skill: 'blemsh_2', status: 'sleep', n });
+              unit.mem.blemshRegen = 0;
+            },
+            onTick({ battle, unit, dt }) { // "周围的所有友方单位每秒恢复相当于攻击力N%的生命值"
+              if (!(ratio > 0)) return;
+              unit.mem.blemshRegen = (unit.mem.blemshRegen ?? 0) + dt;
+              while (unit.mem.blemshRegen >= 1 - 1e-9) {
+                unit.mem.blemshRegen -= 1;
+                for (const a of battle.injuredAlliesInKeys(new Set(gridKeys(grid, unit)), unit)) battle.heal(unit, a, unit.s.atk * ratio);
+              }
+            },
+          };
+        },
+      }),
+      talents: [
+        { install(battle, unit) {
+          unit.mem.blemshKnight = true;
+          battle.on('attack', (ctx) => {
+            const a = ctx.attacker;
+            if (!a || a.kind !== 'op' || a.ownerId !== unit.ownerId || a.skill?.spType !== 'hurt') return;
+            if (!alive(unit) || !isLeader(battle, unit, 'blemshKnight')) return;
+            giveSp(a, num(t0.sp, 1), 'talent');
+          }, { owner: unit });
+        } },
+        { install(battle, unit) {
+          battle.on('beforeAttack', (ctx) => {
+            if (ctx.attacker !== unit) return;
+            const s = sleepersInRange(battle, unit);
+            if (s.length) ctx.targets = [s[0], ...ctx.targets.filter((t) => t !== s[0])].slice(0, Math.max(1, ctx.targets.length));
+          }, { owner: unit });
+          battle.on('hit', (ctx) => {
+            if (ctx.source === unit && ctx.target.side === 'enemy' && ctx.target.s.flags.sleep) ctx.dmg.mul *= mercy;
+          }, { owner: unit });
+          // (a lone sleeper is found by the engine's own target search: `trait.hitSleep` makes sleepers targetable
+          // and damageable for her only)
+        } },
+      ],
+    };
+    if (num(tb.damage_resistance) > 0) {
+      kit.install = (battle, unit) => battle.addBuff(unit, { key: 'trait:blemsh_guard', mods: { dmgTakenMul: 1 - num(tb.damage_resistance) }, persist: true, allowDead: true });
+    } else if (num(tb.heal_scale) > 0) {
+      // GUA-X "治疗生命值低于50%的友方单位时治疗量提升15%" (the HP before the heal)
+      kit.install = (battle, unit) => battle.on('heal', (ctx) => {
+        if (ctx.source === unit && ctx.target && ctx.target.hpRatio < num(tb.hp_ratio, 0.5)) ctx.amount *= num(tb.heal_scale, 1);
+      }, { owner: unit });
+    }
+    return kit;
+  },
+};
@@ -0,0 +1,25 @@
+// server/sim/content/kits/ops/chess_char_3_13-malist.js — 至简 (char_4054_malist) kit, tier 3.
+// Conventions of the tier-3 kits: ../shared/tier3.js; kit contract and rules: ../README.md.
+
+import { num, defOf, talentBb, altSkills, statSkill, textNum, funnelMap, installFunnelPrune } from '../shared/tier3.js';
+
+export default {
+  // ---- 3_13 至简 · 驭械术师 — S2 神工意匠: next attack ATK% arts twice (charges); 忽有所悟: prob of ATK ×atk_scale per attack
+  chess_char_3_13_a: (bb, chess, def) => {
+    const d = defOf(chess, def);
+    const t0 = talentBb(d, 0);
+    const charges = Math.max(1, Math.floor(num(d.skill?.maxCharges, num(bb.ct, 1))));
+    const hits = textNum(d.skill?.description, /连续攻击(\d+|[一二两三四五])次/, 2);
+    const insight = (battle) => (battle.rng.chance(num(t0.prob, 0)) ? num(t0.atk_scale, 1) : 1);
+    return {
+      trait: { dmgMul: (battle, unit, target) => funnelMap(battle, unit, target) * insight(battle) },
+      skill: {
+        kind: charges > 1 ? 'charges' : 'instant',
+        attack: { atkScale: num(bb.atk_scale, 1), hits, dmgType: 'arts', dmgMul: (battle) => insight(battle) },
+      },
+      // S1 迅捷打击·γ型: ATK / ASPD + (the drones' ramp and 忽有所悟 stay on every attack through the trait)
+      skills: altSkills(chess, d, bb, { 'skcom_quickattack[3]': statSkill }),
+      install: installFunnelPrune,
+    };
+  },
+};
@@ -0,0 +1,55 @@
+// server/sim/content/kits/ops/chess_char_3_14-slbell.js — 初雪 (char_174_slbell) kit, tier 3.
+// Conventions of the tier-3 kits: ../shared/tier3.js; kit contract and rules: ../README.md.
+
+import { num, defOf, talentBb, altSkills, aura } from '../shared/tier3.js';
+
+export default {
+  // ---- 3_14 初雪 · 削弱者 — S2 自然震慑: DEF/RES shred aura on every enemy in range; 虚弱化: low-HP enemies fragile;
+  //      双响: 2 targets
+  chess_char_3_14_a: (bb, chess, def) => {
+    const d = defOf(chess, def);
+    const t0 = talentBb(d, 0), t1 = talentBb(d, 1);
+    const mr = num(bb.magic_resistance, 0);
+    const shred = { defPct: num(bb.def) };
+    if (mr) {
+      if (Math.abs(mr) < 1) shred.resMul = Math.max(0, 1 + mr);
+      else shred.resFlat = mr;
+    }
+    const mt = Math.floor(num(t1['attack@max_target'], 1));
+    const kit = {
+      skill: {
+        kind: 'duration',
+        onStart({ battle, unit }) {
+          if (!unit.mem.slbellAura) unit.mem.slbellAura = aura(battle, unit, { key: 'skill:slbell_shred', side: 'enemy', interval: 0, tiles: () => unit.rangeKeySet, mods: shred });
+          unit.mem.slbellAura();
+        },
+        onTick({ unit }) { unit.mem.slbellAura?.(); },
+        onEnd({ unit }) { unit.mem.slbellAura?.clear(); },
+      },
+      // S1 传音回响: 2 targets, every enemy in range ASPD + attack_speed (negative) while it runs
+      skills: altSkills(chess, d, bb, {
+        skchr_slbell_1: (s) => {
+          const slow = { aspd: num(s.bb.attack_speed) };
+          return {
+            kind: 'duration',
+            targeting: { maxTargets: Math.max(1, Math.floor(num(s.bb['attack@max_target'], num(s.bb.max_target, 1)))) },
+            onStart({ battle, unit }) {
+              if (!unit.mem.slbellSlow) unit.mem.slbellSlow = aura(battle, unit, { key: 'skill:slbell_aspd', side: 'enemy', interval: 0, tiles: () => unit.rangeKeySet, mods: slow });
+              unit.mem.slbellSlow();
+            },
+            onTick({ unit }) { unit.mem.slbellSlow?.(); },
+            onEnd({ unit }) { unit.mem.slbellSlow?.clear(); },
+          };
+        },
+      }),
+      talents: [{ install(battle, unit) {
+        aura(battle, unit, {
+          key: 'talent:weak_fragile', side: 'enemy', tiles: () => unit.rangeKeySet, filter: (e) => e.hpRatio < num(t0.hp_ratio, 0.4),
+          mods: { dmgTakenMul: num(t0.damage_scale, 1) }, interval: 0.1,
+        });
+      } }],
+    };
+    if (mt > 1) kit.trait = { maxTargets: mt };
+    return kit;
+  },
+};
@@ -0,0 +1,29 @@
+// server/sim/content/kits/ops/chess_char_3_15-vodfox.js — 巫恋 (char_254_vodfox) kit, tier 3 (hidden).
+// Conventions of the tier-3 kits: ../shared/tier3.js; kit contract and rules: ../README.md.
+
+import { releaseSkillSummon } from '../../tokens.js';
+import { num, defOf, talentBb, aura } from '../shared/tier3.js';
+
+export default {
+  // ---- 3_15 巫恋 · 削弱者 (hidden) — S2 诅咒娃娃 "获得一个诅咒娃娃（最多可库存1个）": the doll is a hand piece the player
+  //      places (user playtest #6; PRTS 卫戍协议/帮助); each cast gives one and the placed piece takes the field on its
+  //      own tile (tokens.js releaseSkillSummon: not at the battle start; not placed ⇒ no doll); its token kit keeps the
+  //      3×3 ATK/DEF aura (the token skill's bb) for 15 s; 溃败暗示: low-HP enemies fragile
+  chess_char_3_15_a: (bb, chess, def) => {
+    const d = defOf(chess, def);
+    const t0 = talentBb(d, 0);
+    const tokenId = chess?.skill?.overrideTokenKey ?? (d.tokens || []).find((t) => /doll/.test(String(t))) ?? 'token_10006_vodfox_doll';
+    return {
+      skill: {
+        kind: 'instant',
+        onStart({ battle, unit }) { releaseSkillSummon(battle, unit, tokenId); },
+      },
+      talents: [{ install(battle, unit) {
+        aura(battle, unit, {
+          key: 'talent:weak_fragile', side: 'enemy', tiles: () => unit.rangeKeySet, filter: (e) => e.hpRatio < num(t0.hp_ratio, 0.4),
+          mods: { dmgTakenMul: num(t0.damage_scale, 1) }, interval: 0.1,
+        });
+      } }],
+    };
+  },
+};
@@ -0,0 +1,26 @@
+// server/sim/content/kits/ops/chess_char_3_16-snakek.js — 蛇屠箱 (char_150_snakek) kit, tier 3.
+// Conventions of the tier-3 kits: ../shared/tier3.js; kit contract and rules: ../README.md.
+
+import { num, defOf, talentBb, traitBb, altSkills, statSkill, whileTrue } from '../shared/tier3.js';
+
+export default {
+  // ---- 3_16 蛇屠箱 · 铁卫 — S2 壳状防御: stops attacking, block +1, DEF +, regen; 防御专精: DEF +;
+  //      精锐 module PRO-X: DEF + while blocking
+  chess_char_3_16_a: (bb, chess, def) => {
+    const d = defOf(chess, def);
+    const t0 = talentBb(d, 0);
+    const tb = traitBb(d);
+    const kit = {
+      skill: {
+        kind: 'duration',
+        mods: { defPct: num(bb.def), blockCnt: num(bb.block_cnt), hpRegenRatio: num(bb.hp_recovery_per_sec_by_max_hp_ratio) },
+        attack: { noAttack: true },
+      },
+      // S1 防御力强化·β型 (TAKE_DAMAGE): DEF + (she keeps attacking)
+      skills: altSkills(chess, d, bb, { 'skcom_def_up[2]': statSkill }),
+      talents: [{ install(battle, unit) { battle.addBuff(unit, { key: 'talent:snakek_def', mods: { defPct: num(t0.def) }, persist: true, allowDead: true }); } }],
+    };
+    if (num(tb.def) > 0) kit.install = (battle, unit) => whileTrue(battle, unit, 'trait:snakek_block', () => unit.blocking.length > 0, { defPct: num(tb.def) });
+    return kit;
+  },
+};
@@ -0,0 +1,41 @@
+// server/sim/content/kits/ops/chess_char_3_17-shotst.js — 流星 (char_126_shotst) kit, tier 3.
+// Conventions of the tier-3 kits: ../shared/tier3.js; kit contract and rules: ../README.md.
+
+import { num, defOf, talentBb, altSkills, instantKindOf, fx, textNum, enemiesOn } from '../shared/tier3.js';
+
+export default {
+  // ---- 3_17 流星 · 速射手 — S2 碎甲击·扩散: instant ATK% phys on ≤5 enemies in range + DEF shred for `duration` s;
+  //      空射专精: ×atk_scale vs flying (stacks with the module fly bonus)
+  chess_char_3_17_a: (bb, chess, def) => {
+    const d = defOf(chess, def);
+    const t0 = talentBb(d, 0);
+    const n = textNum(d.skill?.description, /至多(\d+)个/, 5);
+    const flyMul = (unit, t) => (t.isFlying ? (unit.profile.flyScale ?? 1) * num(t0.atk_scale, 1) : 1);
+    return {
+      trait: { dmgMul: (battle, unit, target) => flyMul(unit, target) },
+      skill: {
+        kind: 'instant',
+        onStart({ battle, unit }) {
+          const list = enemiesOn(battle, unit, unit.rangeKeys, n, unit.profile);
+          for (const e of list) {
+            battle.dealDamage(unit, e, { amount: unit.s.atk * num(bb.atk_scale, 1) * flyMul(unit, e), type: 'phys', isSkill: true, tags: ['skill', 'burst'] });
+            if (e.alive) battle.addBuff(e, { key: 'skill:shotst_shred', duration: num(bb.duration, 5), refresh: 'extend', mods: { defPct: num(bb.def) }, source: unit, visible: true });
+          }
+          if (list.length) fx(battle, 'volley', unit, { targets: list.map((e) => e.id), skill: 'shotst_2' });
+        },
+      },
+      // S1 碎甲击: next attack ×atk_scale (fly × of the trait kept) and the target's DEF − for `duration` s
+      skills: altSkills(chess, d, bb, {
+        skchr_shotst_1: (s) => ({
+          kind: instantKindOf(s),
+          attack: {
+            atkScale: num(s.bb.atk_scale, 1),
+            onHit({ battle, unit, target }) {
+              if (target && target.alive && target.side === 'enemy') battle.addBuff(target, { key: 'skill:shotst_shred', duration: num(s.bb.duration, 5), refresh: 'extend', mods: { defPct: num(s.bb.def) }, source: unit, visible: true });
+            },
+          },
+        }),
+      }),
+    };
+  },
+};
@@ -0,0 +1,127 @@
+// server/sim/content/kits/ops/chess_char_3_18-vulpis.js — 忍冬 (char_4026_vulpis) kit, tier 3.
+// Conventions of the tier-3 kits: ../shared/tier3.js; kit contract and rules: ../README.md.
+
+import {
+  num, defOf, talentBb, traitBb, altSkills, instantKindOf, alive, gridKeys, fx, copyGrid, enemiesOn, whileTrue,
+  isLeader,
+} from '../shared/tier3.js';
+
+/** 忍冬 S3's 迷彩 (until her next cast): its own buff key, never merged with another unit status. */
+const CAMOU_KEY = 'vulpis:camou';
+
+export default {
+  // ---- 3_18 忍冬 · 尖兵 — S3 隐狐之艺: +DP, range +1, ATK +, decaying ASPD, hits all blocked, 0.2 s stun per hit,
+  //      after a kill during the skill 迷彩 from its end until the next cast ("进入迷彩状态，直至下一次开启技能") — the
+  //      `camou` status under its own key (ba.camou "不阻挡时不成为敌方普通攻击的目标": only the enemy she blocks attacks
+  //      her, as with 隐匿; it used to be the generic `stealth` = 隐匿 under the key `stealth`, shared with 伪装服's timed
+  //      隐匿, which the unending one then made permanent, and it counted as 隐匿 for 叙拉古 / 家族徽章 — user playtest #6
+  //      "叙拉古阵营隐身不会结束": the bond's 隐匿 ends on time, this 迷彩 officially lasts); 追凶: bonus arts on marked
+  //      enemies; 蓄势: DP regen + out-of-combat
+  //      regen; 精锐 module SOL-X: ATK/DEF + while blocking
+  //      S1 小施惩戒 (charges): next attack + extra_damage_ratio × ATK arts and +cost DP; S2 坠刃拷问 (charges, the data rule
+  //      SKILL_RANGE: fires once an enemy is inside its own range 3-12, charges 3 s apart): +cost DP, ≤ max_target enemies of that range take atk_scale arts and
+  //      停顿 — the ones already 停顿 are also stunned. (SOL-Y "首次部署时部署费用-4": the initial deployment is free.)
+  chess_char_3_18_a: (bb, chess, def) => {
+    const d = defOf(chess, def);
+    const t0 = talentBb(d, 0), t1 = talentBb(d, 1);
+    const tb = traitBb(d);
+    const skillGrid = copyGrid(d.skill?.rangeGrid);
+    const aspd0 = num(bb.attack_speed, 0);
+    const kit = {
+      skill: {
+        kind: 'duration',
+        mods: { atkPct: num(bb.atk) },
+        attack: { hitAllBlocked: true, onHitStatus: { key: 'stun', duration: num(bb['attack@stun'], 0.2) } },
+        onStart({ battle, unit, skill }) {
+          battle.removeBuff(unit, CAMOU_KEY);
+          unit.mem.vulpisKill = false;
+          const dp = num(bb.cost, 0);
+          if (dp > 0) { battle.addDp(unit.ownerId, dp); fx(battle, 'dp', unit, { n: dp }); }
+          battle.addBuff(unit, { key: 'skill:vulpis_aspd', mods: { aspd: aspd0 } });
+          unit.mem.vulpisDur = skill.timeLeft;
+        },
+        onTick({ battle, unit, skill }) {
+          const b = unit.findBuff('skill:vulpis_aspd');
+          const dur = unit.mem.vulpisDur || skill.duration || 1;
+          if (b) { b.mods = { aspd: aspd0 * Math.max(0, skill.timeLeft) / dur }; unit.markDirty(); }
+        },
+        onEnd({ battle, unit, reason }) {
+          battle.removeBuff(unit, 'skill:vulpis_aspd');
+          if (reason !== 'death' && unit.alive && unit.mem.vulpisKill) {
+            battle.addBuff(unit, { key: CAMOU_KEY, flags: { camou: true }, status: 'camou', source: unit });
+            fx(battle, 'camouflage', unit);
+          }
+        },
+      },
+      skills: altSkills(chess, d, bb, {
+        skchr_vulpis_1: (s) => ({
+          kind: instantKindOf(s),
+          attack: { onHit({ battle, unit, target }) {
+            if (target && target.alive) battle.dealDamage(unit, target, { amount: unit.s.atk * num(s.bb.extra_damage_ratio), type: 'arts', isSkill: true, tags: ['skill', 'vulpisPunish'] });
+            const dp = num(s.bb.cost, 0);
+            if (dp > 0) { battle.addDp(unit.ownerId, dp); fx(battle, 'dp', unit, { n: dp }); }
+          } },
+        }),
+        skchr_vulpis_2: (s) => { // 坠刃拷问 — air units too (PRTS 备注 "※可对空"); data trigger SKILL_RANGE (its 3-12 range)
+          const grid = copyGrid(s.rangeGrid);
+          const n = Math.max(1, Math.floor(num(s.bb.max_target, 6)));
+          return {
+            kind: instantKindOf(s),
+            onStart({ battle, unit }) {
+              const dp = num(s.bb.cost, 0);
+              if (dp > 0) { battle.addDp(unit.ownerId, dp); fx(battle, 'dp', unit, { n: dp }); }
+              const list = enemiesOn(battle, unit, gridKeys(grid ?? unit.rangeGrid, unit), n);
+              for (const e of list) {
+                const was = !!e.findBuff('sluggish'); // "若敌人已经处于停顿状态" (before this cast)
+                battle.dealDamage(unit, e, { amount: unit.s.atk * num(s.bb.atk_scale, 1), type: 'arts', isSkill: true, tags: ['skill', 'vulpisTorture'] });
+                if (!e.alive) continue;
+                battle.applyStatus(e, 'sluggish', { duration: num(s.bb.sluggish, 0), source: unit });
+                if (was && e.alive) battle.applyStatus(e, 'stun', { duration: num(s.bb.stun, 0), source: unit });
+              }
+              if (list.length) fx(battle, 'aoe', unit, { radius: 1.5, dmgType: 'arts', skill: 'vulpis_2', n: list.length });
+            },
+          };
+        },
+      }),
+      talents: [
+        { install(battle, unit) { // 追凶
+          const marks = new Map();
+          // re-entrancy guard: content that turns a hit into HP loss credited to her (频次 enemies: every instance
+          // = 1 HP) would otherwise feed the bonus back into itself until the hook-depth limit
+          let busy = false;
+          battle.on('damaged', (ctx) => {
+            const e = ctx.target;
+            if (busy || ctx.source !== unit || e.side !== 'enemy' || ctx.type === 'element' || ctx.dmg?.tags?.includes('vulpisHunt')) return;
+            const t = marks.get(e.id);
+            if (t == null) { marks.set(e.id, battle.time); return; }
+            if (battle.time - t <= num(t0.interval, 10) + 1e-9 && e.alive) {
+              busy = true;
+              // PRTS 备注 "伤害类型为法术附加伤害": tag addition (no 叙拉古 6 roll)
+              try { battle.dealDamage(unit, e, { amount: unit.s.atk * num(t0.atk_scale), type: 'arts', canDodge: false, tags: ['talent', 'vulpisHunt', 'addition'] }); } finally { busy = false; }
+            }
+          }, { owner: unit });
+          battle.on('kill', (ctx) => { if (ctx.killer === unit && unit.skill?.active) unit.mem.vulpisKill = true; }, { owner: unit });
+        } },
+        { install(battle, unit) { // 蓄势
+          unit.mem.vulpisDp = true;
+          const bonus = num(t1.delta_cost_increase_time, 1) - 1;
+          const quiet = num(t1.interval, 4);
+          const regen = num(t1['vulpis_t_2[heal][interval].hp_recovery_per_sec_by_max_hp_ratio'], 0);
+          battle.on('tick', (ctx) => {
+            if (!alive(unit)) return;
+            if (bonus > 0 && isLeader(battle, unit, 'vulpisDp')) battle.addDp(unit.ownerId, battle.flags.dpPerSec * ctx.dt * bonus);
+            const on = battle.time - unit.lastHitAt >= quiet && regen > 0;
+            const has = !!unit.findBuff('talent:vulpis_regen');
+            if (on && !has) battle.addBuff(unit, { key: 'talent:vulpis_regen', mods: { hpRegenRatio: regen } });
+            else if (!on && has) battle.removeBuff(unit, 'talent:vulpis_regen');
+          }, { owner: unit });
+        } },
+      ],
+    };
+    if (skillGrid) kit.skill.targeting = { rangeGrid: skillGrid };
+    if (num(tb.atk) > 0 || num(tb.def) > 0) {
+      kit.install = (battle, unit) => whileTrue(battle, unit, 'trait:vulpis_block', () => unit.blocking.length > 0, { atkPct: num(tb.atk), defPct: num(tb.def) });
+    }
+    return kit;
+  },
+};
@@ -0,0 +1,240 @@
+// server/sim/content/kits/ops/chess_char_3_19-vigil.js — 伺夜 (char_427_vigil) kit, tier 3.
+// Conventions of the tier-3 kits: ../shared/tier3.js; kit contract and rules: ../README.md.
+
+import { num, defOf, talentBb, selectedId, altSkills, alive, fx, textNum, tacticalPoint } from '../shared/tier3.js';
+
+/** Tokens `tokenId` summoned by / placed for `owner` (board pieces included). */
+const tokensOf = (battle, owner, tokenId) => battle.allyUnits.filter((t) => t.kind === 'token' && t.defId === tokenId && t.ownerUnit === owner && !t.mem.isClone);
+
+export default {
+  // ---- 3_19 伺夜 · 战术家 — the tactical reinforcement is the wolf pack (狼群领袖: 2 wolves, +1 every 25 s up to 3, each
+  //      wolf = +1 block and one more bite, a wolf is lost instead of the pack dying); 狼群天性: DEF ignore vs pack-blocked
+  //      enemies; S3 领袖的尊严: DP over time, 三连击, bonus arts vs pack-blocked enemies; 精锐 module: pack takes less
+  //      damage from the enemies it blocks (token module talent). A 狼群 piece placed in the prep phase is the pack.
+  //      S1 领袖的呼唤 (ALWAYS): +cost DP and one more “狼影” (≤ the talent's maximum); S2 领袖的馈赠: +cost DP, the pack
+  //      recovers hp_ratio of its max HP and its next attack hits ×atk_scale — a kill by that attack gives +cost DP.
+  //      精锐 module TAC-Y: trait ×165 % (profession layer) and "援军阻挡的敌人更容易受到我方的攻击": the pack's token module
+  //      talent taunt_level (+1) goes to the enemies it blocks — the enemy-side 嘲讽等级 our operators target first
+  //      (targeting.js; research 05: "更容易受到我方的攻击" = enemy taunt.taunt_level), never to the pack itself.
+  chess_char_3_19_a: (bb, chess, def) => {
+    const d = defOf(chess, def);
+    const sel = selectedId(chess, d);
+    const t0 = d.talents?.[0] ?? {}, t1 = talentBb(d, 1);
+    const wolfId = t0.tokenKey ?? (d.tokens || []).find((t) => /wolf/.test(String(t))) ?? 'token_10028_vigil_wolf';
+    const initial = textNum(t0.description, /初始(\d+|[一二两三四五])只/, 2);
+    const maxWolves = textNum(t0.description, /至多(\d+|[一二两三四五])只/, 3);
+    const hits = textNum(d.skill?.description, /(\d+|[一二两三四五])连击/, 3);
+    const bonus = num(bb['attack@vigil_s_3.atk_scale'], 0);
+    const pen = num(t1.def_penetrate_fixed, 0);
+    const wolfOf = (u) => (u.trait.reinforcement && u.trait.reinforcement.alive ? u.trait.reinforcement : null);
+    const wolfKit = (vigil) => ({
+      skill: null,
+      trait: { hitsFn: (b, w) => Math.max(1, w.mem.wolves || 1) },
+      install(battle, w) {
+        const tal = w.def.talents || [];
+        const wb = tal[0]?.bb ?? {};
+        const per = num(wb.block_cnt, num(wb['vigil_wolf_t_1_enhance[trigger].block_cnt'], 1));
+        const grow = num(wb.interval, num(wb['vigil_wolf_t_1_enhance[trigger].interval'], 25));
+        // (mem.shadows mirrors the count for content reading tokens.js wolfShadows())
+        const apply = () => { w.mem.shadows = w.mem.wolves; battle.addBuff(w, { key: 'token:wolves', mods: { blockCnt: per * w.mem.wolves }, allowDead: true }); };
+        w.mem.wolves = Math.max(1, Math.min(maxWolves, initial));
+        apply();
+        w.mem.addWolf = () => {
+          if (!w.alive || w.mem.wolves >= maxWolves) return false;
+          w.mem.wolves++;
+          apply();
+          fx(battle, 'summon', w, { src: vigil.id, wolves: w.mem.wolves });
+          return true;
+        };
+        battle.every(grow, () => w.mem.addWolf(), { owner: w });
+        battle.on('fatal', (ctx) => {
+          if (ctx.unit !== w || ctx.prevented || w.mem.wolves <= 1) return;
+          w.mem.wolves--;
+          apply();
+          ctx.prevented = true;
+          w.hp = w.s.maxHp;
+          fx(battle, 'revive', w, { wolves: w.mem.wolves });
+        }, { owner: w });
+        const mod = tal.find((t) => t && t.bb && t.bb.damage_scale != null);
+        if (mod) {
+          battle.on('hit', (ctx) => {
+            if (ctx.target === w && ctx.source && ctx.source.blockedBy === w) ctx.dmg.mul *= num(mod.bb.damage_scale, 1);
+          }, { owner: w });
+        }
+      },
+    });
+    // TAC-Y token module talent (taunt_level) of the pack — whichever kit runs it (this one or a tokens.js board piece):
+    // the enemies it blocks carry that taunt level while they stay blocked (short refreshed buff: nothing lingers when
+    // the pack or 伺夜 leaves)
+    const packTaunt = (w) => {
+      if (w.mem.packTaunt == null) {
+        const t = (w.def?.talents || []).find((x) => x && x.bb && x.bb.taunt_level != null);
+        w.mem.packTaunt = t ? num(t.bb.taunt_level) : 0;
+      }
+      return w.mem.packTaunt;
+    };
+    const installPackMark = (battle, unit) => {
+      let cur = new Set();
+      const levelOf = (w) => (w && alive(w) && alive(unit) ? packTaunt(w) : 0);
+      const mark = (e, w, lvl) => battle.addBuff(e, { key: 'token:pack_mark', duration: 0.25, refresh: 'extend', mods: { taunt: lvl }, source: w, visible: true });
+      // at once when the pack blocks (the operators attacking this tick already see it), kept / dropped every 0.1 s
+      battle.on('blocked', (ctx) => {
+        const w = wolfOf(unit), lvl = ctx.blocker === w ? levelOf(w) : 0;
+        if (lvl && ctx.enemy.alive) { mark(ctx.enemy, w, lvl); cur.add(ctx.enemy); }
+      }, { owner: unit });
+      battle.every(0.1, () => {
+        const w = wolfOf(unit);
+        const lvl = levelOf(w);
+        const next = new Set();
+        if (lvl) {
+          for (const e of w.blocking) {
+            if (!e.alive || e.side !== 'enemy' || e.blockedBy !== w) continue;
+            mark(e, w, lvl);
+            next.add(e);
+          }
+        }
+        for (const e of cur) {
+          if (next.has(e)) continue;
+          const b = e.findBuff('token:pack_mark');
+          if (b) battle.removeBuff(e, b);
+        }
+        cur = next;
+      }, { owner: unit, immediate: true });
+    };
+    /** One more “狼影” (S1): this kit's pack, or a 狼群 board piece run by content/tokens.js (same 'wolf:shadows' buff). */
+    const addShadow = (battle, vigil, w) => {
+      if (typeof w.mem.addWolf === 'function') return w.mem.addWolf();
+      const n = Math.max(1, w.mem.shadows ?? 1);
+      if (n >= maxWolves) return false;
+      const wb = w.def?.talents?.[0]?.bb ?? {};
+      const per = num(wb['vigil_wolf_t_1_enhance[trigger].block_cnt'], num(wb.block_cnt, 1));
+      w.mem.shadows = n + 1;
+      battle.addBuff(w, { key: 'wolf:shadows', persist: true, allowDead: true, refresh: 'replace', mods: { blockCnt: w.mem.shadows * per } });
+      fx(battle, 'summon', w, { src: vigil.id, wolves: w.mem.shadows });
+      return true;
+    };
+    const dpGain = (battle, unit, n) => { if (n > 0) { battle.addDp(unit.ownerId, n); fx(battle, 'dp', unit, { n }); } };
+    // S2: the pack's empowered next attack (armed by the cast; ×scale on its hits; a kill pays once)
+    const installGift = (battle, unit) => {
+      battle.on('beforeAttack', (ctx) => {
+        const w = wolfOf(unit);
+        if (!w || ctx.attacker !== w || !w.mem.vigilGift) return;
+        w.mem.vigilGiftOn = w.mem.vigilGift;
+        w.mem.vigilGift = null;
+      }, { owner: unit, priority: -100 });
+      battle.on('hit', (ctx) => {
+        const g = ctx.source?.mem?.vigilGiftOn;
+        if (g && ctx.dmg.isAttack && ctx.source === wolfOf(unit)) ctx.dmg.mul *= g.scale;
+      }, { owner: unit });
+      battle.on('kill', (ctx) => {
+        const g = ctx.killer?.mem?.vigilGiftOn;
+        if (!g || g.paid || ctx.victim.side !== 'enemy' || ctx.killer !== unit.trait.reinforcement) return;
+        g.paid = true;
+        dpGain(battle, unit, g.dp);
+      }, { owner: unit });
+      battle.on('attack', (ctx) => { if (ctx.attacker?.mem?.vigilGiftOn && ctx.attacker === unit.trait.reinforcement) ctx.attacker.mem.vigilGiftOn = null; }, { owner: unit });
+    };
+    return {
+      trait: { install(battle, unit) {
+        // The pack is the tactician's 援军. The match also hands the player the 狼群 token to place in the prep phase
+        // (= choosing the tactical point): that board piece (tokens.js kit, owner-coupled effects left to this kit) is
+        // the pack when present — deployed early on its own tile if 伺夜 deploys first — never a second pack.
+        const spawn = () => {
+          if (!alive(unit) || wolfOf(unit)) return;
+          const pieces = tokensOf(battle, unit, wolfId);
+          const live = pieces.find((t) => alive(t));
+          if (live) { unit.trait.reinforcement = live; return; }
+          const waiting = pieces.find((t) => !t.alive && !t.removed);
+          if (waiting && battle.redeploy(waiting, { free: true })) {
+            unit.trait.reinforcement = waiting;
+            fx(battle, 'summon', waiting, { src: unit.id, token: wolfId });
+            return;
+          }
+          const board = pieces.find((t) => t.uid != null);
+          const tile = tacticalPoint(battle, unit, board ? [board.homeR, board.homeC] : null);
+          if (!tile) return;
+          const w = battle.spawnToken(unit, wolfId, tile[0], tile[1], { kit: wolfKit(unit) });
+          unit.trait.reinforcement = w;
+          if (!w) return;
+          fx(battle, 'summon', w, { src: unit.id, token: wolfId, wolves: w.mem.wolves });
+          const again = Math.max(0, w.base.respawnTime || 0);
+          battle.on('death', (c) => { if (c.unit === w && c.reason === 'killed') battle.after(again, spawn, { owner: unit }); }, { owner: w });
+        };
+        battle.on('deploy', (c) => { if (c.unit === unit) spawn(); }, { owner: unit });
+        installPackMark(battle, unit);
+        battle.on('death', (c) => {
+          if (c.unit !== unit) return;
+          const w = wolfOf(unit);
+          if (w) battle.retreat(w, { reason: 'expired', permanent: true });
+        }, { owner: unit });
+      } },
+      skill: {
+        kind: 'duration',
+        attack: { hits },
+        onStart({ unit }) { unit.mem.vigilAcc = 0; unit.mem.vigilDp = 0; },
+        onTick({ battle, unit, dt }) {
+          const iv = num(bb.interval, 1.5), step = num(bb.cost, 1), cap = num(bb.value, 0);
+          if (!(iv > 0) || !(step > 0)) return; // (junk blackboard: never spin)
+          unit.mem.vigilAcc += dt;
+          while (unit.mem.vigilAcc >= iv - 1e-9 && unit.mem.vigilDp + step <= cap + 1e-9) {
+            unit.mem.vigilAcc -= iv;
+            unit.mem.vigilDp += step;
+            battle.addDp(unit.ownerId, step);
+          }
+        },
+        onEnd({ battle, unit, reason }) {
+          // the whole `value` is granted over a full duration (精锐: 11 × 1.364 s ends a hair after 15 s)
+          const rest = num(bb.value, 0) - (unit.mem.vigilDp ?? 0);
+          if (reason === 'duration' && rest > 1e-9) { battle.addDp(unit.ownerId, rest); unit.mem.vigilDp += rest; }
+          fx(battle, 'dp', unit, { n: unit.mem.vigilDp ?? 0 });
+        },
+      },
+      skills: altSkills(chess, d, bb, {
+        // (自动触发: an AUTO skill takes no 技能策略 — the 战术家 row is for MANUAL skills — and this DP skill fires as soon
+        // as it is ready, as before)
+        skchr_vigil_1: (s) => ({
+          kind: 'instant',
+          trigger: 'SP_FULL',
+          onStart({ battle, unit }) {
+            dpGain(battle, unit, num(s.bb.cost, 0));
+            const w = wolfOf(unit);
+            if (w) addShadow(battle, unit, w);
+          },
+        }),
+        skchr_vigil_2: (s) => ({
+          kind: 'instant',
+          onStart({ battle, unit }) {
+            dpGain(battle, unit, num(s.bb.cost, 0));
+            const w = wolfOf(unit);
+            if (!w) return;
+            const hr = num(s.bb['vigil_wolf_s_2.hp_ratio'], 0);
+            if (hr > 0) battle.heal(w, w, w.s.maxHp * hr, { self: true });
+            w.mem.vigilGift = { scale: num(s.bb['vigil_wolf_s_2.atk_scale'], 1), dp: num(s.bb['vigil_wolf_s_2.cost'], 0), paid: false };
+            fx(battle, 'buff', w, { src: unit.id, skill: 'vigil_2' });
+          },
+        }),
+      }),
+      install(battle, unit) { if (sel === 'skchr_vigil_2') installGift(battle, unit); },
+      talents: [
+        { install() { /* 狼群领袖: the pack itself (trait.install / wolfKit) */ } },
+        { install(battle, unit) {
+          battle.on('hit', (ctx) => {
+            const w = wolfOf(unit);
+            // "伺夜和狼群对其的攻击无视其175防御力": their attacks only (not item procs or other non-attack damage)
+            if (!w || pen <= 0 || !ctx.dmg.isAttack || (ctx.source !== unit && ctx.source !== w) || ctx.target.blockedBy !== w) return;
+            ctx.dmg.defIgnoreFlat += pen;
+          }, { owner: unit });
+          battle.on('damaged', (ctx) => {
+            const w = wolfOf(unit);
+            if (!w || !(bonus > 0) || !unit.skill?.active || !ctx.dmg?.isAttack || (ctx.source !== unit && ctx.source !== w)) return;
+            const e = ctx.target;
+            if (e.side !== 'enemy' || !e.alive || e.blockedBy !== w) return;
+            // "狼群与伺夜攻击…时，额外造成…": the extra hit belongs to that attack's dealer (a bite's bonus is the pack's
+            // damage — never re-typed by 伺夜's 弱点伤害 特质), its size to 伺夜's ATK (same as tokens.js unmanaged mode)
+            battle.dealDamage(ctx.source, e, { amount: unit.s.atk * bonus, type: 'arts', canDodge: false, isSkill: true, tags: ['skill', 'vigilBonus'] });
+          }, { owner: unit });
+        } },
+      ],
+    };
+  },
+};
@@ -0,0 +1,58 @@
+// server/sim/content/kits/ops/chess_char_3_20-kjera.js — 耶拉 (char_4013_kjera) kit, tier 3.
+// Conventions of the tier-3 kits: ../shared/tier3.js; kit contract and rules: ../README.md.
+
+import { COLS } from '../../../constants.js';
+import { num, defOf, talentBb, altSkills, statSkill, funnelMap, installFunnelPrune } from '../shared/tier3.js';
+
+export default {
+  // ---- 3_20 耶拉 · 驭械术师 — S2 心随意动: +1 drone (2 locks; a lone enemy gets both), ATK +, cold procs; 低眉: ATK +
+  //      (more with ≥cnt ground tiles in range)
+  chess_char_3_20_a: (bb, chess, def) => {
+    const d = defOf(chess, def);
+    const t0 = talentBb(d, 0);
+    const extra = Math.floor(num(bb['attack@cnt'], 0));
+    const prob = num(bb['attack@prob'], 0), cold = num(bb['attack@cold'], 0);
+    const kit = {
+      trait: { dmgMul: funnelMap },
+      skill: {
+        kind: 'duration',
+        mods: { atkPct: num(bb.atk) },
+        attack: { onHit({ battle, unit, target }) {
+          if (target && target.alive && cold > 0 && battle.rng.chance(prob)) battle.applyStatus(target, 'cold', { duration: cold, source: unit });
+        } },
+      },
+      // S1 攻击力强化·γ型: ATK + (one drone, the trait ramp as usual)
+      skills: altSkills(chess, d, bb, { 'skcom_atk_up[3]': statSkill }),
+      install(battle, unit) {
+        installFunnelPrune(battle, unit);
+        // "浮游单元+1": every drone locks an enemy — with fewer enemies in range than drones, the spare drone joins a
+        // lock (both attack it, each hit rolls the cold proc; they ramp in parallel, see funnelMap)
+        if (extra > 0) {
+          battle.on('beforeAttack', (ctx) => {
+            if (ctx.attacker !== unit || !unit.skill?.active || !ctx.targets.length) return;
+            const n = 1 + extra;
+            if (ctx.targets.length >= n) return;
+            const base = ctx.targets.slice();
+            const out = base.slice();
+            for (let i = 0; out.length < n; i++) out.push(base[i % base.length]);
+            ctx.targets = out;
+          }, { owner: unit, priority: -50 });
+        }
+      },
+      talents: [{ install(battle, unit) {
+        battle.on('deploy', (ctx) => {
+          if (ctx.unit !== unit) return;
+          let low = 0;
+          for (const k of unit.baseRangeKeys || []) {
+            const r = (k / COLS) | 0, c = k % COLS;
+            if (battle.grid.inRect(r, c) && battle.grid.isLow(r, c)) low++;
+          }
+          const atk = low >= num(t0.cnt, 2) ? num(t0['kjera_t_1[high].atk'], num(t0.atk)) : num(t0.atk);
+          battle.addBuff(unit, { key: 'talent:kjera_brow', mods: { atkPct: atk } });
+        }, { owner: unit });
+      } }],
+    };
+    if (extra > 0) kit.skill.targeting = { maxTargets: 1 + extra };
+    return kit;
+  },
+};
@@ -0,0 +1,122 @@
+// server/sim/content/kits/ops/chess_char_3_21-archet.js — 空弦 (char_332_archet) kit, tier 3.
+// Conventions of the tier-3 kits: ../shared/tier3.js; kit contract and rules: ../README.md.
+
+import { canTargetEnemy } from '../../../targeting.js';
+import { bodyDist } from '../../../body.js';
+import {
+  num, defOf, talentBb, moduleTalentBb, altSkills, instantKindOf, groundAspd, alive, fx, enemiesOn, isLeader, giveSp,
+} from '../shared/tier3.js';
+
+/** The unit's own profile damage multiplier on `target` (fastshot fly bonus …) for damage a kit deals itself. */
+function profileMul(battle, unit, target) {
+  const f = unit.profile?.dmgMul;
+  const m = typeof f === 'function' ? f(battle, unit, target) : f;
+  return typeof m === 'number' && Number.isFinite(m) ? m : 1;
+}
+/** Targetable enemies within `r` tiles of (x, y), nearest first (spawn order breaks ties), excluding `skip`. */
+function enemiesAround(battle, unit, x, y, r, skip = null) {
+  const out = battle.foesInRadius(x, y, r).filter((e) => !(skip && skip.has(e)) && canTargetEnemy(unit, e, { canHitFly: true }));
+  const d = (e) => bodyDist(e, x, y);
+  return out.sort((a, b) => d(a) - d(b) || (a.spawnSeq ?? a.id) - (b.spawnSeq ?? b.id));
+}
+/** 周围 (around a target) for 空弦's scatter / bounce arrows [ASSUMED radius, tiles: not in the data]. */
+const AROUND_R = 1.5;
+
+export default {
+  // ---- 3_21 空弦 · 速射手 — S3 箭矢·暴风: ATK +, range +1, 3 hits × 2 targets; 兰登战术: attack-SP snipers +1 SP / 2.5 s;
+  //      铁弦: one-hit shield at deployment, +7 SP when it breaks; 精锐 module MAR-Y: ASPD + with ground enemies in range
+  //      S1 箭矢·散逸: next attack ×atk_scale + up to max_target−1 other enemies around the target × atk_scale_2;
+  //      S2 箭矢·追猎 (charges): an arrow fired at once hits its target `times` times, then bounces to the nearest enemy
+  //      around not hit yet with one hit fewer each bounce (5, 4, 3, 2, 1). 精锐 MAR-X: fly × (profession layer);
+  //      ISW-A (集成战略 only): no range bonus here.
+  chess_char_3_21_a: (bb, chess, def) => {
+    const d = defOf(chess, def);
+    const t0 = talentBb(d, 0), t1 = talentBb(d, 1);
+    const mod = moduleTalentBb(chess);
+    const skill = {
+      kind: 'duration',
+      mods: { atkPct: num(bb.atk) },
+      attack: { hits: Math.max(1, Math.floor(num(bb['attack@times'], 1))) },
+    };
+    const tg = {};
+    if (num(bb.ability_range_forward_extend) > 0) tg.rangeExtend = Math.round(bb.ability_range_forward_extend);
+    if (num(bb['attack@max_target']) > 1) tg.maxTargets = Math.floor(bb['attack@max_target']);
+    if (Object.keys(tg).length) skill.targeting = tg;
+    const physHit = (battle, unit, e, scale, tag) => battle.dealDamage(unit, e, { amount: unit.s.atk * scale * profileMul(battle, unit, e), type: 'phys', isSkill: true, tags: ['skill', tag] });
+    const kit = {
+      skill,
+      skills: altSkills(chess, d, bb, {
+        skchr_archet_1: (s) => {
+          const more = Math.max(0, Math.floor(num(s.bb.max_target, 4)) - 1);
+          const sc2 = num(s.bb.atk_scale_2, 1);
+          return {
+            kind: instantKindOf(s),
+            attack: {
+              atkScale: num(s.bb.atk_scale, 1),
+              onHit({ battle, unit, target, x, y }) {
+                const cx = target ? target.x : x, cy = target ? target.y : y;
+                if (!Number.isFinite(cx) || !Number.isFinite(cy) || !(more > 0)) return;
+                const others = enemiesAround(battle, unit, cx, cy, AROUND_R, new Set([target])).slice(0, more);
+                for (const e of others) physHit(battle, unit, e, sc2, 'archetScatter');
+                if (others.length) fx(battle, 'volley', unit, { targets: others.map((e) => e.id), skill: 'archet_1' });
+              },
+            },
+          };
+        },
+        skchr_archet_2: (s) => {
+          const times = Math.max(1, Math.floor(num(s.bb.times, 5)));
+          const sc = num(s.bb.atk_scale, 1);
+          return {
+            kind: instantKindOf(s),
+            onStart({ battle, unit }) {
+              const first = enemiesOn(battle, unit, unit.rangeKeys, 1, unit.profile)[0];
+              if (!first) return;
+              const seen = new Set();
+              const fire = (from, target, n) => {
+                seen.add(target);
+                battle.addProjectile({
+                  from, target, speed: 16, visual: 'arrow', source: unit, hitDead: true,
+                  onHit: ({ target: t, x, y }) => {
+                    if (t && t.alive) for (let i = 0; i < n && t.alive; i++) physHit(battle, unit, t, sc, 'archetPursuit');
+                    if (n <= 1) return;
+                    const next = enemiesAround(battle, unit, x, y, AROUND_R, seen)[0];
+                    if (next) fire({ x, y }, next, n - 1);
+                  },
+                });
+              };
+              fire(unit, first, times);
+              fx(battle, 'volley', unit, { target: first.id, skill: 'archet_2' });
+            },
+          };
+        },
+      }),
+      talents: [
+        { install(battle, unit) { // 兰登战术
+          unit.mem.archetTactics = true;
+          battle.every(num(t0.interval, 2.5), () => {
+            if (!alive(unit) || !isLeader(battle, unit, 'archetTactics')) return;
+            for (const a of battle.allies(unit.ownerId)) {
+              if (a.kind === 'op' && a.def?.profession === 'SNIPER' && a.skill?.spType === 'attack') giveSp(a, num(t0.sp, 1), 'talent');
+            }
+          }, { owner: unit });
+        } },
+        { install(battle, unit) { // 铁弦
+          battle.on('deploy', (ctx) => {
+            if (ctx.unit !== unit) return;
+            battle.addBuff(unit, {
+              key: 'talent:archet_shield', shieldHits: 1, visible: true,
+              onRemove: ({ unit: u, buff }) => {
+                if (buff.shieldHits > 0 || !u.alive) return;
+                giveSp(u, num(t1.sp), 'talent');
+                fx(battle, 'shieldBreak', u);
+              },
+            });
+            fx(battle, 'shield', unit);
+          }, { owner: unit });
+        } },
+      ],
+    };
+    if (mod && num(mod.attack_speed) > 0) kit.install = groundAspd('trait:archet_ground', num(mod.attack_speed));
+    return kit;
+  },
+};
@@ -0,0 +1,144 @@
+// server/sim/content/kits/ops/chess_char_4_01-rmixer.js — 信仰搅拌机 (char_4194_rmixer) kit, tier 4.
+// Conventions of the tier-4 kits: ../shared/tier4.js; kit contract and rules: ../README.md.
+
+import { isHpLoss } from '../../../damage.js';
+import { holdsUndying } from '../../items/battle.js';
+import {
+  AURA, num, tbb, grid, nationOf, enemiesOnRange, targetsInRange, whileDeployed, reveal, skillActive, isSel, alt,
+  instantKind, withDefaults,
+} from '../shared/tier4.js';
+
+/** Is module `id` the active one? (elites; `'none'` / normal chess ⇒ false) */
+const moduleIs = (def, id) => !!(def?.raw?.module?.active && def.raw.module.id === id);
+/**
+ * Permanent forward range extension (攻击距离 +n): every range, skill ranges included — except a skill whose range ignores
+ * 攻击距离 (`targeting.noRangeExtend`). SPT-Y's "攻击距离+1（不受技能攻击范围变化影响）" reads, as PRTS 修正 it, "（部分技能不受
+ * 此影响）" (原因: 语序颠倒、表述模糊) — 信仰搅拌机 S3 备注 "此技能的攻击范围不受'攻击距离'属性影响".
+ */
+const rangeUp = (battle, unit, n = 1) => battle.addBuff(unit, { key: 'module:range', mods: { rangeExtend: n }, persist: true, allowDead: true });
+
+export default withDefaults({
+  // ===== 信仰搅拌机 (shotprotector) S3 退休前布道 — ammo 30 counters; talents 扫射迎宾仪礼 / 架盾送客仪礼; module: reveal
+  //       S1 铳骑主考官 (自动触发 ⇒ DEFAULT: next attack ×3 hits + reload an adjacent 拉特兰 ammo skill), S2 八臂电锯侠 (ammo;
+  //       a fatal hit is blocked for `ammo_cost` bullets); module SPT-Y 老朋友: range +1 (not on S3's range, PRTS 备注)
+  chess_char_4_01_a: (bb, chess, def) => {
+    const t0 = tbb(def, 0), t1 = tbb(def, 1);
+    const counterMax = Math.max(1, Math.floor(num(bb['attack@max_target'], 3)));
+    const counterRatio = num(bb.base_attack_time, 0.6); // 反击最小间隔 = 实际攻击间隔 × ratio (not a BAT change)
+    const g = grid(def.skill?.rangeGrid);
+    const S2 = isSel(def, 'skchr_rmixer_2'), S3 = isSel(def, 'skchr_rmixer_3');
+    return {
+      skills: alt(def, {
+        // 铳骑主考官: the next attack is a triple hit of atk_scale each and reloads `charge` bullet(s) into ONE other
+        // 拉特兰 operator around him (8 tiles, [ASSUMED] nearest first) whose ammo skill runs
+        skchr_rmixer_1: () => ({
+          kind: instantKind(def),
+          attack: {
+            atkScale: num(bb.atk_scale, 1.3), hits: 3,
+            onHit({ battle, unit }) {
+              const n = num(bb.charge, 1);
+              const cand = battle.alliesInRadius(unit.x, unit.y, 1.5, unit.ownerId)
+                .filter((a) => a !== unit && a.kind === 'op' && nationOf(a) === 'laterano' && a.skill && a.skill.active && a.skill.kind === 'ammo')
+                .sort((a, b) => Math.hypot(a.x - unit.x, a.y - unit.y) - Math.hypot(b.x - unit.x, b.y - unit.y) || a.id - b.id);
+              if (!cand[0] || !(n > 0)) return;
+              cand[0].skill.addAmmo(n);
+              battle.fx('reload', { x: cand[0].x, y: cand[0].y, id: cand[0].id, n });
+            },
+          },
+        }),
+        // 八臂电锯侠: ATK/DEF up, 42/45 bullets; the fatal-hit guard is installed below
+        skchr_rmixer_2: () => ({
+          kind: 'ammo', ammo: num(bb['attack@trigger_time'], 42),
+          mods: { atkPct: num(bb.atk), defPct: num(bb.def) },
+          onStart({ battle, unit }) { battle.fx('overload', { x: unit.x, y: unit.y, id: unit.id }); },
+        }),
+      }),
+      skill: {
+        kind: 'ammo', ammo: num(bb['attack@trigger_time'], 30),
+        mods: { hpPct: num(bb.max_hp), atkPct: num(bb.atk), defPct: num(bb.def) },
+        // 3-13 exactly: SPT-Y's 攻击距离+1 does not reach it (PRTS 备注; reviewer of community report E1 after 0.1.0)
+        targeting: g ? { rangeGrid: g, noRangeExtend: true } : undefined,
+        attack: { noAttack: true },                 // 停止主动攻击敌人 (ammo is spent by counters)
+        onStart({ battle, unit }) {
+          unit.mem.counterReady = -Infinity;
+          for (const a of battle.allies(unit.ownerId)) {
+            if (a === unit || a.kind !== 'op' || nationOf(a) !== 'laterano') continue;
+            if (a.skill && a.skill.active && a.skill.kind === 'ammo') { a.skill.addAmmo(num(bb.ammo, 0)); battle.fx('reload', { x: a.x, y: a.y, id: a.id, n: num(bb.ammo, 0) }); }
+          }
+          battle.fx('sermon', { x: unit.x, y: unit.y, id: unit.id });
+        },
+      },
+      talents: [
+        { install(battle, unit) { // 扫射迎宾仪礼: every damage dealt → DEF +30 / ASPD +3 for 10 s, ≤ 3 stacks
+          battle.on('damaged', (c) => {
+            if (c.source !== unit || !unit.alive || c.target.side !== 'enemy' || !(c.amount > 0)) return;
+            battle.addBuff(unit, { key: 'rmixer:t1', duration: num(t0.duration, 10), refresh: 'stack', maxStacks: Math.max(1, num(t0.max_stack_cnt, 3)),
+              mods: { defFlat: num(t0.def), aspd: num(t0.attack_speed) } });
+          }, { owner: unit });
+        } },
+        { install(battle, unit) { // 架盾送客仪礼: no active attack for 8 s → shield 15 % max HP; timer restarts when it breaks
+          const since = () => Math.max(unit.deployedAt, unit.mem.lastActiveAtk ?? -Infinity, unit.mem.shieldLostAt ?? -Infinity);
+          battle.on('attack', (c) => { if (c.attacker === unit && !unit.mem.inCounter) unit.mem.lastActiveAtk = battle.time; }, { owner: unit });
+          battle.on('deploy', (c) => { if (c.unit === unit) { unit.mem.lastActiveAtk = -Infinity; unit.mem.shieldLostAt = -Infinity; } }, { owner: unit });
+          whileDeployed(battle, unit, 0.1, () => {
+            if (unit.findBuff('rmixer:shield') || battle.time - since() < num(t1.interval, 8) - 1e-9) return;
+            battle.addBuff(unit, { key: 'rmixer:shield', shield: unit.s.maxHp * num(t1.shield, 0.15), visible: true,
+              onRemove: () => { unit.mem.shieldLostAt = battle.time; } });
+            battle.fx('shield', { x: unit.x, y: unit.y, id: unit.id });
+          });
+        } },
+      ],
+      install(battle, unit) {
+        if (S2) {
+          // S2 "技能期间若受到致命伤害，立即消耗N发弹药抵挡这次伤害": the lethal hit is negated (HP back to its value
+          // before the hit) and N bullets go; with fewer left it still blocks, spends them all and the skill ends (PRTS 备注
+          // "弹药量不足时仍可抵挡致命伤害，此时将消耗所有剩余弹药并退出技能状态"). "自身持有不死时此效果不会生效": a 不死
+          // that runs before it (骑士戒律, priority 20) has already prevented the hit; 坚固维式重锤's held window
+          // (items/battle.js holdsUndying: this deployment's, not run out) runs last, so the guard steps aside while it lasts
+          const cost = Math.max(1, Math.floor(num(bb.ammo_cost, 30)));
+          battle.on('hit', (c) => { if (c.target === unit) unit.mem.rmixerPre = { dmg: c.dmg, hp: unit.hp }; }, { owner: unit, priority: -100 });
+          battle.on('fatal', (c) => {
+            const sk = unit.skill;
+            if (c.unit !== unit || c.prevented || !sk || !sk.active || sk.kind !== 'ammo' || !(sk.ammoLeft > 0)) return;
+            if (holdsUndying(battle, unit)) return;
+            c.prevented = true;
+            const pre = unit.mem.rmixerPre;
+            unit.hp = pre && pre.dmg === c.dmg ? Math.max(1, Math.min(unit.s.maxHp, pre.hp)) : 1;
+            const spent = Math.min(cost, sk.ammoLeft);
+            sk.ammoLeft -= spent;
+            battle.fx('shield', { x: unit.x, y: unit.y, id: unit.id, n: spent });
+            if (sk.ammoLeft <= 0) sk.end('ammo');
+          }, { owner: unit });
+        }
+        // module SPT-Y (elite, 老朋友): 攻击距离+1 — S1 / S2 keep it, S3's 3-13 does not (noRangeExtend above)
+        if (num(def.traitBb?.ability_range_forward_extend, 0) > 0) rangeUp(battle, unit, num(def.traitBb.ability_range_forward_extend, 1));
+        // module SPT-X (elite default): 攻击范围内敌人的隐匿效果失效
+        if (moduleIs(def, 'uniequip_002_rmixer')) whileDeployed(battle, unit, AURA, () => reveal(battle, enemiesOnRange(battle, unit)));
+        if (!S3) return;
+        // S3 counter (PRTS 备注 "反击受到任何伤害后均可触发，无需目标，视为普通攻击，受各类无法触发普通攻击效果的影响"): ANY damage
+        // she takes — an enemy's attack, a zone, the 无来源 源石溶剂 tick (items/battle.js periodic_damage) — fires one volley at
+        // ≤ 3 enemies in range (the attacker first), at most once per actual interval × ratio. With no enemy in range the
+        // counter still happens and spends its bullet (无需目标: the drain alone empties the skill — 莫斯提马's 特质 turns those
+        // bullets into 拉特兰 layers, player report D1). A 流失 (Battle.loseHp, tag 'hpLoss': it skips every damage event —
+        // PRTS 作战机制) and an element 损伤 never counter; stunned / disarmed: no counter
+        battle.on('damaged', (c) => {
+          const d = c.dmg;
+          if (c.target !== unit || !unit.canAct || unit.s.flags.disarm || !skillActive(unit) || !d || c.type === 'element') return;
+          if (isHpLoss(d)) return;
+          if (battle.time < (unit.mem.counterReady ?? -Infinity) - 1e-9) return;
+          const list = targetsInRange(battle, unit);
+          const i = c.source ? list.indexOf(c.source) : -1;
+          if (i > 0) { list.splice(i, 1); list.unshift(c.source); }
+          const targets = list.slice(0, counterMax);
+          unit.mem.counterReady = battle.time + unit.s.interval * counterRatio;
+          unit.mem.inCounter = true;
+          try {
+            if (targets.length) battle.forceAttack(unit, targets);
+            else { unit.stats.attacks++; unit.skill.onAttackPerformed([], true); } // a counter into nothing: its bullet goes
+          } finally { unit.mem.inCounter = false; }
+          battle.fx('counter', { x: unit.x, y: unit.y, id: unit.id, n: targets.length });
+        }, { owner: unit });
+      },
+    };
+  },
+});
@@ -0,0 +1,75 @@
+// server/sim/content/kits/ops/chess_char_4_02-mostma.js — 莫斯提马 (char_213_mostma) kit, tier 4.
+// Conventions of the tier-4 kits: ../shared/tier4.js; kit contract and rules: ../README.md.
+
+import {
+  AURA, num, tbb, grid, enemiesOnRange, whileDeployed, pulse, spAura, skillActive, isSel, alt, applyModuleRange,
+  withDefaults,
+} from '../shared/tier4.js';
+
+const TICK_EPS = 0.01;     // minimal status duration (s)
+/**
+ * Knock-back of 力度 `force` away from `from` (a radial push, Battle.push: the official 力度 − 重量 distance — PRTS 推与拉;
+ * user playtest #6 item 14). Returns the tiles moved.
+ */
+function shove(battle, e, from, force) {
+  return e && e.alive ? battle.push(e, num(force, 0), { from }) : 0;
+}
+
+export default withDefaults({
+  // ===== 莫斯提马 (splashcaster) S3 序时之匙 — ripple hits all in range, +ATK, talent 2 ×3, small knock-back
+  //       S1 攻击力强化·γ型; S2 荒时之锁 (every enemy in range stunned for the rest of the skill, 100 %/120 % ATK arts
+  //       per second); module SPC-X (资深万国信使定制斗篷): 攻击范围扩大
+  chess_char_4_02_a: (bb, chess, def) => {
+    const t0 = tbb(def, 0), t1 = tbb(def, 1);
+    const g = grid(def.skill?.rangeGrid);
+    const force = num(bb['attack@force'], num(bb.force, 0));
+    const S3 = isSel(def, 'skchr_mostma_3');
+    return {
+      skills: alt(def, {
+        'skcom_atk_up[3]': () => ({ kind: 'duration', mods: { atkPct: num(bb.atk) } }),
+        skchr_mostma_2: () => ({
+          kind: 'duration',
+          onStart({ battle, unit, skill }) {
+            unit.mem.timeLock = { acc: 0, locked: new Set() };
+            battle.fx('zone', { x: unit.x, y: unit.y, id: unit.id, duration: skill.duration });
+          },
+          onTick({ battle, unit, skill, dt }) {
+            const L = unit.mem.timeLock;
+            if (!L) return;
+            // every enemy standing in her range (entering later too) is stunned until the skill ends
+            for (const e of enemiesOnRange(battle, unit)) {
+              if (L.locked.has(e.id)) continue;
+              L.locked.add(e.id);
+              battle.applyStatus(e, 'stun', { duration: Math.max(TICK_EPS, skill.timeLeft), source: unit });
+            }
+            L.acc += dt;
+            while (L.acc + 1e-9 >= 1) {
+              L.acc -= 1;
+              for (const e of enemiesOnRange(battle, unit)) {
+                battle.dealDamage(unit, e, { amount: unit.s.atk * num(bb.atk_scale, 1), type: 'arts', isSkill: true, tags: ['skill', 'timeLock'] });
+              }
+            }
+          },
+          onEnd({ unit }) { unit.mem.timeLock = null; },
+        }),
+      }),
+      install(battle, unit) { applyModuleRange(battle, unit, def); }, // module SPC-X: 攻击范围扩大 (module range grid)
+      skill: {
+        kind: 'duration',
+        mods: { atkPct: num(bb.atk) },
+        targeting: { ...(g ? { rangeGrid: g } : {}), allInRange: true },
+        attack: { projectile: 'none', splashRadius: 0, onHit({ battle, unit, target }) { if (target && target.alive) shove(battle, target, unit, force); } },
+        onAttack({ battle, unit }) { battle.fx('ripple', { x: unit.x, y: unit.y, id: unit.id }); },
+      },
+      talents: [
+        { install(battle, unit) { spAura(battle, unit, num(t0.sp_recovery_per_sec, 0.4), (a) => a.def?.profession === 'CASTER'); } },
+        { install(battle, unit) { // 主观缓时: enemies in range −15 % move speed (×talent_scale during S3)
+          whileDeployed(battle, unit, AURA, () => {
+            const v = num(t1.move_speed, -0.15) * (S3 && skillActive(unit) ? num(bb.talent_scale, 3) : 1);
+            for (const e of enemiesOnRange(battle, unit)) pulse(battle, e, `mostma:slow:${unit.id}`, { moveMul: Math.max(0, 1 + v) }, { status: 'slow', visible: true });
+          });
+        } },
+      ],
+    };
+  },
+});
@@ -0,0 +1,77 @@
+// server/sim/content/kits/ops/chess_char_4_03-kjera.js — 耶拉 (char_4013_kjera) kit, tier 4 (hidden).
+// Conventions of the tier-4 kits: ../shared/tier4.js; kit contract and rules: ../README.md.
+
+import { COLS } from '../../../constants.js';
+import { canTargetEnemy } from '../../../targeting.js';
+import { num, tbb, skillActive, withDefaults } from '../shared/tier4.js';
+
+export default withDefaults({
+  // ===== 耶拉 (funnel, hidden) S2 心随意动 — +1 drone locking targets, ATK up, chance to chill; talent 低眉
+  chess_char_4_03_a: (bb, chess, def) => {
+    const t0 = tbb(def, 0);
+    const n = 1 + Math.max(0, Math.floor(num(bb['attack@cnt'], 1)));
+    const prob = num(bb['attack@prob'], 0), cold = num(bb['attack@cold'], 0);
+    const funnel = (unit) => unit.profile.funnel || { init: 0.2, delta: 0.15, max: 1.1 };
+    return {
+      skill: {
+        kind: 'duration',
+        mods: { atkPct: num(bb.atk) },
+        targeting: { maxTargets: n },
+        attack: {
+          // every drone ramps on its own locked target (trait init/delta/max): the multipliers are queued per target
+          // by the beforeAttack hook below (two drones on the same enemy ramp independently)
+          dmgMul: (battle, unit, target) => {
+            const q = unit.mem.kjeraQueue && unit.mem.kjeraQueue.get(target.id);
+            return q && q.length ? q.shift() : funnel(unit).init;
+          },
+          onHit({ battle, unit, target }) {
+            if (target && target.alive && cold > 0 && battle.rng.chance(prob)) battle.applyStatus(target, 'cold', { duration: cold, source: unit });
+          },
+        },
+        onStart({ battle, unit }) { unit.mem.kjeraDrones = []; unit.mem.kjeraQueue = new Map(); battle.fx('drones', { x: unit.x, y: unit.y, id: unit.id, n }); },
+        onEnd({ unit }) { unit.mem.kjeraDrones = []; unit.mem.kjeraQueue = null; },
+      },
+      talents: [{ install(battle, unit) { // 低眉: ATK +10 %, +16 % with ≥ 2 ground tiles in range
+        battle.on('deploy', (c) => {
+          if (c.unit !== unit) return;
+          let low = 0;
+          for (const k of unit.rangeKeys || []) if (battle.grid.isLow((k / COLS) | 0, k % COLS)) low++;
+          const v = low >= num(t0.cnt, 2) ? num(t0['kjera_t_1[high].atk'], num(t0.atk)) : num(t0.atk);
+          battle.addBuff(unit, { key: 'kjera:t1', mods: { atkPct: v } });
+        }, { owner: unit });
+      } }],
+      install(battle, unit) {
+        // n drones, each locked on its enemy until that enemy dies (while at least one enemy is in her range). A free
+        // drone takes an enemy no other drone holds, else doubles up on the best target (a lone enemy/boss gets both).
+        battle.on('beforeAttack', (c) => {
+          if (c.attacker !== unit || !skillActive(unit)) return;
+          const ok = (e) => !!e && e.alive && canTargetEnemy(unit, e, { canHitFly: true });
+          const cands = c.targets.filter(ok);
+          const drones = unit.mem.kjeraDrones || (unit.mem.kjeraDrones = []);
+          const held = new Set();
+          for (let i = 0; i < n; i++) { if (drones[i] && ok(drones[i].e)) held.add(drones[i].e); else drones[i] = null; }
+          for (let i = 0; i < n; i++) {
+            if (drones[i]) continue;
+            const e = cands.find((x) => !held.has(x)) ?? cands[0] ?? drones.find((d) => d)?.e;
+            if (!e) continue;
+            held.add(e);
+            drones[i] = { e, scale: null };
+          }
+          const f = funnel(unit);
+          const q = unit.mem.kjeraQueue || (unit.mem.kjeraQueue = new Map());
+          const out = [];
+          for (const d of drones) {
+            if (!d) continue;
+            d.scale = d.scale == null ? f.init : Math.min(f.max, d.scale + f.delta);
+            out.push(d.e);
+            const l = q.get(d.e.id);
+            if (l) l.push(d.scale); else q.set(d.e.id, [d.scale]);
+          }
+          if (out.length) c.targets = out;
+        }, { owner: unit, priority: 10 });
+        // queued multipliers of shots that never landed (target died mid-flight) are dropped with the target
+        battle.on('death', (c) => { if (c.unit.side === 'enemy' && unit.mem.kjeraQueue) unit.mem.kjeraQueue.delete(c.unit.id); }, { owner: unit });
+      },
+    };
+  },
+});
@@ -0,0 +1,168 @@
+// server/sim/content/kits/ops/chess_char_4_04-ines.js — 伊内丝 (char_4087_ines) kit, tier 4.
+// Conventions of the tier-4 kits: ../shared/tier4.js; kit contract and rules: ../README.md.
+
+import { bodyDist } from '../../../body.js';
+import { canTargetEnemy } from '../../../targeting.js';
+import { AURA, num, tbb, grid, enemiesOnRange, pulse, isSel, alt, instantKind, withDefaults } from '../shared/tier4.js';
+
+export default withDefaults({
+  // ===== 伊内丝 (agent) S2 暗夜无明 — stealth, +ATK, +1 DP & steal ASPD per attack; talents 影织 / 影哨
+  //       S1 淬影突袭 (next attack: 3 s arts DoT 40 %/55 % ATK per s, not stacking, +2 DP); S3 独影归途 (passive: the
+  //       first deployment leaves a 影哨 and retreats with the redeploy timer refreshed; every deployment: ATK up for
+  //       the skill duration, the sentry is recalled through ≤ 4/5 enemies for 110 %/140 % phys, +1 DP per damage)
+  chess_char_4_04_a: (bb, chess, def) => {
+    const t0 = tbb(def, 0), t1 = tbb(def, 1);
+    const tb = def.traitBb || {};
+    const g = grid(def.skill?.rangeGrid);
+    const step = num(bb['attack@steal_atk_speed'], 5), maxSteal = num(bb['attack@steal_atk_speed_max'], 50);
+    const S3 = isSel(def, 'skchr_ines_3');
+    const clearAspd = (battle, unit) => {
+      for (const id of unit.mem.inesAspdVictims || []) { const e = battle.unitById(id); if (e) battle.removeBuff(e, `ines:aspd:${unit.id}`); }
+      unit.mem.inesAspdVictims = [];
+      unit.mem.inesAspd = 0;
+      battle.removeBuff(unit, 'ines:aspdGain');
+    };
+    const s3Dur = num(def.skill?.duration, 11);
+    return {
+      skills: alt(def, {
+        skchr_ines_1: () => ({
+          kind: instantKind(def),
+          attack: {
+            onHit({ battle, unit, target }) {
+              battle.addDp(unit.ownerId, num(bb.cost, 2));
+              if (!target || !target.alive || target.side !== 'enemy') return;
+              const scale = num(bb.bleed_atk_scale, 0.4);
+              // （不叠加）: a new DoT replaces the running one
+              battle.addBuff(target, { key: `ines:bleed:${unit.id}`, duration: num(bb.bleed_duration, 3) + 1e-6, interval: 1, source: unit, visible: true, refresh: 'extend',
+                onTick: ({ unit: t }) => battle.dealDamage(unit, t, { amount: unit.s.atk * scale, type: 'arts', isSkill: true, tags: ['skill', 'dot'] }) });
+            },
+          },
+        }),
+        skchr_ines_3: () => ({
+          kind: 'passive',
+          onStart({ battle, unit }) {
+            if (!unit.mem.inesS3Placed) {
+              // 首次部署: place a 影哨 (her talent's sentry, left on retreat) and leave; 立刻刷新再部署时间 — the redeploy
+              // (auto, paying her DP cost like every redeploy) follows as soon as it is affordable
+              unit.mem.inesS3Placed = true;
+              battle.after(0, () => {
+                if (!unit.alive || !unit.deployed) return;
+                battle.retreat(unit, { reason: 'retreat' });
+                unit.respawnAt = battle.time;
+                battle.fx('sentry', { x: unit.x, y: unit.y, id: unit.id });
+              }, { owner: unit });
+              return;
+            }
+            battle.addBuff(unit, { key: 'ines:s3', duration: s3Dur, mods: { atkPct: num(bb.atk) }, visible: true });
+            // 立刻收回影哨: the sentry flies back to her and hits ≤ max_target enemies on its way (within
+            // projectile_range of the segment, [ASSUMED] nearest to its start first)
+            const from = unit.mem.inesSentryAt;
+            if (!unit.mem.sentry || !from) return;
+            unit.mem.sentry = null;
+            unit.mem.inesSentryAt = null;
+            const ax = from.x, ay = from.y, bx = unit.x, by = unit.y;
+            const L2 = (bx - ax) ** 2 + (by - ay) ** 2;
+            const w = num(bb.projectile_range, 1.4);
+            const hits = [];
+            for (const e of battle.aliveEnemies()) {
+              if (!canTargetEnemy(unit, e, { canHitFly: true })) continue;
+              const t = L2 > 1e-9 ? Math.max(0, Math.min(1, ((e.x - ax) * (bx - ax) + (e.y - ay) * (by - ay)) / L2)) : 0;
+              const d = bodyDist(e, ax + t * (bx - ax), ay + t * (by - ay));
+              if (d <= w + 1e-9) hits.push({ e, t, d });
+            }
+            hits.sort((a, b) => a.t - b.t || a.d - b.d || a.e.id - b.e.id);
+            const amount = unit.s.atk * num(bb.atk_scale, 1.1); // one projectile: ATK taken when it flies back
+            for (const { e } of hits.slice(0, Math.max(1, Math.floor(num(bb.max_target, 4))))) {
+              battle.dealDamage(unit, e, { amount, type: 'phys', isSkill: true, tags: ['skill', 'sentryRecall'] });
+            }
+            battle.fx('beam', { x: ax, y: ay, tx: bx, ty: by, id: unit.id });
+          },
+        }),
+      }),
+      skill: {
+        kind: 'duration',
+        mods: { atkPct: num(bb.atk) },
+        flags: { stealth: true },
+        targeting: g ? { rangeGrid: g } : undefined,
+        onStart({ battle, unit }) { clearAspd(battle, unit); battle.fx('stealth', { x: unit.x, y: unit.y, id: unit.id }); },
+        onAttack({ battle, unit }) { battle.addDp(unit.ownerId, num(bb.cost, 1)); },
+        onHit({ battle, unit, target }) {
+          if (!target || !target.alive || target.side !== 'enemy') return;
+          const room = maxSteal - (unit.mem.inesAspd ?? 0);
+          if (room <= 0) return;
+          const s = Math.min(step, room);
+          unit.mem.inesAspd = (unit.mem.inesAspd ?? 0) + s;
+          const key = `ines:aspd:${unit.id}`;
+          const cur = target.findBuff(key);
+          battle.addBuff(target, { key, mods: { aspd: (cur?.mods?.aspd ?? 0) - s }, source: unit });
+          if (!(unit.mem.inesAspdVictims ||= []).includes(target.id)) unit.mem.inesAspdVictims.push(target.id);
+          battle.addBuff(unit, { key: 'ines:aspdGain', mods: { aspd: unit.mem.inesAspd } });
+        },
+        onEnd({ battle, unit }) { clearAspd(battle, unit); },
+      },
+      talents: [
+        { install(battle, unit) { // 影织: first damage on each enemy → bind 5 s + steal 90 ATK until it dies or Ines leaves
+          unit.mem.woven = new Set();
+          unit.mem.atkVictims = [];
+          const refresh = () => {
+            unit.mem.atkVictims = unit.mem.atkVictims.filter((id) => battle.unitById(id)?.alive);
+            const gain = Math.min(num(t0.steal_atk_max, Infinity), num(t0.steal_atk, 90) * unit.mem.atkVictims.length);
+            if (unit.alive) { if (gain > 0) battle.addBuff(unit, { key: 'ines:atkGain', mods: { atkFlat: gain } }); else battle.removeBuff(unit, 'ines:atkGain'); }
+          };
+          battle.on('damaged', (c) => {
+            const e = c.target;
+            if (c.source !== unit || !unit.alive || e.side !== 'enemy' || c.type === 'element' || unit.mem.woven.has(e.id)) return;
+            unit.mem.woven.add(e.id);
+            if (!e.alive) return;
+            battle.applyStatus(e, 'bind', { duration: num(t0.duration, 5), source: unit });
+            battle.addBuff(e, { key: `ines:atkSteal:${unit.id}`, mods: { atkFlat: -num(t0.steal_atk, 90) }, source: unit });
+            unit.mem.atkVictims.push(e.id);
+            refresh();
+            battle.fx('shadowWeave', { x: e.x, y: e.y, id: e.id });
+          }, { owner: unit });
+          battle.on('death', (c) => {
+            if (c.unit.side === 'enemy' && unit.mem.atkVictims.includes(c.unit.id)) refresh();
+            if (c.unit !== unit) return;
+            for (const id of unit.mem.atkVictims) { const e = battle.unitById(id); if (e) battle.removeBuff(e, `ines:atkSteal:${unit.id}`); }
+            unit.mem.atkVictims = [];
+            unit.mem.woven = new Set();
+          }, { owner: unit });
+        } },
+        { install(battle, unit) { // 影哨: reveal + −30 % move speed in range; a sentry keeps it after she leaves (max 1)
+          const mods = { moveMul: Math.max(0, 1 + num(t1.move_speed, -0.3)) };
+          battle.on('death', (c) => {
+            if (c.unit !== unit || c.reason === 'expired') return;
+            unit.mem.sentry = new Set(unit.baseRangeKeys || unit.rangeKeys || []);
+            battle.fx('sentry', { x: unit.x, y: unit.y, id: unit.id });
+          }, { owner: unit });
+          battle.every(AURA, () => {
+            const set = new Set();
+            if (unit.alive && unit.deployed) for (const k of unit.rangeKeys || []) set.add(k);
+            if (unit.mem.sentry) for (const k of unit.mem.sentry) set.add(k);
+            if (!set.size) return;
+            for (const e of enemiesOnRange(battle, unit, set)) pulse(battle, e, `ines:sentry:${unit.id}`, mods, { flags: { reveal: true } });
+          }, { owner: unit });
+        } },
+      ],
+      install(battle, unit) {
+        if (S3) {
+          // where the talent's 影哨 stays (every leave but an expiry), for the recall of the next deployment
+          battle.on('death', (c) => { if (c.unit === unit && c.reason !== 'expired') unit.mem.inesSentryAt = { x: unit.x, y: unit.y }; }, { owner: unit, priority: 5 });
+          // 技能期间每对一个敌人造成伤害就获得1点部署费用
+          battle.on('damaged', (c) => {
+            if (c.source !== unit || c.target.side !== 'enemy' || !(c.amount > 0) || c.type === 'element' || !unit.findBuff('ines:s3')) return;
+            battle.addDp(unit.ownerId, num(bb.cost, 1));
+          }, { owner: unit });
+        }
+        // module (elite): the first retreat's redeploy time is 35 % shorter
+        const rt = num(tb.respawn_time, 0);
+        if (!rt) return;
+        battle.on('death', (c) => {
+          if (c.unit !== unit || unit.mem.firstRetreatDone || !Number.isFinite(unit.respawnAt)) return;
+          unit.mem.firstRetreatDone = true;
+          unit.respawnAt = unit.deathAt + (unit.respawnAt - unit.deathAt) * Math.max(0, 1 + rt);
+        }, { owner: unit });
+      },
+    };
+  },
+});
@@ -0,0 +1,66 @@
+// server/sim/content/kits/ops/chess_char_4_05-beewax.js — 蜜蜡 (char_344_beewax) kit, tier 4 (hidden).
+// Conventions of the tier-4 kits: ../shared/tier4.js; kit contract and rules: ../README.md.
+
+import { COLS } from '../../../constants.js';
+import {
+  num, tbb, grid, targetsInRange, targetsInGrid, toggleBuff, skillActive, withDefaults,
+} from '../shared/tier4.js';
+
+/**
+ * Free tile for a summon/device: in the rect, standable, not reserved (Battle.isReservedTile: empty, no knocked-out
+ * operator lying there) and not the home tile of any ally (dead ones redeploy there).
+ */
+function freeTile(battle, r, c, { ranged = false, ground = false } = {}) {
+  if (!Number.isInteger(r) || !Number.isInteger(c) || !battle.grid.inRect(r, c)) return false;
+  if (battle.isReservedTile(r, c)) return false;
+  if (!battle.grid.canStand(r, c, { ranged })) return false;
+  if (ground && !battle.grid.groundPassable(r, c)) return false;
+  for (const u of battle.allyUnits) if (!u.removed && u.homeR === r && u.homeC === c && u.kind !== 'device') return false;
+  return true;
+}
+
+export default withDefaults({
+  // ===== 蜜蜡 (phalanx, hidden) S2 守卫尖碑 — obelisk on a melee tile in range: 200 % arts burst + stun, blocks 3
+  chess_char_4_05_a: (bb, chess, def) => {
+    const t0 = tbb(def, 0);
+    const tb = def.traitBb || {};
+    const tokenId = def.raw?.skill?.overrideTokenKey ?? (def.tokens || [])[0] ?? 'token_10011_beewax_oblisk';
+    const keepDef = num(tb['soil_e_002[buff].def'], 0), keepRes = num(tb['soil_e_002[buff].magic_resistance'], 0);
+    const obeliskKit = { skill: null, talents: [], trait: { noAttack: true } };
+    return {
+      skill: {
+        kind: 'duration',
+        onStart({ battle, unit }) {
+          if (keepDef || keepRes) battle.addBuff(unit, { key: 'beewax:keep', mods: { defPct: keepDef, resFlat: keepRes } });
+          // melee deploy tile in range: nearest to the most advanced enemy (path tile first)
+          const foes = targetsInRange(battle, unit);
+          const ref = foes[0] || battle.aliveEnemies().filter((e) => !e.hidden).sort((a, b) => battle.remainingDistance(a) - battle.remainingDistance(b))[0] || unit;
+          let best = null, bd = Infinity;
+          for (const k of unit.rangeKeys || []) {
+            const r = (k / COLS) | 0, c = k % COLS;
+            if (!freeTile(battle, r, c)) continue;
+            const d = Math.hypot(c - ref.x, r - ref.y) + (battle.grid.groundPassable(r, c) ? 0 : 5);
+            if (d < bd - 1e-9) { bd = d; best = [r, c]; }
+          }
+          if (!best) return;
+          const tok = battle.tokenDef(tokenId, unit); // the owner's skill / module variant (DESIGN §16)
+          const dur = num(tok?.talents?.[0]?.bb?.duration, num(def.skill?.duration, 20));
+          const ob = battle.spawnToken(unit, tokenId, best[0], best[1], { duration: dur, kit: obeliskKit });
+          if (!ob) return;
+          unit.mem.obelisk = ob;
+          battle.fx('obelisk', { x: ob.x, y: ob.y, id: ob.id });
+          const tokGrid = grid(tok?.skill?.rangeGrid) || [[-1, -1], [-1, 0], [-1, 1], [0, -1], [0, 0], [0, 1], [1, -1], [1, 0], [1, 1]];
+          for (const e of targetsInGrid(battle, ob, tokGrid)) {
+            battle.dealDamage(unit, e, { amount: unit.s.atk * num(bb.atk_scale, 2), type: 'arts', isSkill: true, tags: ['skill', 'burst'] });
+            if (e.alive) battle.applyStatus(e, 'stun', { duration: num(bb.stun, 1), source: unit });
+          }
+        },
+        onEnd({ battle, unit }) { battle.removeBuff(unit, 'beewax:keep'); },
+      },
+      talents: [{ install(battle, unit) { // 沙原的庇护: +4 % max HP/s while the skill is off
+        const set = () => toggleBuff(battle, unit, 'beewax:regen', unit.alive && !skillActive(unit), { hpRegenRatio: num(t0.hp_recovery_per_sec_by_max_hp_ratio, 0.04) });
+        for (const ev of ['deploy', 'skillStart', 'skillEnd']) battle.on(ev, (c) => { if (c.unit === unit) set(); }, { owner: unit });
+      } }],
+    };
+  },
+});
@@ -0,0 +1,50 @@
+// server/sim/content/kits/ops/chess_char_4_06-kroos2.js — 寒芒克洛丝 (char_1021_kroos2) kit, tier 4.
+// Conventions of the tier-4 kits: ../shared/tier4.js; kit contract and rules: ../README.md.
+
+import { num, tbb, batFlat, skillActive, isSel, alt, withDefaults } from '../shared/tier4.js';
+
+export default withDefaults({
+  // ===== 寒芒克洛丝 (fastshot) S2 封喉 — double shot → 4 shots after 40 hits; talent 中的 (20 % ×1.5 + 0.2 s stun)
+  //       S1 无痕 (ATK up, double shot, 迷彩 = the engine's `camou` flag: only an enemy she blocks targets her)
+  chess_char_4_06_a: (bb, chess, def) => {
+    const t0 = tbb(def, 0);
+    const need = num(bb['attack@max_stack_count'], 40);
+    const S2 = isSel(def, 'skchr_kroos2_2');
+    return {
+      skills: alt(def, {
+        skchr_kroos2_1: () => ({
+          kind: 'duration',
+          mods: { atkPct: num(bb.atk) },
+          flags: { camou: true },
+          attack: { hits: 2 },
+          onStart({ battle, unit }) { battle.fx('camouflage', { x: unit.x, y: unit.y, id: unit.id }); },
+        }),
+      }),
+      skill: {
+        kind: 'duration',
+        mods: { batPct: batFlat(def, bb.base_attack_time) },
+        attack: { hitsFn: (battle, unit) => ((unit.mem.kroosHits ?? 0) >= need ? 4 : 2) },
+        onStart({ unit }) { unit.mem.kroosHits = 0; },
+      },
+      talents: [{ install(battle, unit) {
+        // 中的: the ×1.5 is rolled before mitigation; the stun (and the S2 "击中目标" count) only for shots that landed
+        const crits = new WeakSet();
+        battle.on('hit', (c) => {
+          if (c.source !== unit || !c.dmg.isAttack || c.target.side !== 'enemy') return;
+          if (battle.rng.chance(num(t0.prob, 0.2))) { c.dmg.mul *= num(t0.atk_scale, 1.5); crits.add(c.dmg); }
+        }, { owner: unit });
+        battle.on('damaged', (c) => {
+          if (c.source !== unit || !c.dmg || !c.dmg.isAttack || c.target.side !== 'enemy') return;
+          if (S2 && skillActive(unit)) {
+            unit.mem.kroosHits = (unit.mem.kroosHits ?? 0) + 1;
+            if (unit.mem.kroosHits === need) battle.fx('quadShot', { x: unit.x, y: unit.y, id: unit.id });
+          }
+          if (!crits.has(c.dmg)) return;
+          crits.delete(c.dmg);
+          if (c.target.alive) battle.applyStatus(c.target, 'stun', { duration: num(t0.stun, 0.2), source: unit });
+          battle.fx('crit', { x: c.target.x, y: c.target.y, id: c.target.id });
+        }, { owner: unit });
+      } }],
+    };
+  },
+});
@@ -0,0 +1,59 @@
+// server/sim/content/kits/ops/chess_char_4_07-bpipe.js — 风笛 (char_222_bpipe) kit, tier 4.
+// Conventions of the tier-4 kits: ../shared/tier4.js; kit contract and rules: ../README.md.
+
+import { sortEnemyTargets } from '../../../targeting.js';
+import { num, tbb, batFlat, alt, withDefaults } from '../shared/tier4.js';
+
+export default withDefaults({
+  // ===== 风笛 (charger) S2 高效冲击 — next attack 145 % ×2 (charges); talents 精密填弹 / 军事传统
+  //       S1 迅捷打击·γ型; S3 闭膛连发 (BAT +0.7 s, block +1, ATK/DEF up, triple hits); module CHG-Y (“棍棒与口袋”):
+  //       attacks on enemies below 40 % HP use 115 % ATK
+  chess_char_4_07_a: (bb, chess, def) => {
+    const t0 = tbb(def, 0), t1 = tbb(def, 1);
+    const tb = def.traitBb || {};
+    return {
+      skills: alt(def, {
+        'skcom_quickattack[3]': () => ({ kind: 'duration', mods: { atkPct: num(bb.atk), aspd: num(bb.attack_speed) } }),
+        skchr_bpipe_3: () => ({
+          kind: 'duration',
+          mods: { atkPct: num(bb.atk), defPct: num(bb.def), blockCnt: num(bb.block_cnt, 1), batPct: batFlat(def, bb.base_attack_time) },
+          attack: { hits: 3 },
+          onStart({ battle, unit }) { battle.fx('buff', { x: unit.x, y: unit.y, id: unit.id }); },
+        }),
+      }),
+      install(battle, unit) {
+        const hr = num(tb.hp_ratio, 0), sc = num(tb.atk_scale, 0);
+        if (!(hr > 0) || !(sc > 0)) return;
+        battle.on('hit', (c) => { // 攻击力提升至115% (before mitigation)
+          if (c.source === unit && c.dmg.isAttack && c.target.side === 'enemy' && c.target.hpRatio < hr) c.dmg.amount *= sc;
+        }, { owner: unit });
+      },
+      skill: {
+        kind: (def.skill?.maxCharges ?? 1) > 1 ? 'charges' : 'instant',
+        attack: { atkScale: num(bb.atk_scale, 1.45), hits: 2 },
+        onStart({ battle, unit }) { battle.fx('charge', { x: unit.x, y: unit.y, id: unit.id }); },
+      },
+      talents: [
+        { install(battle, unit) { // 精密填弹: 25 % → ×1.3 and one extra target
+          battle.on('beforeAttack', (c) => {
+            if (c.attacker !== unit) return;
+            unit.mem.bpBoost = battle.rng.chance(num(t0.prob, 0.25));
+            if (!unit.mem.bpBoost) return;
+            const extra = battle.enemiesInKeys(unit.rangeKeys, unit, c.profile).filter((e) => !c.targets.includes(e));
+            sortEnemyTargets(battle, unit, extra, c.profile?.priority ?? null);
+            if (extra[0]) c.targets = [...c.targets, extra[0]];
+          }, { owner: unit });
+          battle.on('hit', (c) => { if (c.source === unit && c.dmg.isAttack && unit.mem.bpBoost) c.dmg.mul *= num(t0.atk_scale, 1.3); }, { owner: unit });
+          battle.on('attack', (c) => { if (c.attacker === unit) unit.mem.bpBoost = false; }, { owner: unit });
+        } },
+        { install(battle, unit) { // 军事传统: every 先锋 of the team starts with +6 SP
+          battle.on('deploy', (c) => {
+            const u = c.unit;
+            if (u.side !== 'ally' || u.kind !== 'op' || u.ownerId !== unit.ownerId || u.def?.profession !== 'PIONEER' || !u.skill || (u.skill.active && u.skill.isTimed)) return;
+            u.skill.gainSp(num(t1.sp, 6), 'init');
+          }, { owner: unit });
+        } },
+      ],
+    };
+  },
+});
@@ -0,0 +1,47 @@
+// server/sim/content/kits/ops/chess_char_4_08-rosesa.js — 瑰盐 (char_4163_rosesa) kit, tier 4 (hidden).
+// Conventions of the tier-4 kits: ../shared/tier4.js; kit contract and rules: ../README.md.
+
+import { COLS } from '../../../constants.js';
+import {
+  AURA, num, tbb, batFlat, keySet, whileDeployed, pulse, skillActive, applyModuleRange, withDefaults,
+} from '../shared/tier4.js';
+
+export default withDefaults({
+  // ===== 瑰盐 (ringhealer, hidden) S2 绝妙的长效药呀 — allies in range: 20 % of phys/arts damage → 5 s HP loss
+  chess_char_4_08_a: (bb, chess, def) => {
+    const t0 = tbb(def, 0);
+    const scale = num(bb['attack@damage_scale'], 0.8), fin = num(bb['attack@final_duration'], 5), iv = Math.max(0.1, num(bb['attack@interval'], 1));
+    return {
+      skill: { kind: 'duration', heal: true, mods: { batPct: batFlat(def, bb.base_attack_time) },
+        onStart({ battle, unit }) { battle.fx('saltWard', { x: unit.x, y: unit.y, id: unit.id }); } },
+      talents: [{ install(battle, unit) { // 最好的草药医生: own ATK −5 %, operators in range receive +15 % healing
+        battle.addBuff(unit, { key: 'rosesa:t1', mods: { atkPct: num(t0.atk, -0.05) }, persist: true, allowDead: true });
+        whileDeployed(battle, unit, AURA, () => {
+          for (const a of battle.alliesInGrid(unit)) if (a.kind === 'op') pulse(battle, a, `rosesa:heal:${unit.id}`, { healingTakenMul: num(t0.heal_scale, 1.15) });
+        });
+      } }],
+      install(battle, unit) {
+        const deferred = new WeakSet();
+        battle.on('hit', (c) => {
+          const t = c.target;
+          // "友方干员": operators only (summons/devices keep the full hit)
+          if (!skillActive(unit) || !unit.alive || t.side !== 'ally' || t.kind !== 'op' || (c.dmg.type !== 'phys' && c.dmg.type !== 'arts')) return;
+          if (!keySet(unit).has(t.tileR * COLS + t.tileC)) return;
+          c.dmg.mul *= scale;
+          deferred.add(c.dmg);
+        }, { owner: unit, priority: -5 });
+        battle.on('damaged', (c) => {
+          if (!deferred.has(c.dmg) || !(c.amount > 0) || !c.target.alive) return;
+          deferred.delete(c.dmg);
+          const total = (c.amount * (1 - scale)) / Math.max(1e-6, scale);
+          const per = total / Math.max(1, Math.round(fin / iv));
+          const src = c.source;
+          battle.addBuff(c.target, { key: 'rosesa:dot', refresh: 'independent', maxStacks: 1000, duration: fin + 1e-6, interval: iv,
+            onTick: ({ unit: tgt }) => battle.loseHp(tgt, per, { source: src && src.side === 'enemy' ? src : null }) });
+        }, { owner: unit });
+        // module (elite) RIN-X: 攻击范围扩大 (module range grid)
+        applyModuleRange(battle, unit, def);
+      },
+    };
+  },
+});
@@ -0,0 +1,62 @@
+// server/sim/content/kits/ops/chess_char_4_09-mizuki.js — 水月 (char_437_mizuki) kit, tier 4.
+// Conventions of the tier-4 kits: ../shared/tier4.js; kit contract and rules: ../README.md.
+
+import {
+  AURA, num, tbb, moduleBb, grid, batFlat, enemiesOnRange, whileDeployed, pulse, toggleBuff, skillActive, isSel, alt,
+  instantKind, withDefaults,
+} from '../shared/tier4.js';
+
+export default withDefaults({
+  // ===== 水月 (stalker) S2 囚徒困境 — faster, +ATK, talent 1 +1 target & bind; talents 创伤性癔症 / 反移情; module slow
+  //       S1 唤醒 (charges: next attack 200 %/230 %, talent 1 ×2.0/×2.3); S3 镜花水月 (wider range, ATK up, talent 1 +2
+  //       targets & stun; an attack hitting < 3 enemies costs 15 % max HP); modules: AMB-Y 65 % dodge (trait, profession)
+  chess_char_4_09_a: (bb, chess, def) => {
+    const t0 = tbb(def, 0), t1 = tbb(def, 1), mb = moduleBb(def);
+    const S1 = isSel(def, 'skchr_mizuki_1'), S2 = isSel(def, 'skchr_mizuki_2'), S3 = isSel(def, 'skchr_mizuki_3');
+    const g = grid(def.skill?.rangeGrid);
+    return {
+      skills: alt(def, {
+        skchr_mizuki_1: () => ({ kind: instantKind(def), attack: { atkScale: num(bb.atk_scale, 2) } }),
+        skchr_mizuki_3: () => ({
+          kind: 'duration',
+          mods: { atkPct: num(bb.atk) },
+          targeting: g ? { rangeGrid: g } : undefined,
+          onStart({ battle, unit }) { battle.fx('ripple', { x: unit.x, y: unit.y, id: unit.id }); },
+          onAttack({ battle, unit, targets }) {
+            if ((targets || []).filter((e) => e.side === 'enemy').length >= 3) return;
+            battle.loseHp(unit, unit.s.maxHp * num(bb['attack@hp_ratio'], 0.15), { tags: ['skill', 'selfLoss'] }); // (no source: not damage dealt)
+          },
+        }),
+      }),
+      skill: { kind: 'duration', mods: { batPct: batFlat(def, bb.base_attack_time), atkPct: num(bb.atk) },
+        onStart({ battle, unit }) { battle.fx('dilemma', { x: unit.x, y: unit.y, id: unit.id }); } },
+      talents: [
+        { install(battle, unit) { // 创伤性癔症: +50 % ATK arts to the lowest-HP enemy hit (S2 +1 target & bind, S3 +2 & stun, S1 ×2)
+          battle.on('attack', (c) => {
+            if (c.attacker !== unit || !unit.alive) return;
+            const act = skillActive(unit) && (S2 || S3);
+            const n = Math.max(1, Math.floor(num(t0['attack@max_target'], 1))) + (act ? Math.floor(num(bb['attack@max_target'], 1)) : 0);
+            const mul = S1 && c.isSkill ? num(bb.talent_scale, 2) : 1;
+            const list = c.targets.filter((e) => e.alive && e.side === 'enemy').sort((a, b) => a.hp - b.hp || a.id - b.id).slice(0, n);
+            for (const e of list) {
+              battle.dealDamage(unit, e, { amount: unit.s.atk * num(t0['attack@mizuki_t_1.atk_scale'], 0.5) * mul, type: 'arts', tags: ['talent'] });
+              if (!act || !e.alive) continue;
+              if (S2) battle.applyStatus(e, 'bind', { duration: num(bb['attack@unmovable'], 0.8), source: unit });
+              else battle.applyStatus(e, 'stun', { duration: num(bb['attack@stun'], 0.7), source: unit });
+            }
+          }, { owner: unit });
+        } },
+        { install(battle, unit) { // 反移情: ATK +10 % while an enemy in range is below 50 % HP
+          whileDeployed(battle, unit, 0.1, () => {
+            const on = enemiesOnRange(battle, unit).some((e) => e.hpRatio < num(t1.hp_ratio, 0.5));
+            toggleBuff(battle, unit, 'mizuki:t2', on, { atkPct: num(t1.atk, 0.1) });
+          });
+        } },
+      ],
+      install(battle, unit) {
+        const ms = num(mb.move_speed, 0);
+        if (ms) whileDeployed(battle, unit, AURA, () => { for (const e of enemiesOnRange(battle, unit)) pulse(battle, e, `mizuki:slow:${unit.id}`, { moveMul: Math.max(0, 1 + ms) }); });
+      },
+    };
+  },
+});
@@ -0,0 +1,81 @@
+// server/sim/content/kits/ops/chess_char_4_10-aroma.js — 阿罗玛 (char_446_aroma) kit, tier 4.
+// Conventions of the tier-4 kits: ../shared/tier4.js; kit contract and rules: ../README.md.
+
+import { bodyInKeys } from '../../../body.js';
+import { num, tbb, keySet, skillActive, isSel, alt, instantKind, withDefaults } from '../shared/tier4.js';
+
+/** 阿罗玛's 非首次标记 (talent 起泡性能测试): one per enemy, shared by every 阿罗玛 (PRTS 备注). */
+const AROMA_MARK = 'aroma:bubbled';
+
+export default withDefaults({
+  // ===== 阿罗玛 (blastcaster) S2 小心地滑 — +ATK, levitated enemies take 65 % ATK arts on landing; talent 起泡性能测试
+  //       S1 强效清洁 (charges: next attack 150 %/180 % arts, flying victims +55 %/70 % ATK arts)
+  chess_char_4_10_a: (bb, chess, def) => {
+    const t0 = tbb(def, 0);
+    const tb = def.traitBb || {};
+    const land = num(bb['attack@atk_scale_when_fly_finish'], 0.65);
+    const S2 = isSel(def, 'skchr_aroma_2');
+    return {
+      skills: alt(def, {
+        skchr_aroma_1: () => ({
+          kind: instantKind(def),
+          attack: {
+            atkScale: num(bb.atk_scale, 1.5),
+            onEachHit({ battle, unit, target }) { // every enemy of her line the blast strikes that flies
+              if (target && target.alive && target.isFlying) battle.dealDamage(unit, target, { amount: unit.s.atk * num(bb.atk_scale_to_fly, 0.55), type: 'arts', isSkill: true, tags: ['skill', 'antiAir'] });
+            },
+          },
+        }),
+      }),
+      skill: { kind: 'duration', mods: { atkPct: num(bb.atk) }, onStart({ battle, unit }) { battle.fx('slippery', { x: unit.x, y: unit.y, id: unit.id }); } },
+      talents: [{ install(battle, unit) { // first attack on each enemy: ×1.1 and levitate 2.5 s
+        // PRTS 阿罗玛 备注: "天赋采用施加非首次标记的方式判断是否为'首次进行攻击'，自身离场时移除自身已施加的标记，不同阿罗玛之间的
+        // 非首次标记通用" — one mark per enemy (AROMA_MARK, the setter as source) for every 阿罗玛; hers go when she leaves
+        // the field (until 0.1.1 each 阿罗玛 kept her own list, so two of them both triggered on one enemy)
+        unit.mem.bubbled = new Set(); // the enemies she marked
+        battle.on('hit', (c) => {
+          const e = c.target;
+          if (c.source !== unit || !c.dmg.isAttack || e.side !== 'enemy' || e.findBuff(AROMA_MARK)) return;
+          battle.addBuff(e, { key: AROMA_MARK, source: unit });
+          unit.mem.bubbled.add(e.id);
+          c.dmg.mul *= num(t0.damage_scale, 1.1);
+          if (battle.applyStatus(e, 'levitate', { duration: num(t0.levitate_duration, 2.5), source: unit })) battle.fx('levitate', { x: e.x, y: e.y, id: e.id });
+        }, { owner: unit });
+        battle.on('death', (c) => {
+          if (c.unit !== unit) return;
+          for (const id of unit.mem.bubbled) {
+            const e = battle.unitById(id);
+            if (e && e.findBuff(AROMA_MARK)?.source === unit) battle.removeBuff(e, AROMA_MARK);
+          }
+          unit.mem.bubbled.clear();
+        }, { owner: unit });
+      } }],
+      install(battle, unit) {
+        // S2: landing damage for every levitated enemy (any source) that lands inside her range while the skill runs
+        const floating = new Map();
+        battle.on('statusApplied', (c) => { if (c.status === 'levitate' && c.target.side === 'enemy') floating.set(c.target.id, c.target); }, { owner: unit });
+        battle.every(1 / 30, () => {
+          for (const [id, e] of floating) {
+            if (!e.alive) { floating.delete(id); continue; }
+            if (e.findBuff('levitate')) continue;
+            floating.delete(id);
+            if (S2 && unit.alive && unit.deployed && skillActive(unit) && bodyInKeys(e, keySet(unit))) {
+              battle.dealDamage(unit, e, { amount: unit.s.atk * land, type: 'arts', isSkill: true, tags: ['skill', 'landing'] });
+              battle.fx('splash', { x: e.x, y: e.y, id: e.id });
+            }
+          }
+        }, { owner: unit });
+        // module (elite) trait: farther targets take more damage (up to ×1.1)
+        const ds = num(tb.damage_scale, 0);
+        if (ds > 0) {
+          const lo = num(tb.min_dist, 0), hi = num(tb.max_dist, 4);
+          battle.on('hit', (c) => {
+            if (c.source !== unit || !c.dmg.isAttack) return;
+            const d = Math.hypot(c.target.x - unit.x, c.target.y - unit.y);
+            c.dmg.mul *= 1 + ds * Math.max(0, Math.min(1, (d - lo) / Math.max(1e-6, hi - lo)));
+          }, { owner: unit });
+        }
+      },
+    };
+  },
+});
@@ -0,0 +1,38 @@
+// server/sim/content/kits/ops/chess_char_4_11-cathy.js — 凯瑟琳 (char_4162_cathy) kit, tier 4.
+// Conventions of the tier-4 kits: ../shared/tier4.js; kit contract and rules: ../README.md.
+
+import { CAT_SHIELD_KEY } from '../../tokens.js';
+import { AURA, num, whileDeployed, pulse, alt, withDefaults } from '../shared/tier4.js';
+
+export default withDefaults({
+  // ===== 凯瑟琳 (craftsman) S2 战火淬炼 — stops attacking, HP/DEF up, devices give 6 %/s shields; talent 定向支援信号
+  //       "携带3个支援装置（最多部署2个）": the 爬行号·防护单元 are hand pieces (2 = the deploy limit) the player places and
+  //       turns towards an operator (user playtest #6, PRTS 卫戍协议/帮助 §战斗部署); they deploy with the board and the
+  //       token kit (tokens.js catShield) gives the shields — S2 overwrite_ratio per second while this skill runs — so
+  //       this kit places nothing (none placed ⇒ no device).
+  //       S1 岁月锻打 (passive: she and every other operator holding a device shield ATK/DEF +8 %/+11 %); module CRA-X
+  //       carries one more device (talent cnt, data — a spare the hand never shows)
+  chess_char_4_11_a: (bb, chess, def) => ({
+    skills: alt(def, {
+      skchr_cathy_1: () => ({
+        kind: 'passive',
+        mods: { atkPct: num(bb.s1_atk), defPct: num(bb.s1_def) },
+        onStart({ battle, unit }) {
+          unit.mem.forgeAura?.cancel();
+          unit.mem.forgeAura = whileDeployed(battle, unit, AURA, () => {
+            for (const a of battle.allies(unit.ownerId)) {
+              if (a === unit || a.kind !== 'op' || !a.findBuff(CAT_SHIELD_KEY)) continue;
+              pulse(battle, a, `cathy:forge:${unit.id}`, { atkPct: num(bb.s1_atk), defPct: num(bb.s1_def) });
+            }
+          });
+        },
+      }),
+    }),
+    skill: {
+      kind: 'duration',
+      mods: { hpPct: num(bb.max_hp), defPct: num(bb.def) },
+      attack: { noAttack: true },
+      onStart({ battle, unit }) { battle.fx('overclock', { x: unit.x, y: unit.y, id: unit.id }); },
+    },
+  }),
+});
@@ -0,0 +1,100 @@
+// server/sim/content/kits/ops/chess_char_4_12-glady.js — 歌蕾蒂娅 (char_474_glady) kit, tier 4.
+// Conventions of the tier-4 kits: ../shared/tier4.js; kit contract and rules: ../README.md.
+
+import { bodyDist } from '../../../body.js';
+import {
+  AURA, num, tbb, moduleBb, grid, batFlat, enemyHasTag, targetsInRange, whileDeployed, pulse, alt, instantKind,
+  pullToFront, withDefaults,
+} from '../shared/tier4.js';
+
+const ABYSSAL = new Set(['char_143_ghost', 'char_263_skadi', 'char_474_glady', 'char_4145_ulpia', 'char_1023_ghost2']);
+const isAbyssal = (u) => u?.def?.raw?.groupId === 'abyssal' || ABYSSAL.has(u?.def?.charId ?? u?.def?.raw?.charId);
+
+export default withDefaults({
+  // ===== 歌蕾蒂娅 (hookmaster) S3 缺水的碎漩狂舞 — bind a far target, tornado: slow, 85 % arts pulses + pull, final pull
+  //       S1 缺水的大洋裂断 (charges: next attack pulls the target to her front, 150 %/180 %); S2 缺水的掌握怒海 (BAT +0.5 s,
+  //       wider range, ≤ 2 targets — blocked first — at 135 %/150 % and pulled to her front); module HOK-Y (淡金坠饰):
+  //       a pull towards herself of an enemy farther than 2.5 tiles is one force level stronger
+  chess_char_4_12_a: (bb, chess, def) => {
+    const t0 = tbb(def, 0), t1 = tbb(def, 1), mb = moduleBb(def);
+    const tb = def.traitBb || {};
+    const R = 1.5; // [ASSUMED] tornado radius (no blackboard key)
+    const force = num(bb.force, num(bb['attack@force'], 0));
+    const iv = Math.max(0.1, num(bb.interval, 1.5));
+    const g = grid(def.skill?.rangeGrid);
+    const dragDmg = (battle, unit, e, moved) => { // module: dragged enemies take arts damage ∝ distance
+      if (!(moved > 0) || !(num(tb.value, 0) > 0) || !e.alive) return;
+      battle.dealDamage(unit, e, { amount: num(tb.value) * moved / Math.max(1e-6, num(tb.dist, 1)), type: 'arts', isSkill: true, tags: ['drag'] });
+    };
+    // module HOK-Y: "向自身拖拽较远的敌人时力度提升一个等级"
+    const farR = num(mb['skill@range_radius'], num(mb['attack@range_radius'], 0)), farF = num(mb['skill@delta_force'], num(mb['attack@delta_force'], 0));
+    const selfForce = (unit, e, f) => (farR > 0 && farF > 0 && Math.hypot(e.x - unit.x, e.y - unit.y) > farR + 1e-9 ? f + farF : f);
+    const pullSelf = (battle, unit, e, f) => { if (e && e.alive) dragDmg(battle, unit, e, pullToFront(battle, unit, e, selfForce(unit, e, f))); };
+    return {
+      skills: alt(def, {
+        skchr_glady_1: () => ({
+          kind: instantKind(def),
+          attack: { atkScale: num(bb.atk_scale, 1.5), onHit({ battle, unit, target }) { pullSelf(battle, unit, target, num(bb.force, 1)); } },
+        }),
+        skchr_glady_2: () => ({
+          kind: 'duration',
+          mods: { batPct: batFlat(def, bb.base_attack_time) },
+          // (target sorting already puts the enemies she blocks first)
+          targeting: { ...(g ? { rangeGrid: g } : {}), maxTargets: Math.max(1, Math.floor(num(bb['attack@max_target'], 2))) },
+          attack: { atkScale: num(bb['attack@atk_scale'], 1.35), onEachHit({ battle, unit, target }) { pullSelf(battle, unit, target, num(bb['attack@force'], 1)); } },
+          onStart({ battle, unit }) { battle.fx('wake', { x: unit.x, y: unit.y, id: unit.id }); },
+        }),
+      }),
+      skill: {
+        kind: 'duration',
+        onStart({ battle, unit, skill }) {
+          const foes = targetsInRange(battle, unit).sort((a, b) => bodyDist(b, unit.x, unit.y) - bodyDist(a, unit.x, unit.y) || a.id - b.id);
+          const t = foes[0];
+          unit.mem.tornado = t ? { x: t.x, y: t.y, acc: 0 } : null;
+          if (!t) return;
+          battle.applyStatus(t, 'bind', { duration: skill.duration, source: unit });
+          battle.fx('tornado', { x: t.x, y: t.y, id: unit.id, r: R, duration: skill.duration });
+        },
+        onTick({ battle, unit, dt }) {
+          const T = unit.mem.tornado;
+          if (!T) return;
+          const inside = battle.foesInRadius(T.x, T.y, R);
+          for (const e of inside) pulse(battle, e, `glady:slow:${unit.id}`, { moveMul: Math.max(0, 1 + num(bb.move_speed, -0.5)) });
+          T.acc += dt;
+          if (T.acc + 1e-9 < iv) return;
+          T.acc -= iv;
+          for (const e of inside) {
+            if (!e.alive || e.s.flags.untargetable) continue;
+            battle.dealDamage(unit, e, { amount: unit.s.atk * num(bb.atk_scale, 0.85), type: 'arts', isSkill: true, tags: ['skill', 'tornado'] });
+            // "小力地拖拽至中心": a pull to the marked point (PRTS 推与拉: its 6 tornado pulls stop 0.05 from it)
+            if (e.alive) dragDmg(battle, unit, e, battle.pull(e, force, { to: T, stop: 0.05 }));
+          }
+          battle.fx('tornadoPulse', { x: T.x, y: T.y, id: unit.id, r: R });
+        },
+        onEnd({ battle, unit, reason }) {
+          const T = unit.mem.tornado;
+          unit.mem.tornado = null;
+          if (!T || reason === 'death' || !unit.alive) return;
+          for (const e of battle.foesInRadius(T.x, T.y, R)) pullSelf(battle, unit, e, force);
+          battle.fx('pull', { x: T.x, y: T.y, id: unit.id });
+        },
+      },
+      talents: [
+        { install(battle, unit) { // 阿戈尔的波涛: 深海猎人 regen 2.5 %/s, −25 % phys/arts damage from 海怪
+          whileDeployed(battle, unit, AURA, () => {
+            for (const a of battle.allies(unit.ownerId)) if (isAbyssal(a)) pulse(battle, a, 'glady:tide', { hpRegenRatio: num(t0.hp_recovery_per_sec_by_max_hp_ratio, 0.025) });
+          });
+          battle.on('hit', (c) => {
+            if (!c.target.findBuff?.('glady:tide') || !enemyHasTag(c.source, 'seamonster') || (c.dmg.type !== 'phys' && c.dmg.type !== 'arts')) return;
+            c.dmg.mul *= 1 - num(t0.damage_resistance, 0.25);
+          }, { owner: unit });
+        } },
+        { install(battle, unit) { // 弱肉强食: ×1.3 against enemies of weight ≤ 3
+          battle.on('hit', (c) => {
+            if (c.source === unit && c.dmg.isAttack && c.target.side === 'enemy' && c.target.s.massLevel <= num(t1.value, 3)) c.dmg.mul *= num(t1.atk_scale, 1.3);
+          }, { owner: unit });
+        } },
+      ],
+    };
+  },
+});
@@ -0,0 +1,112 @@
+// server/sim/content/kits/ops/chess_char_4_13-gnosis.js — 灵知 (char_206_gnosis) kit, tier 4.
+// Conventions of the tier-4 kits: ../shared/tier4.js; kit contract and rules: ../README.md.
+
+import { sortEnemyTargets } from '../../../targeting.js';
+import {
+  AURA, AURA_DUR, num, tbb, nationOf, enemiesOnRange, targetsInRange, whileDeployed, toggleBuff, skillActive, isSel,
+  alt, instantKind, withDefaults,
+} from '../shared/tier4.js';
+
+/** Enemy leaders / elites (精英或领袖敌人). */
+const isEliteEnemy = (e) => !!e && (e.isBoss || e.def?.rank === 'ELITE' || e.def?.rank === 'BOSS');
+
+export default withDefaults({
+  // ===== 灵知 (underminer) S2 零度爆发 — charges: 130 % arts + cold to all in range, charged ⇒ 2nd cold; 坚冰 / 殊途同归
+  //       S1 高速思考 (next attack: 2 × 135 %/150 % arts); S3 失温症 (ASPD up, 2 targets — unfrozen first; frozen enemies
+  //       in range stay frozen until the skill ends, then take 300 %/400 % arts and thaw); module UMD-Y (一号项目模型):
+  //       +0.25 SP/s while an elite / leader enemy is in range
+  chess_char_4_13_a: (bb, chess, def) => {
+    const t0 = tbb(def, 0), t1 = tbb(def, 1);
+    const tb = def.traitBb || {};
+    const S3 = isSel(def, 'skchr_gnosis_3');
+    const frozen = (e) => !!e.findBuff('freeze');
+    return {
+      skills: alt(def, {
+        skchr_gnosis_1: () => ({ kind: instantKind(def), attack: { atkScale: num(bb.atk_scale, 1.35), hits: 2 } }),
+        skchr_gnosis_3: () => ({
+          kind: 'duration',
+          mods: { aspd: num(bb.attack_speed) },
+          targeting: { maxTargets: Math.max(1, Math.floor(num(bb.max_target, 2))) },
+          onStart({ battle, unit }) { unit.mem.hypothermia = new Set(); battle.fx('coldWind', { x: unit.x, y: unit.y, id: unit.id }); },
+          onTick({ battle, unit, skill }) {
+            const H = unit.mem.hypothermia;
+            if (!H) return;
+            // 范围内所有敌人的冻结延长至技能结束
+            for (const e of enemiesOnRange(battle, unit)) {
+              const f = e.findBuff('freeze');
+              if (!f) continue;
+              H.add(e.id);
+              if (f.timeLeft < skill.timeLeft) { f.timeLeft = skill.timeLeft; f.duration = Math.max(f.duration, skill.timeLeft); }
+            }
+          },
+          onEnd({ battle, unit, reason }) {
+            const H = unit.mem.hypothermia;
+            unit.mem.hypothermia = null;
+            if (!H || reason === 'death' || !unit.alive) return;
+            // 技能结束时对所有冻结的敌人造成N%的法术伤害并结束冻结 (the frozen enemies of her range)
+            const list = enemiesOnRange(battle, unit).filter(frozen);
+            for (const id of H) { const e = battle.unitById(id); if (e && e.alive && frozen(e) && !list.includes(e)) list.push(e); }
+            for (const e of list) {
+              battle.dealDamage(unit, e, { amount: unit.s.atk * num(bb.atk_scale, 3), type: 'arts', isSkill: true, tags: ['skill', 'shatter'] });
+              if (e.alive) battle.removeStatus(e, 'freeze');
+            }
+            battle.fx('iceSpike', { x: unit.x, y: unit.y, id: unit.id, n: list.length });
+          },
+        }),
+      }),
+      install(battle, unit) {
+        if (S3) {
+          // 优先攻击未冻结的单位 (while S3 runs)
+          battle.on('beforeAttack', (c) => {
+            if (c.attacker !== unit || !skillActive(unit)) return;
+            const cands = battle.enemiesInKeys(unit.rangeKeys, unit, c.profile);
+            for (const e of battle.blockedTargets(unit, c.profile)) if (!cands.includes(e)) cands.push(e); // DESIGN §20.3
+            if (cands.length <= 1) return;
+            sortEnemyTargets(battle, unit, cands, c.profile?.priority ?? null);
+            const n = Math.max(1, Math.floor((c.profile?.maxTargets || 1) + unit.s.maxTargets));
+            c.targets = [...cands.filter((e) => !frozen(e)), ...cands.filter(frozen)].slice(0, n);
+          }, { owner: unit, priority: 5 });
+        }
+        const sp = num(tb.sp_recovery_per_sec, 0); // module UMD-Y
+        if (sp > 0) whileDeployed(battle, unit, 0.1, () => toggleBuff(battle, unit, 'gnosis:module', enemiesOnRange(battle, unit).some(isEliteEnemy), { spRecoveryFlat: sp }));
+      },
+      skill: {
+        kind: (def.skill?.maxCharges ?? 1) > 1 ? 'charges' : 'instant',
+        onStart({ battle, unit, skill }) {
+          const charged = skill.maxCharges > 1 && skill.charges + 1 >= skill.maxCharges; // cast with every charge stored
+          for (const e of targetsInRange(battle, unit)) {
+            battle.dealDamage(unit, e, { amount: unit.s.atk * num(bb.atk_scale, 1.3), type: 'arts', isSkill: true, tags: ['skill', 'burst'] });
+            if (!e.alive) continue;
+            battle.applyStatus(e, 'cold', { duration: num(bb.cold, 2.5), source: unit });
+            if (charged && e.alive) battle.applyStatus(e, 'cold', { duration: num(bb.cold, 2.5), source: unit });
+          }
+          battle.fx('frostNova', { x: unit.x, y: unit.y, id: unit.id, charged });
+        },
+      },
+      talents: [
+        { install(battle, unit) { // 坚冰: attacks chill 1 s; cold enemies in range fragile 25 %, frozen 50 %
+          battle.on('damaged', (c) => {
+            if (c.source === unit && c.dmg?.isAttack && !c.dmg.isSplash && c.target.side === 'enemy' && c.target.alive) battle.applyStatus(c.target, 'cold', { duration: num(t0.cold, 1), source: unit });
+          }, { owner: unit });
+          whileDeployed(battle, unit, 0.1, () => {
+            for (const e of enemiesOnRange(battle, unit)) {
+              const f = e.s.flags;
+              const m = f.freeze ? num(t0.damage_scale_freeze, 1.5) : f.cold ? num(t0.damage_scale_cold, 1.25) : 0;
+              // 同名效果取最高: one 坚冰 per enemy, the strongest — two 灵知 (a pair / 联防 partner's copy) never compound
+              if (m) battle.applyStrongest(e, 'gnosis:fragile', { duration: 0.15, value: m, mods: (v) => ({ dmgTakenMul: v }), source: unit });
+            }
+          });
+        } },
+        { install(battle, unit) { // 殊途同归: 10 s after deployment every 谢拉格 operator gains 抵抗 (negative status durations ×0.5)
+          // engine `resist` status (applied before a new status lands, so a longer one already running is never
+          // shortened; 同名效果不叠加: several 灵知 — or 流明's 抵抗 — never compound)
+          const value = Math.min(1, Math.max(0, -num(t1.one_minus_status_resistance, -0.5)));
+          whileDeployed(battle, unit, AURA, () => {
+            if (battle.time - unit.deployedAt < num(t1.interval, 10) - 1e-9 || !(value > 0)) return;
+            for (const a of battle.allies(unit.ownerId)) if (a.kind === 'op' && nationOf(a) === 'kjerag') battle.applyStatus(a, 'resist', { duration: AURA_DUR, value, source: unit });
+          });
+        } },
+      ],
+    };
+  },
+});
@@ -0,0 +1,37 @@
+// server/sim/content/kits/ops/chess_char_4_14-lionhd.js — 莱恩哈特 (char_373_lionhd) kit, tier 4.
+// Conventions of the tier-4 kits: ../shared/tier4.js; kit contract and rules: ../README.md.
+
+import {
+  num, tbb, grid, targetsInRange, whileDeployed, toggleBuff, resCut, alt, applyModuleRange, withDefaults,
+} from '../shared/tier4.js';
+
+export default withDefaults({
+  // ===== 莱恩哈特 (splashcaster) S2 解构与爆破 — charges: 170 % arts to all in the wider range + RES −8 % for 6 s; 破片杀伤
+  chess_char_4_14_a: (bb, chess, def) => {
+    const t0 = tbb(def, 0);
+    const g = grid(def.skill?.rangeGrid);
+    const mr = num(bb.magic_resistance, 0);
+    return {
+      skills: alt(def, { 'skcom_atk_up[3]': () => ({ kind: 'duration', mods: { atkPct: num(bb.atk) } }) }), // S1 攻击力强化·γ型
+      skill: {
+        kind: (def.skill?.maxCharges ?? 1) > 1 ? 'charges' : 'instant',
+        targeting: g ? { rangeGrid: g } : undefined,
+        onStart({ battle, unit }) {
+          for (const e of targetsInRange(battle, unit)) {
+            battle.dealDamage(unit, e, { amount: unit.s.atk * num(bb.atk_scale, 1.7), type: 'arts', isSkill: true, tags: ['skill', 'burst'] });
+            // 同名效果取最高: one RES cut per enemy (the strongest), never one per 莱恩哈特
+            if (e.alive && mr) battle.applyStrongest(e, 'lionhd:res', { duration: num(bb.duration, 6), value: mr, mods: resCut, source: unit });
+          }
+          battle.fx('explosion', { x: unit.x, y: unit.y, id: unit.id });
+        },
+      },
+      talents: [{ install(battle, unit) { // 破片杀伤: ATK +4 % per enemy in range (≤ 5)
+        whileDeployed(battle, unit, 0.1, () => {
+          const n = Math.min(num(t0.max_valid_stack_cnt, 5), targetsInRange(battle, unit).length);
+          toggleBuff(battle, unit, 'lionhd:t1', n > 0, { atkPct: num(t0.atk, 0.04) * n });
+        });
+      } }],
+      install(battle, unit) { applyModuleRange(battle, unit, def); }, // module SPC-X (elite default): 攻击范围扩大
+    };
+  },
+});
@@ -0,0 +1,41 @@
+// server/sim/content/kits/ops/chess_char_4_15-reckpr.js — 录武官 (char_4196_reckpr) kit, tier 4 (hidden).
+// Conventions of the tier-4 kits: ../shared/tier4.js; kit contract and rules: ../README.md.
+
+import { COLS } from '../../../constants.js';
+import { isHpLoss } from '../../../damage.js';
+import { num, tbb, keySet, skillActive, installLowHpHealBonus, withDefaults } from '../shared/tier4.js';
+
+export default withDefaults({
+  // ===== 录武官 (physician, hidden) S2 一点关窍 — +ATK; healed allies regain 80 HP per hit taken for 10 s; 学成于聚
+  chess_char_4_15_a: (bb, chess, def) => {
+    const t0 = tbb(def, 0);
+    const tb = def.traitBb || {};
+    return {
+      skill: {
+        kind: 'duration', heal: true,
+        mods: { atkPct: num(bb.atk) },
+        onStart({ battle, unit }) { battle.fx('knack', { x: unit.x, y: unit.y, id: unit.id }); },
+        onHit({ battle, unit, target }) {
+          if (target && target.alive && target.side === 'ally' && target.kind === 'op') battle.addBuff(target, { key: `reckpr:guard:${unit.id}`, duration: num(bb['attack@buff_duration'], 10), visible: true, source: unit });
+        },
+      },
+      talents: [{ install(battle, unit) { // 学成于聚: an operator in range casts ⇒ +1 SP and ASPD +16 for 8 s
+        battle.on('skillStart', (c) => {
+          const a = c.unit;
+          if (a === unit || a.side !== 'ally' || a.kind !== 'op' || !unit.alive || !unit.deployed || !keySet(unit).has(a.tileR * COLS + a.tileC)) return;
+          if (!battle.rng.chance(num(t0.prob, 1))) return;
+          if (!skillActive(unit)) unit.skill?.gainSp(num(t0.sp, 1), 'talent');
+          battle.addBuff(unit, { key: 'reckpr:t1', duration: num(t0.duration, 8), mods: { aspd: num(t0.attack_speed, 16) }, maxStacks: Math.max(1, num(t0.max_stack_cnt, 1)) });
+        }, { owner: unit });
+      } }],
+      install(battle, unit) {
+        battle.on('damaged', (c) => {
+          const t = c.target;
+          if (t.side !== 'ally' || !t.alive || !(c.amount > 0) || isHpLoss(c.dmg) || !t.findBuff(`reckpr:guard:${unit.id}`)) return;
+          battle.heal(unit, t, num(bb['attack@fixed_heal_value'], 80));
+        }, { owner: unit });
+        installLowHpHealBonus(battle, unit, tb);
+      },
+    };
+  },
+});
@@ -0,0 +1,115 @@
+// server/sim/content/kits/ops/chess_char_4_16-texas2.js — 缄默德克萨斯 (char_1028_texas2) kit, tier 4.
+// Conventions of the tier-4 kits: ../shared/tier4.js; kit contract and rules: ../README.md.
+
+import { sortEnemyTargets } from '../../../targeting.js';
+import {
+  AURA, num, tbb, grid, targetsInGrid, whileDeployed, toggleBuff, resCut, isSel, alt, lonely, withDefaults,
+} from '../shared/tier4.js';
+
+export default withDefaults({
+  // ===== 缄默德克萨斯 (executor) S3 剑雨滂沱 (passive) — deploy burst 2×115 % + 1.5 s stun, sword rain 1/s; talents
+  //       S1 细雨无声 (passive, for the skill duration: ATK up; hits silence the target 5 s/8 s — 失去特殊能力 — with
+  //       260/320 arts per s meanwhile); S2 阵雨连绵 (passive: deploy burst 150 %/180 % arts + RES −15 %/−20 % around her;
+  //       for the skill duration ATK up and attacks become arts double hits). Talent 德克萨斯传统 applies to every passive.
+  //       The S3 rain hits air units (PRTS 备注 "效果可对空"); so does the S2 deploy burst [ASSUMED: no note].
+  chess_char_4_16_a: (bb, chess, def) => {
+    const t0 = tbb(def, 0), t1 = tbb(def, 1);
+    const tb = def.traitBb || {};
+    const g = grid(def.skill?.rangeGrid) || [[-1, -1], [-1, 0], [-1, 1], [0, -1], [0, 0], [0, 1], [1, -1], [1, 0], [1, 1]];
+    const S1 = isSel(def, 'skchr_texas2_1'), S2 = isSel(def, 'skchr_texas2_2');
+    const dur = num(def.skill?.duration, S1 ? 11 : S2 ? 8 : 6);
+    const talentAtk = (battle, unit) => battle.addBuff(unit, { key: 'texas2:rainAtk', duration: dur, mods: { atkPct: num(t0.atk, 0.2) } });
+    const castS1 = (battle, unit) => {
+      if (!unit.alive || !unit.deployed) return;
+      talentAtk(battle, unit);
+      battle.addBuff(unit, { key: 'texas2:drizzle', duration: dur, mods: { atkPct: num(bb.atk) }, visible: true });
+      battle.fx('swordRain', { x: unit.x, y: unit.y, id: unit.id });
+    };
+    const castS2 = (battle, unit) => {
+      if (!unit.alive || !unit.deployed) return;
+      talentAtk(battle, unit);
+      battle.addBuff(unit, { key: 'texas2:shower', duration: dur, mods: { atkPct: num(bb.atk) }, visible: true });
+      const mr = num(bb.magic_resistance, 0);
+      for (const e of targetsInGrid(battle, unit, g)) {
+        battle.dealDamage(unit, e, { amount: unit.s.atk * num(bb.atk_scale, 1.5), type: 'arts', isSkill: true, tags: ['skill', 'burst'] });
+        // 同名效果取最高: one RES cut per enemy (the strongest), never one per 缄默德克萨斯
+        if (e.alive && mr) battle.applyStrongest(e, 'texas2:resDown', { duration: num(bb.debuff_duration, 8), value: mr, mods: resCut, source: unit });
+      }
+      battle.fx('swordStorm', { x: unit.x, y: unit.y, id: unit.id });
+    };
+    const castS3 = (battle, unit) => {
+      if (!unit.alive || !unit.deployed) return;
+      talentAtk(battle, unit);
+      for (const e of targetsInGrid(battle, unit, g)) {
+        for (let i = 0; i < 2 && e.alive; i++) battle.dealDamage(unit, e, { amount: unit.s.atk * num(bb['appear.atk_scale'], 1.15), type: 'arts', isSkill: true, tags: ['skill', 'burst'] });
+        if (e.alive) battle.applyStatus(e, 'stun', { duration: num(bb['appear.stun'], 1.5), source: unit });
+      }
+      battle.fx('swordStorm', { x: unit.x, y: unit.y, id: unit.id });
+      unit.mem.rainUntil = battle.time + dur;
+      unit.mem.rainTimer?.cancel();
+      unit.mem.rainTimer = battle.every(Math.max(0.1, num(bb['texas2_s_3[sword].interval'], 1)), (b, sched) => {
+        if (!unit.alive || !unit.deployed || b.time > unit.mem.rainUntil + 1e-9) { sched.cancel(); return; }
+        const list = targetsInGrid(b, unit, g);
+        sortEnemyTargets(b, unit, list, null);
+        for (const e of list.slice(0, Math.max(1, Math.floor(num(bb.max_target, 2))))) {
+          b.dealDamage(unit, e, { amount: unit.s.atk * num(bb.atk_scale, 0.85), type: 'arts', isSkill: true, tags: ['skill', 'swordRain'] });
+          if (e.alive) b.applyStatus(e, 'stun', { duration: num(bb.stun, 0.2), source: unit });
+          b.fx('swordRain', { x: e.x, y: e.y, id: e.id });
+        }
+      }, { owner: unit });
+    };
+    const cast = S1 ? castS1 : S2 ? castS2 : castS3;
+    return {
+      skill: { kind: 'passive', onStart({ battle, unit }) { cast(battle, unit); } },
+      skills: alt(def, {
+        skchr_texas2_1: () => ({ kind: 'passive', onStart({ battle, unit }) { cast(battle, unit); } }),
+        skchr_texas2_2: () => ({ kind: 'passive', onStart({ battle, unit }) { cast(battle, unit); } }),
+      }),
+      // S2: 攻击变为二连击 while the passive lasts
+      trait: S2 ? { hitsFn: (b, u) => (u.findBuff('texas2:shower') ? 2 : 1) } : undefined,
+      talents: [
+        { install(battle, unit) { // 德克萨斯传统 (2nd half): first kill of each deployment ⇒ full heal + recast
+          // (the passive's deploy burst runs inside skill.reset, BEFORE the `deploy` hook: the per-deployment state is
+          // therefore reset when she leaves the field, so a kill by the deploy burst itself counts)
+          battle.on('death', (c) => { if (c.unit === unit) unit.mem.texasKilled = false; }, { owner: unit });
+          battle.on('kill', (c) => {
+            if (c.killer !== unit || !unit.alive || c.victim.side !== 'enemy' || unit.mem.texasKilled) return;
+            unit.mem.texasKilled = true;
+            battle.removeBuff(unit, 'texas2:swordplay');
+            battle.heal(unit, unit, unit.s.maxHp * num(t0.hp_ratio, 1), { self: true });
+            cast(battle, unit);
+          }, { owner: unit });
+        } },
+        { install(battle, unit) { // 德克萨斯剑术: until her first kill after each deployment: ASPD +8, −25 % damage taken
+          battle.on('deploy', (c) => {
+            if (c.unit !== unit || unit.mem.texasKilled) return; // the deploy burst may already have scored the kill
+            battle.addBuff(unit, { key: 'texas2:swordplay', mods: { aspd: num(t1.attack_speed, 8), dmgTakenMul: 1 - num(t1.damage_resistance, 0.25) } });
+          }, { owner: unit });
+        } },
+      ],
+      install(battle, unit) {
+        if (S1) {
+          // 攻击使命中目标失去特殊能力N秒，期间目标每秒受到X点法术伤害 (landed normal attacks while the passive lasts)
+          const sil = num(bb['attack@silence'], 5), dotDur = num(bb['attack@texas2_s_1[dot].duration'], sil);
+          const dot = num(bb['attack@texas2_s_1[dot].dot_damage'], 260), dotIv = Math.max(0.1, num(bb['attack@texas2_s_1[dot].interval'], 1));
+          battle.on('damaged', (c) => {
+            const e = c.target;
+            if (c.source !== unit || !c.dmg?.isAttack || e.side !== 'enemy' || !e.alive || !unit.findBuff('texas2:drizzle')) return;
+            battle.applyStatus(e, 'silence', { duration: sil, source: unit });
+            battle.addBuff(e, { key: `texas2:drizzleDot:${unit.id}`, duration: dotDur + 1e-6, interval: dotIv, source: unit, refresh: 'extend', // a re-hit refreshes it, the per-second ticks keep their rhythm
+              onTick: ({ unit: t }) => battle.dealDamage(unit, t, { amount: dot, type: 'arts', isSkill: true, tags: ['skill', 'dot'] }) });
+          }, { owner: unit });
+        }
+        if (S2) {
+          // 攻击…造成法术伤害 while the passive lasts (the double hit is the kit trait's hitsFn)
+          battle.on('hit', (c) => {
+            if (c.source === unit && c.dmg.isAttack && c.dmg.type === 'phys' && unit.findBuff('texas2:shower')) c.dmg.type = 'arts';
+          }, { owner: unit, priority: 50 });
+        }
+        const a = num(tb.atk, 0); // module (elite): ATK +10 % with no ally on the 4 adjacent tiles
+        if (!a) return;
+        whileDeployed(battle, unit, AURA, () => toggleBuff(battle, unit, 'texas2:module', lonely(battle, unit), { atkPct: a }));
+      },
+    };
+  },
+});
@@ -0,0 +1,50 @@
+// server/sim/content/kits/ops/chess_char_4_17-hsguma.js — 星熊 (char_136_hsguma) kit, tier 4.
+// Conventions of the tier-4 kits: ../shared/tier4.js; kit contract and rules: ../README.md.
+
+import { AURA, num, tbb, whileDeployed, pulse, toggleBuff, isSel, alt, withDefaults } from '../shared/tier4.js';
+
+export default withDefaults({
+  // ===== 星熊 (protector) S2 荆棘 (passive) — DEF +13 %, counters every attacker for 65 % ATK phys; talents
+  //       S1 战意 (TAKE_DAMAGE: DEF/ATK up); S3 力之锯 (ATK/DEF up, cuts every enemy on her front tile — all enemies of her
+  //       range); module PRO-X (护身符): DEF +20 % while blocking
+  chess_char_4_17_a: (bb, chess, def) => {
+    const t0 = tbb(def, 0), t1 = tbb(def, 1);
+    const tb = def.traitBb || {};
+    const S2 = isSel(def, 'skchr_hsguma_2');
+    return {
+      skills: alt(def, {
+        skchr_hsguma_1: () => ({ kind: 'duration', mods: { defPct: num(bb.def), atkPct: num(bb.atk) } }),
+        skchr_hsguma_3: () => ({
+          kind: 'duration',
+          mods: { atkPct: num(bb.atk), defPct: num(bb.def) },
+          targeting: { allInRange: true },
+          onStart({ battle, unit }) { battle.fx('overclock', { x: unit.x, y: unit.y, id: unit.id }); },
+        }),
+      }),
+      skill: { kind: 'passive', mods: { defPct: num(bb.def) } },
+      talents: [
+        { install(battle, unit) { // 战术装甲: 25 % 伤害抵挡 — negates an enemy phys/arts damage instance ("抵挡一次物理或法术伤害")
+          battle.on('hit', (c) => { // 抵挡 is target-side: a 无来源 burst (source null) counts via the enemy credited with it
+            const src = c.source || c.credit;
+            if (c.target !== unit || !src || src.side !== 'enemy' || c.dmg.cancel || (c.dmg.type !== 'phys' && c.dmg.type !== 'arts')) return;
+            if (battle.rng.chance(num(t0.prob, 0.25))) { c.dmg.cancel = true; battle.fx('block', { x: unit.x, y: unit.y, id: unit.id }); }
+          }, { owner: unit });
+        } },
+        { install(battle, unit) { // 特种作战策略: 重装 allies DEF +6 %
+          whileDeployed(battle, unit, AURA, () => { for (const a of battle.allies(unit.ownerId)) if (a.def?.profession === 'TANK') pulse(battle, a, 'hsguma:def', { defPct: num(t1.def, 0.06) }); });
+        } },
+      ],
+      install(battle, unit) {
+        const bd = num(tb.def, 0); // module PRO-X: 阻挡敌人时防御力+20%
+        if (bd) whileDeployed(battle, unit, 0.1, () => toggleBuff(battle, unit, 'hsguma:module', unit.blocking.length > 0, { defPct: bd }));
+        if (!S2) return;
+        battle.on('damaged', (c) => {
+          const src = c.source;
+          if (c.target !== unit || !unit.alive || !src || src.side !== 'enemy' || !src.alive || !c.dmg?.isAttack) return;
+          battle.dealDamage(unit, src, { amount: unit.s.atk * num(bb.atk_scale, 0.65), type: 'phys', canDodge: false, isSkill: true, tags: ['counter'] });
+          battle.fx('thorns', { x: unit.x, y: unit.y, id: unit.id });
+        }, { owner: unit });
+      },
+    };
+  },
+});
@@ -0,0 +1,101 @@
+// server/sim/content/kits/ops/chess_char_4_18-mudrok.js — 泥岩 (char_311_mudrok) kit, tier 4.
+// Conventions of the tier-4 kits: ../shared/tier4.js; kit contract and rules: ../README.md.
+
+import {
+  AURA, num, tbb, grid, batFlat, enemyHasTag, targetsInGrid, whileDeployed, pulse, toggleBuff, alt, lonely,
+  withDefaults,
+} from '../shared/tier4.js';
+
+export default withDefaults({
+  // ===== 泥岩 (unyield) S2 岩崩锤 — next attack: heal 4 %, 190 % phys to all ground enemies around, 30 % stun; talents
+  //       S1 防御力强化·γ型 (TAKE_DAMAGE); S3 秽壤的血脉 (10 s dormant — cannot act, takes no damage, keeps blocking —
+  //       with enemies around −60 % speed; then ground enemies around stunned 3 s/3.5 s and for the rest of the skill
+  //       BAT −0.3 s, ATK/DEF up, attacks every blocked enemy); module UNY-Y (沃土的愿景): ATK/DEF +8 % with no ally
+  //       on the 8 tiles around
+  chess_char_4_18_a: (bb, chess, def) => {
+    const t0 = tbb(def, 0), t1 = tbb(def, 1);
+    const tb = def.traitBb || {};
+    const g = grid(def.skill?.rangeGrid) || [[-1, -1], [-1, 0], [-1, 1], [0, -1], [0, 0], [0, 1], [1, -1], [1, 0], [1, 1]];
+    const sleep = num(bb.sleep, 10);
+    return {
+      skills: alt(def, {
+        'skcom_def_up[3]': () => ({ kind: 'duration', mods: { defPct: num(bb.def) } }),
+        skchr_mudrok_3: () => ({
+          kind: 'duration',
+          attack: { hitAllBlocked: true },
+          onStart({ battle, unit }) {
+            unit.mem.mudS3 = { awake: false, t: 0 };
+            battle.addBuff(unit, { key: 'mudrok:dormant', duration: sleep + 1, flags: { invulnerable: true, disarm: true }, visible: true });
+            battle.fx('stone', { x: unit.x, y: unit.y, id: unit.id });
+          },
+          onTick({ battle, unit, dt }) {
+            const M = unit.mem.mudS3;
+            if (!M || M.awake) return;
+            M.t += dt;
+            for (const e of targetsInGrid(battle, unit, g)) pulse(battle, e, `mudrok:slow:${unit.id}`, { moveMul: Math.max(0, 1 + num(bb.move_speed, -0.6)) });
+            if (M.t + 1e-9 < sleep) return;
+            M.awake = true;
+            battle.removeBuff(unit, 'mudrok:dormant');
+            for (const e of targetsInGrid(battle, unit, g)) if (!e.isFlying && e.alive) battle.applyStatus(e, 'stun', { duration: num(bb.stun, 3), source: unit });
+            battle.addBuff(unit, { key: 'mudrok:awake', mods: { atkPct: num(bb.atk), defPct: num(bb.def), batPct: batFlat(def, bb.base_attack_time) } });
+            battle.fx('rockfall', { x: unit.x, y: unit.y, id: unit.id });
+          },
+          onEnd({ battle, unit }) {
+            unit.mem.mudS3 = null;
+            battle.removeBuff(unit, 'mudrok:dormant');
+            battle.removeBuff(unit, 'mudrok:awake');
+          },
+        }),
+      }),
+      skill: {
+        kind: 'instant',
+        targeting: { rangeGrid: g, allInRange: true, canHitFly: false },
+        attack: {
+          atkScale: num(bb.atk_scale, 1.9), groundOnly: true,
+          onHit({ battle, unit, target }) {
+            if (target && target.alive && battle.rng.chance(num(bb.buff_prob, 0.3))) battle.applyStatus(target, 'stun', { duration: num(bb.stun, 0.5), source: unit });
+          },
+        },
+        onStart({ battle, unit }) {
+          battle.heal(unit, unit, unit.s.maxHp * num(bb.hp_ratio, 0.04), { self: true });
+          battle.fx('rockslide', { x: unit.x, y: unit.y, id: unit.id });
+        },
+      },
+      talents: [
+        { install(battle, unit) { // 沃土予身: a hit-negating layer every 9 s (≤ 3, 1 on deploy); each broken layer heals 20 %
+          const setLayers = (n) => {
+            unit.mem.layers = n;
+            if (n > 0) battle.addBuff(unit, { key: 'mudrok:layers', shieldHits: n, visible: true });
+            else battle.removeBuff(unit, 'mudrok:layers');
+          };
+          battle.on('deploy', (c) => {
+            if (c.unit !== unit) return;
+            setLayers(Math.min(num(t0.max_times, 3), num(t0.times, 1)));
+            unit.mem.layerTimer?.cancel();
+            unit.mem.layerTimer = whileDeployed(battle, unit, num(t0.interval, 9), () => {
+              if ((unit.mem.layers ?? 0) < num(t0.max_times, 3)) setLayers(Math.min(num(t0.max_times, 3), (unit.mem.layers ?? 0) + num(t0.times, 1)));
+            });
+          }, { owner: unit });
+          battle.on('damaged', (c) => {
+            if (c.target !== unit || !unit.alive) return;
+            const left = unit.findBuff('mudrok:layers')?.shieldHits ?? 0;
+            const broken = (unit.mem.layers ?? 0) - left;
+            if (broken <= 0) return;
+            unit.mem.layers = left;
+            battle.heal(unit, unit, unit.s.maxHp * num(t0.hp_ratio, 0.2) * broken, { self: true });
+            battle.fx('shieldBreak', { x: unit.x, y: unit.y, id: unit.id });
+          }, { owner: unit });
+        } },
+        { install(battle, unit) { // 手足相惜: −30 % damage from 萨卡兹 enemies
+          battle.on('hit', (c) => { if (c.target === unit && enemyHasTag(c.source, 'sarkaz')) c.dmg.mul *= 1 - num(t1.damage_resistance, 0.3); }, { owner: unit });
+        } },
+      ],
+      install(battle, unit) {
+        const ds = num(tb.damage_scale, 0); // module (elite): −15 % damage from enemies it blocks
+        if (ds > 0) battle.on('hit', (c) => { if (c.target === unit && c.source && c.source.blockedBy === unit) c.dmg.mul *= ds; }, { owner: unit });
+        const ma = num(tb.atk, 0), md = num(tb.def, 0); // module UNY-Y: 周围8格没有友方干员时攻击力和防御力+8%
+        if (ma || md) whileDeployed(battle, unit, AURA, () => toggleBuff(battle, unit, 'mudrok:module', lonely(battle, unit, true), { atkPct: ma, defPct: md }));
+      },
+    };
+  },
+});
@@ -0,0 +1,118 @@
+// server/sim/content/kits/ops/chess_char_4_19-flamtl.js — 焰尾 (char_420_flamtl) kit, tier 4.
+// Conventions of the tier-4 kits: ../shared/tier4.js; kit contract and rules: ../README.md.
+
+import { canTargetEnemy, sortEnemyTargets } from '../../../targeting.js';
+import {
+  AURA, num, tbb, grid, nationOf, targetsInGrid, whileDeployed, pulse, toggleBuff, skillActive, isSel, alt,
+  withDefaults,
+} from '../shared/tier4.js';
+
+export default withDefaults({
+  // ===== 焰尾 (pioneer) S3 焰心 — 8 DP over the skill, faster, +ATK, block +1, 60 % dodge; talents 前锋剑术 / 红松骑士团团长
+  //       S1 迅敏直觉 (+6 DP, dodges the next physical attack); S2 “红松林” (+11/12 DP; ≤ 6 enemies around: 2 × 180 %/210 %
+  //       phys + 0.5 s stun, air units too — PRTS 备注 "※可对空"; allies around +40 %/45 % physical dodge for 10 s);
+  //       module SOL-X (她们的未来): ATK/DEF +8 % while blocking. Her dodges (any source) feed talent 前锋剑术.
+  chess_char_4_19_a: (bb, chess, def) => {
+    const t1 = tbb(def, 1);
+    const tb = def.traitBb || {};
+    const total = Math.max(0, Math.floor(num(bb.value, 8))), per = num(bb.cost, 1);
+    const p = num(bb.prob, 0.6);
+    const S1 = isSel(def, 'skchr_flamtl_1'), S3 = isSel(def, 'skchr_flamtl_3');
+    const g = grid(def.skill?.rangeGrid);
+    return {
+      skills: alt(def, {
+        // (自动触发: an AUTO skill takes no 技能策略 — an AUTO DP skill fires as soon as it is ready, like 伺夜 S1)
+        skchr_flamtl_1: () => ({
+          kind: 'instant',
+          trigger: 'SP_FULL',
+          onStart({ battle, unit }) {
+            battle.addDp(unit.ownerId, num(bb.cost, 6));
+            battle.addBuff(unit, { key: 'flamtl:evade', visible: true });
+            battle.fx('dp', { x: unit.x, y: unit.y, id: unit.id, n: num(bb.cost, 6) });
+          },
+        }),
+        skchr_flamtl_2: () => ({
+          kind: 'instant',
+          onStart({ battle, unit }) {
+            battle.addDp(unit.ownerId, num(bb.cost, 11));
+            const area = g || [[0, 0], [0, 1]];
+            const foes = targetsInGrid(battle, unit, area);
+            sortEnemyTargets(battle, unit, foes, null);
+            for (const e of foes.slice(0, Math.max(1, Math.floor(num(bb.max_target, 6))))) {
+              for (let i = 0; i < 2 && e.alive; i++) battle.dealDamage(unit, e, { amount: unit.s.atk * num(bb.atk_scale, 1.8), type: 'phys', isSkill: true, tags: ['skill', 'redPine'] });
+              if (e.alive) battle.applyStatus(e, 'stun', { duration: num(bb.stun, 0.5), source: unit });
+            }
+            for (const a of battle.unitsInGrid(unit, area, { side: 'ally' })) {
+              if (a.kind === 'device' || !battle.allySelectable(a, unit)) continue;
+              battle.addBuff(a, { key: 'flamtl:redPine', duration: num(bb['flamtl_s_2.duration'], 10), mods: { dodgePhys: num(bb['flamtl_s_2.prob'], 0.4) }, visible: true, source: unit });
+            }
+            battle.fx('aoe', { x: unit.x, y: unit.y, id: unit.id });
+          },
+        }),
+      }),
+      skill: {
+        kind: 'duration',
+        // the 60 % dodge is rolled on its own in the `hit` hook below (independent of other dodge sources such as her
+        // talent's 22 %: 1 − (1−p)(1−q), never an additive 80 % + 22 % = 100 % immunity)
+        mods: { atkPct: num(bb.atk), batPct: Math.max(-0.9, num(bb.base_attack_time, 1) - 1), blockCnt: num(bb.block_cnt, 1) },
+        onStart({ battle, unit, skill }) { unit.mem.flame = { acc: 0, given: 0, step: skill.duration / Math.max(1, total) }; battle.fx('flame', { x: unit.x, y: unit.y, id: unit.id }); },
+        onTick({ battle, unit, dt }) {
+          const F = unit.mem.flame;
+          if (!F) return;
+          F.acc += dt;
+          while (F.acc + 1e-9 >= F.step && F.given < total) { F.acc -= F.step; F.given++; battle.addDp(unit.ownerId, per); }
+        },
+        onEnd({ battle, unit, reason }) {
+          const F = unit.mem.flame;
+          unit.mem.flame = null;
+          if (F && reason === 'duration' && F.given < total) battle.addDp(unit.ownerId, per * (total - F.given));
+        },
+      },
+      install(battle, unit) {
+        if (S1) {
+          battle.on('hit', (c) => { // S1: "闪避下次物理攻击"
+            const d = c.dmg;
+            if (c.target !== unit || d.cancel || d.type !== 'phys' || !d.isAttack || !c.source || c.source.side !== 'enemy' || !unit.findBuff('flamtl:evade')) return;
+            battle.removeBuff(unit, 'flamtl:evade');
+            d.cancel = true;
+            battle.fx('dodge', { x: unit.x, y: unit.y, id: unit.id });
+            battle.emit('dodge', { source: c.source, target: unit, dmg: d });
+          }, { owner: unit, priority: 20 });
+        }
+        const ma = num(tb.atk, 0), md = num(tb.def, 0); // module SOL-X: 阻挡敌人时攻击力和防御力各+8%
+        if (ma || md) whileDeployed(battle, unit, 0.1, () => toggleBuff(battle, unit, 'flamtl:module', unit.blocking.length > 0, { atkPct: ma, defPct: md }));
+        if (!S3) return;
+        battle.on('hit', (c) => { // S3: "获得60%的物理和法术闪避"
+          const d = c.dmg;
+          if (c.target !== unit || !skillActive(unit) || d.cancel || !d.canDodge || (d.type !== 'phys' && d.type !== 'arts')) return;
+          if (!battle.rng.chance(p)) return;
+          d.cancel = true;
+          battle.fx('dodge', { x: unit.x, y: unit.y, id: unit.id });
+          battle.emit('dodge', { source: c.source, target: unit, dmg: d });
+        }, { owner: unit, priority: 20 });
+      },
+      talents: [
+        { install(battle, unit) { // 前锋剑术: after a dodge the next attack hits twice and every blocked enemy
+          battle.on('dodge', (c) => { if (c.target === unit) unit.mem.riposte = true; }, { owner: unit });
+          battle.on('death', (c) => { if (c.unit === unit) unit.mem.riposte = unit.mem.riposteNow = false; }, { owner: unit });
+          battle.on('beforeAttack', (c) => {
+            if (c.attacker !== unit || !unit.mem.riposte) return;
+            unit.mem.riposte = false;
+            unit.mem.riposteNow = true;
+            const extra = unit.blocking.filter((e) => e.alive && canTargetEnemy(unit, e, c.profile) && !c.targets.includes(e));
+            c.targets = [...c.targets, ...extra];
+          }, { owner: unit });
+          battle.on('attack', (c) => {
+            if (c.attacker !== unit || !unit.mem.riposteNow) return;
+            unit.mem.riposteNow = false;
+            for (const e of c.targets) if (e.alive) battle.dealDamage(unit, e, { amount: unit.s.atk * unit.s.atkScaleMul, type: 'phys', isAttack: true, tags: ['riposte'] });
+            battle.fx('riposte', { x: unit.x, y: unit.y, id: unit.id });
+          }, { owner: unit });
+        } },
+        { install(battle, unit) { // 红松骑士团团长: 卡西米尔 operators +22 % physical dodge
+          whileDeployed(battle, unit, AURA, () => { for (const a of battle.allies(unit.ownerId)) if (nationOf(a) === 'kazimierz') pulse(battle, a, 'flamtl:dodge', { dodgePhys: num(t1.prob, 0.22) }); });
+        } },
+      ],
+    };
+  },
+});
@@ -0,0 +1,91 @@
+// server/sim/content/kits/ops/chess_char_4_20-fartth.js — 远牙 (char_430_fartth) kit, tier 4.
+// Conventions of the tier-4 kits: ../shared/tier4.js; kit contract and rules: ../README.md.
+
+import { COLS } from '../../../constants.js';
+import { bodyInKeys } from '../../../body.js';
+import { absoluteRangeKeys, sortEnemyTargets } from '../../../targeting.js';
+import { isHpLoss } from '../../../damage.js';
+import { num, tbb, whileDeployed, toggleBuff, skillActive, isSel, alt, withDefaults } from '../shared/tier4.js';
+
+const LINE = Object.freeze(Array.from({ length: COLS }, (_, i) => Object.freeze([0, i])));
+const tileKey = (u) => Math.round(u.y) * COLS + Math.round(u.x);
+/** HP at 0 (boss pool: pool HP) — a `damaged` hook sees the lethal hit before the kill, while the unit is still `alive`. */
+const downed = (u) => (u.bossPool ? !(u.bossPool.hp > 0) : !(u.hp > 0));
+
+export default withDefaults({
+  // ===== 远牙 (longrange) S3 光羽箭 — infinite line, +ATK, ×1.25 beyond the normal range; talents 凝神 / 屏息; module
+  //       S1 迅捷打击·γ型; S2 同盟支援 (ASPD up; enemies blocked by any ally anywhere on the field are in range — their
+  //       tiles are extra range keys while the skill runs). Talent 屏息 (taunt −1, ignores dodge) covers every skill.
+  //       Module DEA-Y (支持者来信): +1 SP when an attacked enemy survives the hit
+  chess_char_4_20_a: (bb, chess, def) => {
+    const t0 = tbb(def, 0), t1 = tbb(def, 1);
+    const tb = def.traitBb || {};
+    const S3 = isSel(def, 'skchr_fartth_3');
+    const taunt = num(t1.taunt_level, -1);
+    const setAllied = (battle, unit, keys) => {
+      const sig = keys ? keys.join(',') : '';
+      if (sig === (unit.mem.alliedSig ?? '')) return;
+      unit.mem.alliedSig = sig;
+      battle.setExtraRange(unit, keys);
+    };
+    return {
+      skills: alt(def, {
+        'skcom_quickattack[3]': () => ({ kind: 'duration', mods: { atkPct: num(bb.atk), aspd: num(bb.attack_speed), taunt } }),
+        skchr_fartth_2: () => ({
+          kind: 'duration',
+          mods: { aspd: num(bb.attack_speed), taunt },
+          onStart({ battle, unit }) { battle.fx('link', { x: unit.x, y: unit.y, id: unit.id }); },
+          onTick({ battle, unit }) {
+            const keys = [];
+            for (const e of battle.enemies) if (e.alive && !e.hidden && e.blockedBy && e.blockedBy.side === 'ally' && e.blockedBy.alive) keys.push(tileKey(e));
+            keys.sort((a, b) => a - b);
+            setAllied(battle, unit, keys.length ? keys : null);
+          },
+          onEnd({ battle, unit }) { setAllied(battle, unit, null); },
+        }),
+      }),
+      skill: { kind: 'duration', mods: { atkPct: num(bb.atk), taunt: num(t1.taunt_level, -1) }, targeting: { rangeGrid: LINE },
+        onStart({ battle, unit }) { battle.fx('featherArrow', { x: unit.x, y: unit.y, id: unit.id }); } },
+      talents: [
+        { install(battle, unit) { // 凝神: ATK +15 % when not hurt for 10 s
+          battle.on('damaged', (c) => { if (c.target === unit && c.amount > 0 && !isHpLoss(c.dmg)) unit.mem.lastHurt = battle.time; }, { owner: unit }); // (a 流失 is not 受伤害)
+          battle.on('deploy', (c) => { if (c.unit === unit) unit.mem.lastHurt = -Infinity; }, { owner: unit });
+          whileDeployed(battle, unit, 0.1, () => toggleBuff(battle, unit, 'fartth:focus', battle.time - (unit.mem.lastHurt ?? -Infinity) >= num(t0.delay, 10) - 1e-9, { atkPct: num(t0.atk, 0.15) }));
+        } },
+        { install(battle, unit) { // 屏息 (2nd half): skill attacks ignore physical dodge
+          battle.on('hit', (c) => { if (c.source === unit && skillActive(unit) && c.dmg.type === 'phys') c.dmg.canDodge = false; }, { owner: unit });
+        } },
+      ],
+      install(battle, unit) {
+        if (isSel(def, 'skchr_fartth_2')) {
+          // 同盟支援 reaches BLOCKED enemies outside her range only: the blocked enemies' tiles are extra range keys, so an
+          // unblocked enemy (a flyer…) standing on such a tile outside her own range is dropped for the next valid target
+          battle.on('beforeAttack', (c) => {
+            if (c.attacker !== unit || !skillActive(unit) || !unit.extraRangeKeys) return;
+            const own = new Set(absoluteRangeKeys(unit.rangeGrid, unit.tileR, unit.tileC, unit.dir, unit.s.rangeExtend));
+            const ok = (e) => bodyInKeys(e, own) || !!(e.blockedBy && e.blockedBy.side === 'ally' && e.blockedBy.alive);
+            if (c.targets.every(ok)) return;
+            const cands = battle.enemiesInKeys(unit.rangeKeys, unit, c.profile);
+            for (const e of battle.blockedTargets(unit, c.profile)) if (!cands.includes(e)) cands.push(e); // DESIGN §20.3
+            for (let i = cands.length - 1; i >= 0; i--) if (!ok(cands[i])) cands.splice(i, 1);
+            sortEnemyTargets(battle, unit, cands, c.profile?.priority ?? null);
+            c.targets = cands.slice(0, Math.max(1, c.targets.length));
+          }, { owner: unit, priority: 5 });
+        }
+        const sp = num(tb.sp, 0); // module DEA-Y: 攻击的敌人未被击倒时自身额外获得1点技力
+        if (sp > 0) {
+          // (`damaged` fires before the kill: a lethal hit leaves the target `alive` with 0 HP — that one gives no SP)
+          battle.on('damaged', (c) => {
+            if (c.source === unit && c.dmg?.isAttack && !c.dmg.isSplash && c.target.side === 'enemy' && c.target.alive && !downed(c.target)) unit.skill?.gainSp(sp, 'module');
+          }, { owner: unit });
+        }
+        const ds = num(tb.damage_scale, 0), lo = num(tb.min_dist, 1), hi = num(tb.max_dist, 4.5);
+        battle.on('hit', (c) => {
+          if (c.source !== unit || !c.dmg.isAttack) return;
+          if (S3 && skillActive(unit) && unit.baseRangeKeys && !bodyInKeys(c.target, unit.baseRangeKeys)) c.dmg.mul *= num(bb.damage_scale, 1.25);
+          if (ds > 0) { const d = Math.hypot(c.target.x - unit.x, c.target.y - unit.y); c.dmg.mul *= 1 + ds * Math.max(0, Math.min(1, (d - lo) / Math.max(1e-6, hi - lo))); }
+        }, { owner: unit });
+      },
+    };
+  },
+});
@@ -0,0 +1,19 @@
+// server/sim/content/kits/ops/chess_char_4_21-plosis.js — 白面鸮 (char_128_plosis) kit, tier 4.
+// Conventions of the tier-4 kits: ../shared/tier4.js; kit contract and rules: ../README.md.
+
+import { num, tbb, grid, batFlat, spAura, alt, applyModuleRange, withDefaults } from '../shared/tier4.js';
+
+export default withDefaults({
+  // ===== 白面鸮 (ringhealer) S2 脑啡肽 — wider range, much faster heals; talent 技力光环 (+0.3 SP/s to all allies)
+  chess_char_4_21_a: (bb, chess, def) => {
+    const t0 = tbb(def, 0);
+    const g = grid(def.skill?.rangeGrid);
+    return {
+      skills: alt(def, { 'skcom_heal_up[3]': () => ({ kind: 'duration', heal: true, mods: { atkPct: num(bb.atk) } }) }), // S1 治疗强化·γ型
+      skill: { kind: 'duration', heal: true, mods: { batPct: batFlat(def, bb.base_attack_time) }, targeting: g ? { rangeGrid: g } : undefined,
+        onStart({ battle, unit }) { battle.fx('healField', { x: unit.x, y: unit.y, id: unit.id }); } },
+      talents: [{ install(battle, unit) { spAura(battle, unit, num(t0.sp_recovery_per_sec, 0.3), (a) => a.kind !== 'device'); } }],
+      install(battle, unit) { applyModuleRange(battle, unit, def); }, // module RIN-X (elite default): 攻击范围扩大
+    };
+  },
+});
@@ -0,0 +1,52 @@
+// server/sim/content/kits/ops/chess_char_4_22-svrash.js — 银灰 (char_172_svrash) kit, tier 4.
+// Conventions of the tier-4 kits: ../shared/tier4.js; kit contract and rules: ../README.md.
+
+import {
+  AURA, num, tbb, grid, enemiesOnRange, whileDeployed, reveal, alt, instantKind, withDefaults,
+} from '../shared/tier4.js';
+
+export default withDefaults({
+  // ===== 银灰 (lord) S3 真银斩 — DEF −70 %, ATK +125 %, wider range, ≤ 4 targets at melee scale; 领袖 / 鹰眼视觉; module
+  //       S1 强力击·γ型 (attack SP: next attack 205 %/225 %); S2 雪境生存法则 (toggle — [ASSUMED] once switched on it stays
+  //       on for the deployment: smaller range, DEF up, 3.5 %/4 % max HP regen per s)
+  chess_char_4_22_a: (bb, chess, def) => {
+    const t0 = tbb(def, 0);
+    const tb = def.traitBb || {};
+    const g = grid(def.skill?.rangeGrid);
+    return {
+      skills: alt(def, {
+        skchr_svrash_1: () => ({ kind: instantKind(def), attack: { atkScale: num(bb.atk_scale, 2.05) } }),
+        skchr_svrash_2: () => ({
+          kind: 'toggle',
+          mods: { defPct: num(bb.def), hpRegenRatio: num(bb.hp_recovery_per_sec_by_max_hp_ratio) },
+          targeting: g ? { rangeGrid: g } : undefined,
+          onStart({ battle, unit }) { battle.fx('snow', { x: unit.x, y: unit.y, id: unit.id }); },
+        }),
+      }),
+      skill: {
+        kind: 'duration',
+        mods: { defPct: num(bb.def), atkPct: num(bb.atk) },
+        targeting: { ...(g ? { rangeGrid: g } : {}), maxTargets: Math.max(1, Math.floor(num(bb['attack@max_target'], 4))) },
+        attack: { projectile: 'none', dmgMul: () => 1 },       // 视为近距离攻击: no ranged ×0.8
+        onStart({ battle, unit }) { battle.fx('truesilver', { x: unit.x, y: unit.y, id: unit.id }); },
+        onAttack({ battle, unit }) { battle.fx('slash', { x: unit.x, y: unit.y, id: unit.id }); },
+      },
+      talents: [
+        { install(battle, unit) { // 领袖: ATK +10 %; every unit of the team redeploys 10 % faster
+          battle.addBuff(unit, { key: 'svrash:t1', mods: { atkPct: num(t0.atk, 0.1) }, persist: true, allowDead: true });
+          const p = battle.getPlayer(unit.ownerId);
+          for (const a of p ? p.units : []) if (a.kind === 'op') battle.addBuff(a, { key: 'svrash:leader', mods: { redeployMul: Math.max(0, 1 + num(t0.respawn_time, -0.1)) }, persist: true, allowDead: true });
+        } },
+        { install(battle, unit) { whileDeployed(battle, unit, AURA, () => reveal(battle, enemiesOnRange(battle, unit))); } }, // 鹰眼视觉
+      ],
+      install(battle, unit) {
+        const m = num(tb.atk_scale_m, 0); // module (elite): attacks add 10 % ATK arts damage
+        if (!(m > 0)) return;
+        battle.on('damaged', (c) => {
+          if (c.source !== unit || !c.dmg?.isAttack || c.type !== 'phys' || !c.target.alive || c.target.side !== 'enemy') return;
+          battle.dealDamage(unit, c.target, { amount: unit.s.atk * m, type: 'arts', tags: ['module'] });
+        }, { owner: unit });
+      },
+    };
+  },
+});
@@ -0,0 +1,78 @@
+// server/sim/content/kits/ops/chess_char_4_23-gvial2.js — 百炼嘉维尔 (char_1026_gvial2) kit, tier 4.
+// Conventions of the tier-4 kits: ../shared/tier4.js; kit contract and rules: ../README.md.
+
+import {
+  num, tbb, grid, whileDeployed, toggleBuff, skillActive, isSel, alt, pullToFront, withDefaults,
+} from '../shared/tier4.js';
+
+export default withDefaults({
+  // ===== 百炼嘉维尔 (centurion) S3 丛林之魂 — ATK/ASPD/block up, takes 50 % now, the rest as 20 s HP loss; talents; module
+  //       S1 精准痛击 (ATK up, heals herself 30 %/35 % of the damage dealt); S2 链锯强袭 (wider range, ATK/DEF up, pulls
+  //       unblocked enemies it hits to her front); module CEN-Y (好锯多磨): −20 % physical damage taken above 50 % HP
+  chess_char_4_23_a: (bb, chess, def) => {
+    const t0 = tbb(def, 0), t1 = tbb(def, 1);
+    const tb = def.traitBb || {};
+    const dr = Math.max(0, Math.min(0.99, num(bb.damage_resistance, 0.5)));
+    const fin = num(bb.final_duration, 20), iv = Math.max(1 / 30, num(bb.interval, 0.1));
+    const S3 = isSel(def, 'skchr_gvial2_3');
+    const g = grid(def.skill?.rangeGrid);
+    return {
+      skills: alt(def, {
+        skchr_gvial2_1: () => ({
+          kind: 'duration',
+          mods: { atkPct: num(bb.atk) },
+          onHit({ battle, unit, dealt }) { if (dealt > 0 && unit.alive) battle.heal(unit, unit, dealt * num(bb.heal_scale, 0.3), { self: true }); },
+        }),
+        skchr_gvial2_2: () => ({
+          kind: 'duration',
+          mods: { atkPct: num(bb.atk), defPct: num(bb.def) },
+          targeting: g ? { rangeGrid: g } : undefined,
+          attack: { onEachHit({ battle, unit, target }) { if (target && target.alive && !target.blockedBy) pullToFront(battle, unit, target, num(bb['attack@force'], 1)); } },
+          onStart({ battle, unit }) { battle.fx('overload', { x: unit.x, y: unit.y, id: unit.id }); },
+        }),
+      }),
+      skill: {
+        kind: 'duration',
+        mods: { atkPct: num(bb.atk), aspd: num(bb.attack_speed), blockCnt: num(bb.block_cnt, 2) },
+        onStart({ battle, unit }) { unit.mem.gvialDebt = 0; battle.fx('jungleSoul', { x: unit.x, y: unit.y, id: unit.id }); },
+        onEnd({ battle, unit, reason }) {
+          const debt = unit.mem.gvialDebt ?? 0;
+          unit.mem.gvialDebt = 0;
+          if (reason === 'death' || !unit.alive || !(debt > 0)) return;
+          const per = debt * iv / fin;
+          battle.addBuff(unit, { key: 'gvial:bleed', refresh: 'independent', maxStacks: 10, duration: fin + 1e-6, interval: iv, visible: true,
+            onTick: ({ unit: u }) => battle.loseHp(u, per) });
+        },
+      },
+      talents: [
+        { install(battle, unit) { // 战地巨斧: ATK/DEF +10 %, +4 % per extra blocked enemy
+          whileDeployed(battle, unit, 0.1, () => {
+            const extra = Math.max(0, unit.blocking.length - 1);
+            toggleBuff(battle, unit, 'gvial:t1', true, { atkPct: num(t0.atk, 0.1) + num(t0.atk_add, 0.04) * extra, defPct: num(t0.def, 0.1) + num(t0.def_add, 0.04) * extra });
+          });
+        } },
+        { install(battle, unit) { // 医学背景: healing received +20 %, +40 % below half HP
+          battle.on('heal', (c) => { if (c.target === unit) c.amount *= unit.hpRatio < num(t1.hp_ratio, 0.5) ? num(t1.heal_scale_2, 1.4) : num(t1.heal_scale_1, 1.2); }, { owner: unit });
+        } },
+      ],
+      install(battle, unit) {
+        const s = num(tb.atk_scale, 0); // module (elite): ×1.1 against blocked enemies
+        if (s > 0) battle.on('hit', (c) => { if (c.source === unit && c.dmg.isAttack && c.target.blockedBy === unit) c.dmg.mul *= s; }, { owner: unit });
+        const yr = num(tb.hp_ratio, 0), yd = num(tb.damage_resistance, 0); // module CEN-Y: 生命值高于50%时受到的物理伤害降低20%
+        if (yr > 0 && yd > 0) battle.on('hit', (c) => { if (c.target === unit && c.dmg.type === 'phys' && unit.hpRatio > yr) c.dmg.mul *= 1 - yd; }, { owner: unit });
+        if (!S3) return;
+        const deferred = new WeakSet();
+        battle.on('hit', (c) => {
+          if (c.target !== unit || !skillActive(unit)) return;
+          c.dmg.mul *= 1 - dr;
+          deferred.add(c.dmg);
+        }, { owner: unit, priority: -5 });
+        battle.on('damaged', (c) => {
+          if (c.target !== unit || !deferred.has(c.dmg)) return;
+          deferred.delete(c.dmg);
+          if (c.amount > 0) unit.mem.gvialDebt = (unit.mem.gvialDebt ?? 0) + (c.amount * dr) / (1 - dr);
+        }, { owner: unit });
+      },
+    };
+  },
+});
@@ -0,0 +1,148 @@
+// server/sim/content/kits/ops/chess_char_4_24-billro.js — 卡涅利安 (char_426_billro) kit, tier 4.
+// Conventions of the tier-4 kits: ../shared/tier4.js; kit contract and rules: ../README.md.
+
+import {
+  num, tbb, moduleBb, grid, batFlat, enemiesOnRange, whileDeployed, toggleBuff, skillActive, isSel, alt, withDefaults,
+} from '../shared/tier4.js';
+
+/** 卡涅利安 S3 食噬之印: the ATK bonus climbs in 1 s steps over 20 s (PRTS 备注; the blackboard has no ramp time). */
+const BILLRO_S3_RAMP = 20;
+/** 卡涅利安 S3 charged mark: one buff per enemy, shared by every 卡涅利安 (PRTS 备注), ≤ 5 stacks (skill text). */
+const BILLRO_MARK = 'billro:mark';
+const BILLRO_MARK_MAX = 5;
+
+export default withDefaults({
+  // ===== 卡涅利安 (phalanx) S2 沙缚镣锁 — faster attacks on every enemy in range (the trait's 群体法术伤害), 0.3 s
+  //       sluggish on each; charged: ATK +10 % and bind; talents
+  //       S1 沙暴守卫 (SEARCH: ATK/DEF up; charged — cast with every charge stored — "特性效果在技能期间继续生效", PRTS 备注
+  //       "应用蓄力时：应用技能未开启时的特性": the skill-off trait stays in force, the DEF/RES guard AND 不攻击 — she makes
+  //       no attack until the skill ends, a pure guard);
+  //       S3 食噬之印 (wider range, ATK +0 % → +140 %/+200 % in 1 s steps over 20 s — PRTS 备注; charged: each attack adds a
+  //       stack of the mark BEFORE its damage — PRTS 备注 "于攻击造成伤害前生效，多层效果之间加算叠加" — +20 % damage from
+  //       her per stack, ≤ 5, so ×1.2 on the first hit and ×2.0 from the 5th, until the skill ends; one mark per enemy:
+  //       another 卡涅利安 only adds stacks to it, the bonus is the setter's — PRTS 备注 popup). Talent 生命之餐 heals on
+  //       every skill; module PLX-X keeps part of the guard during any skill, PLX-Y (乡音): +3 % damage per enemy in range
+  //       (≤ 5)
+  chess_char_4_24_a: (bb, chess, def) => {
+    const t0 = tbb(def, 0), t1 = tbb(def, 1), mb = moduleBb(def);
+    const tb = def.traitBb || {};
+    const keepDef = num(tb['billro_e_002[buff].def'], 0), keepRes = num(tb['billro_e_002[buff].magic_resistance'], 0);
+    const S1 = isSel(def, 'skchr_billro_1'), S2 = isSel(def, 'skchr_billro_2'), S3 = isSel(def, 'skchr_billro_3');
+    const g = grid(def.skill?.rangeGrid);
+    const isCharged = (skill) => skill.maxCharges > 1 && skill.charges + 1 >= skill.maxCharges; // cast with every charge stored
+    return {
+      // charged S1: the skill-off trait's 不攻击 stays in force while the skill lasts (PRTS S1 备注) — no attack at all
+      trait: S1 ? { canAttack: (battle, u) => !(skillActive(u) && u.mem.billroCharged) } : null,
+      skills: alt(def, {
+        skchr_billro_1: () => ({
+          kind: 'duration',
+          mods: { atkPct: num(bb.atk), defPct: num(bb.def) },
+          onStart({ battle, unit, skill }) {
+            unit.mem.billroCharged = isCharged(skill);
+            // 蓄力额外效果：特性效果在技能期间继续生效 (the profession removes its own guard buff when a skill starts; the
+            // kit trait's canAttack keeps the trait's 不攻击)
+            if (unit.mem.billroCharged) battle.addBuff(unit, { key: 'billro:s1guard', mods: { defPct: num(unit.profile?.guardDef, 2), resFlat: num(unit.profile?.guardRes, 20) } });
+            battle.fx('shell', { x: unit.x, y: unit.y, id: unit.id });
+          },
+          onEnd({ battle, unit }) { unit.mem.billroCharged = false; battle.removeBuff(unit, 'billro:s1guard'); },
+        }),
+        skchr_billro_3: () => ({
+          kind: 'duration',
+          targeting: g ? { rangeGrid: g } : undefined,
+          onStart({ battle, unit, skill }) {
+            unit.mem.billroCharged = isCharged(skill);
+            unit.mem.billroRamp = 0;
+            unit.mem.billroMarked = new Set();
+            battle.addBuff(unit, { key: 'billro:s3atk', mods: { atkPct: 0 } });
+            battle.fx('devour', { x: unit.x, y: unit.y, id: unit.id });
+          },
+          onTick({ unit, dt }) { // 攻击力逐渐增至+N%: PRTS 备注 "从+0%开始在20秒内线性增加，攻击力每1秒更新1次"
+            unit.mem.billroRamp = (unit.mem.billroRamp ?? 0) + dt;
+            const steps = Math.min(BILLRO_S3_RAMP, Math.floor(unit.mem.billroRamp + 1e-9));
+            const b = unit.findBuff('billro:s3atk');
+            if (b && b.mods.atkPct !== num(bb.atk) * steps / BILLRO_S3_RAMP) { b.mods = { atkPct: num(bb.atk) * steps / BILLRO_S3_RAMP }; unit.markDirty(); }
+          },
+          onEnd({ battle, unit }) {
+            battle.removeBuff(unit, 'billro:s3atk');
+            // "持续至技能结束": the marks she set end with her skill (stacks another 卡涅利安 added to them included)
+            for (const id of unit.mem.billroMarked || []) {
+              const e = battle.unitById(id);
+              if (e && e.findBuff(BILLRO_MARK)?.source === unit) battle.removeBuff(e, BILLRO_MARK);
+            }
+            unit.mem.billroMarked = null;
+            unit.mem.billroCharged = false;
+          },
+        }),
+      }),
+      skill: {
+        kind: 'duration',
+        mods: { batPct: batFlat(def, bb.base_attack_time) },
+        onStart({ battle, unit, skill }) {
+          const charged = isCharged(skill);
+          unit.mem.billroCharged = charged;
+          if (charged) battle.addBuff(unit, { key: 'billro:charged', mods: { atkPct: num(bb.atk, 0.1) } });
+          battle.fx(charged ? 'sandChainsCharged' : 'sandChains', { x: unit.x, y: unit.y, id: unit.id });
+        },
+        onEnd({ battle, unit }) { unit.mem.billroCharged = false; battle.removeBuff(unit, 'billro:charged'); },
+      },
+      talents: [
+        { install(battle, unit) { // 生命之餐: every skill start heals 40 % max HP (×2 when charged)
+          battle.on('skillStart', (c) => {
+            if (c.unit !== unit) return;
+            const charged = isCharged(c.skill);
+            battle.heal(unit, unit, unit.s.maxHp * (charged ? num(t0['billro_t_1[enhance].heal_scale'], 0.8) : num(t0.heal_scale, 0.4)), { self: true });
+          }, { owner: unit });
+        } },
+        { install(battle, unit) { // 蓄势待发: +0.6 SP/s once a charge is stored
+          whileDeployed(battle, unit, 0.1, () => toggleBuff(battle, unit, 'billro:t2', !!unit.skill && unit.skill.charges >= 1 && !skillActive(unit), { spRecoveryFlat: num(t1.sp_recovery_per_sec, 0.6) }));
+        } },
+      ],
+      install(battle, unit) {
+        // module PLX-X (elite default): 技能开启时保留部分效果 (any skill; a charged S1 keeps the whole guard instead)
+        if (keepDef || keepRes) {
+          battle.on('skillStart', (c) => {
+            if (c.unit !== unit || (S1 && unit.mem.billroCharged)) return;
+            battle.addBuff(unit, { key: 'billro:keep', mods: { defPct: keepDef, resFlat: keepRes } });
+          }, { owner: unit });
+          battle.on('skillEnd', (c) => { if (c.unit === unit) battle.removeBuff(unit, 'billro:keep'); }, { owner: unit });
+        }
+        // module PLX-Y: 范围内敌人越多造成的伤害越高（每个 +3 %，最多 5 个）
+        const per = num(mb.damage_scale, 0), cap = num(mb.max_valid_stack_cnt, 5);
+        if (per > 0) {
+          battle.on('hit', (c) => {
+            if (c.source !== unit || c.target.side !== 'enemy') return;
+            const n = Math.min(cap, enemiesOnRange(battle, unit).length);
+            if (n > 0) c.dmg.mul *= 1 + per * n;
+          }, { owner: unit });
+        }
+        if (S3) {
+          // charged S3 食噬之印: each attack adds a stack BEFORE its damage (PRTS 备注 "于攻击造成伤害前生效"); stacks add up,
+          // +20 % damage taken from the mark's setter per stack. One mark per enemy (PRTS 备注 popup: "存在则为已有的BUFF叠加
+          // 一次加成，不存在则给与敌人仅对此卡涅利安的伤害生效的一个食噬之印BUFF"): another 卡涅利安 stacks it without the bonus
+          const per = num(bb['attack@damage_scale'], 0.2);
+          battle.on('hit', (c) => {
+            const e = c.target;
+            if (c.source !== unit || e.side !== 'enemy') return;
+            let m = e.findBuff?.(BILLRO_MARK) || null;
+            if (c.dmg.isAttack && skillActive(unit) && unit.mem.billroCharged) {
+              if (m) battle.addBuff(e, { key: BILLRO_MARK, refresh: 'stack', maxStacks: BILLRO_MARK_MAX, duration: m.timeLeft });
+              else {
+                m = battle.addBuff(e, { key: BILLRO_MARK, refresh: 'stack', maxStacks: BILLRO_MARK_MAX, duration: Math.max(0.1, (unit.skill?.timeLeft ?? 0) + 0.1), source: unit, visible: true });
+                if (m) unit.mem.billroMarked?.add(e.id);
+              }
+            }
+            if (m && m.source === unit) c.dmg.mul *= 1 + per * (m.stacks || 1);
+          }, { owner: unit });
+        }
+        if (!S2) return;
+        // "每次攻击对目标造成0.3秒停顿" (charged: 束缚): every enemy her attack damages — each one on her range
+        battle.on('damaged', (c) => {
+          const e = c.target;
+          if (c.source !== unit || !c.dmg || !c.dmg.isAttack || e.side !== 'enemy' || !e.alive || !skillActive(unit)) return;
+          if (unit.mem.billroCharged) battle.applyStatus(e, 'bind', { duration: num(bb['attack@root'], 0.3), source: unit });
+          else battle.applyStatus(e, 'sluggish', { duration: num(bb['attack@sluggish'], 0.3), source: unit });
+        }, { owner: unit });
+      },
+    };
+  },
+});
@@ -0,0 +1,150 @@
+// server/sim/content/kits/ops/chess_char_4_25-cetsyr.js — 魔王 (char_4134_cetsyr) kit, tier 4.
+// Conventions of the tier-4 kits: ../shared/tier4.js; kit contract and rules: ../README.md.
+
+import { COLS } from '../../../constants.js';
+import { canTargetEnemy } from '../../../targeting.js';
+import { aggregateMods } from '../../../buffs.js';
+import {
+  AURA, AURA_DUR, num, tbb, moduleBb, grid, enemyHasTag, whileDeployed, toggleBuff, skillActive, isSel, alt,
+  withDefaults,
+} from '../shared/tier4.js';
+
+/**
+ * 鼓舞 (ba.inspire "获得额外附加的基础属性加成（同类属性取最高）"): +`val` ATK (or max HP) on top of the target's own
+ * percentage multipliers (the flat mod is compensated, so an ATK+% skill does not scale it), the strongest source wins
+ * (the ATK key `inspire` is shared with 浊心斯卡蒂's 鼓舞); units flagged `mem.noInspire` (bards: 自身不受鼓舞影响) never
+ * receive it. Refreshed by an aura: lapses within AURA_DUR once the source stops.
+ */
+function inspire(battle, target, val, src, stat = 'atk') {
+  if (!(val > 0) || !target || !target.alive || target.mem?.noInspire) return;
+  const key = stat === 'hp' ? 'inspire:hp' : 'inspire';
+  const cur = target.findBuff(key);
+  if (cur && cur.data && cur.data.src !== src.id && cur.data.val > val && cur.timeLeft > 1e-6) return;
+  const { add, mul } = aggregateMods(target.buffs.filter((b) => b.key !== key));
+  const f = stat === 'hp' ? Math.max(0, 1 + (add.hpPct ?? 0)) * (mul.hpMul ?? 1) : Math.max(0, 1 + (add.atkPct ?? 0)) * (mul.atkMul ?? 1);
+  const flat = f > 1e-6 ? val / f : val;
+  battle.addBuff(target, { key, mods: stat === 'hp' ? { hpFlat: flat } : { atkFlat: flat }, duration: AURA_DUR, source: src, visible: true, data: { src: src.id, val } });
+}
+
+export default withDefaults({
+  // ===== 魔王 (bard) S3 编织重构现世 — wider range, trait 65 %, motes stay, 鼓舞 +65 % of her max HP, HP redistribution
+  //       S1 往昔萦绕身旁 (SP_FULL toggle, 持续时间无限: trait 20 %/28 %, motes respawn in `talent_cool_down` s); S2 明日渺远不及
+  //       (motes cap +3 and 6 at once, wider orbit — enemies within outside_radius — no longer touch operators: a mote
+  //       hitting an enemy deals 220 %/260 % ATK true damage + 3 s bind and respawns like any mote [ASSUMED]; 鼓舞: other
+  //       allies in range ATK + 65 %/80 % of her ATK)
+  chess_char_4_25_a: (bb, chess, def) => {
+    const t0 = tbb(def, 0), t1 = tbb(def, 1), mb = moduleBb(def);
+    const g = grid(def.skill?.rangeGrid);
+    const redistIv = Math.max(0.5, num(bb['attack@cetsyr_s_3[cal_hp_ratio].interval'], 2));
+    const S1 = isSel(def, 'skchr_cetsyr_1'), S2 = isSel(def, 'skchr_cetsyr_2'), S3 = isSel(def, 'skchr_cetsyr_3');
+    const baseCnt = Math.max(0, Math.floor(num(t0.cnt, 3)));
+    const MOTE_GAP = 0.5; // [ASSUMED] minimal time between two motes hitting the same enemy (s)
+    const setTrait = (unit, v) => { unit.mem.bardBase ??= unit.profile.auraRatio; unit.profile.auraRatio = num(v, unit.mem.bardBase); };
+    const resetTrait = (unit) => { if (unit.mem.bardBase != null) unit.profile.auraRatio = unit.mem.bardBase; };
+    return {
+      skills: alt(def, {
+        skchr_cetsyr_1: () => ({
+          kind: 'toggle',
+          trigger: 'SP_FULL', // 自动触发 (no 技能策略: the 吟游者 row is for MANUAL skills): on as soon as it is ready
+          onStart({ battle, unit }) { setTrait(unit, bb['attack@atk_to_hp_recovery_ratio']); battle.fx('mote', { x: unit.x, y: unit.y, id: unit.id }); },
+          onEnd({ unit }) { resetTrait(unit); },
+        }),
+        skchr_cetsyr_2: () => ({
+          kind: 'duration',
+          onStart({ battle, unit }) {
+            // “微尘”上限+3，立刻获得6枚“微尘”
+            unit.mem.motes = new Array(baseCnt + 3).fill(-Infinity);
+            unit.mem.moteHit = new Map();
+            battle.fx('reweave', { x: unit.x, y: unit.y, id: unit.id, n: unit.mem.motes.length });
+          },
+          onTick({ battle, unit }) { // 鼓舞: other allies in range ATK + x % of her ATK
+            for (const a of battle.alliesInGrid(unit)) if (a !== unit) inspire(battle, a, unit.s.atk * num(bb['attack@atk'], 0.65), unit);
+          },
+          onEnd({ battle, unit }) {
+            // back to the normal cap: the motes that come back first are kept
+            unit.mem.motes = (unit.mem.motes || []).slice().sort((a, b) => a - b).slice(0, baseCnt);
+            unit.mem.moteHit = null;
+          },
+        }),
+      }),
+      skill: {
+        kind: 'duration',
+        targeting: g ? { rangeGrid: g } : undefined,
+        onStart({ battle, unit }) {
+          setTrait(unit, bb['attack@atk_to_hp_recovery_ratio']);
+          unit.mem.redist = 0;
+          battle.fx('reweave', { x: unit.x, y: unit.y, id: unit.id });
+        },
+        onTick({ battle, unit, dt }) {
+          const others = battle.alliesInGrid(unit).filter((a) => a !== unit);
+          for (const a of others) inspire(battle, a, unit.s.maxHp * num(bb.max_hp, 0.65), unit, 'hp');
+          unit.mem.redist += dt;
+          if (unit.mem.redist + 1e-9 < redistIv) return;
+          unit.mem.redist -= redistIv;
+          const pool = battle.alliesInGrid(unit).filter((a) => !(a.s.flags.noHeal || a.profile?.noHeal) || a === unit);
+          let hp = 0, max = 0;
+          for (const a of pool) { hp += a.hp; max += a.s.maxHp; }
+          if (!(max > 0) || pool.length < 2) return;
+          const ratio = Math.min(1, hp / max);
+          for (const a of pool) a.hp = Math.max(1, Math.min(a.s.maxHp, a.s.maxHp * ratio));
+          battle.fx('redistribute', { x: unit.x, y: unit.y, id: unit.id, ratio: Math.round(ratio * 1000) / 1000 });
+        },
+        onEnd({ unit }) { if (unit.mem.bardBase != null) unit.profile.auraRatio = unit.mem.bardBase; },
+      },
+      talents: [
+        { install(battle, unit) { // 过往尘埃: 3 motes; touching an operator ⇒ her trait heal ×1.5 on it for 6 s; mote back after 6 s
+          unit.mem.motes = new Array(baseCnt).fill(-Infinity);
+          unit.mem.noInspire = true; // trait: 自身不受鼓舞影响 (another bard's 鼓舞 skips her)
+          const cooldown = () => (S1 && skillActive(unit) ? num(bb.talent_cool_down, 3) : num(t0.cooldown, 6)); // S1: 重生速度加快
+          const takeMote = () => {
+            const i = unit.mem.motes.findIndex((t) => t <= battle.time + 1e-9);
+            if (i < 0) return false;
+            unit.mem.motes[i] = battle.time + cooldown();
+            return true;
+          };
+          whileDeployed(battle, unit, 0.25, () => {
+            if (S2 && skillActive(unit)) {
+              // S2: motes orbit wider and hit enemies instead of operators
+              const hitAt = unit.mem.moteHit || (unit.mem.moteHit = new Map());
+              const foes = battle.foesInRadius(unit.x, unit.y, num(bb.outside_radius, 2)).filter((e) => canTargetEnemy(unit, e, { canHitFly: true }))
+                .sort((a, b) => a.id - b.id);
+              for (const e of foes) {
+                if ((hitAt.get(e.id) ?? -Infinity) > battle.time + 1e-9) continue;
+                if (!takeMote()) break;
+                hitAt.set(e.id, battle.time + MOTE_GAP);
+                battle.dealDamage(unit, e, { amount: unit.s.atk * num(bb.atk_scale, 2.2), type: 'true', isSkill: true, tags: ['skill', 'mote'] });
+                if (e.alive) battle.applyStatus(e, 'bind', { duration: num(bb.unmoveable_duration, 3), source: unit });
+                battle.fx('mote', { x: e.x, y: e.y, id: e.id });
+              }
+              return;
+            }
+            const keep = S3 && skillActive(unit); // S3: “微尘”不再消失
+            for (const a of battle.alliesInRadius(unit.x, unit.y, num(t0.range_radius, 1.15), unit.ownerId)) {
+              if (a === unit || a.kind !== 'op' || a.findBuff(`cetsyr:mote:${unit.id}`)) continue;
+              if (!keep && !takeMote()) break;
+              battle.addBuff(a, { key: `cetsyr:mote:${unit.id}`, duration: num(t0.talent_duration, 6), visible: true, source: unit });
+              battle.fx('mote', { x: a.x, y: a.y, id: a.id });
+            }
+          });
+          battle.on('heal', (c) => {
+            if (c.source === unit && c.opts?.aura && c.target.findBuff(`cetsyr:mote:${unit.id}`)) c.amount *= num(t0['attack@trait_mul'], 1.5);
+          }, { owner: unit });
+        } },
+        { install(battle, unit) { // 魔王残响: every ally takes −10 % damage from 萨卡兹 enemies (while she is in the squad)
+          battle.on('hit', (c) => {
+            if (c.target.side === 'ally' && c.target.ownerId === unit.ownerId && enemyHasTag(c.source, 'sarkaz')) c.dmg.mul *= 1 - num(t1.damage_resistance, 0.1);
+          }, { owner: unit });
+        } },
+      ],
+      install(battle, unit) {
+        const a = num(mb.atk, 0), cnt = num(mb.cnt, 2); // module (elite): ≥ 2 other operators in her normal range ⇒ ATK +8 %
+        if (!a) return;
+        whileDeployed(battle, unit, AURA, () => {
+          const set = new Set(unit.baseRangeKeys || []);
+          const n = battle.allies(unit.ownerId).filter((o) => o !== unit && o.kind === 'op' && set.has(o.tileR * COLS + o.tileC)).length;
+          toggleBuff(battle, unit, 'cetsyr:module', n >= cnt, { atkPct: a });
+        });
+      },
+    };
+  },
+});
@@ -0,0 +1,66 @@
+// server/sim/content/kits/ops/chess_char_4_26-bldsk.js — 华法琳 (char_171_bldsk) kit, tier 4.
+// Conventions of the tier-4 kits: ../shared/tier4.js; kit contract and rules: ../README.md.
+
+import { bodyInKeys } from '../../../body.js';
+import { num, tbb, keySet, isSel, alt, installLowHpHealBonus, withDefaults } from '../shared/tier4.js';
+
+export default withDefaults({
+  // ===== 华法琳 (physician) S1 紧急包扎 — charges: a heal on an ally below 50 % adds 15 % of its max HP; 血液样本回收
+  //       S2 不稳定血浆 (she and one random other ally in range: ATK +45 %/+60 %, lose 3 % max HP per s, 15 s)
+  chess_char_4_26_a: (bb, chess, def) => {
+    const t0 = tbb(def, 0);
+    const tb = def.traitBb || {};
+    const S1 = isSel(def, 'skchr_bldsk_1');
+    const plasma = (battle, unit, a) => battle.addBuff(a, {
+      key: 'bldsk:plasma', duration: num(bb.duration, 15) + 1e-6, interval: Math.max(0.1, num(bb.interval, 1)), mods: { atkPct: num(bb.atk) }, visible: true, source: unit,
+      onTick: ({ unit: t }) => battle.loseHp(t, t.s.maxHp * num(bb.hp_ratio, 0.03), { tags: ['skill', 'plasma'] }), // (no source: not damage dealt)
+    });
+    return {
+      skills: alt(def, {
+        skchr_bldsk_2: () => ({
+          kind: 'instant', heal: true,
+          onStart({ battle, unit }) {
+            plasma(battle, unit, unit);
+            const pick = battle.rng.pick(battle.alliesInGrid(unit).filter((a) => a !== unit));
+            if (pick) plasma(battle, unit, pick);
+            battle.fx('bloodBattle', { x: unit.x, y: unit.y, id: unit.id, target: pick ? pick.id : null });
+          },
+        }),
+      }),
+      skill: {
+        kind: (def.skill?.maxCharges ?? 1) > 1 ? 'charges' : 'instant',
+        heal: true,
+        trigger: { rule: 'CUSTOM_RANGE', grid: [] }, // never auto-cast by the engine: fired by the kit on a < 50 % heal target
+      },
+      talents: [{ install(battle, unit) { // 血液样本回收: an enemy falls in range ⇒ +2 SP to her and a random ally in range
+        battle.on('death', (c) => {
+          const e = c.unit;
+          if (c.reason !== 'killed' || e.side !== 'enemy' || !unit.alive || !unit.deployed || !bodyInKeys(e, keySet(unit))) return;
+          unit.skill?.gainSp(num(t0['bldsk_t_1[self].sp'], 2), 'talent');
+          // SP cannot be gained while a timed skill runs (engine gainSp ignores it): such allies are not picked
+          const pick = battle.rng.pick(battle.alliesInGrid(unit).filter((a) => a !== unit && a.skill && !a.skill.noSkill && a.skill.kind !== 'passive' && !(a.skill.active && a.skill.isTimed)));
+          if (pick) { pick.skill.gainSp(num(t0['bldsk_t_1[rand].sp'], 2), 'talent'); battle.fx('spGift', { x: pick.x, y: pick.y, id: pick.id }); }
+        }, { owner: unit });
+      } }],
+      install(battle, unit) {
+        installLowHpHealBonus(battle, unit, tb);
+        if (!S1) return;
+        battle.on('beforeAttack', (c) => {
+          if (c.attacker !== unit) return;
+          const t = c.targets[0];
+          const sk = unit.skill;
+          if (!t || t.side !== 'ally' || t.hpRatio >= 0.5 || !sk || !sk.ready || unit.s.flags.silence) return;
+          if (sk.activate('DEFAULT')) unit.mem.bandage = t;
+        }, { owner: unit, priority: 5 });
+        battle.on('attack', (c) => {
+          if (c.attacker !== unit || !unit.mem.bandage) return;
+          const t = unit.mem.bandage;
+          unit.mem.bandage = null;
+          unit.mem.skipSp = true; // the skill heal recovers no attack SP (AK)
+          if (t.alive) { battle.heal(unit, t, t.s.maxHp * num(bb.hp_ratio, 0.15)); battle.fx('bandage', { x: t.x, y: t.y, id: t.id }); }
+        }, { owner: unit });
+        battle.on('spGain', (c) => { if (c.unit === unit && c.reason === 'attack' && unit.mem.skipSp) { unit.mem.skipSp = false; c.amount = 0; } }, { owner: unit });
+      },
+    };
+  },
+});
@@ -0,0 +1,124 @@
+// server/sim/content/kits/ops/chess_char_5_01-excu2.js — 圣约送葬人 (char_1032_excu2) kit, tier 5.
+// Conventions of the tier-5 kits: ../shared/tier5.js; kit contract and rules: ../README.md.
+
+import {
+  num, on, talent, batPct, mods, inFaction, isOp, selectedId, lazySkills, skillRange, crowdAspd,
+} from '../shared/tier5.js';
+
+const isLaterano = (u) => inFaction(u, 'lateranoShip', ['laterano']);
+
+/** Enemy `e` attacks `t` in melee (not a ranged shot), mirroring ai.js enemyAttack. */
+function meleeAttacker(e, t) {
+  const melee = e.profile?.melee ?? e.def?.applyWay === 'MELEE';
+  const r = num(e.base?.rangeRadius, 0);
+  return melee || !(r > 0) || (e.blockedBy === t && r < 1);
+}
+
+export default {
+  // ---------------------------------------------------------------------------------------------------------------
+  // 圣约送葬人 — S2 近身铳斗 (ammo, attack SP): ATK/DEF +, block +1, melee hits dodged with prob (+ammo refill).
+  // T1 受选之人: extra attack chance (+prob_add per ammo spent in the skill). T2 铳弹共感: +ammo per Laterano op.
+  // S1 遗嘱执行 (ammo 8, attack SP): skill range, ATK +, ignores def_penetrate_fixed DEF.
+  // S3 圣约决裁 (ammo 16): skill range, BAT +0.5 s, ATK +; +attack@atk ATK per bullet spent (≤ attack@max_stack_cnt),
+  // reaper self-heal ×trait_ratio; at the end every enemy attacked during the skill takes attack@final_atk_scale × ATK phys.
+  // Module REA-Y (elite): ASPD +12 with ≥ 2 enemies in range.
+  chess_char_5_01_a: (bb, chess, def) => {
+    const t0 = talent(chess, 0), t1 = talent(chess, 1), tm = talent(chess, -1);
+    const sid = selectedId(chess, def);
+    const prob = num(bb.prob), refill = num(bb.recover_cnt, 1);
+    return {
+      skills: lazySkills({
+        skchr_excu2_1: () => ({
+          kind: 'ammo', ammo: num(bb['attack@trigger_time'], 8),
+          mods: mods({ atkPct: num(bb.atk), defIgnoreFlat: num(bb.def_penetrate_fixed) }),
+          targeting: skillRange(chess, def),
+        }),
+        skchr_excu2_3: () => ({
+          kind: 'ammo', ammo: num(bb['attack@trigger_time'], 16),
+          mods: mods({ atkPct: num(bb.atk), batPct: batPct(bb.base_attack_time, chess) }),
+          targeting: skillRange(chess, def),
+          attack: { onEachHit({ unit, target }) { if (target && target.side === 'enemy') unit.mem.verdict?.add(target); } },
+          onStart({ unit }) {
+            unit.mem.verdict = new Set();
+            // 特性的回复生命效果提高至2倍 (the reaper profile reads profile.selfHeal on every attack)
+            if (unit.profile) { unit.mem.verdictHeal0 ??= num(unit.profile.selfHeal, 50); unit.profile.selfHeal = unit.mem.verdictHeal0 * num(bb.trait_ratio, 1); }
+          },
+          onEnd({ battle, unit }) {
+            const hit = unit.mem.verdict;
+            unit.mem.verdict = null;
+            if (unit.profile && unit.mem.verdictHeal0 != null) unit.profile.selfHeal = unit.mem.verdictHeal0;
+            if (hit && unit.alive) {
+              for (const e of hit) {
+                if (e.alive) battle.dealDamage(unit, e, { amount: unit.s.atk * num(bb['attack@final_atk_scale']), type: 'phys', isSkill: true, tags: ['skill', 'verdict'] });
+              }
+              battle.fx('aoe', { x: unit.x, y: unit.y, id: unit.id, r: 1.5, skill: 'excu2' });
+            }
+            battle.removeBuff(unit, 'excu2:verdict');
+          },
+        }),
+      }),
+      skill: {
+        kind: 'ammo', ammo: num(bb['attack@trigger_time'], 12),
+        mods: mods({ atkPct: num(bb.atk), defPct: num(bb.def), blockCnt: num(bb.block_cnt) }),
+      },
+      // REA-Y: its trait part is DISPLAY-only (official battle_equip_table uniequip_003_excu2: target DISPLAY, the ASPD
+      // text "{value}" = 12; the ASPD rider itself is the talent −1 part). data/chess.json merges that display blackboard
+      // into trait.bb ({value: 12}), which the reaper profile would read as its per-hit heal: the heal stays the base
+      // trait's (50).
+      trait: tm['trigger_cnt[equip]'] != null && chess?.traitBase?.bb?.value != null ? { selfHeal: num(chess.traitBase.bb.value, 50) } : undefined,
+      talents: [
+        { install(battle, unit) { // 受选之人
+          let spent = 0;
+          const reset = (c) => { if (c.unit === unit) spent = 0; };
+          battle.on('skillStart', reset, { owner: unit });
+          battle.on('skillEnd', reset, { owner: unit });
+          battle.on('ammoUsed', (c) => { if (c.unit === unit) spent++; }, { owner: unit });
+          // PRTS 备注: "触发时可额外回复1点攻击回复技力，不额外消耗弹药" — the extra attack is an attack (attack SP, trait
+          // heal) but consumes no ammo (engine forceAttack `noAmmo`: no bullet, no ammoUsed for any listener — the
+          // 7-bullet 特质 counter, items, bonds and the prob_add counter above)
+          battle.on('attack', (c) => {
+            if (c.attacker !== unit || unit.mem.extraAttack || !on(unit)) return;
+            const p = num(t0.prob) + (unit.skill?.active ? num(t0.prob_add) * spent : 0);
+            if (!(p > 0) || !battle.rng.chance(Math.min(1, p))) return;
+            const dep = unit.deploySeq;
+            battle.after(0, () => {
+              if (!on(unit) || unit.deploySeq !== dep || !unit.canAct || unit.s.flags.disarm) return;
+              unit.mem.extraAttack = true;
+              let hit = false;
+              try { hit = battle.forceAttack(unit, null, { noAmmo: true }); } finally { unit.mem.extraAttack = false; }
+              if (hit) battle.fx('extraAttack', { x: unit.x, y: unit.y, id: unit.id });
+            }, { owner: unit });
+          }, { owner: unit });
+        } },
+        { install(battle, unit) { // 铳弹共感
+          battle.on('skillStart', (c) => {
+            if (c.unit !== unit || c.skill.kind !== 'ammo') return;
+            const n = battle.allies().filter((a) => isOp(a) && isLaterano(a)).length;
+            const stacks = Math.min(num(t1.add_count_max_stack, 4), n);
+            if (stacks > 0) c.skill.addAmmo(stacks * num(t1.add_count, 1));
+          }, { owner: unit });
+        } },
+      ],
+      install(battle, unit) {
+        crowdAspd(battle, unit, 'excu2:module', num(tm.attack_speed), num(tm['trigger_cnt[equip]']));
+        if (sid === 'skchr_excu2_3') { // S3: +attack@atk ATK per bullet spent
+          battle.on('ammoUsed', (c) => {
+            if (c.unit !== unit || !unit.skill?.active) return;
+            battle.addBuff(unit, { key: 'excu2:verdict', refresh: 'stack', maxStacks: Math.max(1, num(bb['attack@max_stack_cnt'], 30)), mods: mods({ atkPct: num(bb['attack@atk']) }) });
+          }, { owner: unit });
+        }
+        if (sid && sid !== 'skchr_excu2_2') return;
+        // S2: melee attacks dodged with `prob`, each dodge refills ammo
+        battle.on('hit', (c) => {
+          if (c.target !== unit || !unit.skill?.active || !c.source || c.source.side !== 'enemy' || !c.dmg.isAttack) return;
+          if (!meleeAttacker(c.source, unit) || !(prob > 0) || !battle.rng.chance(prob)) return;
+          c.dmg.cancel = true;
+          battle.fx('dodge', { x: unit.x, y: unit.y, id: unit.id });
+          // a dodge like the engine's (listeners of the `dodge` hook — items/bonds — see it too)
+          if (battle.hasHook('dodge')) battle.emit('dodge', { source: c.source, target: unit, dmg: c.dmg });
+          unit.skill.addAmmo(refill);
+        }, { owner: unit });
+      },
+    };
+  },
+};
@@ -0,0 +1,177 @@
+// server/sim/content/kits/ops/chess_char_5_02-titi.js — 缇缇 (char_4056_titi) kit, tier 5.
+// Conventions of the tier-5 kits: ../shared/tier5.js; kit contract and rules: ../README.md.
+
+import { COLS } from '../../../constants.js';
+import {
+  AURA_IV, AURA_DUR, RING1, num, on, talent, mods, dist, inFaction, isOp, selectedId, lazySkills, whileOn,
+} from '../shared/tier5.js';
+
+const isSargonMinos = (u) => inFaction(u, 'sargonShip', ['sargon', 'minos']);
+
+/** Enemy not moving along its route (blocked, stunned, rooted, waiting…). */
+const isStill = (e) => !!(e.blockedBy || !e.moving || e.s.flags.stun || e.s.flags.noMove || !(e.s.moveSpeed > 0));
+
+export default {
+  // ---------------------------------------------------------------------------------------------------------------
+  // 缇缇 — S3 旧日绽放 (25 s): ATK +, 2 targets, sleeps non-sleeping targets; during the skill every enemy waking up (or
+  // knocked out asleep) takes arts damage growing with the sleep time (linear min_atk_scale → max_atk_scale over `sleep` s,
+  // PRTS 备注) and sends the highest-aggro enemy within range_radius to sleep; other allies in range fall asleep (小睡)
+  // instead of dying. T1 凝固的时光: can attack sleeping enemies, +15 % ATK arts vs non-moving
+  // enemies, sleeping enemies take 30 % ATK arts/s. T2 勇气的报偿: Sargon/Minos ops above 50 % HP get +20 ASPD.
+  // S1 缓蚀 (duration): ATK +, attack@prob chance per attack to sleep the target attack@sleep s.
+  // S2 封护 (duration): no attacks, ATK +; she and the lowest-HP-ratio operator in her range sleep until the skill ends
+  // (沉睡 = invulnerable), enemies around either of them keep falling asleep; T1 ×talent_scale.
+  chess_char_5_02_a: (bb, chess, def) => {
+    const t0 = talent(chess, 0), t1 = talent(chess, 1);
+    const sid = selectedId(chess, def);
+    const hitSleep = num(bb['attack@sleep'], num(bb.sleep, 5));
+    const minS = num(bb.min_atk_scale, 1), maxS = num(bb.max_atk_scale, minS);
+    const chainSleep = num(bb.sleep, hitSleep), radius = num(bb.range_radius, 1.5), chainN = Math.max(1, num(bb.max_target, 1));
+    // S2 封护: "第一天赋效果提升至N倍" while it runs
+    const t0Scale = (unit) => (sid === 'skchr_titi_2' && unit.skill?.active ? num(bb.talent_scale, 1) : 1);
+    const ward = (battle, unit, a) => {
+      const entered = !a.buffs.some((b) => (b.status ?? b.key) === 'sleep');
+      battle.addBuff(a, { key: 'titi:ward', flags: { sleep: true }, visible: true, status: 'sleep', data: { src: unit } });
+      battle.releaseBlocked(a);
+      if (battle.hasHook('statusApplied')) battle.emit('statusApplied', { source: unit, target: a, status: 'sleep', duration: Infinity, entered });
+    };
+    return {
+      skills: lazySkills({
+        skchr_titi_1: () => ({
+          kind: 'duration', mods: mods({ atkPct: num(bb.atk) }),
+          attack: {
+            onHit({ battle, unit, target }) {
+              if (!target || !target.alive || target.s.flags.sleep || !battle.rng.chance(num(bb['attack@prob']))) return;
+              battle.applyStatus(target, 'sleep', { duration: num(bb['attack@sleep']), source: unit });
+            },
+          },
+        }),
+        skchr_titi_2: () => ({
+          kind: 'duration', mods: mods({ atkPct: num(bb.atk) }),
+          attack: { noAttack: true },
+          onStart({ battle, unit }) {
+            const pick = battle.alliesInGrid(unit).filter((a) => a !== unit && isOp(a) && a.hp > 0)
+              .sort((a, b) => a.hpRatio - b.hpRatio || a.id - b.id)[0] ?? null;
+            unit.mem.titiWard = pick ? [unit, pick] : [unit];
+            for (const a of unit.mem.titiWard) ward(battle, unit, a);
+            unit.mem.titiWardAcc = AURA_IV;
+            battle.fx('sleepGuard', { x: unit.x, y: unit.y, id: unit.id });
+          },
+          onTick({ battle, unit, dt }) {
+            unit.mem.titiWardAcc += dt;
+            if (unit.mem.titiWardAcc < AURA_IV - 1e-9) return;
+            unit.mem.titiWardAcc = 0;
+            for (const a of unit.mem.titiWard || []) {
+              if (!a.alive || !a.deployed || !a.findBuff('titi:ward')) continue;
+              for (const e of battle.foesInRadius(a.x, a.y, RING1)) if (e.alive) battle.applyStatus(e, 'sleep', { duration: AURA_DUR, source: unit });
+            }
+          },
+          onEnd({ battle, unit }) {
+            for (const a of unit.mem.titiWard || []) {
+              const b = a.findBuff('titi:ward');
+              if (b && b.data.src === unit) battle.removeBuff(a, b);
+            }
+            unit.mem.titiWard = null;
+          },
+        }),
+      }),
+      trait: { hitSleep: true }, // 凝固的时光 (a): she targets and damages sleeping enemies (沉睡 = 无敌 for everyone else)
+      skill: {
+        kind: 'duration',
+        mods: mods({ atkPct: num(bb.atk) }),
+        attack: {
+          maxTargets: Math.max(1, num(bb['attack@max_target'], 2)),
+          onHit({ battle, unit, target }) {
+            if (!target || !target.alive || target.s.flags.sleep) return;
+            battle.applyStatus(target, 'sleep', { duration: hitSleep, source: unit });
+          },
+        },
+        onEnd({ battle, unit }) {
+          for (const a of battle.allyUnits) {
+            const b = a.findBuff('titi:allySleep');
+            if (b && b.data.src === unit) battle.removeBuff(a, b);
+          }
+        },
+      },
+      talents: [
+        { install(battle, unit) { // 凝固的时光 — (a) is the `hitSleep` trait above
+          // (b) +extra_atk_scale arts vs non-moving enemies
+          battle.on('damaged', (c) => {
+            if (c.source !== unit || !c.dmg?.isAttack || c.dmg.isSplash || c.type === 'element') return;
+            const e = c.target;
+            if (e.side !== 'enemy' || !e.alive || !isStill(e)) return;
+            battle.dealDamage(unit, e, { amount: unit.s.atk * num(t0.extra_atk_scale) * t0Scale(unit), type: 'arts', tags: ['talent', 'titiStill'] });
+          }, { owner: unit });
+          // (c) sleeping enemies take damage_atk_scale × ATK arts per second
+          whileOn(battle, unit, 1, () => {
+            const amount = unit.s.atk * num(t0.damage_atk_scale) * t0Scale(unit);
+            for (const e of battle.enemies) {
+              if (e.alive && !e.hidden && e.s.flags.sleep) battle.dealDamage(unit, e, { amount, type: 'arts', tags: ['talent', 'titiDream'] });
+            }
+          });
+        } },
+        { install(battle, unit) { // 勇气的报偿: 精力充沛
+          whileOn(battle, unit, AURA_IV, () => {
+            for (const a of battle.allies()) {
+              if (isOp(a) && isSargonMinos(a) && a.hpRatio > num(t1.hp_ratio, 0.5)) battle.addBuff(a, { key: 'titi:vigor', duration: AURA_DUR, mods: { aspd: num(t1.attack_speed) } });
+            }
+          });
+        } },
+      ],
+      install(battle, unit) {
+        if (sid && sid !== 'skchr_titi_3') return;
+        // S3: wake-up burst chain (sleep applied by anyone counts)
+        const asleep = new Map();
+        // PRTS 备注: "向1.5半径内除该单位外仇恨值最高的敌方单位施加沉睡" — highest aggro (taunt) first, then the nearest
+        const sleepOthers = (from) => {
+          const cands = battle.foesInRadius(from.x, from.y, radius).filter((o) => o !== from && !o.s.flags.sleep && !o.mem?.candleOwner)
+            .sort((a, b) => (b.s.taunt || 0) - (a.s.taunt || 0) || dist(a, from) - dist(b, from) || a.spawnSeq - b.spawnSeq);
+          let n = 0;
+          for (const o of cands) {
+            if (n >= chainN) break;
+            if (battle.applyStatus(o, 'sleep', { duration: chainSleep, source: unit })) n++;
+          }
+        };
+        battle.on('statusApplied', (c) => {
+          if (c.status === 'sleep' && c.target.side === 'enemy' && !asleep.has(c.target)) asleep.set(c.target, battle.time);
+        }, { owner: unit });
+        battle.on('tick', () => {
+          if (!asleep.size) return;
+          for (const [e, t0s] of asleep) {
+            if (!e.alive) { asleep.delete(e); continue; }
+            if (e.s.flags.sleep) continue;
+            asleep.delete(e);
+            if (!unit.skill?.active || !on(unit)) continue;
+            const scale = minS + (maxS - minS) * Math.min(1, (battle.time - t0s) / Math.max(0.1, chainSleep));
+            battle.dealDamage(unit, e, { amount: unit.s.atk * scale, type: 'arts', isSkill: true, tags: ['skill', 'titiWake'] });
+            battle.fx('wake', { x: e.x, y: e.y, id: e.id, scale: Math.round(scale * 100) / 100 });
+            sleepOthers(e);
+          }
+        }, { owner: unit });
+        battle.on('kill', (c) => {
+          const v = c.victim;
+          if (v.side !== 'enemy' || !asleep.has(v)) return;
+          asleep.delete(v);
+          if (unit.skill?.active && on(unit)) sleepOthers(v);
+        }, { owner: unit });
+        // S3: other allies in range fall asleep instead of dying, until healed to full or the skill ends
+        battle.on('fatal', (c) => {
+          const a = c.unit;
+          if (c.prevented || a.side !== 'ally' || a === unit) return;
+          const guard = a.findBuff('titi:allySleep');
+          if (guard) { if (guard.data.src === unit) c.prevented = true; return; }
+          if (!isOp(a) || !unit.skill?.active || !on(unit) || !unit.rangeKeySet?.has(a.tileR * COLS + a.tileC)) return;
+          c.prevented = true;
+          const entered = !a.buffs.some((b) => (b.status ?? b.key) === 'sleep');
+          battle.addBuff(a, {
+            key: 'titi:allySleep', flags: { sleep: true }, visible: true, status: 'sleep', data: { src: unit }, interval: 0.2,
+            onTick: ({ unit: x, buff }) => { if (x.hp >= x.s.maxHp - 1e-6) battle.removeBuff(x, buff); },
+          });
+          // other content (特质 "干员进入沉睡时") observes it like any sleep status
+          if (battle.hasHook('statusApplied')) battle.emit('statusApplied', { source: unit, target: a, status: 'sleep', duration: Infinity, entered });
+          battle.fx('sleepGuard', { x: a.x, y: a.y, id: a.id });
+        }, { owner: unit, priority: 5 });
+      },
+    };
+  },
+};
@@ -0,0 +1,166 @@
+// server/sim/content/kits/ops/chess_char_5_03-blaze2.js — 烛煌 (char_1040_blaze2) kit, tier 5.
+// Conventions of the tier-5 kits: ../shared/tier5.js; kit contract and rules: ../README.md.
+
+import { COLS } from '../../../constants.js';
+import { bodyInKeys } from '../../../body.js';
+import {
+  AURA_IV, AURA_DUR, num, on, talent, traitBb, skillGrid, batPct, mods, isOp, selectedId, lazySkills, instantKind,
+  skillRange, burstSpUp, elementHit, whileOn, burstDamageUp,
+} from '../shared/tier5.js';
+
+/** 烛煌 绝处重燃 "使附近的敌人晕眩" radius (tiles). PRTS 备注: 1.7. */
+const NEARBY_RADIUS = 1.7;
+/** 烛煌 S3 "攻击变为群体攻击": splash radius around the target (tiles). PRTS 技能3 备注 "攻击溅射半径1.7". */
+const BLAZE_S3_SPLASH = 1.7;
+
+export default {
+  // ---------------------------------------------------------------------------------------------------------------
+  // 烛煌 — S3 众恶的焚场 (ammo): skill range 4-11 (the targets; the DEFAULT cast still needs an enemy in 3-1), ATK +,
+  // BAT −1.3 s, "攻击变为群体攻击" = one target + a BLAZE_S3_SPLASH (1.7) splash around it (PRTS 备注 "攻击溅射半径1.7",
+  // 中点判定 — so the fire reaches past the diamond; it used to hit every enemy inside it instead, community report E1
+  // after 0.1.0), +attack@atk_scale ATK elemental damage to every enemy of the attack in a burn burst (main and splash),
+  // dealt BEFORE the attack's own damage ("于攻击造成伤害前判定元素爆发并造成元素伤害": a 'hit' hook — so a hit that kills
+  // or starts the burst keeps / does not get it); loses 3 % max HP/s; any burn burst on the field refills ammo_recover
+  // bullets, never above the skill's ammo ("补充后的弹药数量无法超过上限"). Each landed bolt shows its splash (fx 'splash' r 1.7).
+  // T1 熔点引爆: burn burst anywhere → 350 % ATK elemental damage to it + heal 12 % max HP. T2 绝处重燃: downed instead of
+  // dying (6000 shield, no attack, no heal, 3 %/s regen) → revives at full HP and stuns nearby enemies.
+  // Module (elite): ×damage_scale vs enemies in an element burst.
+  // S1 炙手之援 (instant): the operator with the highest max HP in her range carries a fire aura for max_duration s —
+  // every `interval` s the enemies within range_radius of it take atk_scale × her ATK arts + element_multiplier × that
+  // damage as 灼燃损伤. S2 沸血燎原 (duration): skill range, BAT +0.9 s, ATK +, 3 targets; each attack costs
+  // attack@hp_ratio of her max HP and leaves a burning tile under every target: ground enemies on it move −50 % and take
+  // atk_scale × ATK arts + element_damage_scale × that as 灼燃损伤 per second (the tiles burn until the skill ends
+  // [ASSUMED: no duration in the data]). Module PRI-Y (elite): SP +0.2/s while an enemy in range is in an element burst.
+  chess_char_5_03_a: (bb, chess, def) => {
+    const t0 = talent(chess, 0), t1 = talent(chess, 1), tb = traitBb(chess), tm = talent(chess, -1);
+    const sid = selectedId(chess, def);
+    const lose = num(bb.lose_hp_scale);
+    const burnTiles = (battle, unit) => {
+      const tiles = unit.mem.blazeTiles;
+      if (!tiles || !tiles.size) return;
+      unit.mem.blazeAcc2 = (unit.mem.blazeAcc2 ?? 0) + AURA_IV;
+      const dmgTick = unit.mem.blazeAcc2 >= 1 - 1e-9;
+      if (dmgTick) unit.mem.blazeAcc2 -= 1;
+      for (const e of battle.enemies) {
+        if (!e.alive || e.hidden || e.isFlying || !bodyInKeys(e, tiles)) continue;
+        battle.addBuff(e, { key: `blaze2:ground:${unit.id}`, duration: AURA_DUR, mods: { moveMul: Math.max(0, 1 + num(bb.move_speed)) } });
+        if (!dmgTick) continue;
+        const d = battle.dealDamage(unit, e, { amount: unit.s.atk * num(bb.atk_scale), type: 'arts', isSkill: true, tags: ['skill', 'blazeGround'] });
+        if (d > 0 && e.alive) battle.dealDamage(unit, e, { type: 'element', element: 'burn', amount: d * num(bb.element_damage_scale), tags: ['skill', 'blazeGround'] });
+      }
+    };
+    return {
+      skills: lazySkills({
+        skchr_blaze2_1: () => ({
+          kind: instantKind(chess, def),
+          onStart({ battle, unit }) {
+            const t = battle.alliesInGrid(unit).filter((a) => isOp(a)).sort((a, b) => b.s.maxHp - a.s.maxHp || a.id - b.id)[0];
+            if (!t) return;
+            const r = num(bb.range_radius, 1.5);
+            battle.addBuff(t, {
+              key: `blaze2:aid:${unit.id}`, duration: num(bb.max_duration, 20), interval: Math.max(0.1, num(bb.interval, 1)), visible: true, data: { src: unit },
+              onTick: ({ unit: x }) => {
+                for (const e of battle.foesInRadius(x.x, x.y, r)) {
+                  const d = battle.dealDamage(unit, e, { amount: unit.s.atk * num(bb.atk_scale), type: 'arts', isSkill: true, tags: ['skill', 'blazeAid'] });
+                  if (d > 0 && e.alive) battle.dealDamage(unit, e, { type: 'element', element: 'burn', amount: d * num(bb.element_multiplier), tags: ['skill', 'blazeAid'] });
+                }
+              },
+            });
+            battle.fx('aoe', { x: t.x, y: t.y, id: unit.id, r, skill: 'blaze2Aid' });
+          },
+        }),
+        skchr_blaze2_2: () => ({
+          kind: 'duration',
+          mods: mods({ atkPct: num(bb.atk), batPct: batPct(bb.base_attack_time, chess) }),
+          targeting: skillRange(chess, def, { maxTargets: Math.max(1, num(bb['attack@max_target'], 3)) }),
+          attack: {
+            onEachHit({ unit, target }) {
+              if (target && target.side === 'enemy') unit.mem.blazeTiles?.add(Math.round(target.y) * COLS + Math.round(target.x));
+            },
+          },
+          onStart({ unit }) { unit.mem.blazeTiles = new Set(); unit.mem.blazeAcc2 = 0; },
+          onAttack({ battle, unit }) { battle.loseHp(unit, unit.s.maxHp * num(bb['attack@hp_ratio']), { source: unit }); },
+          onEnd({ unit }) { unit.mem.blazeTiles = null; },
+        }),
+      }),
+      skill: {
+        kind: 'ammo', ammo: num(bb['attack@trigger_time'], 18),
+        mods: mods({ atkPct: num(bb.atk), batPct: batPct(bb.base_attack_time, chess) }),
+        targeting: skillGrid(chess, def) ? { rangeGrid: skillGrid(chess, def) } : undefined,
+        attack: {
+          splashRadius: BLAZE_S3_SPLASH,
+          // the fire of each landed bolt (the screen rings splash attacks by sub-profession; 本源术师 is not one): once
+          // per attack at the main target / its spot — from the profile it was fired with, so the last bolt too
+          onHit({ battle, unit, target, x, y }) {
+            battle.fx('splash', { x, y, ...(target && target.alive ? { id: target.id } : {}), src: unit.id, r: BLAZE_S3_SPLASH, element: 'burn' });
+          },
+        },
+        onStart({ unit }) { unit.mem.blazeAcc = 0; },
+        onTick({ battle, unit, dt }) {
+          if (!(lose > 0)) return;
+          unit.mem.blazeAcc = (unit.mem.blazeAcc ?? 0) + dt;
+          while (unit.mem.blazeAcc >= 1 && unit.alive) {
+            unit.mem.blazeAcc -= 1;
+            battle.loseHp(unit, unit.s.maxHp * lose, { source: unit });
+          }
+        },
+      },
+      talents: [
+        { install(battle, unit) { // 熔点引爆
+          battle.on('elementBurst', (c) => {
+            if (c.element !== 'burn' || !on(unit) || c.target.side !== 'enemy') return;
+            elementHit(battle, unit, c.target, unit.s.atk * num(t0.ep_damage_scale), 'blazeMelt', 'burn');
+            // 绝处重燃: "倒地期间…无法被治疗" — the meltdown heal does not reach her while downed
+            if (!unit.mem.downed) battle.heal(unit, unit, unit.s.maxHp * num(t0.hp_ratio), { self: true });
+            battle.fx('meltdown', { x: c.target.x, y: c.target.y, id: c.target.id });
+          }, { owner: unit });
+        } },
+        { install(battle, unit) { // 绝处重燃
+          battle.on('deploy', (c) => { if (c.unit === unit) unit.mem.downed = false; }, { owner: unit });
+          battle.on('fatal', (c) => {
+            if (c.unit !== unit || c.prevented || unit.mem.downed) return;
+            c.prevented = true;
+            unit.mem.downed = true;
+            if (unit.skill?.active) unit.skill.end('downed');
+            battle.releaseBlocked(unit);
+            const dep = unit.deploySeq;
+            battle.addBuff(unit, {
+              key: 'blaze2:downed', visible: true, shield: num(t1.dynamic), interval: 0.2,
+              flags: { disarm: true, noHeal: true },
+              mods: mods({ hpRegenRatio: num(t1.hp_recovery_per_sec_by_max_hp_ratio), blockCnt: -99 }),
+              onTick: ({ unit: u, buff }) => {
+                if (u.deploySeq !== dep || u.hp < u.s.maxHp - 1e-6) return;
+                battle.removeBuff(u, buff);
+                u.mem.downed = false;
+                for (const e of battle.foesInRadius(u.x, u.y, NEARBY_RADIUS)) if (e.alive) battle.applyStatus(e, 'stun', { duration: num(t1.stun), source: u });
+                battle.fx('revive', { x: u.x, y: u.y, id: u.id, r: NEARBY_RADIUS });
+              },
+            });
+            battle.fx('downed', { x: unit.x, y: unit.y, id: unit.id });
+          }, { owner: unit, priority: -50 });
+        } },
+      ],
+      install(battle, unit) {
+        burstDamageUp(battle, unit, num(tb.damage_scale));
+        burstSpUp(battle, unit, 'blaze2:module', num(tm.sp_recovery_per_sec));
+        if (sid === 'skchr_blaze2_2') whileOn(battle, unit, AURA_IV, () => burnTiles(battle, unit));
+        if (sid && sid !== 'skchr_blaze2_3') return;
+        // S3: each hit of her skill attack (main and splash) on an enemy in a burn burst deals the bonus first (PRTS 备注).
+        // Gated on the attack's own isSkill (captured when the bolt was fired), not on the live skill: her bolts land after
+        // the last bullet's end('ammo') / an early end (downed), and those still carry it. Only S3 runs here (sid gate).
+        battle.on('hit', (c) => {
+          const d = c.dmg, t = c.target;
+          if (c.source !== unit || !d.isAttack || !d.isSkill || d.cancel) return;
+          if (t.side === 'enemy' && t.alive && t.findBuff('burnBurst')) elementHit(battle, unit, t, unit.s.atk * num(bb['attack@atk_scale']), 'blazeBurn', 'burn');
+        }, { owner: unit });
+        const maxAmmo = num(bb['attack@trigger_time'], 18);
+        battle.on('elementBurst', (c) => { // S3: burn bursts refill ammo, up to the skill's ammo
+          const sk = unit.skill;
+          if (c.element !== 'burn' || !sk?.active || sk.kind !== 'ammo' || !on(unit)) return;
+          const n = Math.min(num(bb.ammo_recover), maxAmmo - sk.ammoLeft);
+          if (n > 0) sk.addAmmo(n);
+        }, { owner: unit });
+      },
+    };
+  },
+};