diff --git a/docs/DESIGN.md b/docs/DESIGN.md
index 41c932cb..fffcc72b 100644
--- a/docs/DESIGN.md
+++ b/docs/DESIGN.md
@@ -212,7 +212,7 @@ b.on(event, fn, { priority=0, owner } ) / b.off(...)   // hook bus (§5.4)
 
 ### 5.2 Units & stats
 
-`Unit` fields (minimum): `id` (int, unique per battle), `side` ('ally'|'enemy'), `kind` ('op'|'token'|'enemy'|'device'), `defId`, `ownerId` (playerId; enemies: the field owner / source), `x, y`, `tileR, tileC` (ops), `dir` (allies: UP|RIGHT|DOWN|LEFT deploy direction, §3; `sim/dir.js`), `facing` (derived horizontal sign +1 / −1: LEFT ⇒ −1), `hp`, `alive`, `sp`, `buffs[]`, `statusFlags`, `blocking[]` (ops), `blockedBy` (enemies), `liveRangeGrid` (allies: the 攻击范围 the detail card shows — the running skill's grid, else the unit's own, plus `rangeExtend`; never a kit's target-selection grid, §21.16), `form` (enemies: the model form it is in — UnitInfo `form`, §21.4).
+`Unit` fields (minimum): `id` (int, unique per battle), `side` ('ally'|'enemy'), `kind` ('op'|'token'|'enemy'|'device'), `defId`, `ownerId` (playerId; enemies: the field owner / source), `x, y`, `tileR, tileC` (ops), `dir` (allies: UP|RIGHT|DOWN|LEFT deploy direction, §3; `sim/dir.js`), `facing` (derived horizontal sign +1 / −1: LEFT ⇒ −1), `hp`, `alive`, `sp`, `buffs[]`, `statusFlags`, `blocking[]` (ops), `blockedBy` (enemies), `liveRangeGrid` (allies: the 攻击范围 the detail card shows — the running skill's grid, else the unit's own, plus `rangeExtend`; never a kit's target-selection grid, §21.16), `form` (the model form it is in — an enemy's mode, §21.4, a 傀儡师's 替身 `'doll'`, §22.11 — UnitInfo `form`).
 
 Base stats (from data): `maxHp, atk, def, res` (0–100), `aspd` (100 base), `bat` (base attack time, s), `blockCnt`, `rangeGrid` (ops) / `rangeRadius` (enemies, 0 = melee), `moveSpeed`, `massLevel`, `weight`, `lpr` (enemies), `dmgType` ('phys'|'arts'|'heal'|'true'), `motion` ('WALK'|'FLY'), `cost`, `respawnTime`, `spRecovery`.
 
@@ -420,11 +420,11 @@ S→C:
 - `m.field` — field meta when watching starts: `{ fieldId, kind, rect, stageId, units: [UnitInfo] }` (the units on the field, knocked-out operators waiting to redeploy included — `Battle.fieldMeta`, §18.3)
 - NOTE: game time in `b.snap`/`b.ev` is carried as **`gt`** (the frame's `t` is the message type).
 - `b.snap` — `{ fieldId, gt, units: [[id, x, y, hp, maxHp, sp, spMax, flags, anim]] , dp, killed, total, down?, elem? }` 20 Hz. Optional, only when non-empty (§18.3): `down: [[id, respawnAt (game s), respawnTime (s), state, row, col]]` — knocked-out operators waiting to redeploy, `state` 0 counting | 1 timer done, waiting for DP | 2 timer done, its tile taken — a safeguard, no ally deploys there (sim/constants.js `DOWN_STATE`); `row, col` = the tile it lies on and comes back on (§21.24); `elem: [[id, element, fill, cooldownEnd (game s), cooldown (s)]]` — the one gauge a unit shows: the fullest (ties by the official element id 神经 < 侵蚀 < 灼燃 < 凋亡), fill with 2 decimals rounded DOWN and kept at 0.01–0.99 outside a burst (§20.8); during a 爆发冷却 the bursting element with fill 1 and the cooldown numbers (else 0, 0)
-- `b.ev` — `{ fieldId, ev: [ ... ] }` event tuples: `['spawn', UnitInfo]`, `['atk', srcId, tgtId, projKind]`, `['dmg', tgtId, amount, type]`, `['heal', tgtId, amount]`, `['skill', id, on:0|1]`, `['die', id, reason]` (reason `'killed'`, `'retreat'`, `'expired'` …; only `'killed'` plays an operator's knock-down sound), `['status', id, key, on]`, `['fx', kind, x, y, extra]` (`'hitCap' {id, n}` = a cancelled 限伤 hit, drawn as nothing, §20.12; `extra.form` = the enemy's model form from then on — `shared/protocol.js fxForm`, state like a spawn: never dropped by the client, §21.4), `['layer', playerId, bondId, n]`, `['bounty', playerId, coins]`, `['deploy', id]`
+- `b.ev` — `{ fieldId, ev: [ ... ] }` event tuples: `['spawn', UnitInfo]`, `['atk', srcId, tgtId, projKind]`, `['dmg', tgtId, amount, type]`, `['heal', tgtId, amount]`, `['skill', id, on:0|1]`, `['die', id, reason]` (reason `'killed'`, `'retreat'`, `'expired'` …; only `'killed'` plays an operator's knock-down sound), `['status', id, key, on]`, `['fx', kind, x, y, extra]` (`'hitCap' {id, n}` = a cancelled 限伤 hit, drawn as nothing, §20.12; `extra.form` = the unit's model form from then on (an enemy's mode, a 傀儡师's 替身 §22.11) — `shared/protocol.js fxForm`, state like a spawn: never dropped by the client, §21.4), `['layer', playerId, bondId, n]`, `['bounty', playerId, coins]`, `['deploy', id]`
 - `m.toast {kind, text}` · `m.ticker {text, id, type, priority, playerId}` (the strip plays the highest priority first, §21.10) · `m.emote {playerId, id}` · `m.result {...}`
 - `m.unitStats {seq, round, units: [unitStatsEntry]}` — the answer to `g.unitStats` (`seq` echoed): every own board operator / summon by uid with `{id, uid, defId, hp, alive, maxHp, atk, def, res, interval, blockCnt, moveSpeed, range?, base: {…same}}` (shared/protocol.js `unitStatsEntry`; `range` = an ally's live range grid, facing RIGHT, never a target-selection grid, §21.16) as its next battle starts (§18.5)
 
-`UnitInfo = { id, kind, side, ownerId, defId, name, tier, golden, spine, avatar, x, y, facing, dir, maxHp, skillIndex?, moduleId?, items?, form? }` (`dir` = the ally's deploy direction; the renderer picks the model (Back for UP, mirrored for LEFT) and the ground wedge from it; `skillIndex` = the ally's equipped skill (§16): the renderer plays that skill's Spine clip (`anims.skills[i]`) and the audio its own ON_SKILL_START sound; `moduleId` = an elite ally's equipped module (uniEquipId | 'none'); `items` = an ally operator's equipped item ids (absent without any; never on enemies or summons): the bond popup lists a 变形同构体 wearer from them and the detail card shows its 同构 chip and 装备 (§21.11); all three also on the prep-scouting `m.field` units (`Match.prepFieldMeta`), so a teammate's unit shows its owner's loadout in the detail card; `form` = an enemy's current model form (§21.4, a view built mid-battle starts in it)).
+`UnitInfo = { id, kind, side, ownerId, defId, name, tier, golden, spine, avatar, x, y, facing, dir, maxHp, skillIndex?, moduleId?, items?, form? }` (`dir` = the ally's deploy direction; the renderer picks the model (Back for UP, mirrored for LEFT) and the ground wedge from it; `skillIndex` = the ally's equipped skill (§16): the renderer plays that skill's Spine clip (`anims.skills[i]`) and the audio its own ON_SKILL_START sound; `moduleId` = an elite ally's equipped module (uniEquipId | 'none'); `items` = an ally operator's equipped item ids (absent without any; never on enemies or summons): the bond popup lists a 变形同构体 wearer from them and the detail card shows its 同构 chip and 装备 (§21.11); all three also on the prep-scouting `m.field` units (`Match.prepFieldMeta`), so a teammate's unit shows its owner's loadout in the detail card; `form` = the unit's current model form (an enemy's mode §21.4, a 傀儡师's 替身 §22.11; a view built mid-battle starts in it)).
 
 ### 8.3 Exact view shapes (normative for match ⇄ UI)