feedback5 CB2: the countdown summons (医疗探机, 诅咒娃娃, 海嗣; 自选 工程蓄水炮, 沙地兽, 打字机, 本能的召唤) take no damage — 活性源石 included —, are never healed, and their bar shows the life left (community report of 2026-10-06 「赫默的无人机、浊心斯卡蒂的海嗣等这种召唤物不会受到外来伤害…血量随时间减少」)

Official: PRTS 斯卡蒂的海嗣 备注 「持有禁疗、无敌」, the token prefabs of 海嗣 and 沙地兽 carry abnormal flags 5 + 7 (无敌,
禁疗), 工程蓄水炮 7 (禁疗); the report describes the official mode for the drone too — [ASSUMED] 无敌 + 禁疗 for the summons
the base prefabs give no flag (医疗探机, 诅咒娃娃, 打字机, 本能的召唤), and the bar as a timer.
Cause: content/tokens.js / the kits only made them untargetable: a 海嗣 on 活性源石 lost 70 of its 100 HP every second, a
hurt drone drew every medic's heals, and the bar was plain HP. Now: COUNTDOWN_SUMMONS / startCountdown (called where each
lifetime is scheduled: tokens.js scheduleLifetime, 浊心斯卡蒂, 温蒂, 莱伊, 鸿雪, 酒神 kits) give 无敌 + 禁疗 and
Unit.countdown; snapshot.js sends hp = maxHp × the share of the life left (the sim HP stays full, so no selector sees a
low-HP summon). Attacked summons (沙之碑, 狼群 …) are unchanged. The 吟游者 trait therefore cannot refill such a bar (item 32).

Golden: snapshot hashes only (the bar) — roster-003, -016, -018, -035, -045, -046, bond-visiShip-low / -high,
boss-boss_1 / 3 / 5 / 7-pair, unite-1; gameplay too — roster-005 (medics no longer heal the drone), roster-037 and
hidden-boss_9-pair (a 海嗣 / drone under enemy and leader damage stays up: fights change).
Tests: test/sim/feedback5-countdown-summons.test.js (7; fails on the parent: no COUNTDOWN_SUMMONS — and there the 海嗣
lost 70 HP to an 活性源石 tick). Docs: SIM.md token pieces, PLAYING.md 作战中.

server/sim/battle/deploy.js

@@ -32,6 +32,7 @@ export class BattleDeploy {
     u.removed = false;
     u.hidden = false;
     u.body = null;
+    u.countdown = null; // a countdown summon's content starts its new life in the deploy hook (content/tokens.js startCountdown)
     u.x = C0; u.y = R0; u.tileR = R0; u.tileC = C0;
     u.blocking = [];
     u.deploySeq = ++this._deploySeq;

server/sim/content/kits/ops/chess_char_6_04-skadi2.js

@@ -4,6 +4,7 @@
 import { aggregateMods } from '../../../buffs.js';
 import { COLS } from '../../../constants.js';
 import { bardRegen } from '../../../professions.js';
+import { startCountdown } from '../../tokens.js';
 import {
   num, bv, tbb, tdesc, moduleBb, parseN, live, enemiesIn, isTok, onDefaultSkill, selectedSkill, aura,
 } from '../shared/tier6.js';
@@ -148,6 +149,7 @@ function skadi2(bb, chess, def) {
           if (t.profile) t.profile.noAttack = true;
           const dur = num(t.def?.talents?.[0]?.bb?.duration, parseN(tdesc(def, 0), /持续(\d+(?:\.\d+)?)秒/, 25));
           const seq = t.deploySeq, r = t.tileR, c = t.tileC;
+          startCountdown(battle, t, dur); // a countdown summon: 无敌, 禁疗, its bar = the life left (content/tokens.js)
           battle.after(dur, () => {
             if (!t.alive || t.deploySeq !== seq) return;
             battle.retreat(t, { reason: 'expired', permanent: true });

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

@@ -44,6 +44,7 @@ import { bodyKeys, bodyInKeys } from '../../../body.js';
 import { toLocal } from '../../../dir.js';
 import { hasHp } from '../../../damage.js';
 import { COLS } from '../../../constants.js';
+import { startCountdown } from '../../tokens.js';
 
 const S1 = 'skchr_bgsnow_1';
 const S2 = 'skchr_bgsnow_2';
@@ -141,9 +142,11 @@ function typewriterKit(t, owner, chess) {
     } }],
     install(battle, unit) {
       if (sk?.id === TS1) installIamb(battle, unit, num(tb.prob), num(tb.atk_scale, 1), skillOn);
-      // 持续25秒: leaves `life` s after each deployment
+      // 持续25秒: leaves `life` s after each deployment — a countdown summon (content/tokens.js startCountdown): 无敌,
+      // 禁疗 [ASSUMED], its bar = the life left
       battle.on('deploy', (ctx) => {
         if (ctx.unit !== unit || !(life > 0)) return;
+        startCountdown(battle, unit, life);
         const seq = unit.deploySeq;
         battle.after(life, () => { if (unit.alive && unit.deploySeq === seq) battle.retreat(unit, { reason: 'expired', permanent: true }); }, { owner: unit });
       }, { owner: unit });

server/sim/content/kits/ops/op-phatm2.js

@@ -63,7 +63,7 @@
 
 import { num, up, traitBb, talentBb, skillRec, once } from '../shared/tier1.js';
 import { isElite, onElementHit, elementDmg } from '../shared/tier6.js';
-import { releaseSkillSummon } from '../../tokens.js';
+import { releaseSkillSummon, startCountdown } from '../../tokens.js';
 import { absoluteRangeKeys } from '../../../targeting.js';
 import { bodyInKeys } from '../../../body.js';
 import { hasHp, burstLocked } from '../../../damage.js';
@@ -124,6 +124,7 @@ function callKit(t, owner, b2) {
         lured = [];
         endAt = battle.time + life;
         atk = owner.s.atk;   // 缓存攻击力: her ATK at the deployment (PRTS 备注)
+        startCountdown(battle, tok, life); // a countdown summon (content/tokens.js): 无敌, 禁疗 [ASSUMED], its bar = the life left
         const seq = tok.deploySeq;
         battle.after(life, () => { if (tok.alive && tok.deploySeq === seq) battle.retreat(tok, { reason: 'expired', permanent: true }); }, { owner: tok });
       }, { owner: tok });

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

@@ -62,6 +62,7 @@ import { acquireTargets, effectiveProfile } from '../../../ai.js';
 import { sortEnemyTargets } from '../../../targeting.js';
 import { bodyInKeys } from '../../../body.js';
 import { PUSH_DIRECTIONAL_MIN_DIST } from '../../../constants.js';
+import { startCountdown } from '../../tokens.js';
 
 const S1 = 'skchr_ray_1';
 const S2 = 'skchr_ray_2';
@@ -225,6 +226,7 @@ export default {
             m.rayBullets = 0;
             m.rayCounted = 0;
             battle.setExtraRange(unit, m.rayAreaKeys);
+            startCountdown(battle, t, life); // a countdown summon (content/tokens.js): its bar = the life left
             const seq = t.deploySeq;
             battle.after(life, () => { if (t.alive && t.deploySeq === seq) battle.retreat(t, { reason: 'expired', permanent: true }); }, { owner: unit });
           }, { owner: unit });

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

@@ -48,6 +48,7 @@
 import { num, traitBb, skillRec, up, giveSp } from '../shared/tier1.js';
 import { absoluteRangeKeys } from '../../../targeting.js';
 import { COLS } from '../../../constants.js';
+import { startCountdown } from '../../tokens.js';
 
 const S1 = 'skchr_weedy_1';
 const S2 = 'skchr_weedy_2';
@@ -174,9 +175,10 @@ function cannonKit(t, owner) {
     },
     install(battle, unit) {
       battle.addBuff(unit, { key: 'trait:weedyCannon', flags: { noHeal: true }, persist: true, allowDead: true });   // 持有禁疗
-      // 部署后20秒自动撤退
+      // 部署后20秒自动撤退 — a countdown summon (content/tokens.js startCountdown): 无敌 [ASSUMED], 禁疗, its bar = the life left
       battle.on('deploy', (ctx) => {
         if (ctx.unit !== unit || !(life > 0)) return;
+        startCountdown(battle, unit, life);
         const seq = unit.deploySeq;
         battle.after(life, () => { if (unit.alive && unit.deploySeq === seq) battle.retreat(unit, { reason: 'expired', permanent: true }); }, { owner: unit });
       }, { owner: unit });

server/sim/content/tokens.js

@@ -5,8 +5,10 @@
 // stats / talents / trait / skill at the owner's phase — a golden owner gets the `_b` variant).
 // Every tokenId of data/tokens.json has a kit, so `battle.spawnToken(owner, tokenId, r, c)` works with data defaults
 // even when the summoner's kit passes no options:
-//   医疗探机      heal profile (data), untargetable, self-destructs after its withdraw skill time (10 s)
-//   诅咒娃娃      no attack, aura: enemies in its range ATK/DEF + bb.atk/bb.def (−25 %/−30 %), 15 s (skill duration);
+//   医疗探机      heal profile (data), untargetable, self-destructs after its withdraw skill time (10 s); a countdown
+//                 summon (COUNTDOWN_SUMMONS: 无敌, 禁疗, its bar = the life left)
+//   诅咒娃娃      no attack, aura: enemies in its range ATK/DEF + bb.atk/bb.def (−25 %/−30 %), 15 s (skill duration; a
+//                 countdown summon);
 //                 leaves when 巫恋 leaves (PRTS 备注) — the drone stays when 赫默 leaves (PRTS 医疗探机 备注)
 //   沙之碑        on appear: owner ATK × atk_scale arts + stun (skill range 3×3), blocks 3 (no attack), talent duration 20 s
 //   战术装备      on appear: stun around (bb.stun), blocked enemies DEF + talent def (−160), talent duration 25 s
@@ -14,7 +16,7 @@
 //   斯卡蒂的海嗣  untargetable range extension of 浊心斯卡蒂: her trait's 生命回复速度 on the allies in its range (owner
 //                 ATK × trait ratio /s);
 //                 while the owner's skill runs: owner ATK × atk_scale true dmg/s to enemies + 鼓舞 owner ATK × bb.atk;
-//                 talent duration 25/30 s, then redeploys after respawnTime (30/25 s, DP cost from data)
+//                 talent duration 25/30 s (a countdown summon), then redeploys after respawnTime (30/25 s, DP cost from data)
 //   “耀阳”        on appear: owner ATK × atk_scale true + stun in the skill grid (+1 hit if the previously deployed
 //                 operator is 卡西米尔); golden trait ×atk_scale vs blocked enemies; lasts while the owner's skill runs
 //   纸偶          on appear: token ATK × damage_scale arts to the 8 surrounding tiles; does not block (data)
@@ -76,6 +78,7 @@
 // makes the token (Battle.spawnToken also refuses summons the owner's loadout does not produce).
 //
 // Exports for other content: spawnYanyou, spawnMapChar, findSummonTile, summonToken, tacticalPoint, wolfShadows,
+// COUNTDOWN_SUMMONS / startCountdown (the countdown summons' 无敌 + 禁疗 and timer bar, shared with the kits that time them),
 // wolfShadowInterval, installWolfTacticalPoint, wolfTacticalPoint, wolfReturnNow (the 狼群's 战术点形态, shared with the
 // 伺夜 kit's own pack, kits/ops/chess_char_3_19-vigil.js), releaseSkillSummon, SKILL_SUMMON_START_DEPLOY, CAT_SHIELD_KEY,
 // TOKEN_IDS; mapCharTalents and touchGospel (Touch's 攫升 / 超脱 and 恳切福音, shared with the Touch 补位 stand-in kit,
@@ -192,10 +195,42 @@ function untargetable(battle, unit) {
   battle.addBuff(unit, { key: 'trait:untargetable', flags: { untargetable: true }, persist: true, allowDead: true });
 }
 
-/** Withdraw the token `seconds` after this deployment (the same deployment only). */
+/**
+ * Countdown summons — the summons that "不会受到攻击" and leave after a fixed time: 赫默's 医疗探机 (10 s, skcom_withdraw),
+ * 巫恋's 诅咒娃娃 (15 s, its skill), 浊心斯卡蒂's 斯卡蒂的海嗣 (talent 远古血亲 25 / 30 s) and, among the 自选 operators, 温蒂's
+ * 工程蓄水炮 (20 s), 莱伊's 沙地兽 (25 s), 鸿雪's “打字机” (25 s) and 酒神's 本能的召唤 (10 s). Community report of 2026-10-06
+ * (the official mode): they take no outside damage — 活性源石 included —, no operator heals them and their bar runs down
+ * like a timer, the summon leaving when it is empty. PRTS / client data: 海嗣 and 沙地兽 hold 无敌 + 禁疗 (PRTS 海嗣 备注
+ * 「持有禁疗、无敌」; token prefabs: abnormal flags 5 + 7), 工程蓄水炮 禁疗 (PRTS 备注); the others have no abnormal flag in the
+ * base-game prefabs — [ASSUMED] the report's 无敌 + 禁疗 for every one of them. startCountdown gives them both (their HP never
+ * moves) and the bar (Unit.countdown, shown by snapshot.js as the share of the life left). The other timed summons (沙之碑,
+ * 战术装备, “小自在”, 结构性原理 …) block and are attacked: their HP stays HP. Until 0.2.0 a 海嗣 on 活性源石 lost 70 HP/s (of
+ * 100) and a hurt drone drew every medic's heals.
+ */
+export const COUNTDOWN_SUMMONS = Object.freeze(new Set([
+  TOKEN_IDS.healDrone, TOKEN_IDS.curseDoll, TOKEN_IDS.seaborn,
+  'token_10009_weedy_cannon', 'token_10034_ray_sndbst', 'token_10026_bgsnow_subbow', 'token_10054_phatm2_encdool',
+]));
+const COUNTDOWN_KEY = 'token:countdown';
+
+/**
+ * A countdown summon's life on the field starts (COUNTDOWN_SUMMONS; call it from the `deploy` hook of each deployment,
+ * where its kit schedules its withdrawal): `seconds` from now its bar is empty. It holds 无敌 and 禁疗 from then on. A
+ * summon that is not a countdown one is left alone (false).
+ */
+export function startCountdown(battle, unit, seconds) {
+  const s = num(seconds, 0);
+  if (!unit || !COUNTDOWN_SUMMONS.has(unit.defId) || !(s > 0)) return false;
+  unit.countdown = { from: battle.time, until: battle.time + s };
+  if (!unit.findBuff(COUNTDOWN_KEY)) battle.addBuff(unit, { key: COUNTDOWN_KEY, flags: { invulnerable: true, noHeal: true, healFree: true }, persist: true, allowDead: true });
+  return true;
+}
+
+/** Withdraw the token `seconds` after this deployment (the same deployment only); a countdown summon's bar runs with it. */
 function scheduleLifetime(battle, unit, seconds) {
   const s = num(seconds, 0);
   if (!(s > 0)) return;
+  startCountdown(battle, unit, s);
   const seq = unit.deploySeq;
   unit.mem.expiresAt = battle.time + s;
   battle.after(s, () => { if (unit.alive && unit.deploySeq === seq) battle.retreat(unit, { reason: 'expired', permanent: true }); }, { owner: unit });

server/sim/snapshot.js

@@ -1,6 +1,7 @@
 // server/sim/snapshot.js — compact serialization for clients (DESIGN §8.2).
 //
 // b.snap  = { fieldId, t, units: [[id, x, y, hp, maxHp, sp, spMax, flags, anim]], dp, killed, total }
+//   (hp of a countdown summon — unit.countdown, content/tokens.js startCountdown — is maxHp × the share of its life left)
 // UnitInfo = { id, kind, side, ownerId, defId, name, tier, golden, spine, avatar, x, y, facing, dir, maxHp, motion?, boss?, uid?,
 //   form?, skillIndex?, moduleId?, items?, standInFor?, diy? }  (standInFor = the replaced operator's charId of a 补位
 //   stand-in; diy = a 自选 piece's pick { charId, skillIndex, uniEquipId } — defId is its slot, spine / avatar the operator's;
@@ -107,9 +108,13 @@ export function unitTuple(u, t) {
       sp = spMax * (sk.timeLeft / sk.duration);
     }
   }
-  // hp is rounded up (a living unit never shows 0) but never above the rounded max HP
+  // hp is rounded up (a living unit never shows 0) but never above the rounded max HP. A countdown summon (医疗探机, 海嗣 …:
+  // content/tokens.js startCountdown) shows the share of its life left instead — its bar runs down like a timer and it
+  // leaves when it is empty (community report of 2026-10-06; its HP itself never moves: 无敌, 禁疗)
   const maxHp = Math.max(1, Math.round(u.s.maxHp));
-  const hp = u.alive ? Math.min(Math.max(1, Math.ceil(u.hp)), maxHp) : 0;
+  const cd = u.alive ? u.countdown : null;
+  const left = cd ? Math.max(0, Math.min(1, (cd.until - t) / Math.max(1e-9, cd.until - cd.from))) : 1;
+  const hp = u.alive ? Math.min(Math.max(1, Math.ceil(cd ? maxHp * left : u.hp)), maxHp) : 0;
   return [u.id, r2(u.x), r2(u.y), hp, maxHp, r1(sp), spMax, flagsOf(u), animOf(u, t)];
 }
 

server/sim/units.js

@@ -81,6 +81,9 @@ export class Unit {
     this.burstPending = null;   // { [element]: true } while that element's burst resolves (damage.js burstLocked)
     this.tags = new Set(init.tags || []);
     this.mem = {};              // free scratch space for content (per unit)
+    // a countdown summon's life on the field ({ from, until } battle times; content/tokens.js startCountdown, cleared by
+    // every deployment): its bar shows the time left (snapshot.js unitTuple), its HP never moves (无敌 + 禁疗)
+    this.countdown = null;
     this.trait = {};            // profession runtime state
     this.stats = { dmg: 0, kills: 0, heal: 0, taken: 0, attacks: 0 };
     this.hidden = false;        // enemies inside a DISAPPEAR segment