diff --git a/client/tests/test_consistency.js b/client/tests/test_consistency.js
new file mode 100644
index 0000000..7ee45c6
--- /dev/null
+++ b/client/tests/test_consistency.js
@@ -0,0 +1,95 @@
+// 【核心验收】增量累积的 GameState 必须与 deskinfo 全量重建的完全相等
+const fs = require('fs');
+const path = require('path');
+const { ROOT, load } = require('./_load');
+const t = require('./_assert')();
+
+load('client/js/gameabc-framework/system/EventBus.js');
+load('client/js/01_SubGame/codes/state/Events.js');
+load('client/js/01_SubGame/codes/state/GameState.js');
+load('client/js/01_SubGame/codes/state/RoomOptions.js');
+load('client/js/01_SubGame/codes/net/handlers/DealHandler.js');
+load('client/js/01_SubGame/codes/net/handlers/CallHandler.js');
+load('client/js/01_SubGame/codes/net/handlers/MainHandler.js');
+load('client/js/01_SubGame/codes/net/handlers/BuryHandler.js');
+load('client/js/01_SubGame/codes/net/handlers/PlayHandler.js');
+load('client/js/01_SubGame/codes/net/handlers/QueryHandler.js');
+load('client/js/01_SubGame/codes/net/handlers/ReadyHandler.js');
+load('client/js/01_SubGame/codes/net/handlers/ResultHandler.js');
+load('client/js/01_SubGame/codes/net/handlers/ResyncHandler.js');
+load('client/js/01_SubGame/codes/net/Dispatcher.js');
+
+const fx = JSON.parse(fs.readFileSync(path.join(ROOT, 'client/tests/fixtures/packets.json'), 'utf8'));
+
+// 这些字段是「一次性事件」或「重连不重放」的，不参与一致性比对。
+// 每加一条都必须写清理由——这个白名单是本测试唯一的松口处，滥用它等于废掉这条守卫。
+const EXCLUDE = [
+    // 70 分坐庄的 3 秒开底是上庄时的一次性事件，协议明确 deskinfo 不重放
+    'table.ancard3s',
+    // 本轮必出牌只对当前轮有效；deskinfo 仅在轮到本家时才带 mustcard
+    'my.mustCard',
+    // 结算明细来自 jiesuan 包，deskinfo 的 Balance 只在结算阶段带 aset
+    'result.chupai', 'result.bottom', 'result.account'
+];
+
+function pick(snap, exclude) {
+    const out = JSON.parse(JSON.stringify(snap));
+    exclude.forEach(p => {
+        const parts = p.split('.');
+        let o = out;
+        for (let i = 0; i < parts.length - 1; i++) { o = o && o[parts[i]]; }
+        if (o) { delete o[parts[parts.length - 1]]; }
+    });
+    return out;
+}
+
+// 对每个座位、每个 deskinfo 快照点做比对
+let compared = 0;
+fx.deskinfo.forEach(snapPoint => {
+    const seat = snapPoint.seat;
+
+    // —— 路径 A：增量累积 ——
+    EQW_GameState.reset();
+    EQW_GameState.room.mySeat = seat;
+    EQW_GameState.room.options = EQW_RoomOptions_Parse.parse(fx.roomtype);
+    fx.seats[seat].slice(0, snapPoint.packetIndex).forEach(p => {
+        EQW_Dispatcher.dispatch({ rpc: p.rpc, data: p.data });
+    });
+    const incremental = EQW_GameState.snapshot();
+
+    // —— 路径 B：deskinfo 全量重建 ——
+    EQW_GameState.reset();
+    EQW_GameState.room.mySeat = seat;
+    EQW_GameState.room.options = EQW_RoomOptions_Parse.parse(fx.roomtype);
+    EQW_ResyncHandler.handleDeskinfo(snapPoint.info);
+    const full = EQW_GameState.snapshot();
+
+    t.eq('座位' + seat + ' step' + snapPoint.step + ' 增量 == 全量',
+         pick(incremental, EXCLUDE), pick(full, EXCLUDE));
+    compared++;
+});
+
+t.eq('比对点数量 > 0', compared > 0, true);
+
+// ================= Ruling 3：step3（埋牌）deskinfo 直读断言 =================
+// 一致性比对无法单独覆盖 ResyncHandler._applyBuryCards 的字段映射正确性——
+// 若增量路径压根不写某字段，两边可能「同为初始值」而比对照样绿。
+// 这里独立取 step3 快照，逐字段直读 GameState 并核对具体值。
+const step3 = fx.deskinfo.filter(d => d.step === 3)[0];
+if (!step3) {
+    console.warn('[test_consistency] 夹具里没有 step3 快照，Ruling 3 的直读断言无法执行');
+} else {
+    EQW_GameState.reset();
+    EQW_ResyncHandler.handleDeskinfo(step3.info);
+    const bc = step3.info.BuryCards;
+    t.eq('step3 直读 aset.banker', EQW_GameState.aset.banker, bc.banker);
+    t.eq('step3 直读 aset.call', EQW_GameState.aset.call, bc.call);
+    t.eq('step3 直读 aset.multiple', EQW_GameState.aset.multiple, bc.multiple);
+    t.eq('step3 直读 aset.flower', EQW_GameState.aset.flower, bc.flower);
+    t.eq('step3 直读 my.bottomCards', EQW_GameState.my.bottomCards, bc.bottomcards);
+    t.eq('step3 直读 turn.countdown', EQW_GameState.turn.countdown, bc.countdown);
+    t.eq('step3 直读 turn.seat（埋牌由庄家做）', EQW_GameState.turn.seat, bc.banker);
+    t.eq('step3 直读 aset.step', EQW_GameState.aset.step, step3.info.step);
+}
+
+process.exit(t.done('consistency') ? 0 : 1);