SnowCat 雪猫底层全源码：NapCat 4.18.28 底座 + SnowLuma 能力移植 + V8 通道适配 9.9.37

26 包 monorepo（TS 全源码）：
- snowcat-core: NT 内核 API 封装 + listener（含 9.9.37 六回调适配）+ Packet 发包
- snowcat-onebot: OneBot v11 全动作 + MCP Streamable HTTP 适配器 + 稳定线
- snowcat-webui-frontend/backend: 雪猫控制台（React+HeroUI）
- snowcat-shell: 单文件 bundle 出口（vite inlineDynamicImports）
- snowcat-native: napi2native / MoeHoo / ffmpeg / pty 运行时
- 56 项 SnowLuma 独门动作移植（qzone 全家桶/群相册/装扮/闪照/收藏）
- 工具件: 解包器/启动器/便携制作器/doctor

GitHub 关联已全量指向 DandanLLab/SnowCatQQ

packages/snowcat-core/packet/transformer/system/FetchRkey.ts

@@ -0,0 +1,36 @@
+import * as proto from '@/snowcat-core/packet/transformer/proto';
+import { NapProtoMsg } from 'snowcat-protobuf';
+import { OidbPacket, PacketTransformer } from '@/snowcat-core/packet/transformer/base';
+import OidbBase from '@/snowcat-core/packet/transformer/oidb/oidbBase';
+
+class FetchRkey extends PacketTransformer<typeof proto.OidbSvcTrpcTcp0X9067_202_Rsp_Body> {
+  build (): OidbPacket {
+    const data = new NapProtoMsg(proto.OidbSvcTrpcTcp0X9067_202).encode({
+      reqHead: {
+        common: {
+          requestId: 1,
+          command: 202,
+        },
+        scene: {
+          requestType: 2,
+          businessType: 1,
+          sceneType: 0,
+        },
+        client: {
+          agentType: 2,
+        },
+      },
+      downloadRKeyReq: {
+        key: [10, 20, 2],
+      },
+    });
+    return OidbBase.build(0x9067, 202, data);
+  }
+
+  parse (data: Buffer) {
+    const oidbBody = OidbBase.parse(data).body;
+    return new NapProtoMsg(proto.OidbSvcTrpcTcp0X9067_202_Rsp_Body).decode(oidbBody);
+  }
+}
+
+export default new FetchRkey();

packages/snowcat-core/packet/transformer/system/index.ts

@@ -0,0 +1 @@
+export { default as FetchRkey } from './FetchRkey';