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/oidb/oidbBase.ts

@@ -0,0 +1,28 @@
+import * as proto from '@/snowcat-core/packet/transformer/proto';
+import { NapProtoMsg } from 'snowcat-protobuf';
+import { OidbPacket, PacketBufBuilder, PacketTransformer } from '@/snowcat-core/packet/transformer/base';
+
+class OidbBase extends PacketTransformer<typeof proto.OidbSvcTrpcTcpBase> {
+  build (cmd: number, subCmd: number, body: Uint8Array, isUid: boolean = true, _isLafter: boolean = false): OidbPacket {
+    const data = new NapProtoMsg(proto.OidbSvcTrpcTcpBase).encode({
+      command: cmd,
+      subCommand: subCmd,
+      body,
+      isReserved: isUid ? 1 : 0,
+    });
+    return {
+      cmd: `OidbSvcTrpcTcp.0x${cmd.toString(16).toUpperCase()}_${subCmd}`,
+      data: PacketBufBuilder(data),
+    };
+  }
+
+  parse (data: Buffer) {
+    const res = new NapProtoMsg(proto.OidbSvcTrpcTcpBase).decode(data);
+    if (res.errorCode !== 0) {
+      throw new Error(`OidbSvcTrpcTcpBase parse error: ${res.errorMsg} (code=${res.errorCode})`);
+    }
+    return res;
+  }
+}
+
+export default new OidbBase();