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-onebot/action/extends/SetGroupSign.ts

@@ -0,0 +1,37 @@
+import { GetPacketStatusDepends } from '@/snowcat-onebot/action/packet/GetPacketStatus';
+import { ActionName } from '@/snowcat-onebot/action/router';
+import { Static, Type } from '@sinclair/typebox';
+
+const PayloadSchema = Type.Object({
+  group_id: Type.String({ description: '群号' }),
+});
+
+type PayloadType = Static<typeof PayloadSchema>;
+
+const ReturnSchema = Type.Void({ description: '打卡结果' });
+
+type ReturnType = Static<typeof ReturnSchema>;
+
+class SetGroupSignBase extends GetPacketStatusDepends<PayloadType, ReturnType> {
+  override payloadSchema = PayloadSchema;
+  override returnSchema = ReturnSchema;
+  override actionSummary = '群打卡';
+  override actionTags = ['群组扩展'];
+  override payloadExample = {
+    group_id: '123456789',
+  };
+
+  override returnExample = null;
+
+  async _handle (payload: PayloadType) {
+    return await this.core.apis.PacketApi.pkt.operation.GroupSign(+payload.group_id);
+  }
+}
+
+export class SetGroupSign extends SetGroupSignBase {
+  override actionName = ActionName.SetGroupSign;
+}
+
+export class SendGroupSign extends SetGroupSignBase {
+  override actionName = ActionName.SendGroupSign;
+}