feat: 新增 account 和 plan 目录

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

account/admin/skills/system/get-memory-stats/SKILL.md

@@ -0,0 +1,29 @@
+---
+name: get-memory-stats
+description: Get memory system statistics including total count and breakdown by type. When you need to check memory usage or understand memory distribution.
+system: true
+handler: memory
+tool-name: get_memory_stats
+category: Memory
+---
+
+# Get Memory Stats
+
+获取记忆系统统计信息。
+
+## Parameters
+
+无参数。
+
+## Returns
+
+- 总记忆数量
+- 今日会话数
+- 待处理会话数
+- 按类型分布
+- 按优先级分布
+
+## Related Skills
+
+- `add-memory`: 添加记忆
+- `search-memory`: 搜索记忆