chore: initial commit

tmp/extract_hotlist/references/implementation-notes.md

@@ -0,0 +1,8 @@
+## Implementation Notes
+
+- skill_name: extract_hotlist
+- tool: extract_hotlist
+- args: top_n
+- artifact_fields: source, sheet_name, columns, rows, data
+- generator: main.go
+- 说明: 保持脚本业务逻辑不变，仅包装与文档产出。