diff --git a/TODO.md b/TODO.md
index 54c66c52..954e8d70 100644
--- a/TODO.md
+++ b/TODO.md
@@ -7,8 +7,11 @@ https://zhuanlan.zhihu.com/p/39369370
 - [ ] Move `CopyStream`(GacUI) and `GenerateToStream`(Workflow) to Vlpp and refactor in everywhere including using or copying.
 - [x] Add partial ordering to Vlpp and refactor
   - [x] CodePack `SortDependencies` function
-  - [ ] Workflow `WfCppConfig::SortInternal` function
-  - [ ] Workflow `PostCollect` function
+  - [ ] Workflow `WfCppConfig::SortInternal` and `PostCollect` function
+    - [ ] Write all enums and structs before all classes, regardless they are declared inside a class or not.
+      - All names after `__vwsn_(enum|struct)_<all-levels-of-parent-classes>_name`.
+      - All generate `using name = __vwsn_(enum|struct)_<all-levels-of-parent-classes>_name` in the right place.
+    - [ ] Check if inheritance relationships satisfy C++'s declare-before-use rule.
   - [x] Workflow `StructRecursivelyIncludeItself` `DuplicatedBaseInterface` errors
   - [ ] `GacBuild.ps1`
 - [ ] Workflow Codegen