Why is the architecture of COLA missing?

我们鼓励使用英文，如果不能直接使用，可以使用翻译软件，您仍旧可以保留中文原文。
We recommend using English. If you are non-native English speaker, you can use the translation software.

**Describe what problem you have encountered**
A clear and concise description of what you want to do.

The issue contains only the report template and does not identify an architecture document, source directory, entry point, or expected content. First clarify which COLA architecture needs documenting and where the documentation belongs; completion criteria are not provided.

Written by the indexing model from the issue text.