doc-coauthoring

Guide users through a structured workflow for co-authoring documentation. Use when user wants to "write a doc", "draft a proposal", "create a spec", "co-author document", "共同編輯文件", "協作撰寫", "文件協作", or discusses writing documentation, proposals, technical specs, decision docs, or similar structured content. This workflow helps users efficiently transfer context, refine content through iteration, and verify the doc works for readers.