Changelog -- Stage 0: HTML Skeleton

Previous Stage

None. This is the first stage.

Files Changed

File	Change	What and Why
index.html	added	The HTML5 skeleton with doctype, head, and empty body. This is the minimal valid HTML page.

Summary

This stage creates the project's only source file: index.html. It establishes the HTML5 document structure that every future stage builds on. The page is intentionally blank -- the focus is on understanding the required structure, not on visible content.