Writes professional, user-friendly technical documentation for repositories and documentation websites — READMEs, tutorials, quickstarts, API reference guides, release notes, troubleshooting docs, and structured docs-site content. Use when the user asks to "write a README", "create API documentation", "draft release notes", "write a tutorial", "structure documentation", or "review docs for clarity", or when working with .md files in docs/ directories, README files, documentation structure, style guides, or content organization. Optimized for both repo docs (README, CONTRIBUTING, CHANGELOG, docs/ layout) and docs websites (Docusaurus, VitePress, MkDocs with frontmatter and…