Edit and create Excel (.xlsx) files while preserving original formatting, merged cells, and styles. Use when working with Excel files, spreadsheets, .xlsx files, or when the user mentions editing Excel without destroying formatting.
A document-assembly skill that combines completed chapters and exercises into one Markdown textbook, with a cover, contents page, consistent formatting, and optional learning roadmap.
Use when the user wants to share a project to GitHub. Runs a full pipeline: root audit, file naming and structure, document fixes (headings, code-block language tags, table alignment, explicit command interpreters), generate missing files (LICENSE, .gitignore, CONTRIBUTING.md, Issue/PR templates), README rewrite…