Create, edit, analyze, or convert Excel spreadsheets (.xlsx, .xlsm, .xltx) where the workbook file is the primary deliverable. Use for formulas, formatting, financial models, multi-sheet workbooks, and tabular cleanup exported to Excel. Also applies to .csv/.tsv when the user wants spreadsheet output.
Install
npx skills add K-Dense-AI/claude-scientific-writer --skill xlsxnpx skills add K-Dense-AI/claude-scientific-writer --skill xlsx -a claude-code -gnpx skills add K-Dense-AI/claude-scientific-writer --skill xlsx -a codex -ggemini skills install https://github.com/K-Dense-AI/claude-scientific-writer.git --path skills/xlsxgh skill install K-Dense-AI/claude-scientific-writer xlsxgit clone --depth 1 https://github.com/K-Dense-AI/claude-scientific-writer /tmp/K-Dense-AI__claude-scientific-writer
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/K-Dense-AI__claude-scientific-writer/skills/xlsx ~/.claude/skills/xlsx # Claude Code
cp -R /tmp/K-Dense-AI__claude-scientific-writer/skills/xlsx ~/.agents/skills/xlsx # Codex, Cursor, Gemini CLI, Copilot, OpenCode