"Take this CSV of last month's sales, build a P&L by region with a chart, and highlight regions below target in red." Claude builds the workbook — you open it in Numbers or Excel and present.
Works great with the Supabase connector for analytics pulled straight from your DB.
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The official XLSX skill speaks openpyxl semantics:
- Multi-sheet workbooks with named ranges
- Formulas, including array formulas and SUMIFS chains
- Pivot tables and chart objects
- Conditional formatting and data validation
- Frozen panes, merged cells, table styles
Synced via Terminal Sync to ~/.claude/skills/xlsx/ across all your Macs.