Document XLSX Skill - Quick Reference

This skill enables creation, editing, inspection, and safe distribution of .xlsx workbooks. Use it for report exports, spreadsheet models, spreadsheet QA, workbook automation, and Excel-compatible deliverables.

Modern best practices (July 2026):

• Prefer Excel Tables over loose ranges.
• Separate inputs, calculations, and outputs.
• Treat spreadsheets as software: checks, owners, change control, and review loops.
• Treat untrusted workbooks as hostile: formulas, hyperlinks, external links, hidden content, and macros all need review.
• If workbooks are shared externally, include accessibility hygiene and run Excel's Accessibility Checker.

Core Decision Rules (2026)