xlsx

Originally fromanthropics/skills
Installation
Summary

Create, edit, and analyze spreadsheets with formulas, formatting, and data operations.

  • Supports reading, creating, and modifying .xlsx, .xlsm, .csv, and .tsv files with full formula preservation and recalculation
  • Includes financial modeling standards: color-coded text conventions (blue for inputs, black for formulas, green for internal links, red for external links), standardized number formatting, and assumption-based formula construction
  • Provides data analysis capabilities via pandas for statistics, visualization, and bulk operations, and openpyxl for complex formatting and formula-driven spreadsheets
  • Automatically recalculates all formulas and scans for errors (#REF!, #DIV/0!, #VALUE!, #N/A, #NAME?) using the included recalc.py script with LibreOffice integration
SKILL.md

Requirements for Outputs

All Excel files

Professional Font

  • Use a consistent, professional font (e.g., Arial, Times New Roman) for all deliverables unless otherwise instructed by the user

Zero Formula Errors

  • Every Excel model MUST be delivered with ZERO formula errors (#REF!, #DIV/0!, #VALUE!, #N/A, #NAME?)

Preserve Existing Templates (when updating templates)

  • Study and EXACTLY match existing format, style, and conventions when modifying files
  • Never impose standardized formatting on files with established patterns
  • Existing template conventions ALWAYS override these guidelines

Financial models

Color Coding Standards

Unless otherwise stated by the user or existing template

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Installs
651
GitHub Stars
27.2K
First Seen
Jan 21, 2026