Can I use this for professional financial modeling?

Absolutely. It follows industry-standard color conventions, such as blue text for hardcoded inputs and black for formulas, and requires strict currency and number formatting.

How does it handle formula errors like #DIV/0! or #REF!?

The skill includes a mandatory verification step using a recalculation script that scans all cells for errors and provides a detailed summary for immediate correction.

Does this skill support existing Excel templates?

Yes, it is specifically designed to study and match existing formats, styles, and conventions when modifying files to ensure consistency with your established patterns.

Does it calculate values in Python or use Excel formulas?

It prioritizes native Excel formulas over hardcoded Python values to ensure the resulting spreadsheet remains dynamic and recalculates correctly when data changes.

Excel & Spreadsheet Power-User

Name: Excel & Spreadsheet Power-User
Author: EricGrill

byEricGrill

•

Productivity & Workflow

Manages comprehensive spreadsheet creation, editing, and analysis with professional financial modeling standards and automated formula recalculation.

This skill empowers Claude to handle complex Excel tasks ranging from professional financial modeling to large-scale data analysis. It enforces industry-standard formatting conventions—such as color-coded inputs and formula-first construction—to ensure spreadsheets remain dynamic and audit-ready. By leveraging pandas for data manipulation and openpyxl for precision formatting, combined with a LibreOffice-based recalculation engine, it guarantees zero-error outputs and seamless integration with existing corporate templates.

Key Features

01Dual-engine support using pandas for data analysis and openpyxl for stylistic precision

022 GitHub stars

03Strict adherence to financial modeling standards including color-coded inputs and formula conventions

04Automated formula recalculation and error verification using LibreOffice integration

05Preservation of existing styles, formatting, and templates during file modification

06Comprehensive support for .xlsx, .xlsm, .csv, and .tsv formats with formula error prevention

Use Cases

01Performing bulk data analysis on large spreadsheets and exporting results into formatted reports

02Updating legacy corporate templates while maintaining strict established style guides and cell references

03Building dynamic financial models with automated growth rates, multiples, and scenario analysis

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add ericgrill/agents-skills-plugins xlsx

For use in Claude.ai and ChatGPT

Download Skill