excel-author

Generate auditable financial workbooks with openpyxl and strict modeling conventions.

Updated May 4, 2026
One-click install
npx skills add https://github.com/InverterNetwork/hermes-agent --skill excel-author-inverternetwork
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: excel-author
Source: https://github.com/InverterNetwork/hermes-agent/tree/main/optional-skills/finance/excel-author
Command: npx skills add https://github.com/InverterNetwork/hermes-agent --skill excel-author-inverternetwork

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill requires openpyxl, and includes scripts (resource) components.

What problem does it solve?

This skill solves the issue of opaque, error-prone financial modeling by enforcing strict, banker-grade conventions for headless spreadsheet generation.

Core Features & Use Cases

  • Auditable Structure: Enforces color-coded cell standards (blue for inputs, black for formulas, green for links) to ensure transparency.
  • Automated Integrity: Includes built-in balance checks and sensitivity table generation to prevent common modeling errors.
  • Use Case: Use this to generate a complex DCF or 3-statement model where every assumption is documented with a source comment and every calculation is a live, reviewable formula.

Quick Start

Use the excel-author skill to generate a new financial model workbook based on the provided revenue and growth assumptions.

Frequently Asked Questions about excel-author

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I generate auditable financial models in Excel using openpyxl?

You can generate auditable financial models using openpyxl by programmatically constructing live formulas with banker-grade color-coded conventions for inputs, calculations, and external links. This approach enforces structural transparency and prevents opaque spreadsheet errors.

Can I build a DCF or LBO model programmatically without opening Excel?

Yes, you can build DCF, LBO, and 3-statement models programmatically without opening Excel. The skill generates workbooks headlessly using openpyxl for formula construction and LibreOffice to recalculate the resulting formulas.

Does openpyxl support live formulas and balance checks for 3-statement analyses?

Yes, openpyxl supports writing live formulas for 3-statement analyses, and the skill enforces automated integrity by injecting built-in balance checks and generating sensitivity tables to catch common modeling errors.

What is the best way to document revenue and growth assumptions in a financial spreadsheet?

The best way to document assumptions in a financial spreadsheet is enforcing strict modeling conventions that color-code inputs and attach source comments directly to cells. This ensures every revenue and growth assumption remains transparent and auditable.

Do I need LibreOffice to recalculate headless spreadsheet formulas?

Yes, you need LibreOffice for headless formula recalculation. While openpyxl constructs and writes the spreadsheet formulas programmatically, LibreOffice is required to execute the recalculation process outside a traditional Excel environment.

Why use programmatic spreadsheet generation over manual Excel for complex financial modeling?

Programmatic spreadsheet generation prevents error-prone manual entry by enforcing strict, banker-grade conventions for formula construction and automated integrity checks. It ensures complex financial models remain auditable with documented sources and reviewable calculations.