excel-author

Generate auditable Excel workbooks with openpyxl for financial modeling.

1|Updated May 12, 2026
One-click install
npx skills add https://github.com/projectedanx/hermes-agent --skill excel-author-projectedanx
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: excel-author
Source: https://github.com/projectedanx/hermes-agent/tree/main/optional-skills/finance/excel-author
Command: npx skills add https://github.com/projectedanx/hermes-agent --skill excel-author-projectedanx

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 that ensure every spreadsheet is auditable, flexible, and easy to review.

Core Features & Use Cases

  • Standardized Formatting: Automatically applies color-coded cell conventions (blue for inputs, black for formulas, green for links) to distinguish assumptions from calculations.
  • Auditability: Enforces the use of named ranges, balance check tabs, and cell comments for every hardcoded input to prevent silent errors.
  • Use Case: Use this to build complex financial models like DCFs, LBOs, or 3-statement models where accuracy and transparency are critical for stakeholders.

Quick Start

Use the excel-author skill to generate a new financial model workbook with a dedicated inputs tab and a balance check sheet.

Frequently Asked Questions about excel-author

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

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

You can build auditable Excel financial models using openpyxl by applying standardized color-coded conventions, named ranges, and automated balance checks. This enforces banker-grade formatting to distinguish hardcoded inputs from formulas, preventing silent errors in professional analysis.

What's the best way to format a spreadsheet for financial modeling audits?

The best way to format a spreadsheet for financial modeling audits is to apply color-coded conventions like blue for inputs, black for formulas, and green for links. Adding cell comments for hardcoded inputs ensures transparency and flexibility for stakeholder review.

Does openpyxl support automated balance checks for 3-statement models?

Yes, openpyxl supports automated balance checks for 3-statement models by generating dedicated balance check sheets within the workbook. This enforces strict auditability and structural integrity across financial statements, ensuring calculations remain accurate.

Can I use Python to generate sensitivity tables in Excel?

Yes, you can use Python to generate sensitivity tables in Excel. By leveraging openpyxl, you can programmatically create structured financial statements and sensitivity tables that support professional analysis and maintain auditable modeling standards.

Why do I need LibreOffice for headless formula recalculation in Excel workbooks?

You need LibreOffice for headless formula recalculation in Excel workbooks to ensure data integrity when generating files with openpyxl. It automatically recalculates formulas outside of Excel, verifying that the generated calculations and balance checks are accurate.

When should I use a Python script for DCF or LBO modeling instead of Excel?

You should use a Python script for DCF or LBO modeling when accuracy and transparency are critical for stakeholders. Automating workbook generation with openpyxl enforces standardized formatting and prevents opaque, error-prone manual spreadsheet construction.