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xlsx

Convert and clean spreadsheet files into formula-driven Excel workbooks.

Updated May 15, 2026
Search Tags:#financial modeling#xlsx#data cleaning#csv to xlsx#LibreOffice recalculation#excel formulas
One-click install
npx skills add https://github.com/lth0/codexSkill --skill xlsx-lth0
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: xlsx
Source: https://github.com/lth0/codexSkill/tree/main/skills/agents/xlsx
Command: npx skills add https://github.com/lth0/codexSkill --skill xlsx-lth0

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes scripts (resource) components.

What problem does it solve?

This Skill removes the friction of working with messy or incorrect spreadsheet files by helping you open, restructure, compute, and repair .xlsx/.xlsm/.csv/.tsv inputs into a clean spreadsheet deliverable.

Core Features & Use Cases

  • Spreadsheet repair and cleanup: Fix malformed or poorly structured tabular files by reorganizing headers, cleaning rows, and producing a valid workbook.
  • Spreadsheet creation and transformation: Build new spreadsheets from scratch or convert between tabular formats while ensuring the output remains a true spreadsheet file.
  • Formula correctness with guardrails: Produce Excel formulas (not Python hardcodes) and enforce zero error requirements like #REF!, #DIV/0!, #VALUE!, and #N/A, including mandatory LibreOffice recalculation for evaluation.
  • Financial-model formatting & safety: Apply valuation/financial conventions such as input/link color coding, number formats, assumption placement, and parentheses for negatives.

Quick Start

Use the xlsx skill to convert and clean the spreadsheet file 'budget.csv' into a formatted and fully formula-driven 'budget.xlsx' with zero formula errors.

Frequently Asked Questions about xlsx

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

FAQPage Schema
How do I convert a CSV file to a formatted Excel workbook with working formulas?▼

To convert a CSV file to an Excel workbook, the xlsx skill restructures tabular inputs and generates a formatted .xlsx deliverable. It enforces dynamic integrity by applying Excel formulas instead of hardcoded values and verifying zero formula errors.

What is the best way to clean and repair messy spreadsheet data with formula errors?▼

Cleaning messy spreadsheet data involves reorganizing headers, fixing malformed rows, and rebuilding the file structure. The process enforces formula correctness by detecting #REF!, #DIV/0!, #VALUE!, and #N/A errors, requiring LibreOffice recalculation to validate zero errors.

Can I build a financial model in Excel with standard formatting and input color coding?▼

Yes, building financial models in Excel supports valuation conventions including input and link color coding, specific number formats, assumption placement, and parentheses for negatives. It ensures the structural safety required for accurate financial modeling.

Does converting files to .xlsx require LibreOffice for formula recalculation?▼

Yes, updating spreadsheet files requires LibreOffice-based formula recalculation to evaluate dynamic spreadsheet integrity. This ensures all generated Excel formulas compute correctly and enforces a strict zero Excel error detection requirement for the final output.

What spreadsheet file formats can I open, clean, and convert into a valid workbook?▼

You can open, clean, and convert .xlsx, .xlsm, .csv, and .tsv file formats. The process repairs poorly structured tabular files by cleaning rows and headers, ultimately producing a valid and fully formatted Excel workbook deliverable.

Why does my spreadsheet conversion output hardcoded values instead of Excel formulas?▼

Hardcoded values often result from incorrect spreadsheet conversion methods. The xlsx skill prevents this by enforcing dynamic spreadsheet integrity, mandating that outputs contain functional Excel formulas rather than static computed values, verified through LibreOffice recalculation.

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