xlsx

Clean, restructure, and convert tabular files into formatted Excel spreadsheets.

Updated Aug 27, 2026
One-click install
npx skills add https://github.com/stellarone/evaluate --skill xlsx-stellarone
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: xlsx
Source: https://github.com/stellarone/evaluate/tree/main/.agents/skills/xlsx
Command: npx skills add https://github.com/stellarone/evaluate --skill xlsx-stellarone

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes scripts (resource) components.

What problem does it solve?

This Skill helps you work with spreadsheet files (.xlsx/.xlsm/.csv/.tsv) end-to-end—opening, fixing, restructuring messy data, updating templates, performing analysis, and producing a correct spreadsheet output.

Core Features & Use Cases

  • Spreadsheet-safe updates with guardrails: Uses Excel formulas (not Python hardcoding), enforces zero formula errors, and preserves existing template formatting when editing.
  • Messy data cleaning and restructuring: Fixes malformed tables, misplaced headers, and junk rows to produce a valid, usable spreadsheet.
  • File conversion and tabular transformation: Converts between tabular formats and generates new spreadsheets from provided tabular data.

Quick Start

Use the xlsx skill to clean and convert the attached file 'messy-data.csv' into a well-structured 'cleaned.xlsx' spreadsheet.

Frequently Asked Questions about xlsx

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

FAQPage Schema
How do I convert a messy CSV file to a clean xlsx spreadsheet while preserving formatting?

Converting a messy CSV to a clean xlsx file involves ingesting the tabular data, fixing misplaced headers and junk rows, applying data restructuring, and outputting a properly formatted spreadsheet using Excel formulas instead of hardcoded values.

How do I fix Excel formula errors when updating an existing spreadsheet template?

Fixing Excel formula errors during template updates requires using Excel formulas rather than hardcoded computed values and validating the output with LibreOffice recalculation to enforce zero formula errors while preserving existing template formats.

What is the best way to clean and restructure malformed tabular data for financial modeling?

Cleaning malformed tabular data for financial modeling involves identifying misplaced headers and junk rows, restructuring the tables into a valid format, and applying formula-driven transformations to produce a usable spreadsheet output.

Can I update an .xlsm spreadsheet template without losing its existing formatting and formulas?

Updating an .xlsm template without losing formatting is possible by applying spreadsheet-safe updates that use Excel formulas rather than Python hardcoding, preserving existing template formats, and enforcing professional Excel output formatting conventions.

Does spreadsheet repair work with tabular formats like .tsv and .csv?

Spreadsheet repair works with .tsv and .csv formats by ingesting the tabular files, applying data cleaning and restructuring to fix malformed tables, and delivering the final repaired result as a valid spreadsheet file.

Why does my generated spreadsheet contain hardcoded values instead of live formulas?

Spreadsheets contain hardcoded values instead of live formulas when computed results are injected directly; using Excel formulas for transformations and validating via LibreOffice recalculation ensures the final deliverable maintains functional spreadsheet formulas.