xlsx
This skill contains shell command directives (!`command`) that may execute system commands. Review carefully before installing.
XLSX Skill
Create, read, and edit Excel workbooks — formulas, formatting, charts, data cleaning, and format conversion. Every formula-bearing output must be recalculated and error-free before delivery.
When to Use
Use this skill any time a spreadsheet file is the primary input or output: opening, reading, editing, or fixing an existing .xlsx, .xlsm, .xltx, .csv, or .tsv file; creating a new spreadsheet from scratch or from other data; converting between tabular formats; cleaning messy tabular data into a proper spreadsheet. Trigger whenever the user references a spreadsheet file by name or path — even casually. Do NOT trigger when the deliverable is a Word document (docx skill), HTML report, standalone script, or Google Sheets API integration. For finance-grade modeling conventions (DCF, LBO, three-statement), the optional excel-author skill adds stricter standards on top of this one.
Prerequisites
pip install openpyxl pandas "markitdown[xlsx]"
which soffice || sudo apt install -y libreoffice # formula recalculation (scripts/recalc.py)
macOS: brew install libreoffice.