Xlsx

This handles Excel file operations through Python libraries, using pandas for data analysis and openpyxl for formulas and formatting. The skill enforces zero formula errors and includes a recalc.py script that uses LibreOffice to compute formula values after creation. It's built for financial modeling with specific conventions: blue text for inputs, black for formulas, green for internal links, and proper number formatting (zeros as dashes, negatives in parentheses). The workflow is straightforward: create or modify with openpyxl, save, run the recalculation script, then fix any errors it flags. One catch: you need to use Excel formulas instead of hardcoding calculated values in Python, which keeps spreadsheets dynamic but adds a verification step.