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The xlsx skill is a comprehensive toolkit for handling .xlsx and .csv files within the Claude Code environment, specifically designed for high-stakes spreadsheet tasks. It prioritizes data integrity by enforcing a zero-formula-error policy, supported by a mandatory recalculation script that uses LibreOffice to validate outputs. Beyond basic data manipulation with pandas and openpyxl, it applies rigorous industry standards for financial modeling—including specific color-coding for inputs and formulas—and even integrates AI-powered scientific schematics to enhance visual documentation. This skill is essential for developers and analysts who need to generate publication-quality reports, complex financial models, and automated data pipelines without manual spreadsheet oversight.
