Xlsx Author

When you're running Claude in headless mode and need to produce an Excel file as an artifact rather than editing a live workbook, this skill drops a Python script that uses openpyxl to generate the .xlsx in an ./out directory. It follows the same conventions as audit-xls: blue for hardcoded inputs, black for formulas, green for links, with everything structured around an Inputs tab and a Checks tab for balance ties. The documentation is clear about when not to use it, which is helpful. If the mcp__office__excel tools are available in Cowork plugin mode, use those instead since they let users review changes in real time. This is the file producing fallback for managed agent sessions.

Install to Claude Code

npx -y skills add anthropics/financial-services-plugins --skill xlsx-author --agent claude-code