xlsx-author Use this skill when running headless (managed-agent / CMA mode) and you need to deliver an Excel workbook as a file artifact rather than editing a live workbook via . Output contract - Write to . Create if it does not exist. - Return the relative path in your final message so the orchestration layer can collect it. How to build the workbook Write a short Python script and run it with Bash. Use : Conventions (mirror ) - Blue / black / green. Blue = hardcoded input, black = formula, green = link to another sheet/file. - No hardcodes in calc cells. Every calculation cell is a formula…