What problem does it solve? Editing Excel workbooks programmatically is error-prone: DRM-protected files fail with cryptic errors, formulas don't evaluate, and one-off edits are slow. This Skill provides a structured inspect-then-batch-edit workflow for .xlsx files that handles these pitfalls. ## Core Features & Use Cases - Workbook Inspection: Examine sheet names, dimensions, headers, sample data, formulas, charts, merged cells, and filters before making changes. - Batch Editing: Apply multiple operations in one call — update cells, find-replace, add/insert/delete rows, and copy/rename/delete sheets. - Workbook Creation: Build new .xlsx files with multiple sheets, charts, formulas, conditional formatting, and freeze panes. - DRM Handling: Detect, strip, and re-apply IRM protection on Microsoft files via COM automation. - Use Case: Download a status tracker from SharePoint, update dozens of cells and append new log rows in a single batch operation, then upload the edited workbook back. ## Quick Start Ask your agent to inspect the workbook at output/report.xlsx and update the status column for all rows marked At Risk.