| name | xlsx |
| description | Work with spreadsheet workbooks, including reading, creating, editing, formulas and validation. Use when a task involves spreadsheet data, workbook formatting or an .xlsx file. |
| compatibility | opencode; optional host tools may include LibreOffice and a project spreadsheet library |
XLSX
Use a workbook-aware library already available in the project or host environment. Preserve formulas, styles and worksheet names unless the user asks to change them.
Workflow
- Inspect sheets, dimensions, formulas and the requested output.
- Make the smallest workbook change that satisfies the task.
- Use formulas for derived values when the workbook should remain editable.
- Recalculate with an available office tool when formula results matter.
- Reopen the workbook and validate representative cells, formulas and sheet names.
Read references/quality-checks.md for spreadsheet-specific checks.