xlsx
Installation
SKILL.md
xlsx
Work with .xlsx workbooks. The format is OOXML SpreadsheetML — a zip
container of XML parts. Treat each cell as a typed value: a number, a string,
a datetime, or a formula. Mixing the four causes Excel to flag the workbook
or compute incorrect totals.
Decide the path first
| You have | Goal | Path |
|---|---|---|
Existing .xlsx |
Read sheets and cells | A. Inspect |
Existing .xlsx |
Modify specific cells | B. Edit-in-place |
| Nothing or a brief | Build a new workbook | C. Create from scratch |
If the user provides a workbook to update, default to path B and treat the input as the formatting baseline. Choose path C only when the user says "start fresh".