Excel / Spreadsheets (XLSX)

# Spreadsheet Skill

Official Anthropic skill for working with spreadsheet files (.xlsx, .xlsm, .csv, .tsv).

## When It Triggers

Any task where a spreadsheet file is the primary input or output:

- Opening, reading, editing, or fixing existing spreadsheets
- Creating new spreadsheets from scratch or other data sources
- Converting between tabular formats (CSV → XLSX, etc.)
- Cleaning or restructuring messy tabular data

## Capabilities

- **Add columns and rows** with proper formulas
- **Compute formulas** — SUM, VLOOKUP, pivot-like aggregations
- **Format cells** — number formats, conditional formatting, cell colors
- **Create charts** — bar, line, pie, scatter
- **Clean messy data** — malformed rows, misplaced headers, junk data
- **Multi-sheet workbooks** with cross-sheet references

## Installation

```bash
/plugin install xlsx@anthropic-skills
```

## Example Prompts

- "Add a total column to sales.xlsx"
- "Clean up this CSV — the headers are on row 4 and there's junk above"
- "Create a pivot-style summary of orders by region"
- "Convert these tab-separated logs into a formatted workbook"

## Does Not Trigger For

- Word document deliverables (use `docx`)
- Standalone Python analysis scripts
- Database pipelines or Google Sheets API calls

## Implementation

Uses openpyxl and pandas under the hood.