Individual skill

xlsx

Create, read, edit, clean, format, chart, or convert spreadsheet files while preserving spreadsheet-native deliverables. Use when .xlsx, .xlsm, .csv, or .tsv data is the primary input or a spreadsheet is the requested output. Not for Word documents, HTML reports, standalone scripts, database pipelines, or Google Sheets API work.

skills/xlsx/SKILL.md

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# Requirements for Outputs

## All Excel files

### Professional Font
- Use a consistent, professional font (e.g., Arial, Times New Roman) for all deliverables unless otherwise instructed by the user

### Zero Formula Errors
- Every Excel model MUST be delivered with ZERO formula errors (#REF!, #DIV/0!, #VALUE!, #N/A, #NAME?)

### Preserve Existing Templates (when updating templates)
- Study and EXACTLY match existing format, style, and conventions when modifying files
- Never impose standardized formatting on files with established patterns
- Existing template conventions ALWAYS override these guidelines
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