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SKILL.md

xlsx

Agent skill fromfreestylefly/wesight

Comprehensive spreadsheet creation, editing, and analysis with support for formulas, formatting, data analysis, and visualization. When Claude needs to work with spreadsheets (.xlsx, .xlsm, .csv, .tsv, etc) for: (1) Creating new spreadsheets with formulas and formatting, (2) Reading or analyzing data, (3) Modify existing spreadsheets while preserving formulas, (4) Data analysis and visualization in spreadsheets, or (5) Recalculating formulas

How to install xlsx

install xlsx
# install the wesight pack with the skills CLI
npx skills add freestylefly/wesight

# or add only this skill to Claude Code: copy the folder

SKILLs/xlsx/

# into

~/.claude/skills/xlsx/ (all projects)

.claude/skills/xlsx/ (one project)

SKILLs/xlsx/SKILL.md

MITFull file
1# Requirements for Outputs
2
3## All Excel files
4
5### Zero Formula Errors
6- Every Excel model MUST be delivered with ZERO formula errors (#REF!, #DIV/0!, #VALUE!, #N/A, #NAME?)
7
8### Preserve Existing Templates (when updating templates)
9- Study and EXACTLY match existing format, style, and conventions when modifying files
10- Never impose standardized formatting on files with established patterns
11- Existing template conventions ALWAYS override these guidelines
12
13## Financial models
14
15### Color Coding Standards
16Unless otherwise stated by the user or existing template
17
18#### Industry-Standard Color Conventions
19- **Blue text (RGB: 0,0,255)**: Hardcoded inputs, and numbers users will change for scenarios
20- **Black text (RGB: 0,0,0)**: ALL formulas and calculations
21- **Green text (RGB: 0,128,0)**: Links pulling from other worksheets within same workbook
22- **Red text (RGB: 255,0,0)**: External links to other files
23- **Yellow background (RGB: 255,255,0)**: Key assumptions needing attention or cells that need to be updated
24
25### Number Formatting Standards
26
27#### Required Format Rules
28- **Years**: Format as text strings (e.g., "2024" not "2,024")
29- **Currency**: Use $#,##0 format; ALWAYS specify units in headers ("Revenue ($mm)")
30- **Zeros**: Use number formatting to make all zeros "-", including percentages (e.g., "$#,##0;($#,##0);-")
31- **Percentages**: Default to 0.0% format (one decimal)
32- **Multiples**: Format as 0.0x for valuation multiples (EV/EBITDA, P/E)
33…

Excerpt shown under the repository's MIT license.

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