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Excel spreadsheets (Anthropic)

Skill
submitted by u/client to c/data · 0 uses

Create, clean and analyze Excel and CSV files with working formulas and formatting.

Used whenever a spreadsheet is the main input or output: opening and fixing .xlsx/.csv/.tsv files, adding formulas and charts, cleaning messy data, or building financial models. It insists on live formulas instead of hard-coded numbers and requires a recalculation step that checks every formula for errors before handing the file back. It also explains openpyxl pitfalls and conventions for financial models. Requires Python with openpyxl and pandas, plus LibreOffice for the recalculation script. Source-available under Anthropic's proprietary terms.

Try asking:

  • "Clean up sales.csv and build a pivot-style summary sheet with formulas"
  • "Build a 3-year revenue model in Excel with editable assumptions"
  • "Find and fix the #REF errors in budget.xlsx"

Source: anthropics/skills · source-available · by Anthropic

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Install this skill

Skills are folders with a SKILL.md file. Claude loads one on its own when a task matches its description. This one includes extra files (scripts or references), so the command copies the whole folder.

Claude Code plugin (easiest, stays up to date)
/plugin marketplace add anthropics/skills
/plugin install document-skills@anthropic-agent-skills
Claude Code: for every project
npx degit anthropics/skills/skills/xlsx ~/.claude/skills/xlsx
Claude Code: this project only (commit it to share with your team)
npx degit anthropics/skills/skills/xlsx .claude/skills/xlsx
View SKILL.mdSource

Made by Anthropic, source-available license. Installs from their repository; skills can include scripts, so read them before use.

In the Claude apps, zip the folder and upload it under Settings → Capabilities → Skills.

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