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Skill

xlsx

Apache-2.0Updated on Nov 6, 2026192,611GitHub starsIncludes scripts

Anthropic's spreadsheet skill from the anthropics/skills repository, used for Claude's own file creation.

InstallRepository Checked on Nov 14, 2026

What the skill teaches

Anthropic's spreadsheet skill from the anthropics/skills repository, used for Claude's own file creation. It covers .xlsx, .xlsm, .xltx, CSV and TSV files: workbooks are built or edited with openpyxl, bulk data moves through pandas, and markitdown gives a quick text view of sheets. The skill insists on live formulas rather than computed values, requires a recalculation script to report zero formula errors before a file is delivered, asks for every assumption and hard-coded number to be documented in the sheet, and adds rules for financial models. It installs in Claude Code with the document-skills plugin.

Capabilities

  • Create and edit Excel workbooks with openpyxl
  • Read and write bulk tabular data with pandas
  • Recalculate formulas and check for errors
  • Convert between spreadsheet and delimited formats

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