Skip to content
Agentmart
Submit a tool

xlsx

Use this skill any time a spreadsheet file is the primary input or output.

Skill by anthropicsOfficial

IndexedProprietary. LICENSE.txt has complete terms★ 183,466
Write a review

Install

Works with Claude Code, Claude apps, Codex, Cursor, Gemini CLI, GitHub Copilot, VS Code, OpenCode, Goose, Windsurf. Read the repository before you give any tool access to your data.

npx agentmarket install skill/anthropics-xlsx

Asks which of your tools to add it to (Claude Code, Codex, Cursor, VS Code, Windsurf, Gemini CLI, Claude Desktop) and shows the change first. See https://agentmart.dev/cli.

Get the weekly diff

The weekly diff: one email a week with new agent tools, notable updates and grade changes, plus security alerts for tools you follow. Double opt-in, one-click unsubscribe.

We use your email only for this newsletter. Privacy

About

Use this skill any time a spreadsheet file is the primary input or output. This means any task where the user wants to: open, read, edit, or fix an existing .xlsx, .xlsm, .xltx, .csv, or .tsv file (e.g., adding columns, computing formulas, formatting, charting, cleaning messy data); create a new spreadsheet from scratch or from other data sources; or convert between tabular file formats. Trigger especially when the user references a spreadsheet file by name or path — even casually (like "the xlsx in my downloads") — and wants something done to it or produced from it. Also trigger for cleaning or restructuring messy tabular data files (malformed rows, misplaced headers, junk data) into proper spreadsheets. The deliverable must be a spreadsheet file. Do NOT trigger when the primary deliverable is a Word document, HTML report, standalone Python script, database pipeline, or Google Sheets API integration, even if tabular data is involved.

Use cases: documents, spreadsheets, frontend, backend

Reviews

Write a review

No reviews yet. Installed it? Reviews come from verified installers only. How reviews work

Permissions

What this skill can do and what it asks for, from its SKILL.md. Checked Oct 25, 2026.

Tools
No tools found
Secrets
None asked for
Install scripts
None found
Runs as
Python package

Network hosts it talks to 1

  • codeload.github.com · found in install command

Files it touches

  • ~/.claude/skills/xlsx

What's inside

Skill name
xlsx
Description
Use this skill any time a spreadsheet file is the primary input or output. This means any task where the user wants to: open, read, edit, or fix an existing .xlsx, .xlsm, .xltx, .csv, or .tsv file (e.g., adding columns, computing formulas, formatting, charting, cleaning messy data); create a new spreadsheet from scratch or from other data sources; or convert between tabular file formats. Trigger especially when the user references a spreadsheet file by name or path — even casually (like "the xlsx in my downloads") — and wants something done to it or produced from it. Also trigger for cleaning or restructuring messy tabular data files (malformed rows, misplaced headers, junk data) into proper spreadsheets. The deliverable must be a spreadsheet file. Do NOT trigger when the primary deliverable is a Word document, HTML report, standalone Python script, database pipeline, or Google Sheets API integration, even if tabular data is involved.
License
Proprietary. LICENSE.txt has complete terms
Instructions
95 lines in SKILL.md · view on GitHub

Before installing

  • Ships executable scripts

Files (53)

  • LICENSE.txt
  • SKILL.md
  • __init__.py · scripts/office/helpers/
  • pptx_chart.py · scripts/office/helpers/
  • pptx_slide.py · scripts/office/helpers/
  • pptx_theme.py · scripts/office/helpers/
  • dml-chart.xsd · scripts/office/schemas/ISO-IEC29500-4_2016/
  • dml-chartDrawing.xsd · scripts/office/schemas/ISO-IEC29500-4_2016/
  • dml-diagram.xsd · scripts/office/schemas/ISO-IEC29500-4_2016/
  • dml-lockedCanvas.xsd · scripts/office/schemas/ISO-IEC29500-4_2016/
  • dml-main.xsd · scripts/office/schemas/ISO-IEC29500-4_2016/
  • dml-picture.xsd · scripts/office/schemas/ISO-IEC29500-4_2016/
  • dml-spreadsheetDrawing.xsd · scripts/office/schemas/ISO-IEC29500-4_2016/
  • dml-wordprocessingDrawing.xsd · scripts/office/schemas/ISO-IEC29500-4_2016/
  • pml.xsd · scripts/office/schemas/ISO-IEC29500-4_2016/
  • shared-additionalCharacteristics.xsd · scripts/office/schemas/ISO-IEC29500-4_2016/
  • shared-bibliography.xsd · scripts/office/schemas/ISO-IEC29500-4_2016/
  • shared-commonSimpleTypes.xsd · scripts/office/schemas/ISO-IEC29500-4_2016/
  • shared-customXmlDataProperties.xsd · scripts/office/schemas/ISO-IEC29500-4_2016/
  • shared-customXmlSchemaProperties.xsd · scripts/office/schemas/ISO-IEC29500-4_2016/
  • shared-documentPropertiesCustom.xsd · scripts/office/schemas/ISO-IEC29500-4_2016/
  • shared-documentPropertiesExtended.xsd · scripts/office/schemas/ISO-IEC29500-4_2016/
  • shared-documentPropertiesVariantTypes.xsd · scripts/office/schemas/ISO-IEC29500-4_2016/
  • shared-math.xsd · scripts/office/schemas/ISO-IEC29500-4_2016/
  • shared-relationshipReference.xsd · scripts/office/schemas/ISO-IEC29500-4_2016/
  • sml.xsd · scripts/office/schemas/ISO-IEC29500-4_2016/
  • vml-main.xsd · scripts/office/schemas/ISO-IEC29500-4_2016/
  • vml-officeDrawing.xsd · scripts/office/schemas/ISO-IEC29500-4_2016/
  • vml-presentationDrawing.xsd · scripts/office/schemas/ISO-IEC29500-4_2016/
  • vml-spreadsheetDrawing.xsd · scripts/office/schemas/ISO-IEC29500-4_2016/
  • vml-wordprocessingDrawing.xsd · scripts/office/schemas/ISO-IEC29500-4_2016/
  • wml.xsd · scripts/office/schemas/ISO-IEC29500-4_2016/
  • xml.xsd · scripts/office/schemas/ISO-IEC29500-4_2016/
  • opc-contentTypes.xsd · scripts/office/schemas/ecma/fouth-edition/
  • opc-coreProperties.xsd · scripts/office/schemas/ecma/fouth-edition/
  • opc-digSig.xsd · scripts/office/schemas/ecma/fouth-edition/
  • opc-relationships.xsd · scripts/office/schemas/ecma/fouth-edition/
  • mc.xsd · scripts/office/schemas/mce/
  • wml-2010.xsd · scripts/office/schemas/microsoft/
  • wml-2012.xsd · scripts/office/schemas/microsoft/
  • wml-2018.xsd · scripts/office/schemas/microsoft/
  • wml-cex-2018.xsd · scripts/office/schemas/microsoft/
  • wml-cid-2016.xsd · scripts/office/schemas/microsoft/
  • wml-sdtdatahash-2020.xsd · scripts/office/schemas/microsoft/
  • wml-symex-2015.xsd · scripts/office/schemas/microsoft/
  • soffice.py · scripts/office/
  • validate.py · scripts/office/
  • __init__.py · scripts/office/validators/
  • base.py · scripts/office/validators/
  • docx.py · scripts/office/validators/
  • pptx.py · scripts/office/validators/
  • redlining.py · scripts/office/validators/
  • recalc.py · scripts/

The license isn't open source, so the instructions aren't shown here. Read SKILL.md on GitHub

More from anthropics/skills

Compare and alternatives

    Featured in

    Signals

    Stars
    183,466
    Forks
    21,724
    Open issues
    416
    Contributors
    16
    Last commit (this folder)
    Jul 17, 2026 (3 months ago)

    From GitHub (fetched Oct 24, 2026).

    Details

    License
    Proprietary. LICENSE.txt has complete terms
    Repository
    github.com/anthropics/skills
    First seen
    Oct 24, 2026
    Last checked
    Oct 24, 2026
    Source
    GitHubgithub-graphql

    Same skill elsewhere

    Copies of this SKILL.md published by others; search shows only one of them.

    More from anthropics

    Cite this page

    xlsx skill. Agent Mart. https://agentmart.dev/skills/anthropics-xlsx (last updated 2026-10-24)