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This entry duplicates xlsx, which is the one we list in search.

xlsx

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

Skill by gupta-builds

IndexedProprietary. LICENSE.txt has complete terms
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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/gupta-builds-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.

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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

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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

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Last commit (this folder)
Sep 21, 2026 (1 month ago)

From GitHub (fetched Oct 24, 2026).

Details

License
Proprietary. LICENSE.txt has complete terms
Repository
github.com/gupta-builds/second-brain-claudekit
First seen
Oct 24, 2026
Last checked
Oct 24, 2026
Source
GitHubgithub-graphql

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Cite this page

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