xlsx
Use this skill any time a spreadsheet file is the primary input or output.
Skill by massimorofi
Chalk Labs
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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/massimorofi-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 cases: documents, spreadsheets, frontend, backend
Reviews
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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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Signals
- Stars
- 0
- Forks
- 0
- Open issues
- 0
- Last commit (this folder)
- Oct 10, 2026 (26 days ago)
From GitHub (fetched Oct 24, 2026).
Details
- License
- Proprietary. LICENSE.txt has complete terms
- Repository
- github.com/massimorofi/strixper
- First seen
- Oct 24, 2026
- Last checked
- Oct 24, 2026
- Source
- GitHubgithub-graphql
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Done for you
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Chalk Labs scopes, builds and runs agents for your team: the task audit, the eval harness, the integrations and the weekly ops report. Fixed scope, priced before we start.
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Chalk Labs is a two-founder AI and growth studio. We build AI agents, CRMs and MVPs for Web3 and AI companies, and have shipped 50+ product and token launches.
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Rahil Jain, Co-founder, Chalk Labs. Ex-Goldman Sachs engineer. You talk to the person who builds it.
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Cite this page
xlsx skill. Agent Mart. https://agentmart.dev/skills/massimorofi-xlsx (last updated 2026-10-24)