xlsx
Create, read, edit, and fix Excel/CSV spreadsheets with formulas, charts, and financial formatting.
🛡️ AgentReady threat assessment
MAESTRO 7-layer threat model + OWASP AIVSS risk score for xlsx, derived from its capabilities.
These scores are auto-generated from public information (the agent's own listing, docs, and repository) using the canonical OWASP AIVSS formula and the MAESTRO framework — an estimate for guidance, not a penetration test, audit, or certification. See the scoring methodology — every score is re-derived by the same automated method as an agent's public evidence changes.
Overview
Anthropic's official spreadsheet skill for .xlsx/.xlsm/.csv/.tsv tasks. Enforces zero-formula-error output, industry-standard financial color coding, and number formatting, using openpyxl and bundled helpers to add columns, compute formulas, build charts, clean messy tabular data, and convert formats. Reads and writes spreadsheet files and can run recalculation tooling.
Key features and capabilities
- Formula computation with zero-error guarantee
- Financial-model color coding and number formatting
- Chart creation and messy-data cleaning
Use cases
- Build a financial model with formulas and charts
- Clean a malformed CSV into a formatted spreadsheet