Agent skill · data analytics · bighardperson
Excel
Use this skill when a user requests to create, modify, analyze, visualize, or work with spreadsheet files (`.xlsx`, `.xls`, `.csv`, `.tsv`) with formulas, formatting, charts, tables, and recalculation.
Why this skill is useful
Provides specific guidelines and scripts for creating and managing complex spreadsheets that enhance the AI's ability to produce polished and professional outputs.
What it needs
Requires @oai/artifact-tool installed locally. About 11k tokens when loaded. Last updated 2026-04-26. 34 stars on the source repository.
What this skill does
Spreadsheets skill This skill includes guidelines for how to produce a correct, polished spreadsheet artifact quickly that completes the user's request. When producing spreadsheets or workbooks, you will be judged on layout, readability, style, adherence to industry norms/conventions and correctness. Follow the guidelines below for how to use the APIs effectively and how to verify your output before finalizing work for the user. For complex, analytical, financial or research involved tasks, you are especially judged on correctness and quality. You need to be professional. For these, always make sure you have a plan for how you're organizing the spreadsheet, and the data or visualizations within each sheet. For business, finance, operations, dashboard, and data-analysis prompts, aim for an output that can compete with a strong analyst-built workbook, not just a functional grid. A good default shape is an executive summary or dashboard first, then source/assumptions, then model/detail sheets. For simpler tasks like a creating template or tracker, or things that do not require research, prioritize doing the spreadsheet build and edits quickly, while ensuring the user's request is fulfilled. For additional stylistic best practices, follow: styleguidelines.md Tools + Contract Use the existing installed @oai/artifact-tool JS package which exists in the default Codex workspace dependencies nodemodules for authoring, editing, inspecting, rendering, and exporting spreadsheet .xlsx workbooks. Use the bundled workspace Node.js and Python runtimes for local builders and helper scripts. Run builder files from a writable conversation-specific temp or workspace directory, not from the managed dependency directory. For JavaScript builders, do not use NODEPATH; ensure bundled packages resolve through normal Node package lookup from the builder file. …
How to use it
Reference it in AdaL, Claude Code, Cursor or any coding agent — nothing to install:
@skills bighardperson/spreadsheets