Spreadsheets
DocumentsspreadsheetsSpreadsheets is an Agent Skill for documents published in the Hmbown/CodeWhale repository on GitHub: a SKILL.md instruction file an AI agent can load to do this task.
Create, edit, analyze, clean, or convert spreadsheets including XLSX, CSV, TSV, formulas, charts, and tabular reports.
How to use this skill
Bring this guide into your coding agent with a prompt tailored to the tool you use.
- Open your project in Codex.
- Copy and paste the prompt below.
- Review files and risks before approving any action.
Inspect the Agent Skill at https://github.com/Hmbown/CodeWhale/blob/HEAD/crates/tui/assets/skills/spreadsheets/SKILL.md and all supporting files. Report provenance, permissions, scripts, dependencies, and security risks. Propose an exact installation into .agents/skills/spreadsheets, but wait for my approval before writing files or running scripts.
Copying this prompt does not install or run the skill. Review third-party files before use.
Spreadsheets
Use this skill when the input or deliverable is a spreadsheet: .xlsx, .xlsm,
.csv, .tsv, or a table that should become one of those formats.
Workflow
- Identify whether the task is cleaning, analysis, formatting, charting, or workbook generation.
- Preserve source files. Write a new output workbook unless the user asked for an in-place edit.
- Use appropriate tools:
- Python
csvorpandasfor data cleaning and analysis openpyxlfor XLSX formulas, styles, tables, filters, freeze panes, and charts- LibreOffice only when conversion or recalculation is needed and available
- Python
- Keep raw data separate from summary sheets when that helps auditability.
- Use formulas when the workbook should remain interactive; use fixed values when the result must be stable and reproducible.
- Verify by loading the workbook, checking sheet names, row/column counts, formulas, and representative cell values. For CSV/TSV, check delimiters, quoting, headers, and row widths.
If dependencies are missing, ask before installing packages. Never silently drop rows, change date/time semantics, or coerce IDs with leading zeroes into numbers.