Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add skills/matingai/crab/xlsx-editnpx skills add matingai/crab --skill xlsx-editgit clone --depth 1 https://github.com/matingai/crabWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/matingai/crab/xlsx-edit)<a href="https://agentmods.dev/skills/matingai/crab/xlsx-edit"><img src="https://agentmods.dev/badge/skills/matingai/crab/xlsx-edit.svg" alt="Measured on agentmods" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.00028 | $0.00446 |
| Opus 5 | $0.00014 | $0.00223 |
| Sonnet 5 | $0.00006 | $0.00089 |
| Haiku 4.5 | $0.00003 | $0.00045 |
Grade A, and why
xlsx-edit scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 4d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
What it actually says
XLSX Edit
Use this skill when the user wants to inspect, create, clean, or modify spreadsheet-style data in .xlsx files.
Default Workflow
- Call
office_inspectto confirm the file is.xlsx. - Call
office_previewfor a compact grid snapshot. - Call
office_extract_irif you need explicit sheet names, dimensions, and cell values. - Prefer
office_apply_opsfor deterministic data edits:add_sheet,remove_sheet,rename_sheet,set_cell,clear_cell,set_range,append_rows,clear_range. - Use
office_createfor simple new workbooks. - Save to a new output path unless overwrite is explicitly intended.
Escalate To A Python Script
Prefer write_file + execute_code with openpyxl when the task depends on workbook fidelity rather than plain data:
- preserving an existing template
- styles, fonts, fills, borders, widths, freezes, merges
- formulas, references, and multi-sheet models
- CSV or TSV ingestion before export
- repeated transformations across many sheets or files
When using a script:
- work on a copy of the workbook, not the only original
- use Excel formulas instead of hardcoding computed values
- preserve sheet names and structure unless the user asked to change them
- print a concise summary of created files, changed sheets, and key ranges
See XLSX.md for a script pattern.
What ships with it
1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 4d ago First seen · 58 lines · 28 tokens per session scan A c9db87d9dabc
xlsx-edit is a skill published in the GitHub repository matingai/crab (4 stars, last pushed 2mo ago), licensed MIT. It adds 28 tokens to every session and 446 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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processing-excel-files
Edit and create Excel (.xlsx) files while preserving original formatting, merged cells, and styles. Use when working with Excel files, spreadsheets, .xlsx files, or when the user mentions editing Excel without destroying formatting.