agentmods.dev

xlsx

xlsx is a skill for Claude Code, Codex from chancegraff/rules-for-claude. It costs 206 tokens per session (2,137 once invoked), scanned A, original, no licence file.

A tool for working with spreadsheet files such as .xlsx, .xlsm, .xltx, .csv, and .tsv.

In plain words
What is it for?
It helps open, read, edit, and fix spreadsheets; add columns; calculate formulas; format data; create charts; and clean messy files.
Why use it?
It removes the need to perform spreadsheet cleanup, calculations, formatting, and charting manually.

Skill for Claude CodeCodex

Which agent this was written for is unclear — body not stored (licence); the path alone says nothing.

not rated 4repo 2d ago A scan 206 tokens no licence

Good fit It helps open, read, edit, and fix spreadsheets; add columns; calculate formulas; format data; create charts; and clean messy files.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/chancegraff/rules-for-claude/xlsx
View source ↗ chancegraff/rules-for-claude
Install

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.

Any agent
npx skills add chancegraff/rules-for-claude --skill xlsx
Clone the repo
git clone --depth 1 https://github.com/chancegraff/rules-for-claude

Made for: Claude Code, Codex.

Wrote 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.

agentmods badge for xlsx

README.md
[![agentmods](https://agentmods.dev/badge/skills/chancegraff/rules-for-claude/xlsx/github.svg)](https://agentmods.dev/skills/chancegraff/rules-for-claude/xlsx)
Your own site
<a href="https://agentmods.dev/skills/chancegraff/rules-for-claude/xlsx"><img src="https://agentmods.dev/badge/skills/chancegraff/rules-for-claude/xlsx/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for xlsx

Your own site · 80×15
<a href="https://agentmods.dev/skills/chancegraff/rules-for-claude/xlsx"><img src="https://agentmods.dev/badge/skills/chancegraff/rules-for-claude/xlsx.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 206 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,137 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin unknown No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00206 $0.02137
Opus 5.5 $0.00082 $0.00855
Sonnet 5.5 $0.00041 $0.00427
Haiku 4.5 $0.00021 $0.00214

Measured 25d ago against content hash 6712b39718fe, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

xlsx 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 25d ago.

The scan reads SKILL.md. This mod also ships 12 executable files (scripts/office/helpers/__init__.py, scripts/office/helpers/pptx_chart.py, scripts/office/helpers/pptx_slide.py, …), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

skills/synced/b274f0e7-ba7f-4b80-9128-3c20a62a5a94_fb1313aa-c023-436b-bd7f-af7178660a2a/xlsx/SKILL.md · 100 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

Files

What ships with it

52 files 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.

Changes

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.

  1. 25d ago First seen · 100 lines · 206 tokens per session scan A 6712b39718fe

Subscribe to this mod's changes

xlsx is a skill published in the GitHub repository chancegraff/rules-for-claude (4 stars, last pushed 2d ago), with no licence file. It adds 206 tokens to every session and 2,137 once invoked, about $0.0008 per session on Opus 5.5. 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 2026-09-22.

Claude CodeDocumentsSpreadsheetsclaudeclaude-aiclaude-hooksclaude-rules
Related

Other skills, from other repositories

excel-cli

Discover and launch the Excel CLI for ordinary Excel workbook requests on Windows, including reads, writes, formulas, data refreshes, and workbook automation. Use the installed excel-cli plugin's npx launcher and native help to find commands; report presentation conventions are a separate optional skill.

sbroenne/mcp-server-excel · 58 tokens

excel-mcp-report-formatting

Apply optional presentation conventions when the user requests Excel report formatting or a new reader-facing report through Excel MCP tools. Use for readable headers, meaningful number formats, financial-model colours, and report layout. Do not load for ordinary reads, raw exports, targeted data updates, Power Query…

sbroenne/mcp-server-excel · 77 tokens

excel-cli-report-formatting

Apply optional presentation conventions when the user requests Excel report formatting or a new reader-facing report through excelcli. Use for readable headers, meaningful number formats, financial-model colours, and report layout. Do not load for ordinary reads, raw exports, targeted data updates, Power Query or Data…

sbroenne/mcp-server-excel · 75 tokens

document-skills

Professional document creation, editing, and analysis for Office formats (docx, pdf, pptx, xlsx). Use when working with Word documents, PDFs, PowerPoint presentations, or Excel spreadsheets.

travisjneuman/.claude · 44 tokens

analyze

Analyze a large file (CSV, Excel, PDF, JSON, code) and return a token-efficient summary. Instead of reading thousands of rows or pages, get schema + statistics + sample in under 500 tokens. Use when user mentions a file path, asks to analyze data, pastes many rows, or references a CSV/Excel/PDF/JSON file.

Shweta-Mishra-ai/tokenmizer · 76 tokens

topical-authority-map

Builds a 4-cluster Topical Authority Map from a seed keyword. Outputs an .xlsx spreadsheet with five tabs (Core Pages, AOR Pages, Linking Map, Buyer Journey, Publishing Order) plus a markdown strategy document. Interactive, asks the user to confirm central entity, source context, persona, classification, and gaps at…

lhitches/claude-seo-skills · 110 tokens