A connection that directs Claude Code to hosted tools for working with spreadsheet files such as XLSX and CSV. It adds session-start guidance but does not include a spreadsheet engine.

Use it when analyzing or editing spreadsheets, including formulas, totals, errors, conversions, and workbook data.

It lets spreadsheet work use the hosted service instead of pretending the add-on contains its own workbook-processing software.

xlsx-for-ai — Plugin for Claude Code by senoff

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.

Clone the repo

git clone --depth 1 https://github.com/senoff/xlsx-for-ai

Made for: Claude Code.

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.

README.md

[![agentmods](https://agentmods.dev/badge/plugins/senoff/xlsx-for-ai/claude-code-plugin/github.svg)](https://agentmods.dev/plugins/senoff/xlsx-for-ai/claude-code-plugin)

Your own site

<a href="https://agentmods.dev/plugins/senoff/xlsx-for-ai/claude-code-plugin"><img src="https://agentmods.dev/badge/plugins/senoff/xlsx-for-ai/claude-code-plugin/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.

Your own site · 80×15

<a href="https://agentmods.dev/plugins/senoff/xlsx-for-ai/claude-code-plugin"><img src="https://agentmods.dev/badge/plugins/senoff/xlsx-for-ai/claude-code-plugin.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session not measured What this adds to a session before it is invoked.

When invoked not measured The manifest loads nothing itself; its 1 skill, 1 hook cost 99 tokens a session between them.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Security

Grade A, and why

xlsx-for-ai 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 yesterday.

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.

claude-code-plugin/.claude-plugin/plugin.json · 17 lines

What it actually says

{
  "name": "xlsx-for-ai",
  "displayName": "xlsx-for-ai",
  "version": "0.1.2",
  "description": "Recalculate spreadsheet formulas, check a sheet for errors, and write real .xlsx files from Claude. Use it when the answer depends on formula results, on whether saved values are current, or on handing back a working spreadsheet file. Your spreadsheet files are sent to the hosted xlsx-for-ai server for processing.",
  "author": { "name": "xlsx-for-ai", "url": "https://xlsx-for-ai.dev" },
  "homepage": "https://xlsx-for-ai.dev",
  "repository": "https://github.com/senoff/xlsx-for-ai",
  "license": "MIT",
  "keywords": ["spreadsheet", "xlsx", "xls", "csv", "formulas", "recalculate", "google-sheets"],
  "icon": "./icon.png",
  "documentationUrl": "https://xlsx-for-ai.dev/developers/",
  "supportUrl": "https://github.com/senoff/xlsx-for-ai/issues",
  "privacyPolicyUrl": "https://xlsx-for-ai.dev/privacy/",
  "termsOfServiceUrl": "https://xlsx-for-ai.dev/terms/"
}

Contents

What it installs

The manifest is a name and a version. 1 skill, 1 hook travel with it, and installing the plugin installs all of them — 99 tokens a session between them. Each is measured on its own page, and each can be installed alone.

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.

yesterday Changed · +5 lines 987d4c9ed5f9
7d ago First seen · 12 lines scan A a62f507e04a7

Subscribe to this mod's changes

xlsx-for-ai is a plugin published in the GitHub repository senoff/xlsx-for-ai (6 stars, last pushed yesterday), licensed MIT. Its token cost is not measured: this kind of file is read by the harness, not the model. 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 2026-10-09.

Documents Spreadsheets agent ai claude cli copilot cursor

xlsx-for-ai

Getting it into your agent

Wrote this? Show the measurements

Grade A, and why

Nothing flagged

What it actually says

What it installs

What this file has done since we first saw it

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