sheet-agent

sheet-agent is an agent for Claude Code, OpenCode from benbrastmckie/nvim. It costs 18 tokens per session (4,255 once invoked), scanned A, original, no licence file.

An agent for creating, editing, and analysing XLSX spreadsheets using openpyxl and pandas. XLSX is the file format commonly used by Microsoft Excel; openpyxl and pandas are Python tools for working with spreadsheet data.

In plain words
What is it for?
Use it to create, change, or analyse XLSX files with Python.
Why use it?
It supports spreadsheet work through code instead of manual editing in a spreadsheet application.

Agent for Claude CodeOpenCode

Written for OpenCode and Claude Code: installed under .opencode/, but also a Claude Code subagent (agents/*.md).

Good fit Use it to create, change, or analyse XLSX files with Python.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/benbrastmckie/nvim/sheet-agent
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/benbrastmckie/nvim

Made for: Claude Code, OpenCode.

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 sheet-agent

README.md
[![agentmods](https://agentmods.dev/badge/agents/benbrastmckie/nvim/sheet-agent/github.svg)](https://agentmods.dev/agents/benbrastmckie/nvim/sheet-agent)
Your own site
<a href="https://agentmods.dev/agents/benbrastmckie/nvim/sheet-agent"><img src="https://agentmods.dev/badge/agents/benbrastmckie/nvim/sheet-agent/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 sheet-agent

Your own site · 80×15
<a href="https://agentmods.dev/agents/benbrastmckie/nvim/sheet-agent"><img src="https://agentmods.dev/badge/agents/benbrastmckie/nvim/sheet-agent.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 18 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 4,255 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 $0.00018 $0.04255
Opus 5.5 $0.00007 $0.01702
Sonnet 5.5 $0.00004 $0.00851
Haiku 4.5 $0.00002 $0.00426

Measured 1mo ago against content hash 1f4a3ee252d1, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

sheet-agent 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 1mo 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.

.opencode/extensions/filetypes/agents/sheet-agent.md · 552 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

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. 1mo ago First seen · 552 lines · 18 tokens per session scan A 1f4a3ee252d1

Subscribe to this mod's changes

sheet-agent is an agent published in the GitHub repository benbrastmckie/nvim (443 stars, last pushed 2d ago), with no licence file. It adds 18 tokens to every session and 4,255 once invoked, about $0.0001 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 2026-08-30.

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