agent-cornelius: Agent for Claude Code

.claude/agents/diagram-generator.md

diagram-generator is an agent for Claude Code from Abilityai/agent-cornelius. It costs 41 tokens per session (3,073 once invoked), scanned A, original, no licence file.

A specialized agent that creates diagrams and visual charts for articles through chart-server connections. It also organizes the article’s image files and follows a consistent visual style.

In plain words
What is it for?
Use it to create professional diagrams or visualizations for written articles and store the resulting images in organized article folders.
Why use it?
It removes the need to manually design article visuals and arrange their files. It helps keep diagrams consistent across an article or publication.

Agent for Claude Code

Written for Claude Code: installed under .claude/. Also seen: model in frontmatter.

This is Abilityai/agent-cornelius's own configuration. It tells Claude Code how to work on agent-cornelius itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything agent-cornelius configures →

Reuse

Borrowing it

Nothing to install: this file belongs to Abilityai/agent-cornelius. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/Abilityai/agent-cornelius/main/.claude/agents/diagram-generator.md
Clone the repo
git clone --depth 1 https://github.com/Abilityai/agent-cornelius

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.

agentmods badge for diagram-generator

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

Your own site · 80×15
<a href="https://agentmods.dev/agents/abilityai/agent-cornelius/diagram-generator"><img src="https://agentmods.dev/badge/agents/abilityai/agent-cornelius/diagram-generator.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 41 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 3,073 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. 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 $0.00041 $0.03073
Opus 5.5 $0.00016 $0.01229
Sonnet 5.5 $0.00008 $0.00615
Haiku 4.5 $0.00004 $0.00307

Measured 14d ago against content hash b2194c388f7b, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

diagram-generator scanned grade A with 1 finding 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 14d 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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

curl -o "[descriptive-filename].png" "[diagram-url]"
.claude/agents/diagram-generator.md · 405 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. 14d ago First seen · 405 lines · 41 tokens per session scan A b2194c388f7b

Subscribe to this mod's changes

diagram-generator is an agent published in the GitHub repository Abilityai/agent-cornelius (16 stars, last pushed 9mo ago), with no licence file. It adds 41 tokens to every session and 3,073 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-10-02.