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arn-spark

arn-spark is a plugin for Claude Code from AppsVortex/arness. Its manifest loads nothing; the 28 skills, 20 agents it bundles cost 10,631 tokens per session together, scanned A, original, MIT.

A collection of workflows for exploring a new product idea from discovery through early validation. It includes work on users, use cases, architecture, naming, project scaffolding, visual sketches, and prototypes.

In plain words
What is it for?
Use it to investigate a greenfield idea, describe its users and architecture, create an initial project structure, and validate concepts with prototypes.
Why use it?
It organises the early stages of building a product before the full implementation is defined.

Plugin for Claude Code

Written for Claude Code: a Claude Code plugin manifest. Also seen: mentions Claude Code.

not rated 33repo today A scan tokens not measured original MIT

Good fit Use it to investigate a greenfield idea, describe its users and architecture, create an initial project structure, and validate concepts with prototypes.

Compare 6 plugins from other repositories ↓
Install in Claude Code
/plugin marketplace add AppsVortex/arness
/plugin install arn-spark
View source ↗ AppsVortex/arness arness.appsvortex.com
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/AppsVortex/arness

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 arn-spark

README.md
[![agentmods](https://agentmods.dev/badge/plugins/appsvortex/arness/arn-spark/github.svg)](https://agentmods.dev/plugins/appsvortex/arness/arn-spark)
Your own site
<a href="https://agentmods.dev/plugins/appsvortex/arness/arn-spark"><img src="https://agentmods.dev/badge/plugins/appsvortex/arness/arn-spark/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 arn-spark

Your own site · 80×15
<a href="https://agentmods.dev/plugins/appsvortex/arness/arn-spark"><img src="https://agentmods.dev/badge/plugins/appsvortex/arness/arn-spark.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 28 skills, 20 agents cost 10,631 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

arn-spark 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 today.

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.

plugins/arn-spark/.claude-plugin/plugin.json · 10 lines

What it actually says

{
  "name": "arn-spark",
  "repository": "https://github.com/AppsVortex/arness",
  "author": {
    "name": "Fryderyk Benigni",
    "url": "https://github.com/fredcallagan"
  },
  "description": "Greenfield exploration for Claude Code — discovery, personas, use cases, architecture vision, naming, scaffolding, visual sketches, prototype validation. 19 skills, 13 agents."
}
Contents

What it installs

The manifest is a name and a version. 28 skills, 20 agents travel with it, and installing the plugin installs all of them — 10,631 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.

  1. today First seen · 10 lines scan A ab7069a0728f

Subscribe to this mod's changes

arn-spark is a plugin published in the GitHub repository AppsVortex/arness (33 stars, last pushed today), 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 2026-10-25.

Design and UXPlanningai-workflowsclaude-code-plugindeveloper-toolsinfrastructure-as-codemcp
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