system

A set of tools for checking project setup, maintaining project files, and preparing a Claude Code project. It includes commands, helper agents, and a project-setup skill.

In plain words
What is it for?
Use it to audit project infrastructure, clean up generated files and reports, configure a project, and get structured help with difficult reasoning tasks.
Why use it?
It brings related health checks, cleanup tasks, and setup guidance into one add-on instead of handling each task separately.

Plugin for Claude Code

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.

agentmods
npx agentmods add plugins/stefan-jansen/claude-code-toolkit/system
Claude Code
/plugin marketplace add stefan-jansen/claude-code-toolkit
Clone the repo
git clone --depth 1 https://github.com/stefan-jansen/claude-code-toolkit

Made for: Claude Code.

Per session not measured What this adds to a session before it is invoked.
When invoked not measured Not applicable: nothing here is loaded into a session.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Security

Grade A, and why

system 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.

plugins/system/.claude-plugin/plugin.json · 23 lines

What it actually says

{
  "name": "system",
  "version": "1.2.0",
  "description": "System health, maintenance, and project setup",
  "author": {
    "name": "Claude Code Framework"
  },
  "keywords": ["system", "health", "audit", "maintenance", "setup"],
  "commands": [
    "./commands/audit.md",
    "./commands/cleanup.md",
    "./commands/system:status.md"
  ],
  "agents": [
    "./agents/auditor.md",
    "./agents/reasoning-specialist.md"
  ],
  "skills": [
    "./skills/project-setup"
  ],
  "license": "MIT"
}
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. yesterday First seen · 23 lines scan A a35be88e2977

Subscribe to this mod's changes

system is a plugin published in the GitHub repository stefan-jansen/claude-code-toolkit (85 stars, last pushed 1mo ago), 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 2026-08-30.