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system-explorer

system-explorer is a plugin for Claude Code from cyyeh/skills-playground. Its manifest loads nothing; the 4 skills it bundles cost 512 tokens per session together, scanned A, original, Apache-2.0.

A set of tools for exploring software systems and learning how they work.

In plain words
What is it for?
It is for analyzing systems, finding relevant parts, and creating learning materials about them.
Why use it?
It helps turn an unfamiliar codebase or system into information that is easier to understand.

Plugin for Claude Code

Written for Claude Code: a Claude Code plugin manifest.

not rated 2repo 7mo ago A scan tokens not measured original Apache-2.0

Good fit It is for analyzing systems, finding relevant parts, and creating learning materials about them.

Compare 6 plugins from other repositories ↓
Install in Claude Code
/plugin marketplace add cyyeh/skills-playground
/plugin install system-explorer
View source ↗ cyyeh/skills-playground cyyeh.github.io
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/cyyeh/skills-playground

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 system-explorer

README.md
[![agentmods](https://agentmods.dev/badge/plugins/cyyeh/skills-playground/system-explorer/github.svg)](https://agentmods.dev/plugins/cyyeh/skills-playground/system-explorer)
Your own site
<a href="https://agentmods.dev/plugins/cyyeh/skills-playground/system-explorer"><img src="https://agentmods.dev/badge/plugins/cyyeh/skills-playground/system-explorer/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 system-explorer

Your own site · 80×15
<a href="https://agentmods.dev/plugins/cyyeh/skills-playground/system-explorer"><img src="https://agentmods.dev/badge/plugins/cyyeh/skills-playground/system-explorer.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 4 skills cost 512 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

system-explorer 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 2mo 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.

.claude-plugin/marketplace.json#system-explorer · 13 lines

What it actually says

{
  "name": "system-explorer",
  "description": "Explore and learn about software systems",
  "version": "0.3.7",
  "source": "./skills/system-explorer/",
  "strict": false,
  "skills": [
    "./system-analyzer",
    "./system-explorer",
    "./system-finder",
    "./system-to-course"
  ]
}
Contents

What it installs

The manifest is a name and a version. 4 skills travel with it, and installing the plugin installs all of them — 512 tokens a session between them. Each is measured on its own page, and each can be installed alone.

Files

What ships with it

1 file beside marketplace.json#system-explorer in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 2mo ago First seen · 13 lines scan A d1b108d49c3e

Subscribe to this mod's changes

system-explorer is a plugin published in the GitHub repository cyyeh/skills-playground (2 stars, last pushed 7mo ago), licensed Apache-2.0. 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 2026-09-03.

Learning and teachingResearch
Related

system-explorer compared with plugins from other repositories

system-explorer next to 6 plugins from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
system-explorercyyeh/skills-playgroundPlugin27mo agoApache-2.0A—Claude Code
edulabwy51ai/edulabPlugin1.8k22d agoApache-2.0A—Claude Code
master-skillxr843/Master-skillPlugin5036d agononeA—Claude Code
explainer-videomelodic-software/claude-code-pluginsPlugin30todayMITA—Claude Code
hyphamycelium-cmbse/mycelium-hyphaPlugin12yesterdayApache-2.0A—Claude Code
understandingbengous/claude-code-pluginsPlugin6yesterdayMITA—Claude Code
unslopimisic/claude-marketplacePlugin15d agoMITA—Claude Code