A toolkit for creating and checking coding-agent plugins. It covers starting plugin projects, checking SKILL.md metadata, and finding hooks that fail without reporting errors.

Use it to scaffold a plugin, validate its skill files, and inspect hooks for silent failures.

It reduces setup mistakes and helps catch plugin problems that could otherwise remain hidden.

plugin-dev — Plugin for Claude Code by rube-de

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/rube-de/cc-skills

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.

README.md

[![agentmods](https://agentmods.dev/badge/plugins/rube-de/cc-skills/plugin-dev.svg)](https://agentmods.dev/plugins/rube-de/cc-skills/plugin-dev)

Your own site

<a href="https://agentmods.dev/plugins/rube-de/cc-skills/plugin-dev"><img src="https://agentmods.dev/badge/plugins/rube-de/cc-skills/plugin-dev.svg" alt="Measured on agentmods" 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 2 skills, 2 commands cost 125 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

plugin-dev 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 3d 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#plugin-dev · 17 lines

What it actually says

{
  "name": "plugin-dev",
  "description": "Plugin development tools: scaffold new plugins, validate SKILL.md frontmatter, audit hooks for silent failures",
  "version": "2.14.0",
  "source": "./plugins/plugin-dev",
  "category": "development",
  "author": {
    "name": "rube-de",
    "url": "https://github.com/rube-de"
  },
  "keywords": [
    "plugin-development",
    "scaffolding",
    "validation",
    "skill-authoring"
  ]
}

Contents

What it installs

The manifest is a name and a version. 2 skills, 2 commands travel with it, and installing the plugin installs all of them — 125 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#plugin-dev 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.

marketplace.json 6.8 KB

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.

3d ago Changed 0d94cc39d53b
3d ago First seen · 17 lines scan A 785d58546e23

Subscribe to this mod's changes

plugin-dev is a plugin published in the GitHub repository rube-de/cc-skills (10 stars, last pushed yesterday), 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 2026-09-03.

Building agents Claude Code Code review Debugging Multi-Agent agent-teams ai-council claude-code-plugin

great-cto

You already have the agent. This is everything around it. greatcto runs Claude Code as a pipeline of 70 specialist agents — an independent model checks each stage before the next builds on it, spending caps refuse rather than warn, and three decisions stay yours: what gets built, how, and whether it ships.

avelikiy/great_cto · not measured

rust-intel

Defense against LLM Rust failure modes: 59 categories of bugs that survive rustc, clippy, and cargo test — async cancellation, unsafe/FFI, concurrency, crypto, supply-chain, tests-that-pass-by-luck, semantic conformance, and systemic performance cost. Ships the rust-intel skill plus /rust-intel:audit, /rust-intel:fix.

PHPCraftdream/rust-intel · not measured

agent-harness

Multi-agent harness for Claude Code: Planner→Generator→Evaluator sprints executed as background dynamic workflows (Agent-tool fallback), fable/opus/sonnet/haiku model routing with per-role reasoning effort, harness-engineering framework for design/diagnosis, and Anthropic 2026-04-04 P-G-E pattern.

bouob/agent-harness · not measured

plugin-dev