plugin-dev

plugin-dev is a plugin for Claude Code from SummerSec/SumSec-Skills. Its manifest loads nothing; the 7 skills, 1 command, 3 agents it bundles cost 1,391 tokens per session together, scanned A, original, Apache-2.0.

A toolkit for building Claude Code plugins, with reusable instructions, agents, and a guided plugin-creation command.

In plain words
What is it for?
It helps create plugin structures, agents, commands, hooks, skills, and MCP integrations, and review or validate them.
Why use it?
It brings common plugin-building tasks and checks into one collection, so you do not have to design each part from scratch.

Plugin for Claude Code

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

Good fit It helps create plugin structures, agents, commands, hooks, skills, and MCP integrations, and review or validate them.

Compare 6 plugins from other repositories ↓
Install in Claude Code
/plugin marketplace add SummerSec/SumSec-Skills
/plugin install plugin-dev
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/SummerSec/SumSec-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.

agentmods badge for plugin-dev

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

Your own site · 80×15
<a href="https://agentmods.dev/plugins/summersec/sumsec-skills/plugin-dev"><img src="https://agentmods.dev/badge/plugins/summersec/sumsec-skills/plugin-dev.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 7 skills, 1 command, 3 agents cost 1,391 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 1mo 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.

plugin-dev/.claude-plugin/plugin.json · 10 lines

What it actually says

{
  "name": "plugin-dev",
  "version": "1.0.47",
  "description": "Claude Code 插件开发工具箱:7 个核心 skill(agent/command/hook/skill/MCP/插件结构与设置)+ 3 个 agent(agent-creator、plugin-validator、skill-reviewer)+ /plugin-dev:create-plugin 引导式工作流。",
  "author": {
    "name": "Anthropic",
    "email": "[email protected]"
  }
}
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. 1mo ago Changed fd1560f8c97b
  2. 1mo ago Changed f739ea5c60f6
  3. 1mo ago First seen · 10 lines scan A 5e6162d2f496

Subscribe to this mod's changes

plugin-dev is a plugin published in the GitHub repository SummerSec/SumSec-Skills (8 stars, last pushed 1mo 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 2026-08-31.