secskills-core

secskills-core is a plugin for Claude Code from trilwu/secskills. Its manifest loads nothing; the 30 skills it bundles cost 2,881 tokens per session together, scanned A, original, MIT.

A collection of 30 security guides for reverse engineering programs and auditing code. It covers native and platform-specific binaries, web backdoors, cryptography, software supply chains, AI security, and vulnerability research.

In plain words
What is it for?
Use it when examining binaries, auditing source code, hunting webshells or backdoors, reviewing third-party agent tools or MCP servers, checking cryptography, and mapping attacker techniques.
Why use it?
It brings related investigation methods into one foundation, including guidance for identifying malicious changes, reviewing weaknesses, and reporting findings. The input does not describe a single focused workflow beyond this broad coverage.

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.

Claude Code
/plugin marketplace add trilwu/secskills
agentmods
npx agentmods add plugins/trilwu/secskills/secskills-core
Clone the repo
git clone --depth 1 https://github.com/trilwu/secskills

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 secskills-core

README.md
[![agentmods](https://agentmods.dev/badge/plugins/trilwu/secskills/secskills-core.svg)](https://agentmods.dev/plugins/trilwu/secskills/secskills-core)
Your own site
<a href="https://agentmods.dev/plugins/trilwu/secskills/secskills-core"><img src="https://agentmods.dev/badge/plugins/trilwu/secskills/secskills-core.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 30 skills cost 2,881 tokens a session between them.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Security

Grade A, and why

secskills-core 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 4d 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.

secskills-core/.claude-plugin/plugin.json · 23 lines

What it actually says

{
  "name": "secskills-core",
  "version": "4.11.0",
  "description": "The reverse-engineering and code-audit foundation both sides share. 30 dual-use security skills: native and Go/Rust/.NET/iOS/firmware reverse engineering, packers, and Flutter/React Native/Unity/Xamarin runtimes; source-code auditing with PHP-specific depth; webshell and backdoor hunting; multi-agent vulnerability-research orchestration; supply-chain, cryptography, MCP, and pull-request review; vetting third-party agent skills and MCP servers; AI/LLM security; ATT&CK technique mapping; engagement-state discipline; and findings reporting. Ships the ttp-index.json ATT&CK map. Every skill fact-checked against primary sources. Use when reversing a binary, auditing code, hunting a backdoor, running a vulnerability-discovery campaign, reviewing crypto, or mapping techniques.",
  "author": {
    "name": "trilwu",
    "url": "https://github.com/trilwu"
  },
  "homepage": "https://github.com/trilwu/secskills",
  "repository": "https://github.com/trilwu/secskills",
  "license": "MIT",
  "keywords": [
    "security",
    "reverse-engineering",
    "code-audit",
    "cryptography",
    "ai-security",
    "supply-chain",
    "attack-mapping",
    "ctf"
  ]
}
Contents

What it installs

The manifest is a name and a version. 30 skills travel with it, and installing the plugin installs all of them — 2,881 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. 4d ago First seen · 23 lines scan A d67c77301ba9

Subscribe to this mod's changes

secskills-core is a plugin published in the GitHub repository trilwu/secskills (134 stars, last pushed 3d 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.