What is secskills-core?

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.

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.

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.

secskills-core — Plugin for Claude Code by trilwu/secskills

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/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.

README.md

[![agentmods](https://agentmods.dev/badge/plugins/trilwu/secskills/secskills-core/github.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/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.

Your own site · 80×15

<a href="https://agentmods.dev/plugins/trilwu/secskills/secskills-core"><img src="https://agentmods.dev/badge/plugins/trilwu/secskills/secskills-core.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 30 skills cost 2,881 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

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 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.

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.

1mo 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 (164 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.

Debugging Security skills

secskills-core

Getting it into your agent

Wrote this? Show the measurements

Grade A, and why

Nothing flagged

What it actually says

What it installs

What this file has done since we first saw it

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devflow

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