aegis

aegis is a skill for Claude Code from myclaude-sh/myclaude-creator-engine. It costs 63 tokens per session (4,594 once invoked), scanned A, original, MIT.

A static code-security auditing skill. Static analysis checks source code without running it, while STRIDE is a method for considering common security threats.

In plain words
What is it for?
Use it for source-code security reviews, pull-request audits, threat modeling, CVE checks, compliance checks, security hardening, and guided or automatic fixes.
Why use it?
It helps find security weaknesses, exposed secrets, risky dependencies, and compliance gaps before release; it does not test a running application or a network.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter.

Good fit Use it for source-code security reviews, pull-request audits, threat modeling, CVE checks, compliance checks, security hardening, and guided or automatic fixes.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/myclaude-sh/myclaude-creator-engine/aegis
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.

Any agent
npx skills add myclaude-sh/myclaude-creator-engine --skill aegis
Clone the repo
git clone --depth 1 https://github.com/myclaude-sh/myclaude-creator-engine

Made for: Claude Code.

Its marketplace also offers this one on its own, as the plugin studio-engine-security/plugin install studio-engine-security after adding the marketplace above.

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 aegis

README.md
[![agentmods](https://agentmods.dev/badge/skills/myclaude-sh/myclaude-creator-engine/aegis/github.svg)](https://agentmods.dev/skills/myclaude-sh/myclaude-creator-engine/aegis)
Your own site
<a href="https://agentmods.dev/skills/myclaude-sh/myclaude-creator-engine/aegis"><img src="https://agentmods.dev/badge/skills/myclaude-sh/myclaude-creator-engine/aegis/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 aegis

Your own site · 80×15
<a href="https://agentmods.dev/skills/myclaude-sh/myclaude-creator-engine/aegis"><img src="https://agentmods.dev/badge/skills/myclaude-sh/myclaude-creator-engine/aegis.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 63 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 4,594 The whole file, excluding the scripts and references it only reads on demand.
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.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00063 $0.04594
Opus 5 $0.00032 $0.02297
Sonnet 5 $0.00013 $0.00919
Haiku 4.5 $0.00006 $0.00459

Measured 11d ago against content hash 82f677d3cb77, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

aegis 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 11d 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/skills/aegis/SKILL.md · 388 lines

How it starts

The opening of the file, as written. The whole thing — 388 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AEGIS — AI Code Auditor Security Skill

When to Use

  • Audit codebase security before deployment or release
  • Find vulnerabilities in code (SAST-style analysis)
  • Security review of pull requests or new features
  • Check compliance against OWASP, NIST, CIS, PCI DSS, SOC 2, ISO 27001, GDPR, HIPAA
  • Harden project security (headers, validation, hooks, CI/CD)
  • Fix security issues with auto/guided transforms
  • Threat model an application using STRIDE
  • Check for hardcoded secrets or credentials
  • Review dependencies for known CVEs
  • Generate security headers or Content Security Policy

When NOT to Use

  • Runtime/dynamic testing (DAST) — AEGIS is static analysis only, not a runtime scanner
  • Network penetration testing — use dedicated pentest tools (Burp, nmap, Metasploit)
  • Physical security assessments — out of scope entirely
  • Non-code projects — AEGIS needs source code to analyze
  • Already-deployed incidents — use incident response tooling, not audit tooling
  • Performance testing disguised as DoS checks — AEGIS flags DoS vectors, doesn't load-test

Question System

Before starting analysis, check for these inputs:

Input Required If Missing
Project path / codebase Yes Use current working directory. If empty, ask: "Which project should I audit?"
Engagement mode (RAPID/STANDARD/DEEP) No Default to STANDARD. Infer RAPID if user says "quick check" or "PR review". Infer DEEP if "pre-release" or "full audit".
Specific focus area No Audit everything. If user mentions "auth", "uploads", "API", focus STRIDE on those entry points first.
Compliance frameworks needed No Default to OWASP Top 10. Add others if user mentions "SOC 2", "PCI", "HIPAA", etc.
Fix authorization No Always ask before applying auto-fixes. Never fix without confirmation.

Boot Protocol

  1. Identify project: framework, language, stack from package.json/config files
  2. Select engagement mode based on user request:
    • RAPID (<15 min): Secrets + deps + top 25 patterns. Use for PR review, quick checks.
    • STANDARD (30-60 min): Full STRIDE + 300 patterns + compliance. Default for "audit my code."
    • DEEP (2-4 hours): Full PASTA + attack trees + supply chain + all infra. Pre-release audits.
  3. Build Security Context Object (SCO): entry points, trust boundaries, data flows
  4. Execute the three cycles: AUDIT -> FIX -> HARDEN

Read the full file on GitHub · 388 lines

Files

What ships with it

3 files beside SKILL.md 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. 11d ago First seen · 388 lines · 63 tokens per session scan A 82f677d3cb77

Subscribe to this mod's changes

aegis is a skill published in the GitHub repository myclaude-sh/myclaude-creator-engine (25 stars, last pushed 5mo ago), licensed MIT. It adds 63 tokens to every session and 4,594 once invoked, about $0.0003 per session on Opus 5. 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.

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