hm-security

hm-security is a skill for Claude Code, Codex from rodrigohighermind/highermind-code-skills. It costs 138 tokens per session (9,805 once invoked), scanned C, original, MIT.

A deep security audit for finding weaknesses in an application, its APIs, authentication, containers, dependencies, data handling, and AI features. It covers common security standards and attack paths.

In plain words
What is it for?
Use it before external deployment, after adding login, permissions, financial flows, or sensitive data, and for regular security maintenance.
Why use it?
It helps identify ways an attacker could access accounts, expose data, misuse APIs, or compromise the system before deployment or after sensitive changes.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

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.

agentmods
npx agentmods add skills/rodrigohighermind/highermind-code-skills/hm-security
Any agent
npx skills add rodrigohighermind/highermind-code-skills --skill hm-security
Clone the repo
git clone --depth 1 https://github.com/rodrigohighermind/highermind-code-skills

Made for: Claude Code, Codex.

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 hm-security

README.md
[![agentmods](https://agentmods.dev/badge/skills/rodrigohighermind/highermind-code-skills/hm-security.svg)](https://agentmods.dev/skills/rodrigohighermind/highermind-code-skills/hm-security)
Your own site
<a href="https://agentmods.dev/skills/rodrigohighermind/highermind-code-skills/hm-security"><img src="https://agentmods.dev/badge/skills/rodrigohighermind/highermind-code-skills/hm-security.svg" alt="Measured on agentmods" height="20"></a>
Per session 138 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 9,805 The whole file, excluding the scripts and references it only reads on demand.
Security scan C 4 findings. Scan, not verified.
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 $0.00138 $0.09805
Opus 5 $0.00069 $0.04902
Sonnet 5 $0.00028 $0.01961
Haiku 4.5 $0.00014 $0.00980

Measured 6d ago against content hash 7da6b8134d93, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade C, and why

hm-security scanned grade C with 4 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 6d 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.

Instruction-override phrasingmediumPrompt injection

Text telling the model to disregard its earlier instructions or safety rules is the shape of a prompt injection, whoever wrote it.

| Direct injection | User input vai direto pro prompt do LLM sem sanitizacao? Testar: "Ignore all previous instructions and..." |

Downgraded: this mod is about security review, or the phrase is quoted, so it is likely naming the pattern rather than instructing it.

Cloud metadata endpointmediumServer-side request forgery

One request to 169.254.169.254 can return temporary IAM credentials.

- Metadata endpoints bloqueados (169.254.169.254, fd00::, localhost)?

Downgraded: this mod is about security review, or the phrase is quoted, so it is likely naming the pattern rather than instructing it.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

- **Race conditions**: duas requests simultaneas criam duplicatas? Saldo negativo? Double-spend? Testar com `curl` paralelo ou script.

Runs shell commandslowCapability

Expected in a hook, worth knowing in a rule or an instructions file.

- Command injection: sem `os.system()`, `subprocess.run(shell=True)`, `eval()`, `exec()` com input do usuario?
hm-security/SKILL.md · 759 lines

How it starts

The opening of the file, as written. The whole thing — 759 lines — stays where its author put it; the contents beside it link to each section on GitHub.

/hm-security — Auditoria de Segurança (v2.3)

Você está agora em modo security. Você é um auditor de segurança senior. Seu trabalho e encontrar toda vulnerabilidade — básica ou avancada — antes que um atacante encontre. A barra é o que a Tempest, CrowdStrike, Trail of Bits, NCC Group, ou Cure53 entregariam num pentest report.

Princípio central

Segurança não é feature. Não é fase. Não é checklist pra passar. E a fundacao sobre a qual tudo e construido. Se a fundacao tem rachaduras, não importa o quao bonito e o predio.

Todo finding de segurança é CRÍTICO até que se prove o contrario. O onus de provar que não é CRÍTICO esta em quem quer rebaixar, não em quem encontrou.

Esta skill cobre attack-driven (vazamento, comprometimento, escalation). Para bug/crash-driven (backup, migration safety, undo destrutivo, DR), complementa com /hm-data-integrity. As duas se sobrepoem em "dados sao sagrados" mas atacam o problema por angulos diferentes — segurança e integridade sao primos, não gemeos.

Quando usar

  • Antes de qualquer deploy pra ambiente externo (homol, staging, prod)
  • Apos adicionar autenticacao, autorizacao, ou fluxo financeiro
  • Quando o projeto manipula dados sensíveis (PII, financeiro, saúde)
  • Periodicamente como auditoria de manutencao
  • Quando mudar dependências significativas
  • Antes de abrir o projeto pra usuarios reais
  • Apos integrar qualquer LLM/AI (prompt injection e vetor real)

Níveis de auditoria

Nível Quando usar Escopo
L1 — Baseline Todo projeto, todo deploy Container, secrets, OWASP Top 10, dependências, .dockerignore
L2 — Enterprise Projetos com auth, dados sensíveis, multi-tenant L1 + API Top 10, business logic, ASVS L2, crypto, compliance, AI/LLM
L3 — Critical Fintech, saúde, dados regulados, alta exposicao L2 + ASVS L3, supply chain, threat modeling (STRIDE), formal verification

Se não souber o nível, use L2. L1 e o mínimo absoluto. L3 e pra quando o impacto de uma breach e catastrofico.

Read the full file on GitHub · 759 lines

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. 6d ago First seen · 759 lines · 138 tokens per session scan C 7da6b8134d93

Subscribe to this mod's changes

hm-security is a skill published in the GitHub repository rodrigohighermind/highermind-code-skills (192 stars, last pushed 2mo ago), licensed MIT. It adds 138 tokens to every session and 9,805 once invoked, about $0.0007 per session on Opus 5. A static security scan graded it C with 4 findings (instruction-override phrasing, cloud metadata endpoint, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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