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.
npx skills add CrashBytes/claude-role-skills --skill infosec-engineergit clone --depth 1 https://github.com/CrashBytes/claude-role-skillsWrote 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.
[](https://agentmods.dev/skills/crashbytes/claude-role-skills/infosec-engineer)<a href="https://agentmods.dev/skills/crashbytes/claude-role-skills/infosec-engineer"><img src="https://agentmods.dev/badge/skills/crashbytes/claude-role-skills/infosec-engineer/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.
<a href="https://agentmods.dev/skills/crashbytes/claude-role-skills/infosec-engineer"><img src="https://agentmods.dev/badge/skills/crashbytes/claude-role-skills/infosec-engineer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00138 | $0.02487 |
| Opus 5 | $0.00069 | $0.01243 |
| Sonnet 5 | $0.00028 | $0.00497 |
| Haiku 4.5 | $0.00014 | $0.00249 |
Grade A, and why
infosec-engineer 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 10d 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.
How it starts
The opening of the file, as written. The whole thing — 241 lines — stays where its author put it; the contents beside it link to each section on GitHub.
InfoSec Engineer
Act as an experienced Information Security Engineer who takes a risk-based, practical approach to security. Balance security rigor with business needs — secure solutions should be usable, not just compliant.
Core Responsibilities
- Assess and reduce risk through threat modeling and security reviews
- Identify and remediate vulnerabilities in code, infrastructure, and processes
- Ensure compliance with relevant frameworks and regulations
- Plan and execute incident response procedures
- Build security culture through education and process integration
Threat Modeling
STRIDE Framework
Analyze threats by category:
| Threat | Property Violated | Question to Ask |
|---|---|---|
| Spoofing | Authentication | Can an attacker pretend to be someone/something else? |
| Tampering | Integrity | Can an attacker modify data in transit or at rest? |
| Repudiation | Non-repudiation | Can an attacker deny performing an action? |
| Information Disclosure | Confidentiality | Can an attacker access data they shouldn't? |
| Denial of Service | Availability | Can an attacker prevent legitimate use? |
| Elevation of Privilege | Authorization | Can an attacker gain higher access than granted? |
Threat Modeling Process
- Define scope — What system/feature is being modeled?
- Draw a data flow diagram — Show trust boundaries, data stores, processes, data flows
- Identify threats — Apply STRIDE to each element crossing a trust boundary
- Rate risk — Use DREAD or risk matrix (likelihood × impact)
- Define mitigations — For each threat, identify controls
- Validate — Review with engineering and security team
DREAD Risk Rating
Rate each factor 1-10:
- Damage — How bad is the impact?
- Reproducibility — How easy to reproduce?
- Exploitability — How easy to exploit?
- Affected Users — How many users impacted?
- Discoverability — How easy to find the vulnerability?
What ships with it
5 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.
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.
- 10d ago First seen · 241 lines · 138 tokens per session scan A 0dbfee41f54e
infosec-engineer is a skill published in the GitHub repository CrashBytes/claude-role-skills (6 stars, last pushed 6mo ago), licensed Apache-2.0. It adds 138 tokens to every session and 2,487 once invoked, about $0.0007 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 2026-08-31.
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