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 matteocervelli/llms --skill security-assessorgit clone --depth 1 https://github.com/matteocervelli/llmsWrote 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/matteocervelli/llms/security-assessor)<a href="https://agentmods.dev/skills/matteocervelli/llms/security-assessor"><img src="https://agentmods.dev/badge/skills/matteocervelli/llms/security-assessor/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/matteocervelli/llms/security-assessor"><img src="https://agentmods.dev/badge/skills/matteocervelli/llms/security-assessor.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 | $0.00032 | $0.03668 |
| Opus 5 | $0.00016 | $0.01834 |
| Sonnet 5 | $0.00006 | $0.00734 |
| Haiku 4.5 | $0.00003 | $0.00367 |
Grade A, and why
security-assessor 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 5d 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 — 551 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Purpose
The security-assessor skill provides comprehensive security risk assessment capabilities for feature implementations. It evaluates potential security vulnerabilities using the OWASP Top 10 framework, identifies security requirements, and recommends appropriate mitigation strategies to ensure secure-by-design implementations.
When to Use
This skill auto-activates when you:
- Assess security risks for new features
- Evaluate OWASP Top 10 compliance
- Identify security requirements
- Review authentication/authorization needs
- Analyze data security implications
- Evaluate input validation requirements
- Check for common security vulnerabilities
- Plan security testing strategies
Provided Capabilities
1. OWASP Top 10 Risk Assessment
Evaluate each of the 10 critical security risks:
- Broken Access Control
- Cryptographic Failures
- Injection
- Insecure Design
- Security Misconfiguration
- Vulnerable and Outdated Components
- Identification and Authentication Failures
- Software and Data Integrity Failures
- Security Logging and Monitoring Failures
- Server-Side Request Forgery (SSRF)
2. Security Requirements Identification
- Authentication requirements
- Authorization and access control
- Data encryption (at rest and in transit)
- Input validation and sanitization
- Output encoding
- Session management
- Password policies
- API security
- Secrets management
3. Threat Modeling
- Identify assets to protect
- Identify threat actors
- Map attack vectors
- Assess impact and likelihood
- Prioritize risks
4. Security Testing Strategy
- Security test cases
- Penetration testing scope
- Vulnerability scanning approach
- Security code review focus areas
Usage Guide
Step 1: Understand Feature Context
Read the requirements to understand:
- What data is being processed?
- Who will access this feature?
- What external systems are involved?
- What sensitive operations are performed?
- What user input is accepted?
Step 2: OWASP Top 10 Assessment
What ships with it
2 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.
- 5d ago First seen · 551 lines · 32 tokens per session scan A 9b16c10c111b
security-assessor is a skill published in the GitHub repository matteocervelli/llms (25 stars, last pushed 3mo ago), licensed MIT. It adds 32 tokens to every session and 3,668 once invoked, about $0.0002 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 2026-09-03.
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