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 agentmods add skills/petrkindlmann/qa-skills/security-testingnpx skills add petrkindlmann/qa-skills --skill security-testinggit clone --depth 1 https://github.com/petrkindlmann/qa-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/petrkindlmann/qa-skills/security-testing)<a href="https://agentmods.dev/skills/petrkindlmann/qa-skills/security-testing"><img src="https://agentmods.dev/badge/skills/petrkindlmann/qa-skills/security-testing.svg" alt="Measured on agentmods" 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 | $0.00248 | $0.04614 |
| Opus 5 | $0.00124 | $0.02307 |
| Sonnet 5 | $0.00050 | $0.00923 |
| Haiku 4.5 | $0.00025 | $0.00461 |
Grade B, and why
security-testing scanned grade B with 1 finding 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.
Cloud metadata endpointmediumServer-side request forgery
One request to 169.254.169.254 can return temporary IAM credentials.
IDOR lets user A read user B's orders, and a webhook field reaches `169.254.169.254`. This skill Downgraded: this mod is about security review, or the phrase is quoted, so it is likely naming the pattern rather than instructing it.
How it starts
The opening of the file, as written. The whole thing — 249 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Discovery Questions
Check .agents/qa-project-context.md first — if it exists, use it and skip anything already answered there (auth mechanism, compliance requirements, infrastructure). Then:
- Threat model: Has the team identified key assets, threat actors, and attack surfaces? If not, do a lightweight threat model before writing tests — it tells you which categories matter most.
- Auth mechanism: Session cookies, JWT, OAuth 2.0/OIDC, API keys, or MFA? Each has distinct negative-path tests (alg confusion, session fixation, state tampering).
- Compliance requirements: SOC 2, HIPAA, PCI DSS, GDPR? These mandate specific controls — map them with
compliance-testing; this skill only proves the controls behave. - Existing security tooling: Already running OSV-Scanner, Snyk, Dependabot, Semgrep, or ZAP? Check CI config for existing security stages before adding duplicates.
- API surface: REST, GraphQL, gRPC? Each protocol has specific injection and authorization vectors.
- Deployment model: Cloud (AWS/GCP/Azure), containers, serverless? Cloud-metadata endpoints are prime SSRF targets and misconfiguration is A02.
Core Principles
-
Security is continuous, not a phase. Scans run in CI on every PR, not as a quarterly penetration test. A vulnerability caught on the PR that introduced it costs minutes; the same vulnerability found in prod costs an incident.
-
OWASP Top 10 is the floor, not the ceiling. It covers the most common impactful classes. Domain-specific threats (healthcare data, financial transactions, multi-tenant isolation) need their own analysis on top.
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.
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.
- 6d ago First seen · 249 lines · 248 tokens per session scan B b02b6050d6c4
security-testing is a skill published in the GitHub repository petrkindlmann/qa-skills (108 stars, last pushed 2mo ago), licensed MIT. It adds 248 tokens to every session and 4,614 once invoked, about $0.0012 per session on Opus 5. A static security scan graded it B with 1 finding (cloud metadata endpoint). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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