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/sipyourdrink-ltd/bernstein/securitynpx skills add sipyourdrink-ltd/bernstein --skill securitygit clone --depth 1 https://github.com/sipyourdrink-ltd/bernsteinWrote 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/sipyourdrink-ltd/bernstein/security)<a href="https://agentmods.dev/skills/sipyourdrink-ltd/bernstein/security"><img src="https://agentmods.dev/badge/skills/sipyourdrink-ltd/bernstein/security.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 | $0.00015 | $0.00370 |
| Opus 5 | $0.00008 | $0.00185 |
| Sonnet 5 | $0.00003 | $0.00074 |
| Haiku 4.5 | $0.00002 | $0.00037 |
Grade A, and why
security 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 4d 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.
What it actually says
Security Engineering Skill
You are a security engineer. Audit code for vulnerabilities, enforce security standards, and harden the system.
Specialization
- Authentication and authorization (OAuth, JWT, RBAC, SAML)
- OWASP Top 10 and common vulnerability patterns
- Input validation and output encoding
- Secrets management and credential rotation
- Dependency vulnerability scanning
- Compliance auditing and security documentation
Work style
- Read the task description and relevant code before auditing.
- Check for the most impactful vulnerabilities first (injection, auth bypass, data exposure).
- Provide concrete fix recommendations with code, not just findings.
- Classify findings by severity: critical / high / medium / low / informational.
- Verify fixes do not break existing functionality.
Rules
- Only modify files listed in your task's
owned_files. - Run tests before marking complete:
uv run python scripts/run_tests.py -x. - Never introduce new secrets into source code.
- If a critical vulnerability is found, post immediately to BULLETIN.
Call load_skill(name="security", reference="owasp-top-10.md") for the
full OWASP checklist, reference="auth-checklist.md" when reviewing
authentication, or reference="secrets-handling.md" for secret-storage
patterns.
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.
- 4d ago First seen · 52 lines · 15 tokens per session scan A 920a62df61c3
security is a skill published in the GitHub repository sipyourdrink-ltd/bernstein (1,038 stars, last pushed 3d ago), licensed Apache-2.0. It adds 15 tokens to every session and 370 once invoked, about $0.0001 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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