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 HoangNguyen0403/agent-skills-standard --skill common-security-auditgit clone --depth 1 https://github.com/HoangNguyen0403/agent-skills-standardWrote 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/hoangnguyen0403/agent-skills-standard/common-security-audit)<a href="https://agentmods.dev/skills/hoangnguyen0403/agent-skills-standard/common-security-audit"><img src="https://agentmods.dev/badge/skills/hoangnguyen0403/agent-skills-standard/common-security-audit/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/hoangnguyen0403/agent-skills-standard/common-security-audit"><img src="https://agentmods.dev/badge/skills/hoangnguyen0403/agent-skills-standard/common-security-audit.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00077 | $0.00990 |
| Opus 5 | $0.00039 | $0.00495 |
| Sonnet 5 | $0.00015 | $0.00198 |
| Haiku 4.5 | $0.00008 | $0.00099 |
Grade A, and why
common-security-audit 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 13d 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 — 95 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Security Audit
Priority: P0 (CRITICAL)
1. Scan for Hardcoded Secrets
See implementation examples for secrets scanning commands.
Covers: Backend source, frontend bundles (REACT_APP_, NEXT_PUBLIC_, VITE_), mobile configs (BuildConfig, iOS configurations, strings.xml).
2. Detect Data Leakage in Logs
See implementation examples for log leakage scanning commands across Node, Go, Dart, Java, Swift.
3. Map Injection Surfaces & Auth Coverage
See implementation examples for injection detection and auth coverage measurement.
4. Run Dependency CVE Scans
- Node/Python/Rust:
npm audit --audit-level=high|pip-audit|cargo audit - Go/Dart:
go list -m -u all|dart pub outdated --json - Java/Mobile:
mvn dependency:list/./gradlew dependencies|pod audit/ Gradle scan
5. Infrastructure & Adversarial Entry Points
See implementation examples for RCE/SSRF/Path Traversal and infrastructure hardening (Docker/K8s).
6. Frontend-Specific Audit
- Exposed Secrets:
grep -rE "(REACT_APP_|NEXT_PUBLIC_|VITE_)" . --include="*.ts*" --include="*.env*" - DOM Sinks & Source Maps: Check
dangerouslySetInnerHTML,innerHTML,eval, and.mapfiles in prod builds.
7. Mobile-Specific Audit
See mobile audit commands for insecure storage (credential stores/Keystore), cert pinning, debug flags, and deep links.
8. Business Logic & Advanced Attacks
- BOLA/IDOR: Verify entity lookups always enforce tenant/owner ownership checks (e.g. any
findByIdwithout anownerfilter is a P0 IDOR vulnerability). - JWT / Mass Assignment: Check missing
exp, weak keys, and uncontrolled property spread (...req.body). - Race / GraphQL: Verify atomic DB transactions, introspection disabled, and query depth limits.
Scoring Impact
| Finding | Threshold | Severity | Deduction |
|---|---|---|---|
| Hardcoded Secrets | Any match | P0 | -25 |
| Plain-text PII in Logs | Any match | P0 | -20 |
| Unguarded Routes > 20% | > 0.2 | P0 | -15 |
| Raw SQL Concatenation | Any match | P1 | -10 |
| Response Leakage (Stack) | > 0 | P1 | -10 |
| Insecure Mobile Storage | Token in plaintext | P1 | -15 |
| Missing Cert Pinning | No pinning detected | P2 | -8 |
| DOM XSS Sinks | Any match | P1 | -10 |
What ships with it
6 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.
- 13d ago First seen · 95 lines · 77 tokens per session scan A b9ed3c2704e2
common-security-audit is a skill published in the GitHub repository HoangNguyen0403/agent-skills-standard (565 stars, last pushed 3d ago), licensed MIT. It adds 77 tokens to every session and 990 once invoked, about $0.0004 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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