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 gohypergiant/agent-skills --skill accelint-security-best-practicesgit clone --depth 1 https://github.com/gohypergiant/agent-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/gohypergiant/agent-skills/accelint-security-best-practices)<a href="https://agentmods.dev/skills/gohypergiant/agent-skills/accelint-security-best-practices"><img src="https://agentmods.dev/badge/skills/gohypergiant/agent-skills/accelint-security-best-practices/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/gohypergiant/agent-skills/accelint-security-best-practices"><img src="https://agentmods.dev/badge/skills/gohypergiant/agent-skills/accelint-security-best-practices.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 1 finding, up to medium
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- medium Excessive Agency · line 34 Skill allows unbounded resource consumption (API calls, storage, compute). Without rate limits or quotas, a compromised or misbehaving agent can cause denial-of-service or cost overruns.Fix: Set explicit rate limits, timeouts, and resource quotas for API calls, file operations, and compute. Implement circuit breakers for runaway loops.
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 | $0.00145 | $0.04372 |
| Opus 5 | $0.00072 | $0.02186 |
| Sonnet 5 | $0.00029 | $0.00874 |
| Haiku 4.5 | $0.00015 | $0.00437 |
Grade A, and why
accelint-security-best-practices scanned grade A 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 11d 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.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
| `fetch(userProvidedUrl)` without validation | SSRF vulnerability | A10: SSRF | High | How it starts
The opening of the file, as written. The whole thing — 330 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Security Best Practices
Systematic security auditing and vulnerability detection for JavaScript/TypeScript applications. Combines audit workflow with OWASP Top 10 security patterns for production-ready code.
Framework-Agnostic Guidance: This skill provides security principles applicable across frameworks (Express, Fastify, Nest.js, Next.js, etc.). Code examples illustrate concepts using common patterns—adapt them to your project's specific framework and package manager (npm, yarn, pnpm, bun).
NEVER Do When Implementing Security
Note: For general best practices (type safety, code quality, documentation), use the respective accelint skills. This section focuses exclusively on security-specific anti-patterns.
-
NEVER hardcode secrets - API keys, tokens, passwords, or credentials in source code are immediately compromised when pushed to version control. Even private repositories leak secrets through employee turnover, third-party access, and git history. In 2024 breach analysis, 47% of exposed credentials came from
.envfiles accidentally committed then 'deleted' (but preserved in git history). Attackers scan public GitHub commits within minutes of push. Use environment variables exclusively. -
NEVER trust user input - Validate with schemas (Zod, Joi) covering type, format, size, and content.
-
NEVER concatenate user input into queries - Use parameterized queries, ORMs, or prepared statements exclusively. String concatenation in SQL, NoSQL, or shell commands enables injection attacks.
-
NEVER store sensitive data in localStorage - localStorage is vulnerable to XSS attacks where malicious scripts steal tokens. JWT tokens, session IDs, or credentials in localStorage persist across sessions and are accessible to any JavaScript code. Use httpOnly cookies for auth tokens.
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NEVER skip authorization checks - Authentication verifies identity; authorization verifies permission. Attackers will manipulate IDs, skip authentication, or guess URLs. Every endpoint accessing resources must verify the requesting user owns that resource or has appropriate role.
What ships with it
18 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.
- AGENTS.md 8.0 KB
- assets/output-report-template.md 9.5 KB
- README.md 6.2 KB
- references/authentication.md 18 KB
- references/authorization.md 18 KB
- references/csrf-protection.md 15 KB
- references/dependency-security.md 12 KB
- references/file-uploads.md 16 KB
- references/injection-prevention.md 20 KB
- references/input-validation.md 16 KB
- references/mfa.md 17 KB
- references/quick-reference.md 13 KB
- references/rate-limiting.md 14 KB
- references/secrets-management.md 11 KB
- references/security-headers.md 13 KB
- references/sensitive-data.md 14 KB
- references/ssrf-prevention.md 16 KB
- references/xss-prevention.md 14 KB
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.
- 11d ago First seen · 330 lines · 145 tokens per session scan A 27dc9f48c247
accelint-security-best-practices is a skill published in the GitHub repository gohypergiant/agent-skills (24 stars, last pushed yesterday), licensed Apache-2.0. It adds 145 tokens to every session and 4,372 once invoked, about $0.0007 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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