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/phuoctrung-ppt/ai-sdlc-workflow/securitynpx skills add phuoctrung-ppt/ai-sdlc-workflow --skill securitygit clone --depth 1 https://github.com/phuoctrung-ppt/ai-sdlc-workflowWrote 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/phuoctrung-ppt/ai-sdlc-workflow/security)<a href="https://agentmods.dev/skills/phuoctrung-ppt/ai-sdlc-workflow/security"><img src="https://agentmods.dev/badge/skills/phuoctrung-ppt/ai-sdlc-workflow/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 | $0.00065 | $0.01444 |
| Opus 5 | $0.00032 | $0.00722 |
| Sonnet 5 | $0.00013 | $0.00289 |
| Haiku 4.5 | $0.00006 | $0.00144 |
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 3d 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 — 155 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Security Skill
Universal security patterns and checks. All project-specific compliance requirements (GDPR, HIPAA, RBAC roles, multi-tenancy isolation) are in AGENTS.md §5.
When to Use This Skill
- Implementing authentication or authorization
- Reviewing code for security vulnerabilities
- Running a security audit (
/security-audit) - Adding rate limiting, input validation, or encryption
- Hardening a service before production
OWASP Top 10 Quick Reference
| # | Risk | Key mitigation |
|---|---|---|
| A01 | Broken Access Control | Check permissions on every request, deny by default |
| A02 | Cryptographic Failures | Encrypt PII at rest, TLS in transit, never roll your own crypto |
| A03 | Injection | Parameterized queries, ORM only, never string interpolation in SQL |
| A04 | Insecure Design | Threat model early; security by design not afterthought |
| A05 | Security Misconfiguration | Disable defaults, remove debug endpoints, lock down CORS |
| A06 | Vulnerable Components | npm audit, pip-audit, dependabot — keep deps updated |
| A07 | Auth/Session Failures | HttpOnly cookies, rotate tokens, secure session management |
| A08 | Software Integrity Failures | Verify dependencies (lockfiles), signed containers, CI integrity |
| A09 | Logging Failures | Log security events, never log secrets/PII, centralize logs |
| A10 | SSRF | Allowlist outbound URLs, block internal CIDR ranges |
See owasp-top10.md for implementation details.
Authentication Checklist
- JWT signed with RS256 (asymmetric) or HS256 with strong secret (≥256 bit)
- Access tokens short-lived (15min); refresh tokens long-lived but rotatable
- Refresh token rotation — invalidate old token on use (detect token theft)
- HttpOnly + Secure + SameSite=Strict cookies for web — never localStorage for tokens
- Passwords hashed with bcrypt/argon2 (min cost factor 12)
- MFA available for elevated-privilege accounts (per
AGENTS.md §5) - Account lockout after N failed attempts (with exponential backoff)
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.
- 3d ago First seen · 155 lines · 65 tokens per session scan A 4009a61293bd
security is a skill published in the GitHub repository phuoctrung-ppt/ai-sdlc-workflow (2 stars, last pushed 17d ago), licensed MIT. It adds 65 tokens to every session and 1,444 once invoked, about $0.0003 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 2026-08-31.
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chat-perf
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