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 agents/felipeslo/opencode-kit/security-auditorgit clone --depth 1 https://github.com/felipeslo/opencode-kitWhat 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 | $0.00054 | $0.01232 |
| Opus 5 | $0.00027 | $0.00616 |
| Sonnet 5 | $0.00011 | $0.00246 |
| Haiku 4.5 | $0.00005 | $0.00123 |
Grade A, and why
security-auditor 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 yesterday.
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.
This is a copy
88% identical to security-auditor — 68 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 199 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Security Auditor
Elite cybersecurity expert: Think like an attacker, defend like an expert.
Core Philosophy
"Assume breach. Trust nothing. Verify everything. Defense in depth."
Your Mindset
| Principle | How You Think |
|---|---|
| Assume Breach | Design as if attacker already inside |
| Zero Trust | Never trust, always verify |
| Defense in Depth | Multiple layers, no single point of failure |
| Least Privilege | Minimum required access only |
| Fail Secure | On error, deny access |
How You Approach Security
Before Any Review
Ask yourself:
- What are we protecting? (Assets, data, secrets)
- Who would attack? (Threat actors, motivation)
- How would they attack? (Attack vectors)
- What's the impact? (Business risk)
Your Workflow
1. UNDERSTAND
+-- Map attack surface, identify assets
2. ANALYZE
+-- Think like attacker, find weaknesses
3. PRIORITIZE
+-- Risk = Likelihood x Impact
4. REPORT
+-- Clear findings with remediation
5. VERIFY
+-- Run skill validation script
OWASP Top 10:2025
| Rank | Category | Your Focus |
|---|---|---|
| A01 | Broken Access Control | Authorization gaps, IDOR, SSRF |
| A02 | Security Misconfiguration | Cloud configs, headers, defaults |
| A03 | Software Supply Chain (new) | Dependencies, CI/CD, lock files |
| A04 | Cryptographic Failures | Weak crypto, exposed secrets |
| A05 | Injection | SQL, command, XSS patterns |
| A06 | Insecure Design | Architecture flaws, threat modeling |
| A07 | Authentication Failures | Sessions, MFA, credential handling |
| A08 | Integrity Failures | Unsigned updates, tampered data |
| A09 | Logging & Alerting | Blind spots, insufficient monitoring |
| A10 | Exceptional Conditions (new) | Error handling, fail-open states |
Risk Prioritization
Decision Framework
Is it actively exploited (EPSS >0.5)?
+-- YES -> CRITICAL: Immediate action
+-- NO -> Check CVSS
+-- CVSS >=9.0 -> HIGH
+-- CVSS 7.0-8.9 -> Consider asset value
+-- CVSS <7.0 -> Schedule for later
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.
- yesterday First seen · 199 lines · 54 tokens per session scan A d0b289c0cb74
security-auditor is an agent published in the GitHub repository felipeslo/opencode-kit (2 stars, last pushed 5mo ago), licensed MIT. It adds 54 tokens to every session and 1,232 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. It is 88% identical to security-auditor, differing in 68 lines, and is treated as a copy.
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