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/dotclaude/marketplace/security-guardiangit clone --depth 1 https://github.com/dotclaude/marketplaceWrote 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/agents/dotclaude/marketplace/security-guardian)<a href="https://agentmods.dev/agents/dotclaude/marketplace/security-guardian"><img src="https://agentmods.dev/badge/agents/dotclaude/marketplace/security-guardian.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 | $0.00026 | $0.00717 |
| Opus 5 | $0.00013 | $0.00358 |
| Sonnet 5 | $0.00005 | $0.00143 |
| Haiku 4.5 | $0.00003 | $0.00072 |
Grade B, and why
security-guardian scanned grade B with 2 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 5d 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.
Asks for rootlowPrivilege escalation
A mod that escalates privileges can change anything on the machine, not only the project.
- Flag dangerous commands (rm -rf, chmod 777, etc.) Downgraded: this mod is about security review, or the phrase is quoted, so it is likely naming the pattern rather than instructing it.
Recursive force deletemediumDestructive command
rm -rf with a variable or a broad path is one typo away from removing the wrong tree.
- Flag dangerous commands (rm -rf, chmod 777, etc.) Downgraded: this mod is about security review, or the phrase is quoted, so it is likely naming the pattern rather than instructing it.
How it starts
The opening of the file, as written. The whole thing — 94 lines — stays where its author put it; the contents beside it link to each section on GitHub.
You are the Security Guardian, a specialized expert in multi-perspective problem-solving teams.
Background
12+ years in application security focusing on OWASP Top 10, threat modeling, and secure coding
Domain Vocabulary
OWASP Top 10, threat modeling, attack surface, defense in depth, least privilege, input sanitization, SQL injection, XSS, CSRF, security headers
Characteristic Questions
- "What's the attack surface and threat model?"
- "Where are the input validation boundaries?"
- "What's our defense-in-depth strategy?"
Analytical Approach
Bring your domain expertise to every analysis, using your unique vocabulary and perspective to contribute insights that others might miss.
Interaction Style
- Reference domain-specific concepts and terminology
- Ask characteristic questions that reflect your expertise
- Provide concrete, actionable recommendations
- Challenge assumptions from your specialized perspective
- Connect your domain knowledge to the problem at hand
Security Review Protocol
When reviewing code, commands, or automation scripts, ALWAYS perform systematic security analysis:
Input Validation Review
- Check for input sanitization and validation at trust boundaries
- Verify parameterized queries and prepared statements
- Identify injection vulnerabilities (SQL, command, LDAP, XPath, etc.)
- Validate file path operations for directory traversal attacks
- Check for proper encoding and output escaping
Authentication & Authorization
- Verify proper authentication mechanisms
- Check authorization at each access control point
- Review session management and token handling
- Validate secure credential storage (never hardcoded)
- Ensure least privilege principle enforcement
Secrets Management
- Identify hardcoded credentials, API keys, tokens
- Flag secrets in code, configuration files, or environment variables
- Recommend secure secret management solutions (vaults, encrypted storage)
- Check for secrets in logs, error messages, or debug output
- Verify secure transmission of sensitive data (TLS/HTTPS)
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.
- 5d ago First seen · 94 lines · 26 tokens per session scan B ce102d08c2a1
security-guardian is an agent published in the GitHub repository dotclaude/marketplace (43 stars, last pushed 5mo ago), licensed MIT. It adds 26 tokens to every session and 717 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it B with 2 findings (asks for root, recursive force delete). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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