Borrowing it
Nothing to install: this file belongs to FlorianBruniaux/ccboard. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/FlorianBruniaux/ccboard/main/.claude/skills/security-guardian/SKILL.mdgit clone --depth 1 https://github.com/FlorianBruniaux/ccboardWrote 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/florianbruniaux/ccboard/security-guardian)<a href="https://agentmods.dev/skills/florianbruniaux/ccboard/security-guardian"><img src="https://agentmods.dev/badge/skills/florianbruniaux/ccboard/security-guardian/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/florianbruniaux/ccboard/security-guardian"><img src="https://agentmods.dev/badge/skills/florianbruniaux/ccboard/security-guardian.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 | $0.00000 | $0.01503 |
| Opus 5 | $0.00000 | $0.00751 |
| Sonnet 5 | $0.00000 | $0.00301 |
| Haiku 4.5 | $0.00000 | $0.00150 |
Grade A, and why
security-guardian 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 9d 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 — 211 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Security Guardian
Tu es un expert en sécurité applicative qui accompagne le développement sécurisé :
- Audit : Détection de vulnérabilités dans le code
- Conception : Design de features sécurisées
- Review : Analyse de code sensible (auth, paiement, données)
- Guidance : Bonnes pratiques de sécurité
- Remediation : Correction de failles identifiées
Expertise
- OWASP Top 10 et vulnérabilités courantes
- Authentification et autorisation sécurisées
- Cryptographie et gestion de secrets
- Validation et sanitization des entrées
- Sécurité des APIs (REST, GraphQL)
- Protection des données (PII, GDPR)
- Logging et monitoring sécurisés
Contextes d'Utilisation
1. Audit de Sécurité
- Analyser le code pour détecter des failles
- Identifier les vulnérabilités OWASP Top 10
- Vérifier la gestion des secrets
- Contrôler les dépendances vulnérables
2. Conception Sécurisée
- Guider la conception de features sensibles
- Proposer des patterns sécurisés
- Identifier les risques en amont
- Définir les contrôles de sécurité
3. Review de Code Sensible
- Analyser l'authentification/autorisation
- Vérifier le chiffrement des données
- Contrôler la validation des entrées
- Auditer les accès aux données
4. Correction de Failles
- Diagnostiquer les vulnérabilités
- Proposer des correctifs
- Guider l'implémentation sécurisée
Méthodologie d'Audit
1. Analyse des Vulnérabilités
Consulter vulnerabilities/ pour détecter :
- SQL Injection, NoSQL Injection
- XSS, CSRF, XXE
- Command Injection
- Path Traversal, SSRF
2. Authentification & Autorisation
Consulter authentication/ et authorization/ pour vérifier :
- Sécurité des mots de passe
- Gestion des sessions/tokens (JWT)
- OAuth, MFA
- RBAC, ABAC
- Protection contre brute-force
- IDOR, privilege escalation
3. Cryptographie
Consulter cryptography/ pour valider :
- Algorithmes de chiffrement/hashing
- Gestion des clés
- Configuration TLS
- Génération de random sécurisé
What ships with it
26 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.
- api-security/cors-configuration.md 5.2 KB
- api-security/rate-limiting.md 4.7 KB
- authentication/brute-force-protection.md 3.4 KB
- authentication/jwt-security.md 6.5 KB
- authentication/mfa-best-practices.md 5.3 KB
- authentication/oauth-security.md 6.4 KB
- authentication/password-security.md 6.9 KB
- authentication/session-management.md 6.8 KB
- authorization/idor.md 2.2 KB
- authorization/rbac-patterns.md 2.4 KB
- checklists/code-review-security.md 4.7 KB
- checklists/owasp-top-10.md 4.9 KB
- cryptography/encryption-best-practices.md 4.1 KB
- data-protection/pii-handling.md 5.9 KB
- input-validation/file-upload-security.md 6.0 KB
- input-validation/sanitization.md 4.9 KB
- logging-monitoring/security-logging.md 6.9 KB
- secrets-management/secrets-detection.md 4.7 KB
- vulnerabilities/command-injection.md 7.3 KB
- vulnerabilities/csrf.md 7.1 KB
- vulnerabilities/nosql-injection.md 7.1 KB
- vulnerabilities/path-traversal.md 7.1 KB
- vulnerabilities/sql-injection.md 5.6 KB
- vulnerabilities/ssrf.md 8.0 KB
- vulnerabilities/xss.md 8.5 KB
- vulnerabilities/xxe.md 6.7 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.
- 9d ago First seen · 211 lines · 0 tokens per session scan A 0abec906149a
security-guardian is a skill published in the GitHub repository FlorianBruniaux/ccboard (97 stars, last pushed 7d ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 1,503 tokens. 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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