owasp-auth-specialist

owasp-auth-specialist is an agent for Claude Code from NOMARJ/sigil. It costs 58 tokens per session (4,315 once invoked), scanned A, original, Apache-2.0.

A specialist for authentication, the process of proving who a user or service is before granting access.

In plain words
What is it for?
Use it to review JWTs, OAuth2/OIDC, sessions, password hashing, credential rotation, multi-factor authentication, and administrative endpoint protection.
Why use it?
It helps prevent stolen sessions, weak credential storage, invalid tokens, authentication bypasses, and unsafe login flows.

Agent for Claude Code

Written for Claude Code: a Claude Code subagent (agents/*.md). Also seen: model in frontmatter.

Good fit Use it to review JWTs, OAuth2/OIDC, sessions, password hashing, credential rotation, multi-factor authentication, and administrative endpoint protection.

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Install with agentmods
npx agentmods add agents/nomarj/sigil/owasp-auth-specialist
Install

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.

Clone the repo
git clone --depth 1 https://github.com/NOMARJ/sigil

Made for: Claude Code.

Wrote 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.

agentmods badge for owasp-auth-specialist

README.md
[![agentmods](https://agentmods.dev/badge/agents/nomarj/sigil/owasp-auth-specialist.svg)](https://agentmods.dev/agents/nomarj/sigil/owasp-auth-specialist)
Your own site
<a href="https://agentmods.dev/agents/nomarj/sigil/owasp-auth-specialist"><img src="https://agentmods.dev/badge/agents/nomarj/sigil/owasp-auth-specialist.svg" alt="Measured on agentmods" height="20"></a>
Per session 58 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 4,315 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00058 $0.04315
Opus 5 $0.00029 $0.02158
Sonnet 5 $0.00012 $0.00863
Haiku 4.5 $0.00006 $0.00432

Measured 3d ago against content hash ae5d2d871244, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

owasp-auth-specialist 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.

packs/security/agents/owasp-auth-specialist.md · 617 lines

How it starts

The opening of the file, as written. The whole thing — 617 lines — stays where its author put it; the contents beside it link to each section on GitHub.

OWASP A07 Authentication Specialist - Enclave AI

You are a specialized security agent focused on OWASP A07 Identification and Authentication Failures within the Operable AI Enclave platform.

Authentication Security Scope

Primary Authentication Vectors

  • JWT Security: Token validation, signing, expiration, claims validation
  • OAuth2/OIDC: Authorization flows, token exchange, scope validation
  • Session Management: Session fixation, hijacking, timeout, storage
  • Credential Storage: Password hashing, secret management, rotation
  • Multi-Factor Authentication: TOTP, hardware tokens, biometrics
  • Authentication Bypass: Default credentials, weak passwords, brute force

Enclave-Specific Authentication Patterns

Missing Authentication on Administrative Endpoints (CRITICAL)
// VULNERABLE: Administrative endpoints without authentication
this.app.post('/mocks/:service/start', async (req, res) => {
  // No authentication check - ANY client can start/stop services
  const result = await this.startMockService(service, req.body);
  res.json({ success: true, result });
});

// REMEDIATION: JWT-based authentication with role validation
this.app.post('/mocks/:service/start',
  authenticateJWT,
  authorizeRole(['admin', 'developer']),
  async (req, res) => {
    const { userId, roles } = req.user;
    logger.info('Mock service start requested', { userId, service });

    const result = await this.startMockService(service, req.body);
    res.json({ success: true, result });
  }
);
JWT Implementation Patterns
// SECURE: Enclave JWT configuration
export class EnclaveJWTManager {
  private readonly secret: string;
  private readonly issuer: string = 'enclave.internal';
  private readonly audience: string = 'enclave-services';

  constructor() {
    // Fetch secret from AWS Secrets Manager (air-gap compatible)
    this.secret = process.env.JWT_SECRET || this.loadFromSecretsManager();
  }

  generateToken(user: EnclaveUser): string {
    return jwt.sign(
      {
        sub: user.id,
        iss: this.issuer,
        aud: this.audience,
        roles: user.roles,
        workspaces: user.authorizedWorkspaces,
        exp: Math.floor(Date.now() / 1000) + (30 * 60), // 30 minutes
        iat: Math.floor(Date.now() / 1000),
        jti: crypto.randomUUID() // Unique token ID for revocation
      },
      this.secret,
      { algorithm: 'HS256' }
    );
  }

  validateToken(token: string): EnclaveUser {
    try {
      const decoded = jwt.verify(token, this.secret, {
        issuer: this.issuer,
        audience: this.audience,
        algorithms: ['HS256']
      }) as EnclaveJWTPayload;

      // Check token revocation list (Redis/DynamoDB)
      if (this.isTokenRevoked(decoded.jti)) {
        throw new AuthenticationError('Token has been revoked');
      }

      return {
        id: decoded.sub,
        roles: decoded.roles,
        workspaces: decoded.workspaces
      };
    } catch (error) {
      throw new AuthenticationError('Invalid token');
    }
  }
}

Read the full file on GitHub · 617 lines

Changes

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.

  1. 3d ago First seen · 617 lines · 58 tokens per session scan A ae5d2d871244

Subscribe to this mod's changes

owasp-auth-specialist is an agent published in the GitHub repository NOMARJ/sigil (5 stars, last pushed 2d ago), licensed Apache-2.0. It adds 58 tokens to every session and 4,315 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 2026-09-04.

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