rendertrust: Skill for Claude Code

Security Audit Skill

Purpose

Guide security validation with RLS enforcement, OWASP compliance, and vulnerability detection following security-first architecture.

When This Skill Applies

Invoke this skill when:

• Validating RLS policies
• Auditing API routes for auth
• Vulnerability scanning
• Pre-deployment security review
• Checking for exposed credentials
• Reviewing database access patterns

Stop-the-Line Conditions

FORBIDDEN Patterns

// FORBIDDEN: Direct Prisma calls (bypass RLS)
const users = await prisma.user.findMany();
// Must use: withUserContext, withAdminContext, or withSystemContext

// FORBIDDEN: Missing authentication on protected routes
export async function GET(req: Request) {
  // No auth check before accessing user data
  return getUserData();
}

// FORBIDDEN: Exposed credentials
const API_KEY = "sk_live_abc123"; // Hardcoded secret

// FORBIDDEN: SQL injection vulnerability
const query = `SELECT * FROM users WHERE id = ${userId}`; // Interpolated

CORRECT Patterns

// CORRECT: RLS context wrapper
const users = await withUserContext(prisma, userId, async (client) => {
  return client.user.findMany();
});

// CORRECT: Auth check before data access
export async function GET(req: Request) {
  const { userId } = await auth();
  if (!userId) {
    return new Response("Unauthorized", { status: 401 });
  }
  return getUserData(userId);
}

// CORRECT: Environment variables for secrets
const API_KEY = process.env.STRIPE_SECRET_KEY;

// CORRECT: Parameterized queries
const user = await prisma.$queryRaw`SELECT * FROM users WHERE id = ${userId}`;

Security Audit Checklist

1. RLS Validation

• All database operations use context wrappers
• No direct Prisma calls in route handlers
• User isolation verified (user A cannot see user B's data)
• Admin operations properly scoped

# Find potential RLS bypasses
grep -r "prisma\." --include="*.ts" app/ lib/ | grep -v "withUserContext\|withAdminContext\|withSystemContext"