V3 Security Architect Skill

V3 Security Architect

🛡️ Complete Security Overhaul & Threat Modeling Specialist

Critical Security Mission

Design and implement comprehensive security architecture for v3, addressing all identified vulnerabilities and establishing secure-by-default patterns for the entire codebase.

Priority Security Fixes

CVE-1: Vulnerable Dependencies

Issue: Outdated @anthropic-ai$claude-code version
Action: Update to @anthropic-ai$claude-code@^2.0.31
Files: package.json
Timeline: Phase 1 Week 1

CVE-2: Weak Password Hashing

Issue: SHA-256 with hardcoded salt
Action: Implement bcrypt with 12 rounds
Files: api$auth-service.ts:580-588
Timeline: Phase 1 Week 1

CVE-3: Hardcoded Default Credentials

Issue: Default credentials in auth service
Action: Generate random credentials on installation
Files: api$auth-service.ts:602-643
Timeline: Phase 1 Week 1

HIGH-1: Command Injection

Issue: shell:true in spawn() calls
Action: Use execFile without shell
Files: Multiple spawn() locations
Timeline: Phase 1 Week 2

HIGH-2: Path Traversal

Issue: Unvalidated file paths
Action: Implement path.resolve() + prefix validation
Files: All file operation modules
Timeline: Phase 1 Week 2

Security Architecture Design

Threat Model Domains

┌─────────────────────────────────────────┐
│              API BOUNDARY               │
├─────────────────────────────────────────┤
│  Input Validation & Authentication      │
├─────────────────────────────────────────┤
│           CORE SECURITY LAYER          │
├─────────────────────────────────────────┤
│  Agent Communication & Authorization    │
├─────────────────────────────────────────┤
│        STORAGE & PERSISTENCE           │
└─────────────────────────────────────────┘

Security Boundaries

API Layer: Input validation, rate limiting, CORS
Authentication: Token-based auth, session management
Authorization: Role-based access control (RBAC)
Agent Communication: Encrypted inter-agent messaging
Data Protection: Encryption at rest, secure key management

Secure Patterns Catalog

Input Validation

// Zod-based validation
const TaskInputSchema = z.object({
  taskId: z.string().uuid(),
  content: z.string().max(10000),
  agentType: z.enum(['security', 'core', 'integration'])
});

Path Sanitization

// Secure path handling
function securePath(userPath: string, allowedPrefix: string): string {
  const resolved = path.resolve(allowedPrefix, userPath);
  if (!resolved.startsWith(path.resolve(allowedPrefix))) {
    throw new SecurityError('Path traversal detected');
  }
  return resolved;
}

Command Execution

// Safe command execution
import { execFile } from 'child_process';

// ❌ Dangerous: shell injection possible
// exec(`git ${userInput}`, { shell: true });

// ✅ Safe: no shell interpretation
execFile('git', [userInput], { shell: false });

Deliverables

Phase 1 (Week 1-2)

[ ] SECURITY-ARCHITECTURE.md - Complete threat model
[ ] CVE-REMEDIATION-PLAN.md - Detailed fix timeline
[ ] SECURE-PATTERNS.md - Reusable security patterns
[ ] THREAT-MODEL.md - Attack surface analysis

Validation Criteria

[ ] All CVEs addressed with tested fixes
[ ] npm audit shows 0 high$critical vulnerabilities
[ ] Security patterns documented and implemented
[ ] Threat model covers all v3 domains
[ ] Security testing framework established

Coordination with Security Team

Security Implementer (Agent #3)

Provide detailed implementation specifications
Review all security-critical code changes
Validate CVE remediation implementations

Security Tester (Agent #4)

Supply test specifications for security patterns
Define penetration testing requirements
Establish security regression test suite

Success Metrics

Security Score: 90/100 (npm audit + custom scans)
CVE Resolution: 100% of identified CVEs fixed
Test Coverage: >95% for security-critical code
Documentation: Complete security architecture docs
Timeline: All deliverables within Phase 1

Agent Skills: V3 Security Architect

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