Implement comprehensive security hardening with defense-in-depth strategy through coordinated multi-agent orchestration:
[Extended thinking: This workflow implements a defense-in-depth security strategy across all application layers. It coordinates specialized security agents to perform comprehensive assessments, implement layered security controls, and establish continuous security monitoring. The approach follows modern DevSecOps principles with shift-left security, automated scanning, and compliance validation. Each phase builds upon previous findings to create a resilient security posture that addresses both current vulnerabilities and future threats.]
Use this skill when
Running a coordinated security hardening program
Establishing defense-in-depth controls across app, infra, and CI/CD
Prioritizing remediation from scans and threat modeling
Do not use this skill when
You only need a quick scan without remediation work
You lack authorization for security testing or changes
The environment cannot tolerate invasive security controls
Instructions
Execute Phase 1 to establish a security baseline.
Apply Phase 2 remediations for high-risk issues.
Implement Phase 3 controls and validate defenses.
Complete Phase 4 validation and compliance checks.
Safety
Avoid intrusive testing in production without approval.
Ensure rollback plans exist before hardening changes.
Phase 1: Comprehensive Security Assessment
1. Initial Vulnerability Scanning
Use Task tool with subagent_type="security-auditor"
Prompt: "Perform comprehensive security assessment on: $ARGUMENTS. Execute SAST analysis with Semgrep/SonarQube, DAST scanning with OWASP ZAP, dependency audit with Snyk/Trivy, secrets detection with GitLeaks/TruffleHog. Generate SBOM for supply chain analysis. Identify OWASP Top 10 vulnerabilities, CWE weaknesses, and CVE exposures."
Context: Initial baseline for all remediation efforts
2. Threat Modeling and Risk Analysis
Use Task tool with subagent_type="security-auditor"
Prompt: "Conduct threat modeling using STRIDE methodology for: $ARGUMENTS. Analyze attack vectors, create attack trees, assess business impact of identified vulnerabilities. Map threats to MITRE ATT&CK framework. Prioritize risks based on likelihood and impact."
Output: Threat model diagrams, risk matrix with prioritized vulnerabilities, attack scenario documentation, business impact analysis
Context: Uses vulnerability scan results to inform threat priorities
3. Architecture Security Review
Use Task tool with subagent_type="backend-api-security::backend-architect"
Prompt: "Review architecture for security weaknesses in: $ARGUMENTS. Evaluate service boundaries, data flow security, authentication/authorization architecture, encryption implementation, network segmentation. Design zero-trust architecture patterns. Reference threat model and vulnerability findings."
Output: Security architecture assessment, zero-trust design recommendations, service mesh security requirements, data classification matrix
Context: Incorporates threat model to address architectural vulnerabilities
Phase 2: Vulnerability Remediation
4. Critical Vulnerability Fixes
Use Task tool with subagent_type="security-auditor"
Prompt: "Coordinate immediate remediation of critical vulnerabilities (CVSS 7+) in: $ARGUMENTS. Fix SQL injections with parameterized queries, XSS with output encoding, authentication bypasses with secure session management, insecure deserialization with input validation. Apply security patches for CVEs."
Output: Patched code with vulnerability fixes, security patch documentation, regression test requirements
Context: Addresses high-priority items from vulnerability assessment
5. Backend Security Hardening
Use Task tool with subagent_type="backend-api-security::backend-security-coder"
Prompt: "Implement comprehensive backend security controls for: $ARGUMENTS. Add input validation with OWASP ESAPI, implement rate limiting and DDoS protection, secure API endpoints with OAuth2/JWT validation, add encryption for data at rest/transit using AES-256/TLS 1.3. Implement secure logging without PII exposure."
Context: Extends security to mobile platforms if applicable
Phase 3: Security Controls Implementation
8. Authentication and Authorization Enhancement
Use Task tool with subagent_type="security-auditor"
Prompt: "Implement modern authentication system for: $ARGUMENTS. Deploy OAuth2/OIDC with PKCE, implement MFA with TOTP/WebAuthn/FIDO2, add risk-based authentication, implement RBAC/ABAC with principle of least privilege, add session management with secure token rotation."
Output: Authentication service configuration, MFA implementation, authorization policies, session management system
Context: Strengthens access controls based on architecture review
9. Infrastructure Security Controls
Use Task tool with subagent_type="deployment-strategies::deployment-engineer"
Prompt: "Deploy infrastructure security controls for: $ARGUMENTS. Configure WAF rules for OWASP protection, implement network segmentation with micro-segmentation, deploy IDS/IPS systems, configure cloud security groups and NACLs, implement DDoS protection with rate limiting and geo-blocking."
