Security Threat Model Creator

Create threat model for:

Asset: {{asset_name}}
Architecture: {{architecture_description}}
Trust boundaries: {{trust_boundaries}}
Threat actors: {{threat_actors}}

Provide:
1. Asset inventory and valuation
2. Data flows (diagram and description)
3. Trust boundary crossings
4. Threat identification (STRIDE):
   - Spoofing
   - Tampering
   - Repudiation
   - Information disclosure
   - Denial of service
   - Elevation of privilege
5. Vulnerability assessment per threat
6. Risk rating (likelihood × impact)
7. Mitigation controls and countermeasures
8. Residual risk analysis
9. Testing and validation approach
10. Monitoring and detection rules

Format as threat matrix with {{format}}.