# KEYTRON Enterprise Engineering & Technical Documentation (Full Specification)

## Architectural Principles
KEYTRON operates on a strict Clean Architecture, MVVM design pattern, and modular microservice methodology. We eliminate client-side bundle bloat, enforce zero un-minified dependencies, and sanitize structured microdata using Schema.org specifications.

### Technical Stack & Infrastructure
- **Frontend Layer**: React 18, Vite, Framer Motion, Bootstrap 5, Lucide Icons, Three.js (React Three Fiber).
- **Backend & Logic Engine**: PHP 8 REST API microservices, Node.js, Express server endpoints, parameterized SQL queries.
- **Database & Multitenancy**: Isolated schema segregation for enterprise tenants, row-level security scopes, MySQL relational clusters, PostgreSQL, Vector database embeddings.
- **Search & Generative Optimization**: Schema.org JSON-LD structured schemas, Answer Engine Optimization (AEO), Generative Engine Optimization (GEO), Geographic / Local 3-Pack Schema.

### Princeton GEO Benchmark Verification & Metrics
According to empirical RAG research benchmarks (Aggarwal et al., Princeton / Georgia Tech / Allen Institute):
- **Direct Expert Quotation**: +41% word count attribution lift and +28% subjective impression lift.
- **Numerical Statistics**: +37% impression lift in LLM answer synthesis.
- **Explicit Technical Citations**: +34.4% visibility lift across vector search cross-encoders.

### Enterprise Security & Handoff SLA
1. **100% IP Transfer**: Full client ownership of all repository source code, database migrations, and build manifests.
2. **1-Year Warranty**: Complimentary bug resolution and security auditing for 12 months post-deployment.
3. **Audited Performance**: All web platforms tested against Lighthouse Core Web Vitals to guarantee sub-1.2s LCP.