The Context Engine is defined as a multi-backend Knowledge-Augmented Graph system with five storage and messaging backends so that knowledge, vectors, cache, and coordination are distributed across specialized services.

## 2. Context Engine (pyrana-context-engine)

— PYRANA_PLATFORM_ARCHITECTURE_REFERENCE.md

Multi-backend Knowledge-Augmented Graph (KAG) system

— PYRANA_PLATFORM_ARCHITECTURE_REFERENCE.md

with five storage/messaging backends

— PYRANA_PLATFORM_ARCHITECTURE_REFERENCE.md