Pyrana is defined not as 'RAG plus a graph' but as a governed knowledge engine that uses retrieval strategies appropriate to the shape and sensitivity of the question so that retrieval behavior matches query context and risk.

Pyrana is not "RAG plus a graph."

— Beyond Retrieval - Pyrana Context Engine Whitepaper.pdf

It is a governed knowledge engine

— Beyond Retrieval - Pyrana Context Engine Whitepaper.pdf

uses retrieval strategies appropriate to the shape and sensitivity of the question

— Beyond Retrieval - Pyrana Context Engine Whitepaper.pdf