A Context Unit (CXU) is defined as an atomic, content-addressable claim linked to verbatim evidence, classification tier, lifecycle state, and graph context so that retrieval is structured around accountable knowledge units rather than opaque chunks.

It replaces opaque chunk retrieval with the Context Unit (CXU): an atomic, content-addressable claim

— Beyond Retrieval - Pyrana Context Engine Whitepaper.pdf

linked to verbatim evidence, classification tier, lifecycle state, and graph context.

— Beyond Retrieval - Pyrana Context Engine Whitepaper.pdf

The Pyrana Context Engine is designed for environments where retrieval must be explainable, auditable, and governable.

— Beyond Retrieval - Pyrana Context Engine Whitepaper.pdf