The CXU data model defines a DraftCXU object with a cxu_id string formatted as "1220" plus a SHA-256 hex value, producing a 68-character identifier so that each CXU has a standardized unique ID.

DraftCXU:

— PYRANA_PLATFORM_ARCHITECTURE_REFERENCE.md

cxu_id: str # "1220" + SHA-256 hex (68 chars)

— PYRANA_PLATFORM_ARCHITECTURE_REFERENCE.md

### CXU Data Model

— PYRANA_PLATFORM_ARCHITECTURE_REFERENCE.md