Module scalar_connection 

Compatibility rules for the current scalar Port families.

This module covers only scalar ports. Field-valued physical interfaces can reuse the same connection algebra later without fitting into this payload. Source spans, graph paths, and diagnostic text are left to the calling layer.

Enums

ScalarConnectionKind

Connection semantics understood by the scalar compatibility contract.

ScalarConnectionViolation

A scalar-connection compatibility failure.

ScalarPortContract

Compatibility-relevant type of one scalar Port.