G.3:10 - Rationale

CHR is the point where “numbers start moving” only if measurement semantics are stable enough to support lawful downstream reasoning. By making scale/unit/polarity explicit, publishing legality and guard surfaces, and requiring provenance pins, CHR authoring prevents downstream mechanisms from silently inventing their own legality assumptions.

Separating core invariants into G.Core prevents drift and ensures Part‑G‑wide properties (tri‑state, penalty routing, set‑return semantics, RSCR typing, Default Governing Definition Index) cite G.Core as their governing definition, while CHR remains responsible for CHR‑specific kit surfaces.