G.0:10 - Rationale
CG‑Spec centralises frame-level comparability constraints so that:
- CHR authorship (G.3) remains about measurement meaning rather than implicit thresholds,
- CAL (G.4) governs context-local acceptance/threshold policies and proof ledgers,
- selectors and dispatchers (G.5) remain policy-governed and auditable rather than encoding hidden legality assumptions,
- refresh (G.11) can treat legality edits and pin changes as explicit causes with canonical trigger ids.