A.6.7:10 - Rationale
Characterization and admissibility-gated selection pipelines are unified by:
- shared governing spec refs (e.g., CN‑Spec / CG‑Spec),
- shared conditions for actual semantic, kind and plane relations, independently governed flow/gate crossings, and any penalties routed to
R_eff, - shared guard semantics (tri-state, no coercion),
- and explicit protocol constraints (allowed pipelines).
Encoding this unity as “one mechanism” or “one family” forces false commonality and invites hidden semantics. A dedicated suite descriptor preserves modularity and keeps the level separation clean.