This final bridge essay summarises what the NPF/CNI series has established (simulation‑level internal consistency) and what remains uncertain (field validation, cultural calibration). It introduces the conceptual architecture (FEN) as a proposal, articulates the covenant principles, and issues an open invitation to adversarial collaboration.

This paper aggregates validation status of the NPF/CNI framework. It distinguishes protocol validation (FEN, CDF, auto‑reject) from weight‑structure validation (simulation‑only, 77% confidence), states limitations upfront, and provides implementation guidance for researchers, policymakers, and AI safety. A forward‑looking research agenda outlines next steps: field trials, cross‑cultural calibration, neuroimaging, and intervention studies.