Governance begins with custody. Codex Sovereign defines primitives that cannot be bypassed or optimized away.
- Refusal Rails — deterministic enforcement at the decision boundary; no action proceeds unless admissibility is satisfied.
- Admissibility Conditions — structural checks that resolve authority, safety, and verifiable completeness before execution.
- Custody Artifacts — tamper‑evident records that prove whether execution was permitted or refused.
- Survivability Signal — refusal is not advisory; it is structural, ensuring coexistence before drift becomes rupture.
Custody primitives are the foundation. They are non‑negotiable, replay‑verifiable, and authored for survivability.