Governance
Risk systems outrank decision systems
Meridian enforces hard limits, deterministic state changes, and audit-ready traces.

Risk controls
- • Exposure caps defined per regime and asset.
- • Invalidation thresholds set before signal release.
- • Signal filters enforce consensus before publish.
- • Degradation modes reduce exposure when uncertainty rises.
Auditability
- • Decision traces include what changed, why, and when.
- • Logs are time-ordered and human-readable.
- • Signal issuance is tied to regime state transitions.
- • Access is tiered and recorded on subscription change.

Operational posture
Systems are designed to operate unattended with guardrails that override automation. When uncertainty increases, exposure is reduced by policy.