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+# ADR-CE-009: Single Coherence Object
+
+**Status**: Accepted
+**Date**: 2026-01-22
+**Parent**: ADR-014 Coherence Engine Architecture
+
+## Context
+
+Building domain-specific coherence systems (one for AI, one for finance, one for medical) leads to:
+- Duplicated effort
+- Inconsistent semantics
+- Maintenance burden
+
+## Decision
+
+**Single coherence object - once math is fixed, everything is interpretation.**
+
+The Universal Coherence Object:
+- Nodes: d-dimensional state vectors
+- Edges: Restriction maps ρ_u, ρ_v
+- Energy: E(S) = Σ w_e|r_e|²
+- Gate: E < θ → allow
+
+Domain-specific interpretation:
+| Domain | Nodes | Edges | Residual | Gate |
+|--------|-------|-------|----------|------|
+| AI | Beliefs | Citations | Contradiction | Refusal |
+| Finance | Trades | Arbitrage | Regime mismatch | Throttle |
+| Medical | Vitals | Physiology | Clinical disagreement | Escalation |
+
+## Consequences
+
+### Benefits
+- One implementation, many applications
+- Proven math applies everywhere
+- Domain experts focus on interpretation, not implementation
+
+### Risks
+- Abstraction may not fit all domains perfectly
+- Requires mapping domain concepts to universal structure
+
+## References
+
+- ADR-014: Coherence Engine Architecture, "Universal Coherence Object"