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vendor/ruvector/docs/adr/coherence-engine/ADR-CE-014-reflex-lane-default.md

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+# ADR-CE-014: Reflex Lane Default
+
+**Status**: Accepted
+**Date**: 2026-01-22
+**Parent**: ADR-014 Coherence Engine Architecture
+
+## Context
+
+A coherence system that escalates too often becomes:
+- Slow (every operation waits for heavy compute)
+- Noisy (constant human escalations)
+- Ignored (users bypass the system)
+
+## Decision
+
+**Reflex lane default - most updates stay low-latency, escalation only on sustained incoherence.**
+
+Design principles:
+1. **Default to Lane 0**: Most operations complete in <1ms
+2. **Transient spikes tolerated**: Brief energy increases don't escalate
+3. **Persistence triggers escalation**: Only sustained/growing incoherence moves up lanes
+4. **Human lane is last resort**: Lane 3 only when automated systems cannot resolve
+
+Persistence detection:
+```rust
+fn is_escalation_needed(history: &EnergyHistory, window: Duration) -> bool {
+    history.is_above_threshold(threshold, window) ||
+    history.is_trending_up(window)
+}
+```
+
+## Consequences
+
+### Benefits
+- System stays responsive under normal operation
+- Escalation is meaningful (not noise)
+- Users trust the system (it's not crying wolf)
+
+### Risks
+- Might miss real problems that appear transient
+- Persistence window requires tuning
+
+## References
+
+- ADR-014: Coherence Engine Architecture, Section 3
+- ADR-CE-006: Compute Ladder