Squashed 'vendor/ruvector/' content from commit b64c2172

git-subtree-dir: vendor/ruvector
git-subtree-split: b64c21726f2bb37286d9ee36a7869fef60cc6900

docs/adr/coherence-engine/ADR-CE-006-compute-ladder.md

@@ -0,0 +1,37 @@
+# ADR-CE-006: Coherence Gate Controls Compute Ladder
+
+**Status**: Accepted
+**Date**: 2026-01-22
+**Parent**: ADR-014 Coherence Engine Architecture
+
+## Context
+
+Not all coherence violations require the same response. A minor transient spike differs from sustained structural breakdown. The system needs graduated responses.
+
+## Decision
+
+**Coherence gate controls explicit compute ladder: Reflex → Retrieval → Heavy → Human.**
+
+| Lane | Latency | Trigger | Action |
+|------|---------|---------|--------|
+| 0: Reflex | <1ms | E < θ_reflex | Proceed, local update |
+| 1: Retrieval | ~10ms | θ_reflex ≤ E < θ_retrieval | Fetch evidence, lightweight reasoning |
+| 2: Heavy | ~100ms | θ_retrieval ≤ E < θ_heavy | Multi-step planning, spectral analysis |
+| 3: Human | Async | E ≥ θ_heavy or persistent | Escalate to human, block action |
+
+## Consequences
+
+### Benefits
+- Most operations stay fast (Lane 0)
+- Graduated response matches severity
+- Human escalation for truly difficult cases
+- Every escalation has witness
+
+### Risks
+- Threshold tuning requires domain knowledge
+- Over-sensitive thresholds cause unnecessary escalation
+
+## References
+
+- ADR-014: Coherence Engine Architecture, Section 3
+- ADR-CE-014: Reflex Lane Default