feat: complete Phase 1 - vocabulary expansion & DriftProbe infrastructure

- CLI: nyx-probe scan with --summary/--delta/--full flags
- DriftProbe: training safety with Gini coefficient + Angular Drift
- Vocabulary: 54 terms (30 nimmerverse + 24 German philosophical)
- Sentinels: ANCHOR/BRIDGE/CANARY/TARGET monitoring system

Key findings:
- German philosophical terms: 37.5% depth≥2 hit rate (vs 3.3% nimmerverse)
- Super Cluster validated: heart cross-lang sim = 1.000
- Isolated Zone confirmed: being EN↔DE sim = 0.195
- Gini signature: Philosophy ~0.5 (diffuse), Technical ~0.8 (sparse)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

test_triangulation.py

@@ -0,0 +1,139 @@
+#!/usr/bin/env python3
+"""
+Test the Multilingual Triangulation Probe
+
+First test: "consciousness" concept
+- Ground: EN, ZH, AR
+- Deepen: DE (Bewusstsein)
+- Triangulate: back to EN
+"""
+import sys
+sys.path.insert(0, '.')
+
+from nyx_probing.core.model import NyxModel
+from nyx_probing.probes.multilingual_probe import (
+    MultilingualTriangulationProbe,
+    LANGUAGES,
+    LanguageZone,
+)
+
+print("=" * 70)
+print("🌙 MULTILINGUAL TRIANGULATION PROBE TEST")
+print("=" * 70)
+
+# Test concepts with translations
+CONCEPTS = {
+    "consciousness": {
+        "EN": "consciousness",
+        "DE": "Bewusstsein",
+        "ZH": "意识",
+        "AR": "الوعي",
+        "FR": "conscience",
+    },
+    "heart": {
+        "EN": "heart",
+        "DE": "Herz",
+        "ZH": "心",
+        "AR": "قلب",
+        "FR": "cœur",
+    },
+    "emergence": {
+        "EN": "emergence",
+        "DE": "Entstehung",
+        "ZH": "涌现",
+        "AR": "ظهور",
+        "FR": "émergence",
+    },
+    "being": {
+        "EN": "being",
+        "DE": "Sein",
+        "ZH": "存在",
+        "AR": "كينونة",
+        "FR": "être",
+    },
+}
+
+# Load model
+print("\n📦 Loading model...")
+model = NyxModel()
+model.load()
+
+# Create probe
+print("\n🔬 Creating triangulation probe...")
+probe = MultilingualTriangulationProbe(
+    model,
+    grounding_languages=["EN", "ZH", "AR"],
+    deepening_language="DE",
+    triangulation_target="EN",
+)
+
+# Test each concept
+print("\n" + "=" * 70)
+print("🧪 RUNNING TRIANGULATION TESTS")
+print("=" * 70)
+
+results = []
+for concept_name, translations in CONCEPTS.items():
+    print(f"\n{'─' * 70}")
+    print(f"Testing: {concept_name.upper()}")
+    print('─' * 70)
+    
+    try:
+        result = probe.probe(concept_name, translations)
+        results.append(result)
+        
+        # Print summary
+        print(probe.summary(result))
+        
+        # Print some details
+        print(f"\n  Deepening completion preview:")
+        print(f"  '{result.deepening.completion[:100]}...'")
+        
+        print(f"\n  Triangulation completion:")
+        print(f"  Prompt: '{result.triangulation.translation_prompt}'")
+        print(f"  Output: '{result.triangulation.model_completion[:100]}...'")
+        
+    except Exception as e:
+        print(f"  ERROR: {e}")
+        import traceback
+        traceback.print_exc()
+
+# Summary table
+print("\n" + "=" * 70)
+print("📊 SUMMARY TABLE")
+print("=" * 70)
+
+print(f"\n{'Concept':<15} | {'Grounding':<10} | {'Depth':<6} | {'Valley':<12} | {'Transfer':<10} | {'Recommendation'}")
+print("-" * 100)
+
+for r in results:
+    print(f"{r.concept:<15} | {r.grounding.average_convergence:.3f}     | {r.deepening.depth_score}/3    | {r.deepening.valley_type:<12} | {'✓' if r.depth_transferable else '✗':<10} | {r.curriculum_recommendation[:30]}")
+
+# Final analysis
+print("\n" + "=" * 70)
+print("🌙 CURRICULUM IMPLICATIONS")
+print("=" * 70)
+
+# Group by recommendation
+high_depth = [r for r in results if r.depth_accessible and r.depth_transferable]
+needs_work = [r for r in results if not r.depth_accessible]
+needs_bridge = [r for r in results if r.depth_accessible and not r.depth_transferable]
+
+if high_depth:
+    print(f"\n✅ READY FOR MULTILINGUAL CURRICULUM:")
+    for r in high_depth:
+        print(f"   - {r.concept}: {r.curriculum_recommendation}")
+
+if needs_bridge:
+    print(f"\n⚠️  NEEDS BRIDGING (depth accessible but not transferable):")
+    for r in needs_bridge:
+        print(f"   - {r.concept}: depth={r.deepening.depth_score} but transfer failed")
+
+if needs_work:
+    print(f"\n❌ NEEDS GROUNDING FIRST:")
+    for r in needs_work:
+        print(f"   - {r.concept}: depth only {r.deepening.depth_score}/3")
+
+print("\n" + "=" * 70)
+print("✅ TRIANGULATION PROBE TEST COMPLETE")
+print("=" * 70)