[claude] Implement three-tier metabolic LLM router (#966) (#1160)

Co-authored-by: Claude (Opus 4.6) <claude@hermes.local>
Co-committed-by: Claude (Opus 4.6) <claude@hermes.local>

src/infrastructure/router/__init__.py

@@ -3,6 +3,14 @@
 from .api import router
 from .cascade import CascadeRouter, Provider, ProviderStatus, get_router
 from .history import HealthHistoryStore, get_history_store
+from .metabolic import (
+    DEFAULT_TIER_MODELS,
+    MetabolicRouter,
+    ModelTier,
+    build_prompt,
+    classify_complexity,
+    get_metabolic_router,
+)
 
 __all__ = [
     "CascadeRouter",
@@ -12,4 +20,11 @@ __all__ = [
     "router",
     "HealthHistoryStore",
     "get_history_store",
+    # Metabolic router
+    "MetabolicRouter",
+    "ModelTier",
+    "DEFAULT_TIER_MODELS",
+    "classify_complexity",
+    "build_prompt",
+    "get_metabolic_router",
 ]