{"service":"Nutrition Estimation Engine","version":"2.0.0","endpoints":{"POST /estimate-from-text":"Primary endpoint. Default: Layer 0 + L1→L2 (L3 off). Set NUTRITION_ENABLE_LAYER3=1 for L3; ESTIMATE_SIMPLE_LLM=1 for v1 LLM macros.","POST /estimate":"Structured input → Layer 0 → L1 → L2 (L3 optional).","GET /health":"Liveness check.","GET /ready":"Readiness check (startup complete?).","GET /docs":"Interactive API docs (Swagger UI)."}}