{
  "architecture_model": "Clean Architecture / Hexagonal Ports & Adapters",
  "evaluated_at": "2026-10-04T02:15:00Z",
  "layers": [
    {
      "layer": "Domain",
      "purpose": "Enterprise business entities, cryptographic primitives, pure validation rules, and mathematical invariants.",
      "directories": [
        "backend/app/domain"
      ],
      "major_modules": [
        "app.domain.entities",
        "app.domain.enums",
        "app.domain.data_validator",
        "app.domain.realtime_explainer",
        "app.domain.secagg_crypto",
        "app.domain.differential_privacy",
        "app.domain.byzantine"
      ],
      "allowed_inward_dependencies": [],
      "observed_dependencies": [
        "Standard Python library, typing, math, pydantic (schemas only)"
      ],
      "violations_detected": 0,
      "violations_remediated": [
        "ENG-0002 decoupled static httpx and concrete Redis client imports from app.domain.realtime_explainer"
      ]
    },
    {
      "layer": "Application",
      "purpose": "Use case orchestration, federated learning simulation management, alert handling, case investigation workflows.",
      "directories": [
        "backend/app/application"
      ],
      "major_modules": [
        "app.application.services.multi_bank_simulator",
        "app.application.services.coordinator_service",
        "app.application.services.alert_service",
        "app.application.services.case_service",
        "app.application.services.entity_service",
        "app.application.services.explainability_service",
        "app.application.services.model_registry",
        "app.application.schemas"
      ],
      "allowed_inward_dependencies": [
        "Domain"
      ],
      "observed_dependencies": [
        "Domain entities, domain services, infrastructure interfaces"
      ],
      "violations_detected": 0
    },
    {
      "layer": "Infrastructure",
      "purpose": "Concrete database drivers, cache adapters, Kafka producers/consumers, TEE hardware drivers, MinIO storage, zero-trust PKI.",
      "directories": [
        "backend/app/infrastructure"
      ],
      "major_modules": [
        "app.infrastructure.database",
        "app.infrastructure.redis_store",
        "app.infrastructure.cache",
        "app.infrastructure.streaming.kafka_producer",
        "app.infrastructure.security.tee_driver",
        "app.infrastructure.security.pki_service",
        "app.infrastructure.connectors"
      ],
      "allowed_inward_dependencies": [
        "Domain",
        "Application (Ports)"
      ],
      "observed_dependencies": [
        "SQLAlchemy, redis, aioredis, confluent-kafka, cryptography, torch, numpy"
      ],
      "violations_detected": 0
    },
    {
      "layer": "Presentation / API",
      "purpose": "FastAPI HTTP REST routers, WebSocket streaming handlers, request parsing, authentication middlewares.",
      "directories": [
        "backend/app/presentation"
      ],
      "major_modules": [
        "app.presentation.routers.simulation",
        "app.presentation.routers.alerts",
        "app.presentation.routers.cases",
        "app.presentation.routers.health",
        "app.presentation.routers.coordinator",
        "app.presentation.routers.security",
        "app.presentation.websockets.manager",
        "app.presentation.websockets.streaming_ws"
      ],
      "allowed_inward_dependencies": [
        "Application",
        "Domain",
        "Infrastructure (via Dependency Injection)"
      ],
      "observed_dependencies": [
        "FastAPI, Starlette, application services, infrastructure stores"
      ],
      "violations_detected": 0
    },
    {
      "layer": "Frontend Presentation",
      "purpose": "React 19 Single Page Application, TanStack Query data caching, Tailwind CSS design system, Lucide icons, Recharts visualization.",
      "directories": [
        "frontend/src"
      ],
      "major_modules": [
        "frontend/src/pages",
        "frontend/src/components",
        "frontend/src/api",
        "frontend/src/hooks",
        "frontend/src/types"
      ],
      "allowed_inward_dependencies": [
        "Backend HTTP API & WebSocket endpoints"
      ],
      "observed_dependencies": [
        "React, TanStack Query, Lucide-React, Recharts, Vite"
      ],
      "violations_detected": 0
    }
  ],
  "runtime_state_owners": {
    "simulation_results": {
      "owner": "app.infrastructure.redis_store.RedisStore('sim_results')",
      "concurrency_mechanism": "threading.RLock() synchronized dictionary in-memory; atomic SET/GET in Redis",
      "persistence_mode": "Durable when Redis configured; ephemeral in-memory fallback when offline"
    },
    "simulation_events": {
      "owner": "app.infrastructure.redis_store.RedisStore('sim_events')",
      "concurrency_mechanism": "threading.RLock() synchronized push/get list operations",
      "persistence_mode": "Durable lists in Redis; in-memory lists in fallback"
    },
    "simulation_stop_events": {
      "owner": "app.presentation.routers.simulation._stop_events",
      "concurrency_mechanism": "threading.Lock() protected dictionary of threading.Event instances with bounded LRU eviction",
      "persistence_mode": "Process-local lifecycle management"
    },
    "case_and_alert_entities": {
      "owner": "app.infrastructure.database (AsyncSession SQL + in-memory store fallback)",
      "concurrency_mechanism": "Database transactions / RLock synchronized memory store",
      "persistence_mode": "PostgreSQL 16 relational durability / SQLite central DB"
    }
  },
  "infrastructure_adapters": {
    "cache_and_broker": "Redis 7.2 (with auto-detect and in-process event bus fallback)",
    "relational_storage": "PostgreSQL 16 / SQLite central database",
    "event_streaming": "Apache Kafka 3.7 CloudEvents 1.0 (with in-memory queue fallback)",
    "security_enclave": "Intel SGX / AWS Nitro Enclaves (with software emulation sandbox fallback)",
    "key_management": "HashiCorp Vault / SoftHSM PKCS#11 (with local cryptographic derivation fallback)"
  }
}