flowchart LR
    A[run.py] --> B[FastAPI app in app/main.py]

    subgraph Runtime[Startup and background runtime]
        direction TB
        C[Startup model preload]
        D[Outbox worker thread]
        E[Event consumer thread]
    end

    subgraph Routes[API surface]
        direction TB
        F[Pipeline routes]
        G[Strategy routes]
        H[Graph routes]
        I[Persona routes]
        J[Simulation routes]
        K[MOHP routes]
        L[Analytics routes]
        M[Stats and admin routes]
    end

    subgraph Services[Core services]
        direction TB
        N[Redis outbox]
        O[Redis Streams or RabbitMQ]
        P[Neo4j ingestion]
        Q[Campaign vectorizer]
        R[GMM clustering]
        S[Heatmap scoring]
        T[RAG optimizer]
        U[Neo4j graph queries]
        V[Redis session storage]
        W[Ollama responses]
        X[D-ID WebRTC stream]
        Y[Hume prosody]
        Z[Rule-based or LLM objection analysis]
        AA[ChromaDB campaign memory]
    end

    B --> Runtime
    B --> Routes

    D --> N --> O
    E --> P

    F --> N
    G --> Q
    G --> R
    G --> S
    G --> T --> AA

    H --> U
    I --> U

    J --> V
    J --> W
    J --> X
    J --> Y

    K --> Z
    L --> V