```plaintext
%% KubeRay Unified GPU Backend (ADR-0011)
%% C4 Component diagram showing RayService endpoints and GPU allocation

flowchart TB
    subgraph clients["🔌 Clients"]
        chat["Chat Handler"]
        voice["Voice Handler"]
    end

    subgraph rayservice["⚡ KubeRay RayService"]
        endpoint["ai-inference-serve-svc:8000"]
        
        subgraph deployments["Ray Serve Deployments"]
            direction TB
            
            subgraph strixhalo["🟢 khelben (Strix Halo 64GB)"]
                llm["/llm<br/>vLLM 70B<br/>0.95 GPU"]
            end

            subgraph rtx2070["🟡 elminster (RTX 2070 8GB)"]
                whisper["/whisper<br/>Whisper v3<br/>0.5 GPU"]
                tts["/tts<br/>XTTS<br/>0.5 GPU"]
            end

            subgraph radeon680m["🔴 drizzt (Radeon 680M 12GB)"]
                embeddings["/embeddings<br/>BGE-Large<br/>0.8 GPU"]
            end

            subgraph intelarc["🔵 danilo (Intel Arc)"]
                reranker["/reranker<br/>BGE-Reranker<br/>0.8 GPU"]
            end
        end
    end

    subgraph kserve["🎯 KServe Compatibility Layer"]
        direction TB
        svc1["whisper-predictor.ai-ml"]
        svc2["tts-predictor.ai-ml"]
        svc3["llm-predictor.ai-ml"]
        svc4["embeddings-predictor.ai-ml"]
        svc5["reranker-predictor.ai-ml"]
    end

    %% Client connections
    chat --> endpoint
    voice --> endpoint

    %% Path routing
    endpoint --> llm
    endpoint --> whisper
    endpoint --> tts
    endpoint --> embeddings
    endpoint --> reranker

    %% KServe aliases
    svc1 -->|"ExternalName"| endpoint
    svc2 -->|"ExternalName"| endpoint
    svc3 -->|"ExternalName"| endpoint
    svc4 -->|"ExternalName"| endpoint
    svc5 -->|"ExternalName"| endpoint

    classDef client fill:#3498db,color:white
    classDef endpoint fill:#9b59b6,color:white
    classDef amd fill:#ED1C24,color:white
    classDef nvidia fill:#76B900,color:white
    classDef intel fill:#0071C5,color:white
    classDef kserve fill:#f39c12,color:black

    class chat,voice client
    class endpoint endpoint
    class llm,embeddings amd
    class whisper,tts nvidia
    class reranker intel
    class svc1,svc2,svc3,svc4,svc5 kserve

```