%% Cluster Node Topology
%% Related: ADR-0035, ADR-0011, ADR-0037

flowchart TB
    subgraph Cluster["Homelab Kubernetes Cluster (14 nodes)"]
        subgraph ControlPlane["👑 Control Plane (Companions of the Hall)"]
            Bruenor["bruenor<br/>Intel N100"]
            Catti["catti<br/>Intel N100"]
            Storm["storm<br/>Intel N100"]
        end

        subgraph GPUNodes["🧙 Wizards (GPU Workers)"]
            Khelben["khelben<br/>Radeon 8060S 64GB<br/>🎮 Primary AI"]
            Elminster["elminster<br/>RTX 2070 8GB<br/>🎮 CUDA"]
            Drizzt["drizzt<br/>Radeon 680M<br/>🎮 ROCm"]
            Danilo["danilo<br/>Intel Arc A770<br/>🎮 Intel"]
            Regis["regis<br/>NVIDIA GPU<br/>🎮 CUDA"]
        end

        subgraph CPUNodes["⚔️ Fighters (CPU Workers)"]
            Wulfgar["wulfgar<br/>Intel x86_64"]
        end

        subgraph ARMWorkers["🗡️ Rogues (ARM64 Raspberry Pi)"]
            Durnan["durnan<br/>Pi 4 8GB"]
            Elaith["elaith<br/>Pi 4 8GB"]
            Jarlaxle["jarlaxle<br/>Pi 4 8GB"]
            Mirt["mirt<br/>Pi 4 8GB"]
            Volo["volo<br/>Pi 4 8GB"]
        end
    end

    subgraph Workloads["Workload Placement"]
        AIInference["AI Inference<br/>→ Khelben"]
        MLTraining["ML Training<br/>→ GPU Nodes"]
        EdgeServices["Lightweight Services<br/>→ ARM64"]
        General["General Workloads<br/>→ CPU + ARM64"]
    end

    subgraph Storage["Storage Affinity"]
        Longhorn["Longhorn<br/>x86_64 only"]
        NFS["NFS<br/>All nodes"]
    end

    AIInference -.-> Khelben
    MLTraining -.-> GPUNodes
    EdgeServices -.-> ARMWorkers
    General -.-> CPUNodes
    General -.-> ARMWorkers

    Longhorn -.->|Excluded| ARMWorkers
    NFS --> Cluster

    classDef control fill:#2563eb,stroke:#1d4ed8,color:#fff
    classDef gpu fill:#7c3aed,stroke:#5b21b6,color:#fff
    classDef cpu fill:#dc2626,stroke:#b91c1c,color:#fff
    classDef arm fill:#059669,stroke:#047857,color:#fff
    classDef workload fill:#9f7aea,stroke:#805ad5,color:#fff
    classDef storage fill:#ed8936,stroke:#dd6b20,color:#fff

    class Bruenor,Catti,Storm control
    class Khelben,Elminster,Drizzt,Danilo,Regis gpu
    class Wulfgar cpu
    class Durnan,Elaith,Jarlaxle,Mirt,Volo arm
    class AIInference,MLTraining,EdgeServices,General workload
    class Longhorn,NFS storage