graph TD
            subgraph API_Plane [API Plane]
                APIServer[API Server]
            end

            subgraph Control_Plane [Control Plane]
                Router[KV-aware Router]
                Planner[SLO Planner]
            end

            subgraph Data_Plane [Data Plane]
                KVBM[KV Block Manager]
                Engine1[Inference Engine TRT-LLM]
                Engine2[Inference Engine vLLM]
                NIXL[NIXL Comm Library]
            end

            APIServer --> Router
            Router --> Planner
            Router --> KVBM
            Router --> Engine1
            Router --> Engine2
            Engine1 <--> NIXL
            Engine2 <--> NIXL

graph TD
            subgraph Runtimes [Inference Runtimes Layer]
                vLLM[vLLM / SGLang]
                TRTLLM[TensorRT-LLM]
            end

            subgraph KVBM_Stack [KV Block Manager Stack]
                Connectors[Runtime Connectors]
                Adapter[KVBM Adapter]
                Core[Core Memory Manager Logic]
                Policy[Allocation & Eviction Policies]
            end

            subgraph Memory_Tiers [Memory & Storage Tiers]
                GPU_HBM[GPU HBM - G1]
                CPU_DRAM[CPU DRAM - G2]
                Local_SSD[Local SSD - G3]
                Remote_Storage[Remote Storage - G4]
            end

            Runtimes --> Connectors
            Connectors --> Adapter
            Adapter --> Core
            Core <--> Policy
            Core <--> Memory_Tiers
            
            style KVBM_Stack fill:#f9f,stroke:#333,stroke-width:2px;