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Agentic AI Platform Architecture

Overview

The Agentic AI Platform is a unified platform that enables autonomous AI agents to perform complex tasks. It is designed to address challenges encountered when building GenAI services: accelerated compute operations, model serving complexity, lack of framework integration, autoscaling difficulties, absence of MLOps automation, and cost optimization. The platform organizes accelerated compute infrastructure, model serving, data/knowledge/memory, agent orchestration, intelligent inference routing, and multi-channel exposure into 6 runtime layers stacked along the request path, and separates observability & evaluation, governance/safety/sovereignty, and model lifecycle (FMOps) into 3 cross-cutting planes that span all layers. For detailed analysis of each challenge, see the Technical Challenges document.

Target Audience

This document is intended for solution architects, platform engineers, and DevOps engineers. A basic understanding of Kubernetes and AI/ML workloads is required.


Separating Layers from Planes

Earlier layer models placed concerns such as evaluation, drift detection, and feedback across multiple layers, blurring responsibility boundaries. This architecture clearly distinguishes two kinds of building blocks.

  • Runtime Layer: Six layers stacked bottom-up along the path a user request travels. Requests flow top-down (Layer 6 → Layer 1), and the platform is built bottom-up (Layer 1 → Layer 6).
  • Cross-cutting Plane: Three concerns that do not belong to any single layer but span all layers vertically. Observability & evaluation, governance/safety/sovereignty, and model lifecycle fall into this category.
Why separate into planes

Quality evaluation (RAGAS), drift detection, feedback collection, and Guardrails are not functions of a single layer but concerns that operate across all layers. Placing them as separate layers causes the same function to be described redundantly in multiple layers, dispersing responsibility. Separating them into planes makes "where inference happens (layer)" and "how it is observed, controlled, and improved (plane)" orthogonal. This distinction takes the same approach as Chip Huyen's AI Engineering (2025) 3-tier (Infrastructure / Model / Application) model, the FTI (Feature–Training–Inference) pipeline pattern, and the cross-cutting operational perspective of the AWS Well-Architected Generative AI Lens.


Overall System Architecture

The Agentic AI Platform consists of 6 runtime layers and 3 cross-cutting planes that span them. Each layer has clear responsibilities and enables independent scaling and operation through loose coupling.

Core Design Principles:

  • Orthogonal separation of layers and planes: Separate "where inference happens (6 layers)" from "how it is observed, controlled, and improved (3 planes)" to eliminate concern duplication
  • AI Infrastructure as a first-class layer: Make accelerated compute (GPU·Trainium·Inferentia) and its orchestration, monitoring, and performance optimization an explicit bottom-most layer (Layer 1)
  • Self-hosted + External AI Hybrid: Unified management of self-hosted models and external AI Provider APIs through the same gateway (Layer 5)
  • 2-Tier Cost Tracking: Dual tracking at infrastructure level (accelerator hours · model unit price × tokens) and application level (per-agent-step costs)
  • MCP/A2A Standard Protocols: Standardized communication between agents and tools (MCP) and between agents (A2A) for interoperability
  • Closed-loop FMOps: A closed loop where production feedback triggers retraining and new models must pass an evaluation gate before deployment (model lifecycle plane)
  • Sovereignty-aware: Meet data sovereignty requirements through SCP region enforcement, in-country regions, and hybrid/on-premises self-hosting (governance plane)

Layer & Plane Roles

Runtime Layers (6) — Request Path
Layer
Role
Key Components
Layer 6: Experience & Channels
User/system entry points, multi-channel exposure
API · gRPC, Agent SDK, Web UI, Channel Connectors
Layer 5: Gateway & Routing
Auth, intelligent inference routing, cost guardrails
2-Tier Gateway, Cascade Router, KV Cache-aware Routing, Rate Limit
Layer 4: Agent Runtime & Orchestration
Agent loops, memory, tool & multi-agent collaboration
Agent Runtime, Tool Registry (MCP), A2A, State Store
Layer 3: Data, Knowledge & Memory
RAG retrieval, knowledge graph, session/long-term memory
Vector DB, Knowledge/Feature Store, Cache, Object Storage
Layer 2: Model Serving & Inference
LLM/non-LLM inference engines, distributed serving, model registry
vLLM, llm-d, Triton, Model Registry
Layer 1: AI Infrastructure
Accelerated compute, GPU orchestration, monitoring & perf optimization
GPU · Trainium · Inferentia, Karpenter · Kueue · DRA, MIG, DCGM · Neuron Monitor, EFA
Cross-cutting Planes (3) — Span All Layers
Plane
Role
Key Components
Observability & Evaluation
Tracing, metrics, cost tracking, quality eval, drift detection
Langfuse, OpenTelemetry, RAGAS, Cost Tracking, Drift Detection
Governance, Safety & Sovereignty
Guardrails, policy/RBAC, compliance, data sovereignty & region enforcement
NeMo Guardrails, OIDC/RBAC, SCP Region Enforcement, ISMS-P · SOC2
Model Lifecycle (FMOps)
Training/fine-tuning, eval gates, continuous training, feedback loop
Training Pipeline, CT Scheduler, Eval Harness, Feedback Loop

Mapping from the Former 8-Layer Model

The previous version used 8 layers, but evaluation, drift, feedback, and Guardrails were duplicated across multiple layers. The model has been reorganized into 6 layers + 3 planes as follows.

Former (8-layer)Current (6 layers + 3 planes)
Layer 1: Client & FeedbackLayer 6: Experience & Channels (Feedback → lifecycle plane)
Layer 2: Gateway & GovernanceLayer 5: Gateway & Routing (Governance → governance plane)
Layer 3: Agent & OrchestrationLayer 4: Agent Runtime & Orchestration
Layer 4: Model Serving & LifecycleLayer 2: Model Serving (Lifecycle → lifecycle plane)
Layer 5: Data & FeatureLayer 3: Data, Knowledge & Memory
Layer 6: Observability & InsightsObservability & Evaluation plane
Layer 7: Training & FeedbackModel Lifecycle plane
Layer 8: Evaluation & QualityObservability & Evaluation plane + Governance plane (Guardrails)
(none)Layer 1: AI Infrastructure (new)

Core Components: Runtime Layers

The six layers are described in reverse request order (bottom-most infrastructure → top-most experience). The platform is built up from Layer 1. The request flow descends Layer 6 (entry) → Layer 5 (gateway) → Layer 4 (Agent); when the Agent needs inference, it goes back through the Layer 5 gateway to call Layer 2 (model serving), which runs on the Layer 1 accelerated compute.

Layer 1: AI Infrastructure

The bottom-most layer responsible for accelerated compute resources and their operation. Accelerators such as GPU·Trainium·Inferentia are the most expensive resources in Agentic AI, so beyond simple provisioning, orchestration, monitoring, and performance optimization must be integrated into a single layer. This layer operates as a combination of many components and provides a stable accelerated-compute abstraction to the layer above (Layer 2, model serving).

Functional AreaResponsibilityKey Components
Accelerated ComputeProvide accelerators for LLM/non-LLM inference and trainingNVIDIA GPU, AWS Trainium2/Inferentia2
Node OrchestrationWorkload-driven dynamic node provisioning, Spot usageKarpenter, Cluster Autoscaler
Job SchedulingGPU job queuing, per-team quota, fair sharingKueue, KAI Scheduler
GPU PartitioningFine-grained partitioning of a single GPU across workloadsDRA, MIG, Time-Slicing
Accelerator MonitoringReal-time tracking of utilization, temperature, memory, powerDCGM Exporter, Neuron Monitor
Performance OptimizationTopology-aware placement, high-speed networkingNVLink/NVSwitch-aware scheduling, EFA

Why a separate layer:

The operation of accelerated compute is separated in responsibility from model serving (Layer 2). Model serving owns "which model is served and how"; AI Infrastructure owns "on which accelerator that inference runs and how efficiently." GPU monitoring, scheduling, and partitioning evolve independently of serving engines such as vLLM and llm-d, and training workloads (lifecycle plane) share the same infrastructure layer.

Detailed Guides

For GPU node strategy, Karpenter·KEDA·DRA resource management, the NVIDIA GPU stack (GPU Operator·DCGM·MIG), and the AWS Neuron stack, see the GPU infrastructure section of Model Serving & Inference Infrastructure.


Layer 2: Model Serving & Inference

The layer responsible for inference of self-hosted models and non-LLM models. It runs on the accelerated compute provided by Layer 1 and processes inference requests routed from the Layer 5 gateway.

Self-hosted LLM Serving

Operates high-performance LLM serving engines supporting PagedAttention, KV Cache optimization, and distributed inference. Open-source inference engines such as vLLM and llm-d are autoscaled on Kubernetes.

Non-LLM Serving

Non-LLM models such as embedding, reranking, and STT (Whisper) are served separately via Triton Inference Server and similar. The RAG pipeline (Layer 3) and agents (Layer 4) call these.

Model Registry

Centrally manages versions, metadata, and performance metrics of all deployed models. The training pipeline in the model lifecycle plane registers new models, and only models that pass the evaluation gate are served through this registry.

s3://model-registry/
├── llama-3-70b/
│ ├── v1.0.0/
│ │ ├── model.safetensors
│ │ ├── metadata.json
│ │ └── evaluation_metrics.json
│ ├── v1.1.0/
│ └── v1.2.0/ (current production)
└── mistral-7b/
Detailed Guides

For vLLM model serving, llm-d distributed inference (KV Cache-aware routing), MoE serving, and the NeMo training framework, see Model Serving & Inference Infrastructure. Model transformations such as fine-tuning and distillation are covered in Model Lifecycle.


Layer 3: Data, Knowledge & Memory

The layer that provides the data, knowledge, and memory used by agents and the RAG pipeline.

Vector DB (RAG Store)

Converts documents into embedding vectors for storage and provides relevant context via similarity search upon agent requests.

Design Considerations:

  • Multi-tenant isolation: Data separation per tenant using Partition Keys
  • Index strategy: High-performance Approximate Nearest Neighbor search with HNSW index
  • Hybrid search: Improved search quality by combining Dense Vector + Sparse Vector (BM25)

Knowledge / Feature Store

Manages input features and domain knowledge used for ML model training and inference. It guarantees identical feature definitions at training and inference time to prevent training-serving skew; combining ontology and knowledge graphs reduces RAG hallucination and enables provenance tracking.

Online Store (Redis/DynamoDB)
└─ Low-latency feature lookup (< 10ms) · for real-time inference

Offline Store (S3 Parquet)
└─ Large-scale feature storage · for batch training

Cache · State · Object Storage

Stores session state, short-term memory, and LangGraph checkpointer state. Supports checkpointing and recovery for long-running agent tasks.

Detailed Guides

For the 3-plane design of the ontology-based Knowledge Feature Store, see Knowledge Feature Store; for Milvus vector DB operations, see Milvus Vector DB.


Layer 4: Agent Runtime & Orchestration

The layer where AI agents execute. Each agent runs as an independent container, with its lifecycle managed by a workflow engine.

FeatureDescription
State ManagementMaintains conversation context and task state, checkpointing
Tool ExecutionAsynchronous execution of registered tools via MCP protocol
Memory ManagementCombines short-term memory (session) with long-term memory (vector DB)
Inter-Agent CommunicationMulti-agent collaboration via A2A protocol
Error RecoveryAutomatic retry and fallback for failed tasks

Tool Registry

Centrally manages tools available to agents in a declarative manner. Each tool is exposed as an MCP server, allowing agents to invoke them via the standard protocol.

Tool TypePurposeExample
API ToolsExternal REST/gRPC service callsCRM lookup, order processing
Search ToolsVector DB search, document searchRAG context augmentation
Code ExecutionCode execution in sandbox environmentsData analysis, calculations
A2A ToolsDelegating tasks to other agentsSpecialist agent collaboration
Detailed Guides

For Kagent-based Kubernetes agent management, see Kagent; for AWS Native AgentCore-based agent operations, see AWS Native Platform.


Layer 5: Gateway & Routing

The layer that intelligently routes model inference requests. It unifies self-hosted models (Layer 2) and external AI providers into a single endpoint.

Routing Strategies:

StrategyDescription
Model-based routingDistributes to appropriate model backends based on request headers/parameters
KV Cache-aware routingMinimizes TTFT by considering LLM Prefix Cache state
Cascade routingTries low-cost model first → automatically switches to high-performance model on failure
Weight-based routingTraffic ratio splitting for Canary/Blue-Green deployments
FallbackAutomatic failover to alternative provider on outage (Circuit Breaker)

Cost Guardrails

Sets cost limits per request, per agent, and per tenant. On exceeding the monthly budget, automatically falls back to a low-cost model or sends alerts to prevent cost spikes. (Policy enforcement itself integrates with the governance plane.)

Detailed Guides

For the 2-Tier Gateway architecture (kgateway + Bifrost), Cascade Routing tuning, and Semantic Router, see Inference Gateway.


Layer 6: Experience & Channels

The top-most layer where users and external systems enter the platform. It exposes agent capabilities through various channels (API, SDK, Web UI, messenger/contact channels).

Entry PointDescriptionUse
API · gRPCREST/gRPC endpointsSystem integration, backend calls
Agent SDKPython/JS client SDKApplication-embedded agents
Web UIDashboard/chat interfaceDirect operator/user interaction
ChannelsMessenger, contact center (AICC), voice channelsOmni-channel customer touchpoints

Feedback collection (user ratings, corrections) begins at this layer, but the processing of collected data and its reflection into training is owned by the model lifecycle plane.


Core Components: Cross-cutting Planes

The following 3 planes do not belong to any single layer but span the 6 runtime layers vertically.

Observability & Evaluation Plane

Centrally collects and evaluates traces, metrics, costs, and quality arising across all layers.

LLM Tracing

Records the input, output, latency, and token usage of all LLM calls. Detailed traces for debugging are kept in development, sampled traces in production. Based on Langfuse and OpenTelemetry, it traces the full flow from Layer 4 (Agent) to Layer 2 (Serving).

2-Tier Cost Tracking

  • Infrastructure level: Layer 1 accelerator hours, model unit price × tokens
  • Application level: Per-agent-step cost, per-tenant/per-model budget tracking

Quality Evaluation (RAGAS)

Quantitatively measures RAG/Agent quality. Rather than a single layer, it comprehensively evaluates quality spanning data (Layer 3), serving (Layer 2), and Agent (Layer 4).

RAGAS Metrics:

  • Context Precision / Context Recall: retrieval accuracy and recall
  • Faithfulness: the degree to which the generated answer is grounded in context
  • Answer Relevancy: relevance between question and answer

Agent Success Rate:

  • Task Completion Rate, Tool Execution Accuracy, Multi-step Coherence

Drift Detection

Detects input data distribution change (data drift) and output quality degradation (concept drift). Uses thresholds such as PSI > 0.25 and KL Divergence > 0.1, and on exceeding them triggers retraining in the model lifecycle plane.

Detailed Guides

For Langfuse-based agent monitoring, see Agent Monitoring; for an LLMOps tool comparison, see LLMOps Observability; for RAG evaluation, see Ragas Evaluation.


Governance, Safety & Sovereignty Plane

Enforces safety, policy, regulatory compliance, and data sovereignty across the platform.

Guardrails Enforcement

Validates LLM input/output with NeMo Guardrails or Guardrails AI:

  • PII Leakage Detection
  • Prompt Injection Detection
  • Toxic Content Filtering
  • Factuality Check

Guardrails apply simultaneously at Layer 5 (gateway entry) and Layer 4 (agent output), so they are defined as a plane rather than a single layer.

Policy · Access Control (RBAC)

Enforces OIDC/JWT authentication, role-based access control, per-tool invocation permission limits, and tenant isolation. Callable tools per agent are declaratively defined under the principle of least privilege.

Data Sovereignty · Region Enforcement

Organizations with data sovereignty requirements (finance, public sector, regulated industries) must confine inference, training, and data storage within specific geographic boundaries. This platform meets sovereignty through the following means.

MeansDescriptionApplied At
SCP Region EnforcementDeny APIs in unapproved regions via AWS Organizations SCPAccount/OU boundary
Bedrock Geographic CRISKeep inference within a geographic boundary via Geographic cross-Region inferenceLayer 5 → External AI
In-country Self-hostingSelf-host models in an in-country region or on-premisesLayer 1·2
HybridCombine on-premises/in-country + cloud via EKS Hybrid NodesLayer 1
Detailed Guides

For SCP region enforcement policies, Bedrock Geographic cross-Region inference, and EKS Hybrid Nodes-based hybrid/sovereign deployment patterns, see Sovereign & Hybrid Deployment and the AI Platform Selection Guide. For the Guardrails technology stack, see AI Gateway Guardrails; for compliance mapping (SOC2·ISMS-P), see Compliance Framework.


Model Lifecycle (FMOps) Plane

Owns the closed loop that continuously improves models based on production feedback. Training, fine-tuning, evaluation, retraining, and feedback all belong to this plane, and the output (new models) is delivered to the Layer 2 Model Registry.

Training Pipeline Orchestration

Automates training workflows with Kubeflow Pipelines or Argo Workflows. Defines data validation → preprocessing → training → evaluation → registration stages as a DAG. Training workloads share the accelerated compute of Layer 1 AI Infrastructure.

Continuous Training (CT) Scheduler

Automatically runs retraining on drift detection (observability plane). Supports schedule-based (Cron) or event-based (drift threshold exceeded) triggers.

Trigger conditions:

  • Schedule-based: 0 0 * * 0 (every Sunday)
  • Drift-based: PSI > 0.25 or KL Divergence > 0.1
  • Quality degradation: Agent Success Rate < 85% sustained for 7 days

Evaluation Gate

A gate that validates model quality before deployment. Automatically measures Accuracy, RAGAS metrics, and Guardrails pass rate, blocking deployment if quality thresholds are not met. New models are canary-deployed at 10%, then regression is judged via a statistical test (Mann-Whitney U test, p < 0.05), with automatic rollback on regression.

Feedback Loop

Recycles production feedback (user ratings, corrections, A/B test results) into training data.

Positive Feedback (thumbs up)
→ Add to training dataset as positive example

Negative Feedback (thumbs down)
→ If user provides correction: add as hard negative
→ If no correction: filter from training dataset
Detailed Guides

For the MLOps pipeline (EKS), continuous training (GRPO/DPO), trace-to-dataset, and evaluation/rollout, see Model Lifecycle.


Layer & Plane Integration Flows

Shows how runtime layers and cross-cutting planes interact to form a complete FMOps pipeline. All three flows reveal a structure where planes span layers.

Feedback → Training → Serving Loop

The full loop where production feedback triggers retraining and a new model is deployed. The lifecycle plane and observability plane span the runtime layers.

Flow description:

  1. Layer 4 (Agent Runtime) collects user feedback and forwards it to the lifecycle plane's Feedback Loop
  2. The observability plane's Drift Detection detects input data drift
  3. The lifecycle plane's CT Scheduler receives the retraining trigger and runs the Training Pipeline (using Layer 1 accelerated compute)
  4. On passing the evaluation gate, the new model is registered in the Layer 2 Model Registry
  5. The Layer 5 Gateway validates the new model with a 10% canary deployment
  6. On regression detection, automatic rollback to the previous version in the Model Registry

Evaluation → Rollback Path

The path that detects quality regression and automatically rolls back. The observability plane detects and the lifecycle plane responds.

Flow description:

  1. The observability plane detects a RAGAS score drop
  2. The lifecycle plane's Eval Gate runs a Mann-Whitney U test for statistical significance
  3. On p-value < 0.05, the Alert System executes the rollback policy
  4. The Layer 2 Model Registry retrieves the last stable version
  5. The Layer 5 Gateway performs an atomic model swap within 5 minutes
  6. Production recovery complete

A/B Testing → Production

The path that experiments with two Agent/Model variants and deploys the winner to production.

Flow description:

  1. Layer 4 (Agent Runtime) runs the two A/B variants
  2. Layer 5 (Gateway) splits requests 50:50
  3. The observability plane's Experiment Tracking collects per-variant metrics (n = 1000+)
  4. The observability plane's Statistical Analysis runs a Mann-Whitney U test
  5. On p < 0.05 AND average metric improvement > 5%, the winner is selected
  6. The lifecycle plane marks the winner variant as production in the Layer 2 Model Registry
  7. Layer 5 (Gateway) routes 100% of traffic to the winner

Deployment Architecture

Namespace Structure

Namespaces are separated by function for separation of concerns and security.

NamespaceLayer / PlaneComponentsPod SecurityGPU
ai-infraLayer 1GPU Operator, Karpenter, Kueue, DCGM ExporterprivilegedRequired
ai-inferenceLayer 2LLM Serving Engine, Triton, Model RegistryprivilegedRequired
ai-dataLayer 3Vector DB, Cache, Knowledge/Feature Storebaseline-
ai-agentsLayer 4Agent Runtime, Tool Registry, A2Abaseline-
ai-gatewayLayer 5Inference Gateway, Auth, A/B Routerrestricted-
observabilityObservability planeTracing, Metrics, RAGAS, Drift Detectionbaseline-
ai-governanceGovernance planeGuardrails, Policy, Regression Detectionbaseline-
ai-trainingLifecycle planeTraining Pipeline, CT Scheduler, Eval GateprivilegedRequired

Layer 6 (Experience & Channels) is exposed via the Ingress/ALB in front of ai-gateway and external channel connectors, without a dedicated namespace.


Scalability Design

Horizontal Scaling Strategy

Each component can be horizontally scaled independently.

ComponentLayerScaling TriggerMethod
GPU NodesLayer 1Pending Pods, GPU request volumeKarpenter Node Auto-provisioning
LLM ServingLayer 2GPU utilization, queue depthHPA + KEDA
Vector DBLayer 3Query latency, index sizeIndependent Query/Index Node scaling
Agent PodLayer 4Message queue length, active session countEvent-driven Autoscaling (KEDA)
GatewayLayer 5Request count, concurrent connectionsHPA
Training PipelineLifecycle planeTraining job queue lengthSpot Instance Auto-provisioning

Multi-Tenant Support

Supports multi-tenancy through a combination of namespace isolation, resource quotas, and network policies, enabling multiple teams or projects to share the same platform.

Tenant Isolation Strategy
📦
Namespace
General multi-tenancy
Method
Tenant per namespace
Advantages
Simple implementation, resource isolation
Disadvantages
Network policy required
🖥️
Node
Compliance-required environments
Method
Tenant per node pool
Advantages
Complete isolation
Disadvantages
Cost increase
🏢
Cluster
Enterprise customers
Method
Tenant per cluster
Advantages
Highest level isolation
Disadvantages
Management complexity

Security Architecture

The Agentic AI Platform applies a 3-layer security model covering external access, internal communication, and data protection.

Agent-Specific Security Considerations:

  • Prompt injection defense: Block malicious prompts with an input validation layer (Guardrails)
  • Tool execution permission limits: Declaratively define callable tools per agent, applying the principle of least privilege
  • PII leakage prevention: Block sensitive information exposure through output filtering
  • Execution time limits: Timeout and maximum step count settings to prevent agent infinite loops
Security Notice
  • Always enable mTLS in production environments
  • Store API keys and tokens in Secrets Manager
  • Perform regular security audits and patch vulnerabilities

Data Flow

The complete flow of how user requests are processed through the platform.

Request Processing Steps
🔐
Step 1-2
Gateway (L5)
Auth, rate limit, guardrail verification
🤖
Step 3
Gateway → Agent (L4)
Agent routing and task assignment
🔍
Step 4-5
Agent → Vector DB (L3)
Context search for RAG
🧠
Step 6-8
Agent → Gateway → Model (L2)
Model inference via gateway (Cascade, Fallback)
📊
Step 9
Observability Plane
Record trace and cost
Step 10-11
Agent → Gateway → Client
Response return

Monitoring and Observability

Key Monitoring Areas

AreaTarget MetricsPurpose
Agent PerformanceRequest count, P50/P99 latency, error rate, step countAgent performance tracking
LLM PerformanceToken throughput, TTFT, TPS, queue wait timeModel serving performance
Resource UsageCPU, memory, GPU utilization/temperatureResource efficiency
Cost TrackingPer-tenant/per-model token cost, infrastructure costCost governance
QualityRAGAS score, Agent success rate, Guardrails pass rateQuality SLO compliance
TrainingTraining frequency, model promotion rate, drift detection countMLOps pipeline health

Example Alert Rules:

  • Agent P99 latency > 10s → Warning
  • Agent error rate > 5% → Critical
  • GPU utilization < 20% (sustained 30 min) → Cost Warning
  • Token cost reaches 80% of daily budget → Budget Warning
  • RAGAS Faithfulness < 0.85 (sustained 1 hour) → Quality Warning
  • Agent Success Rate < 90% (sustained 7 days) → Retraining Trigger

Platform Requirements

AreaLayer / PlaneRequired CapabilityDescription
AI InfrastructureLayer 1Accelerated compute + GPU orchestrationGPU/Trainium/Inferentia, Karpenter·Kueue·DRA, DCGM monitoring
Model ServingLayer 2LLM inference enginePagedAttention, KV Cache optimization, distributed inference, Model Registry
Data LayerLayer 3Vector DB + Cache + Knowledge StoreRAG search, session state storage, long-term memory, feature management
Agent FrameworkLayer 4Workflow engineMulti-step execution, state management, MCP/A2A protocols
GatewayLayer 5Gateway API + routingIntelligent model routing, mTLS, Rate Limiting, External AI integration
Experience·ChannelsLayer 6API/SDK/UI/ChannelsMulti-channel exposure, feedback collection
ObservabilityObservability planeLLM tracing + evaluationToken cost tracking, Agent Trace analysis, RAGAS, drift detection
Governance·SovereigntyGovernance planeMulti-layer security + sovereignty enforcementOIDC/JWT, RBAC, Guardrails, SCP region enforcement, compliance
Model LifecycleLifecycle planeDistributed training + CT + eval gateLoRA/QLoRA fine-tuning, automatic retraining, regression detection, rollback

For specific technology stacks and implementation methods, see AWS Native Platform or EKS-Based Open Architecture.


Conclusion

Core principles of the Agentic AI Platform architecture:

  1. Orthogonal separation of layers and planes: Separate "where inference happens (6 runtime layers)" from "how it is observed, controlled, and improved (3 cross-cutting planes)" to eliminate concern duplication
  2. AI Infrastructure as a first-class layer: Make accelerated compute and its orchestration, monitoring, and performance optimization an explicit bottom-most layer
  3. Hybrid AI: Unified management of self-hosted models and external AI providers through a single gateway
  4. Standard Protocols: Standardized tool connections and inter-agent communication via MCP/A2A
  5. Integrated observability & evaluation: Monitor and evaluate traces, costs, and quality across the entire request flow in a single plane
  6. Governance & sovereignty: Multi-layer security + agent-specific safety (Guardrails) + data sovereignty (SCP region enforcement, in-country, hybrid)
  7. Closed-loop FMOps: Automate feedback → drift detection → retraining → evaluation gate → deployment
  8. Quality-first: Every model change must pass the evaluation gate's statistical validation before production promotion
Implementation Guide

Specific methods for implementing this platform architecture are covered in the following documents:

References

Industry Reference Architectures

Official Documentation

Papers / Technical Blogs