# {{Project Name}} LLM System Architecture [[LLM: Initial Setup 1. Replace {{Project Name}} with the actual project name 2. Review requirements documents and agent specifications 3. Design for scalability, reliability, and observability 4. Consider multi-agent orchestration if applicable Output file location: `docs/architecture/llm-architecture.md`]] ## Architecture Overview [[LLM: Provide high-level overview of the LLM system architecture, including key components and their interactions.]] ````mermaid graph TB subgraph "Client Layer" WEB[Web Client] MOB[Mobile Client] API[API Client] end subgraph "Gateway Layer" GW[API Gateway] AUTH[Auth Service] RL[Rate Limiter] end subgraph "LLM Services Layer" ORCH[LLM Orchestrator] AGENT1[Agent 1] AGENT2[Agent 2] AGENTN[Agent N] end subgraph "Infrastructure Layer" QUEUE[Message Queue] CACHE[Cache Layer] VS[Vector Store] KG[Knowledge Graph] end subgraph "Model Layer" LLM[LLM Service] EMB[Embedding Service] SPEC[Specialized Models] end subgraph "Observability" LOG[Logging] TRACE[Tracing] METRIC[Metrics] ALERT[Alerting] end WEB --> GW MOB --> GW API --> GW GW --> AUTH GW --> RL RL --> ORCH ORCH --> AGENT1 ORCH --> AGENT2 ORCH --> AGENTN AGENT1 --> LLM AGENT2 --> LLM AGENTN --> SPEC AGENT1 --> VS AGENT2 --> KG ORCH --> QUEUE ORCH --> CACHE ORCH --> LOG ORCH --> TRACE ORCH --> METRIC METRIC --> ALERT ```text ## System Components ### Core LLM Services <> #### {{Service Name}} - **Purpose**: {{service-purpose}} - **Technology**: {{tech-stack}} - **Scaling Strategy**: {{horizontal/vertical}} - **Dependencies**: {{service-dependencies}} - **SLA**: {{availability-target}} **Key Responsibilities**: - {{responsibility-1}} - {{responsibility-2}} - {{responsibility-3}} **Resource Requirements**: - CPU: {{cpu-specs}} - Memory: {{memory-specs}} - GPU: {{gpu-specs-if-needed}} <> ### Agent Architecture [[LLM: Detail the architecture for individual LLM agents.]] #### Agent Design Pattern - **Pattern**: {{Hub-and-Spoke/Pipeline/Mesh/Hierarchical}} - **Communication**: {{sync/async/event-driven}} - **State Management**: {{stateless/stateful-approach}} - **Coordination**: {{orchestration-method}} #### Agent Registry ```yaml agents: - id: '[object Object]': null type: '[object Object]': null model: '[object Object]': null endpoints: - '{{endpoint-1}}' - '{{endpoint-2}}' capabilities: - '{{capability-1}}' - '{{capability-2}}' resources: maxConcurrency: '[object Object]': null timeout: '[object Object]': null retries: '[object Object]': null ```` ### Model Serving Infrastructure #### LLM Service Architecture - **Serving Framework**: {{TorchServe/TensorFlow Serving/Triton}} - **Model Loading**: {{strategy}} - **Request Batching**: {{batching-config}} - **Caching Strategy**: {{cache-layers}} - **Fallback Models**: {{fallback-config}} #### Embedding Service - **Model**: {{embedding-model}} - **Vector Dimensions**: {{dimensions}} - **Batch Size**: {{optimal-batch}} - **Cache TTL**: {{cache-duration}} ### Data Architecture #### Vector Store - **Technology**: {{Pinecone/Weaviate/Qdrant/pgvector}} - **Index Type**: {{index-strategy}} - **Partitioning**: {{partitioning-strategy}} - **Replication**: {{replication-factor}} - **Backup Strategy**: {{backup-approach}} #### Knowledge Management - **Knowledge Graph**: {{Neo4j/Neptune/Dgraph}} - **Document Store**: {{MongoDB/Elasticsearch}} - **Feature Store**: {{Feast/Tecton}} - **Data Pipeline**: {{Apache Airflow/Prefect}} ## Multi-Agent Orchestration [[LLM: If multi-agent system, detail orchestration architecture.]] ### Orchestration Patterns #### Communication Protocols - **Message Format**: {{JSON/Protocol Buffers/Avro}} - **Transport**: {{REST/gRPC/WebSocket/Message Queue}} - **Discovery**: {{service-discovery-method}} - **Load Balancing**: {{round-robin/least-conn/weighted}} #### Workflow Management ````yaml workflow: name: '[object Object]': null trigger: '[object Object]': null steps: - name: '[object Object]': null agent: '[object Object]': null input: '[object Object]': null output: '[object Object]': null timeout: '[object Object]': null onError: '[object Object]': null - name: '[object Object]': null parallel: - agent: '[object Object]': null - agent: '[object Object]': null join: '[object Object]': null ```text ### State Management #### Session State - **Storage**: {{Redis/DynamoDB/Cosmos}} - **TTL**: {{session-duration}} - **Consistency**: {{eventual/strong}} - **Partitioning**: {{partition-key}} #### Context Management - **Context Window**: {{max-tokens}} - **Compression**: {{strategy}} - **History Storage**: {{storage-approach}} - **Retrieval Strategy**: {{retrieval-method}} ## Scalability Design ### Horizontal Scaling #### Auto-scaling Policies <> - **Metric**: {{cpu/memory/requests/custom}} - **Target**: {{threshold}} - **Min Instances**: {{min}} - **Max Instances**: {{max}} - **Cool Down**: {{seconds}} <> #### Load Distribution - **Load Balancer**: {{ALB/NLB/custom}} - **Health Checks**: {{endpoint-and-interval}} - **Session Affinity**: {{enabled/disabled}} - **Geographic Distribution**: {{regions}} ### Performance Optimization #### Caching Strategy - **Response Cache**: {{Redis/Memcached}} - **Embedding Cache**: {{local/distributed}} - **Model Cache**: {{gpu-memory-management}} - **CDN Integration**: {{CloudFront/Fastly}} #### Request Optimization - **Batching Window**: {{milliseconds}} - **Queue Management**: {{priority-queues}} - **Connection Pooling**: {{config}} - **Circuit Breakers**: {{thresholds}} ## Security Architecture ### Authentication & Authorization - **Identity Provider**: {{Auth0/Cognito/Okta}} - **Token Management**: {{JWT/OAuth2}} - **API Keys**: {{rotation-policy}} - **Role-Based Access**: {{RBAC-model}} ### Data Security - **Encryption at Rest**: {{method}} - **Encryption in Transit**: {{TLS-version}} - **Key Management**: {{KMS/Vault}} - **PII Protection**: {{masking/tokenization}} ### LLM-Specific Security - **Prompt Injection Prevention**: {{measures}} - **Output Filtering**: {{content-moderation}} - **Rate Limiting**: {{per-user/per-ip}} - **Audit Logging**: {{what-is-logged}} ## Observability Architecture ### Monitoring Stack #### Metrics Collection ```yaml metrics: - name: ai_request_duration type: histogram labels: - agent - model - status buckets: - 0.1 - 0.5 - 1 - 2 - 5 - 10 - name: ai_token_usage type: counter labels: - agent - model - type - name: ai_error_rate type: gauge labels: - agent - error_type ```` #### Distributed Tracing - **Framework**: {{OpenTelemetry/Jaeger}} - **Sampling Rate**: {{percentage}} - **Retention**: {{days}} - **Critical Paths**: {{traced-workflows}} #### Logging Architecture - **Log Aggregation**: {{ELK/Splunk/CloudWatch}} - **Log Levels**: {{structured-logging-schema}} - **Retention Policy**: {{hot/warm/cold}} - **Sensitive Data**: {{redaction-rules}} ### Alerting Strategy <> #### {{Alert Name}} - **Condition**: {{metric-threshold}} - **Severity**: {{Critical/High/Medium/Low}} - **Channel**: {{email/slack/pagerduty}} - **Runbook**: {{link-to-runbook}} <> ## Deployment Architecture ### Container Strategy - **Container Runtime**: {{Docker/containerd}} - **Orchestration**: {{Kubernetes/ECS/Cloud Run}} - **Image Registry**: {{ECR/GCR/ACR}} - **Base Images**: {{security-hardened}} ### CI/CD Pipeline ```yaml pipeline: stages: - name: test steps: - unit-tests - integration-tests - prompt-tests - safety-tests - name: build steps: - docker-build - security-scan - push-registry - name: deploy environments: - dev: auto - staging: manual - production: approval-required ``` ## Disaster Recovery ### Backup Strategy - **Data Backup**: {{frequency-and-retention}} - **Model Backup**: {{versioning-strategy}} - **Configuration Backup**: {{git-backed}} - **Recovery Testing**: {{schedule}} ### Failover Design - **Primary Region**: {{region-1}} - **DR Region**: {{region-2}} - **RTO**: {{recovery-time-objective}} - **RPO**: {{recovery-point-objective}} - **Failover Process**: {{manual/automatic}} ## Cost Optimization ### Resource Allocation - **Compute**: {{instance-types-and-counts}} - **Storage**: {{storage-tiers}} - **Network**: {{bandwidth-optimization}} - **Model Serving**: {{gpu-sharing-strategy}} ### Cost Controls - **Budget Alerts**: {{thresholds}} - **Resource Limits**: {{quotas}} - **Spot Instances**: {{usage-percentage}} - **Reserved Capacity**: {{commitment}} ## Technology Stack Summary ### Core Technologies - **Language**: {{primary-language}} - **Framework**: {{web-framework}} - **LLM Framework**: {{langchain/llamaindex/custom}} - **Container**: {{docker/podman}} - **Orchestration**: {{kubernetes/ecs}} ### LLM/ML Stack - **LLM Provider**: {{OpenAI/Anthropic/Google/Self-hosted}} - **Vector DB**: {{choice-and-version}} - **ML Framework**: {{PyTorch/TensorFlow}} - **Serving**: {{TorchServe/Triton}} - **Monitoring**: {{LangSmith/Custom}} ### Infrastructure - **Cloud Provider**: {{AWS/GCP/Azure}} - **IaC**: {{Terraform/CloudFormation/Pulumi}} - **Secrets**: {{Vault/KMS/Secret Manager}} - **CDN**: {{CloudFront/Fastly/Akamai}} ## Migration and Evolution ### Phase 1: MVP Architecture - {{mvp-components}} - {{simplified-architecture}} ### Phase 2: Production Architecture - {{production-enhancements}} - {{scalability-additions}} ### Phase 3: Advanced Features - {{future-capabilities}} - {{architectural-evolution}} ## Architecture Decision Records <> ### ADR-{{number}}: {{Decision Title}} - **Status**: {{Accepted/Rejected/Superseded}} - **Context**: {{why-needed}} - **Decision**: {{what-decided}} - **Consequences**: {{implications}} <> ## References and Resources - **Architecture Diagrams**: {{diagram-location}} - **API Documentation**: {{api-docs}} - **Runbooks**: {{operations-docs}} - **Security Policies**: {{security-docs}}