# πŸš€ Master Knowledge Base & Content Roadmap > **System Overview**: 24 Technical Guides β€’ 292 Knowledge Terms β€’ 9 Visual Simulators β€’ 7 Staff System Design Modules β€’ 24 Architectural Code Templates across 6 Core Pillars. --- ## πŸ“Š Coverage & Completion Status ```text [β–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆ] 100% COVERAGE! All 6 Master Domains & 24 Guides Fully Available! βœ… Unified Master Knowledge Base (292 Terms across 19 Domains with 4-part interview depth) βœ… Interactive Progress Tracking Checklist (Saved to localStorage with Real-time Progress Bar) βœ… Left Architecture Tree Navigation (with 'β–Έ Headlines' & 'β–Ύ Expand' one-glance view) βœ… 9 Interactive Engineering Simulators (RAG, Signals, OAuth2 PKCE, .NET DI, Saga, Event Loop, Fiber, Redux, esbuild) βœ… Staff System Design Hub Complete: 7 Interactive Deep-Dive Modules, Visualizers & Math Calculators βœ… Interactive Graph Topology Dashboard Complete: Physics Engine, Multi-Axis Taxonomies & Responsive Camera βœ… Multi-Device & Mobile Responsiveness Complete: Off-Canvas Drawer, Snap Rails, Single-Column Stack, Touch Gestures βœ… Context-Aware BYOK AI Interview Coach Complete: Groq, Gemini, OpenAI, OpenRouter Integration βœ… Pillar 1 Complete: 5 In-Depth Guides across Backend & .NET Core βœ… Pillar 2 Complete: 4 In-Depth Guides across Distributed Systems & System Design βœ… Pillar 3 Complete: 4 In-Depth Guides across Cloud Platforms (AWS/Azure) & DevOps (K8s/Terraform) βœ… Pillar 4 Complete: 4 In-Depth Guides across Security (OAuth2/OWASP) & Data Engineering (SQL/DynamoDB) βœ… Pillar 5 Complete: 8 In-Depth Guides across Frontend Engineering (Foundations, JS/TS, Angular, React Hooks & RTK) βœ… Pillar 6 Complete: 3 In-Depth Guides across AI Enablement (RAG, Azure OpenAI, Semantic Kernel & Copilot SDLC) ``` --- ## πŸ—ΊοΈ Detailed Guide Roadmap (6 Core Pillars & System Design Hub) ### πŸ›οΈ Staff System Design Hub (`docs/system_design/`) - [x] `fundamentals.html` - System Design Fundamentals: CAP Theorem, PACELC, Latency Numbers Every Programmer Should Know, Consistency Models, ACID vs BASE - [x] `hld_framework.html` - 4-Step HLD Interview Framework, Live Back-of-the-Envelope Capacity Estimator (QPS, Storage, Bandwidth, Memory/Cache), SLA Availability Matrix - [x] `storage_and_caching.html` - Storage Engines (LSM-Trees vs B+Trees), SSTables, Compaction, Bloom Filter Simulator & Distributed Cache Anomaly Mitigation (Thundering Herd, Penetration, Avalanche) - [x] `consensus_and_transactions.html` - Distributed Consensus (Raft vs Paxos), Tunable Quorum ($N, R, W$) Simulator, Fencing Tokens & Orchestrated Saga State Machine - [x] `architectural_primitives.html` - Architectural Primitives: Rate Limiting Algorithms (Token Bucket, Sliding Window), Consistent Hashing with Virtual Nodes & L4/L7 Load Balancers - [x] `case_studies.html` - Tier-1 Production Case Studies: Uber/Lyft Geospatial (H3 Hexagonal Grid Visualizer), Flash Sale Inventory Reservation (Atomic Redis Lua Simulator), Distributed Task Scheduler, Web Crawler, TinyURL, WhatsApp & Netflix - [x] `observability_request_flow.html` - Interactive End-to-End Request Lifecycle & Distributed Tracing Simulator (DNS βž” CDN βž” ALB βž” API Gateway βž” Service Mesh βž” Microservices βž” DB/Cache with OTel, Prometheus, ELK) --- ### 🧠 Pillar 1: Backend & .NET Core (`guides/01_dotnet_backend/`) - [x] `01_csharp_internals.md` - C# 12/13 Internals, CLR Memory, GC Generations, `Span`, RyuJIT - [x] `02_aspnetcore_webapi.md` - ASP.NET Core Web API, Middleware Chain, DI Lifetimes & Captive Dependencies - [x] `03_efcore_optimization.md` - EF Core Query Tuning, Split Queries, Compiled Queries, Caching & Redis - [x] `04_async_threading.md` - Async/Await State Machines, ThreadPool Starvation, `System.Threading.Channels` & Background Services - [x] `05_grpc_signalr.md` - gRPC Protocol Buffers & HTTP/2 Streaming vs SignalR Real-Time Hubs --- ### πŸ—οΈ Pillar 2: Distributed Systems & System Design (`guides/02_distributed_systems/`) - [x] `01_microservices_decomposition.md` - Domain Decompositions, Strangler Fig, API Gateway & BFF Architecture - [x] `02_ddd_cqrs_event_sourcing.md` - Domain-Driven Design (DDD), Aggregates, Bounded Contexts, CQRS & Event Sourcing - [x] `03_saga_outbox_resiliency.md` - Saga Pattern, Transactional Outbox, Kafka vs RabbitMQ vs SQS, Polly Resiliency - [x] `04_hld_lld_framework.md` - System Design HLD/LLD: Scalability, Caching Strategies, Sharding, Rate Limiting --- ### ☁️ Pillar 3: Cloud Platforms & DevOps (`guides/03_cloud_devops/`) - [x] `01_aws_cloud_native.md` - AWS Architecture: Lambda, ECS Fargate, EKS, DynamoDB, S3, SQS/SNS, EventBridge - [x] `02_azure_enterprise.md` - Azure Enterprise: App Services, Azure Functions, Cosmos DB, Key Vault & Managed Identities - [x] `03_docker_kubernetes.md` - Docker Multi-Stage Optimization, Kubernetes Pod/Deployment/Service, Ingress & Helm - [x] `04_terraform_cicd_pipelines.md` - Terraform IaC, Remote State Locking, CI/CD Quality Gates (SonarQube/Trivy) --- ### πŸ” Pillar 4: Security & Data Engineering (`guides/04_security_database/`) - [x] `01_oauth2_oidc_jwt.md` - OAuth 2.0 Grant Types (PKCE, Client Credentials), OpenID Connect & JWT Token Lifecycle - [x] `02_owasp_secure_coding.md` - OWASP Top 10 Enterprise Mitigation (BOLA, SQLi, SSRF, CSRF) & Zero-Trust Architecture - [x] `03_sql_query_tuning.md` - SQL Server Execution Plans, Index Tuning (Clustered/Non-Clustered/Covering), DMV Diagnostics - [x] `04_dynamodb_data_modeling.md` - DynamoDB Single-Table Design, Composite Keys (PK/SK), Sparse Indexes & GSI Access Patterns --- ### 🎨 Pillar 5: Frontend Engineering (`guides/05_frontend_engineering/`) - [x] `01_fe_foundations.md` - HTML5 Semantics, Modern CSS3 Layouts (Flexbox/Grid), Core Web Vitals (LCP, INP, CLS) - [x] `02_browser_rendering.md` - Browser Rendering Engine: DOM/CSSOM Construction, Layout, Paint, Composite & Reflows - [x] `03_js_core_event_loop.md` - JavaScript V8 Engine, Execution Context, Closures, Event Loop & Microtask Priority - [x] `04_typescript_advanced.md` - TypeScript Advanced Type System: Generics, Discriminated Unions, Mapped & Template Literal Types - [x] `05_angular_architecture.md` - Angular Enterprise Architecture: Modules, Standalone Components, DI & Lifecycle Hooks - [x] `06_rxjs_ngrx_signals.md` - RxJS Streams, NgRx Immutable Store & Angular Fine-Grained Signals Reactivity - [x] `07_react_fiber_reconciliation.md` - React Fiber Architecture, 2-Phase Reconciliation & Virtual DOM Diffing Heuristics - [x] `08_react_hooks_redux_toolkit.md` - Custom Hooks Lifecycle, State Hoisting vs Redux Toolkit (RTK) Event-Sourcing --- ### πŸ€– Pillar 6: AI Enablement & Modern SDLC (`guides/06_ai_engineering/`) - [x] `01_rag_vector_search.md` - Retrieval-Augmented Generation (RAG) Architecture, Embeddings & Vector Search (Cosine/HNSW) - [x] `02_azure_openai_semantic_kernel.md` - Azure OpenAI Enterprise Integration, Microsoft Semantic Kernel SDK in .NET - [x] `03_ai_assisted_sdlc.md` - AI-Assisted Engineering: GitHub Copilot, Prompt Engineering, Automated Unit Test Gen & Code Reviews --- ## πŸ“¦ Asset Inventory Summary | Asset Type | Count | Status | |---|---|---| | In-Depth Guides (`.md`) | 24 | βœ… All Complete | | Code Templates (runnable files) | 24 | βœ… All Complete | | Interactive Simulators (`.html`) | 9 | βœ… All Complete | | Staff System Design Modules (`.html`) | 7 | βœ… All Complete | | Case Study Visual Pipelines | 7 | βœ… All Complete | | Knowledge Base Terms | 292 | βœ… All Complete | | Curated Modern UI Themes | 5 | βœ… All Complete | --- ## 🎨 UI/UX Modernization & Platform Polish Milestones - [x] **5-Theme CSS Design Token System** (`obsidian-dark`, `slate-light`, `alpine-nord`, `warm-sepia`, `tokyo-midnight`) - [x] **Header & Mobile Theme Switchers** (Dropdown Studio + Alt+T Shortcut + Mobile Drawer Grid) - [x] **Zero-Overhead Color Tokenization** Across all Cards, Sticky Headers, Rails, and Modals - [x] **Phase 1: Reader & Visual Polish**: Mouse Spotlight Glow FX (`--mouse-x/y`), Editorial Typography, 1-Click Code Copy Buttons, Dynamic Read-Time Badges (`⏱️ X min read`), and Sticky Reading Progress Scroll Tracker - [x] **Phase 2: Universal Command Palette**: `⌘K` / `Ctrl+K` and `/` Keyboard Jump Dialog with Live Instant Search across 24 Guides, 7 System Design Modules, 9 Simulators, Navigation, and Theme Switching - [x] **Phase 3: Header Interview Readiness Mastery Gauge**: Real-Time Header Mastery Bar & Percentage with Domain Breakdown Popover, Synchronized with Quick Recap Checklists - [x] **Phase 4: Staff System Design Deep Dive & Interactive Pipelines**: - Storage & Caching: LSM-Tree vs B+Tree, SSTables, Bloom Filter Simulator, Thundering Herd singleflight. - Consensus & Transactions: Raft vs Paxos, Tunable Quorum ($N, R, W$) Simulator, Fencing Tokens, Orchestrated Saga State Machine. - Tier-1 Case Studies: 7 End-to-End Interactive Data Flow Pipelines with Step Inspectors, Live Request Flow Tracing, and 7 embedded simulators. - Automated Interactivity Validation: Comprehensive click & DOM integrity testing suite in `tests/validate_interactions.js`.