Key Layers of the GenAI Technology Stack

Everyone is talking about AI agents, but very few people actually break down the technical architecture that makes them work. To make sense of it, I put together the 7-layer technical architecture of agentic AI systems. Think of it as a stack where each layer builds on top of the other, from the raw infrastructure all the way to the applications we interact with. 1. Infrastructure and Execution Environment This is the foundation. It includes APIs, GPUs, TPUs, orchestration engines like Airflow or Prefect, monitoring tools like Prometheus, and cloud storage systems such as S3 or GCS. Without this base, nothing else runs. 2. Agent Communication and Networking Once you have infrastructure, agents need to talk to each other and to the environment. This layer covers frameworks for multi-agent systems, memory management (short-term and long-term), communication protocols, embedding stores like Pinecone, and action APIs. 3. Protocol and Interoperability This is where standardization comes in. Protocols like Agent-to-Agent (A2A), Model Context Protocol (MCP), Agent Negotiation Protocol (ANP), and open gateways allow different agents and tools to interact in a consistent way. Without this layer, you end up with isolated systems that cannot coordinate. 4. Tool Orchestration and Enrichment Agents are powerful because they can use tools. This layer enables retrieval-augmented generation, vector databases such as Chroma or FAISS, function calling through LangChain or OpenAI tools, web browsing modules, and plugin frameworks. It is what allows agents to enrich their reasoning with external knowledge and execution capabilities. 5. Cognitive Processing and Reasoning This is the brain of the system. Agents need planning engines, decision-making modules, error handling, self-improvement loops, guardrails, and ethical AI mechanisms. Without reasoning, an agent is just a connector of inputs and outputs. 6. Memory Architecture and Context Modeling Intelligent behavior requires memory. This layer includes short-term and long-term memory, identity and preference modules, emotional context, behavioral modeling, and goal trackers. Memory is what allows agents to adapt and become more effective over time. 7. Intelligent Agent Application Finally, this is where it all comes together. Applications include personal assistants, content creation tools, e-commerce agents, workflow automation, research assistants, and compliance agents. These are the systems that people and businesses actually interact with, built on top of the layers below. When you put these seven layers together, you can see agentic AI not as a single tool but as an entire ecosystem. Each layer is necessary, and skipping one often leads to fragile or incomplete solutions. ---- ✅ I post real stories and lessons from data and AI. Follow me and join the newsletter at www.theravitshow.com

I frequently see conversations where terms like LLMs, RAG, AI Agents, and Agentic AI are used interchangeably, even though they represent fundamentally different layers of capability. This visual guides explain how these four layers relate—not as competing technologies, but as an evolving intelligence architecture. Here’s a deeper look: 1. 𝗟𝗟𝗠 (𝗟𝗮𝗿𝗴𝗲 𝗟𝗮𝗻𝗴𝘂𝗮𝗴𝗲 𝗠𝗼𝗱𝗲𝗹) This is the foundation. Models like GPT, Claude, and Gemini are trained on vast corpora of text to perform a wide array of tasks: – Text generation – Instruction following – Chain-of-thought reasoning – Few-shot/zero-shot learning – Embedding and token generation However, LLMs are inherently limited to the knowledge encoded during training and struggle with grounding, real-time updates, or long-term memory. 2. 𝗥𝗔𝗚 (𝗥𝗲𝘁𝗿𝗶𝗲𝘃𝗮𝗹-𝗔𝘂𝗴𝗺𝗲𝗻𝘁𝗲𝗱 𝗚𝗲𝗻𝗲𝗿𝗮𝘁𝗶𝗼𝗻) RAG bridges the gap between static model knowledge and dynamic external information. By integrating techniques such as: – Vector search – Embedding-based similarity scoring – Document chunking – Hybrid retrieval (dense + sparse) – Source attribution – Context injection …RAG enhances the quality and factuality of responses. It enables models to “recall” information they were never trained on, and grounds answers in external sources—critical for enterprise-grade applications. 3. 𝗔𝗜 𝗔𝗴𝗲𝗻𝘁 RAG is still a passive architecture—it retrieves and generates. AI Agents go a step further: they act. Agents perform tasks, execute code, call APIs, manage state, and iterate via feedback loops. They introduce key capabilities such as: – Planning and task decomposition – Execution pipelines – Long- and short-term memory integration – File access and API interaction – Use of frameworks like ReAct, LangChain Agents, AutoGen, and CrewAI This is where LLMs become active participants in workflows rather than just passive responders. 4. 𝗔𝗴𝗲𝗻𝘁𝗶𝗰 𝗔𝗜 This is the most advanced layer—where we go beyond a single autonomous agent to multi-agent systems with role-specific behavior, memory sharing, and inter-agent communication. Core concepts include: – Multi-agent collaboration and task delegation – Modular role assignment and hierarchy – Goal-directed planning and lifecycle management – Protocols like MCP (Anthropic’s Model Context Protocol) and A2A (Google’s Agent-to-Agent) – Long-term memory synchronization and feedback-based evolution Agentic AI is what enables truly autonomous, adaptive, and collaborative intelligence across distributed systems. Whether you’re building enterprise copilots, AI-powered ETL systems, or autonomous task orchestration tools, knowing what each layer offers—and where it falls short—will determine whether your AI system scales or breaks. If you found this helpful, share it with your team or network. If there’s something important you think I missed, feel free to comment or message me—I’d be happy to include it in the next iteration.

Generative AI is a complete set of technologies that work together to provide intelligence at scale. This stack includes the foundation models that create text, images, audio, or code. It also features production monitoring and observability tools that ensure systems are reliable in real-world applications. Here’s how the stack comes together: 1. 🔹Foundation Models At the base, we have models trained on large datasets, covering text (GPT, Mistral, Anthropic), audio (ElevenLabs, Speechify, Resemble AI), 3D (NVIDIA, Luma AI, Open Source), image (Stability AI, Midjourney, Runway, ClipDrop), and code (Codium, Warp, Sourcegraph). These are the core engines of generation. 2. 🔹Compute Interface To power these models, organizations rely on GPU supply chains (NVIDIA, CoreWeave, Lambda) and PaaS providers (Replicate, Modal, Baseten) that provide scalable infrastructure. Without this computing support, modern GenAI wouldn’t be possible. 3. 🔹Data Layer Models are only as good as their data. This layer includes synthetic data platforms (Synthesia, Bifrost, Datagen) and data pipelines for collection, preprocessing, and enrichment. 4. 🔹Search & Retrieval A key component is vector databases (Pinecone, Weaviate, Milvus, Chroma) that allow for efficient context retrieval. They power RAG (Retrieval-Augmented Generation) systems and keep AI responses grounded. 5. 🔹ML Platforms & Model Tuning Here we find training and fine-tuning platforms (Weights & Biases, Hugging Face, SageMaker) alongside data labeling solutions (Scale AI, Surge AI, Snorkel). This layer helps models adjust to specific domains, industries, or company knowledge. 6. 🔹Developer Tools & Infrastructure Developers use application frameworks (LangChain, LlamaIndex, MindOS) and orchestration tools that make it easier to build AI-driven apps. These tools connect raw models and usable solutions. 7. 🔹Production Monitoring & Observability Once deployed, AI systems need supervision. Tools like Arize, Fiddler, Datadog and user analytics platforms (Aquarium, Arthur) track performance, identify drift, enforce firewalls, and ensure compliance. This is where LLMOps comes in, making large-scale deployments reliable, safe, and clear. The Generative AI Stack turns raw model power into practical AI applications. It combines compute, data, tools, monitoring, and governance into one seamless ecosystem. #GenAI