How AI Agents Work: 5 Agentic Design Patterns Explained

How do AI agents work? In this video, you'll learn the fundamentals of AI agent architecture and 5 essential agentic design patterns used to build AI systems that can use tools, coordinate tasks, and improve their outputs. We'll break down how AI agents work under the hood, how LLMs interact with tools, and how developers combine different workflows to build practical agentic AI applications. *WHAT YOU'LL LEARN* What an AI agent is and how its control loop works AI agent architecture: models, tools, state, and guardrails Prompt chaining for multi-step AI workflows Routing requests to specialized handlers Parallelization for independent tasks Orchestrator-worker architecture for complex tasks Evaluator-optimizer loops for iterative improvement How to combine agentic design patterns into one system Why validation, permissions, and stopping conditions matter *THE 5 AI AGENT WORKFLOW PATTERNS* 1. Prompt Chaining — Break complex tasks into sequential steps. 2. Routing — Send different requests to the appropriate workflow. 3. Parallelization — Run independent tasks simultaneously. 4. Orchestrator-Workers — Dynamically divide complex goals into subtasks. 5. Evaluator-Optimizer — Evaluate and revise outputs against defined criteria. *VIDEO CHAPTERS* 00:00 — How AI Agents Actually Work 00:35 — What Is an AI Agent? 01:30 — Prompt Chaining 02:30 — Routing 03:25 — Parallelization 04:20 — Orchestrator-Workers 05:35 — Evaluator-Optimizer 06:40 — Combining the Five Patterns 07:55 — AI Agent Guardrails and Reliability 08:35 — Recap: Which Pattern Should You Use? *WHO IS THIS VIDEO FOR?* Developers, software engineers, AI enthusiasts, and anyone learning about AI agents, LLM agents, agentic AI, AI automation, and modern AI system architecture. *JOIN THE DISCUSSION* Which AI agent workflow pattern would you use to build your first agent? Tell us in the comments. Subscribe for practical explanations of AI engineering, LLMs, AI agents, software architecture, and the technology behind modern AI systems. #AIAgents #AgenticAI #AIEngineering #howAIagentswork #AIagentarchitecture #agenticdesignpatterns #AIagentsexplained #agenticAI