Agent Harness Explained | Building Reliable AI Agents | FDE Full Course #20

FDE Full Course #20 An LLM can generate responses. An AI agent can call tools. But what happens when a task requires multiple steps, validation, retries, memory, and recovery from failures? That's where an Agent Harness comes in. In this lecture of our GenAI Full Stack Developer (FDE) series, we'll understand how AI agents actually execute and complete complex tasks, and how a harness manages the entire process. We'll use a practical example of an AI agent generating release notes from Jira tickets to understand why simply connecting an LLM to tools is not enough. What you'll learn: ✅ What is an Agent Harness, and why do we need one? ✅ LLM vs AI Agent vs Agent Harness ✅ The Agent Loop — Plan, Act, Observe, Decide ✅ Tool execution and output validation ✅ Conversation History vs Task State vs Model Context ✅ Context Engineering and Context Compaction ✅ Checkpointing and resuming interrupted tasks ✅ Retry mechanisms, exponential backoff, and execution limits ✅ Human-in-the-Loop and approval workflows ✅ How these components work together to build reliable AI agents We'll also connect these concepts with what we've already learned about tool calling, AI evaluations, and GenAI security. By the end of this video, you'll understand the software infrastructure behind AI agents and why a reliable agent needs more than just an LLM, tools, and a system prompt. Technologies & Concepts: Generative AI, AI Agents, Agent Harness, Spring AI, Java, Spring Boot, Agentic AI, Agent Loop, Context Engineering, Checkpointing. #GenAI #AIAgents #AgentHarness #SpringAI #Java #AgenticAI #CoderArmy ------------------------------------------------------------------------------------------------------------- Code and Notes: Github : https://github.com/adityatandon15/Forward-Deployed-Engineer-Full-Course Spring Boot Full Course : https://youtube.com/playlist?list=PLEYgx5hMdopw&si=o1Njda0XgYXwg4xs JAVA Full Course Series : https://youtube.com/playlist?list=PLQEaRBV9gAFsR15tNo2QLF9d2qc-c018p&si=4qQP_euMTZMvAwNu Join our WhatsApp Group: https://www.whatsapp.com/channel/0029VbBF1XKF1YlMyYuPM23s We have paid courses on DSA, Web Development , Blockchain, System Design & GenAI. Join Courses: https://strikes.in/ Coder Army Website: https://coderarmy.in/#home Coder Army App: https://play.google.com/store/apps/details?id=com.rohit.negi Connect with Aditya Tandon Instagram : https://www.instagram.com/itsadityatandon LinkedIn : https://www.linkedin.com/in/adityatandon2 Twitter : https://x.com/adityatandon02 Timestamps: