From Prompts to Agents: Building AI Agents from Scratch

This series walks through building an AI agent from the ground up. We start with a simple prompt-response loop and progressively add tools, memory, reasoning, planning, and observability.

Each tutorial builds on the previous one, using a code review assistant as our running example.

Part 1: From Prompts to Agents: Understanding the AI Agent Loop

November 3, 2025 · 4 min read

Introduction You have probably heard the term AI Agent, often mentioned, but not always clearly explained. In this tutorial series, we will demystify what AI agents really are.

Part 2: Agents Tool Use: Adding Actions to your AI agent

November 3, 2025 · 15 min read

So far, our AI Code Assistant has learned how to think - it can read code and make intelligent suggestions.

Part 3: Adding Memory to your Agent: Short-Term and Long-Term memory in practice

November 3, 2025 · 42 min read

Introduction In our previous tutorials, we built a code review agent that uses tools. But there’s a critical limitation:our agent has no memory between interactions. Every time we call think(),…

Part 4: Agents That Think: Introducing the ReAct Pattern

November 19, 2025 · 12 min read

In our previous tutorials, we established the basic building blocks of an LLM agent. We implemented the observe,think,act loop, we added tool use and memory. Our agent can now read…

Part 5: Planning and Task Decomposition in AI Agents

December 15, 2025 · 27 min read

In the previous tutorial we built a code review agent that uses the ReAct pattern to reason about tasks, call tools and manage memory. However, our agent still handles tasks…

Part 6: Observability and Debugging AI Agents

December 22, 2025 · 55 min read