Chapter 2

Building Your First Agent

Turn the mental model from Chapter 1 into working code. You'll build a complete agent using the OpenAI Assistants API with tool calling, conversation management, and a production-friendly agent loop.

What you'll learn

  • Setting up the OpenAI Assistants API from scratch
  • Understanding function calling and tool definitions
  • Building a research assistant agent step by step
  • Conversation management and context handling
  • Error handling patterns for reliable agents
  • Testing your agent before shipping
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