DEV Community guide shows how to build a TypeScript AI agent in 150 lines

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A tutorial published on DEV Community walks developers through building a functional AI research assistant using TypeScript and Anthropic's Claude API, without relying on any external AI frameworks. The agent is designed to accept user questions, perform web searches via tools, retain conversation history, and handle errors gracefully. The project requires only Node.js 18 or higher, basic TypeScript knowledge, and a free Anthropic API key to get started. The guide covers project setup, type definitions, a mock web search tool, and a core agent class that manages conversation state and tool-calling logic. While the author notes the result is not production-ready, the stated goal is to give developers a clear, line-by-line understanding of how AI agents function.

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ProgrammingDEV Community ·

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