Building Your Own Coding Agent

Build a code-editing agent from scratch in Rust — an LLM, a loop, and three tools in about 400 lines of code.

Getting Started

Set up a Rust project and define the API types for talking to Claude.

[ ] Why Build a Coding Agent? [text] free
[ ] Project Setup and API Types [text]

The Conversation Loop

Build a chat REPL and learn how stateless API calls become a continuous conversation.

[ ] Building a Chat REPL [text] free
[ ] Managing Conversation State [text]

Adding Tools

Define tools, execute them, and watch the agent compose multi-step operations on its own.

[ ] Your First Tool: read_file [text] free
[ ] The Tool Execution Loop [text]
[ ] File Navigation and Editing [text]

Making It Real

Put the complete agent together, add error handling, and explore what comes next.

[ ] The Complete Agent in Action [text] free
[ ] Error Handling and Safety [text]
[ ] Where to Go from Here [text]