Rewriting Claude Code in Rust

It's late. You're getting the builder itch - the kind of itch that never truly leaves you until you've actually built something. Whether you're actually going to use it in a week or so is another matter entirely, but that's besides the point. Your computer is turned on, you have Claude Code open in the terminal tab for your editor. You've been using it for a little while now. And this gets you thinking. Surely it can't be that hard to build a coding agent, right? It's basically just an LLM with some tools and access to your filesystem? In this post, we'll build a small demo that will be able to act as a minimal demo version of Claude Code written in Rust using the Rig AI framework. It will be able to use bash commands, read and write files, as well as stream output back to you. Interested in just trying out the demo for yourself? Here it is. Getting started Before we get started, you'll need the Rust programming language installed . You will also need an API key for the model provider