Write a Simple Version of Claude Code in 300+ Lines!

Build an AI coding agent in 300+ lines! Automates programming, debugging, and refactoring using function calling and agent loops. Learn core AI agent concepts.

“AI Disruption” Publication 7900 Subscriptions 20% Discount Offer Link.

---

Using just over 300 lines of code, implement an automatic code-writing AI Agent that autonomously programs, fixes bugs, and refactors code after receiving a task.

Simply say “create a flask app,” and it will automatically complete the entire workflow of project planning, code writing, and execution, while explaining its detailed thought process and implementation steps, working just like Claude Code.

Through this simple project, we can learn the most fundamental and core processes of Agent creation. Building on this foundation, learning some universal and comprehensive frameworks will lead to a deeper understanding.

Before starting, you need to understand several concepts:

1. Function Calling

AI itself doesn’t execute code, but it tells you “I want to call the read_file function with the parameter main.py.” Your program receives the instruction, actually reads the file, and then returns the result to the AI.