The Surprisingly Simple Power of LLM Agent Loops with Tool Use

2025-05-15

The author and their team built an AI programming assistant called Sketch, whose core is a surprisingly simple loop: the LLM receives user input, performs actions (potentially involving tool calls like bash), and outputs results. This simple loop, combined with powerful LLMs like Claude 3.7 Sonnet, allows Sketch to efficiently handle many programming tasks such as git operations, code modifications, and error handling. The author believes this LLM agent loop approach will find widespread use in everyday automation, drastically improving efficiency.